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        132 Temporary API jobs in London + 20 miles

        Senior Full Stack Developer JavaScript Python API

        Client Server
        W6, West London
        £85000 - £100000 per annum
        Senior Full Stack Developer / Engineer (JavaScript Python API) London to £100k Opportunity to progress your career in a senior, hands-on Senior Full Stack Developer role at a scale-up tech company, that enables smart matching for commercial van drivers and consumers, via job bidding and route optimisation, streamlining processes and delivering CO2 carbon neutral targets, the company has been established 10 years, with recent funding of £125 million. You'll be working on complex and interesting systems and can enjoy a range of benefits and perks. As a Senior Full Stack Developer you'll collaborate as part of an Agile technology team to design and develop, troubleshoot and solve complex software issues to help scale and future proof the business.
        Senior Full Stack Developer / Engineer (JavaScript Python API) London to £100k Opportunity to progress your career in a senior, hands-on Senior Full Stack Developer role at a scale-up tech company, that enables smart matching for commercial van drivers and consumers, via job bidding and route optimisation, streamlining processes and delivering CO2 carbon neutral targets, the company has been established 10 years, with recent funding of £125 million. You'll be working on complex and interesting systems and can enjoy a range of benefits and perks. As a Senior Full Stack Developer you'll collaborate as part of an Agile technology team to design and develop, troubleshoot and solve complex software issues to help scale and future proof the business.
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        NEWPREMIUM

        Backend Software Engineer Golang Kafka - Start-up

        Client Server
        EC2A, City of London, EC2A 4EB
        £90000 - £110000 per annum + benefits
        Backend Software Engineer / Developer (Golang Kafka API) London / WFH to £110k Do you have a deep knowledge of Go / Golang combined with software architecture and design skills? You could be progressing your career as a Backend Software Engineer at a start-up payments technology company that is revolutionising the payments industry to Africa, improving speed, cost and reliability. As a Backend Software Engineer you'll focus on backend system design, event driven architecture and APIs with a focus on scalability and reliability. You'll join a small, collaborative, Agile team working on 2 week sprints, you'll be a key part of tech discussions and decision making. You'll join colleagues in the London, Canary Wharf offices three days a week (also the possibility to be remote in the UK).
        Backend Software Engineer / Developer (Golang Kafka API) London / WFH to £110k Do you have a deep knowledge of Go / Golang combined with software architecture and design skills? You could be progressing your career as a Backend Software Engineer at a start-up payments technology company that is revolutionising the payments industry to Africa, improving speed, cost and reliability. As a Backend Software Engineer you'll focus on backend system design, event driven architecture and APIs with a focus on scalability and reliability. You'll join a small, collaborative, Agile team working on 2 week sprints, you'll be a key part of tech discussions and decision making. You'll join colleagues in the London, Canary Wharf offices three days a week (also the possibility to be remote in the UK).
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        NEWPREMIUM
        Backend Software Engineer / Developer (Java Kotlin AWS API) Hybrid WFH to £110k Would you like to progress your career in an impactful hands-on Backend Software Engineer role working on Tech for Good? You could be joining a HealthTech Start-up, founded by two highly successful, Cambridge University educated management consultants, that is aiming to improve patient and social care for all by using complex technology to improve access to patient records, enabling collaboration between healthcare providers and improving nursing and medical care. As a Backend Software Engineer you will collaborate with the CTO on the overall design and architecture of the products' tech stack, working on Greenfield applications. The tech stack is based on Kotlin, SpringBoot and AWS backend with TypeScript, React and Next.js on the front end.
        Backend Software Engineer / Developer (Java Kotlin AWS API) Hybrid WFH to £110k Would you like to progress your career in an impactful hands-on Backend Software Engineer role working on Tech for Good? You could be joining a HealthTech Start-up, founded by two highly successful, Cambridge University educated management consultants, that is aiming to improve patient and social care for all by using complex technology to improve access to patient records, enabling collaboration between healthcare providers and improving nursing and medical care. As a Backend Software Engineer you will collaborate with the CTO on the overall design and architecture of the products' tech stack, working on Greenfield applications. The tech stack is based on Kotlin, SpringBoot and AWS backend with TypeScript, React and Next.js on the front end.
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        NEWPREMIUM
        Hybrid: Two days in our client's London office and three days working from home. On Monday morning, you might be refining an API connection between a collections database and a public-facing platform. By Wednesday, you could be writing a PHP 8.2 script to automate image processing for a new exhibition launch. Friday afternoon? Testing out an AI tool to help curators search archive materials faster. That’s the reality of life as a Backend Integration Developer here. No two weeks look the same. The mix of backend software development, systems integration, and cloud infrastructure work means you’ll constantly be learning, solving problems, and collaborating with colleagues from across the organisation. This is a fantastic opportunity for a technically adaptable developer to join a nationally respected cultural institution with an ambitious digital vision.
        Hybrid: Two days in our client's London office and three days working from home. On Monday morning, you might be refining an API connection between a collections database and a public-facing platform. By Wednesday, you could be writing a PHP 8.2 script to automate image processing for a new exhibition launch. Friday afternoon? Testing out an AI tool to help curators search archive materials faster. That’s the reality of life as a Backend Integration Developer here. No two weeks look the same. The mix of backend software development, systems integration, and cloud infrastructure work means you’ll constantly be learning, solving problems, and collaborating with colleagues from across the organisation. This is a fantastic opportunity for a technically adaptable developer to join a nationally respected cultural institution with an ambitious digital vision.
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        PREMIUM
        Hybrid: Two days in our client's London office and three days working from home. On Monday morning, you might be refining an API connection between a collections database and a public-facing platform. By Wednesday, you could be writing a PHP 8.2 script to automate image processing for a new exhibition launch. Friday afternoon? Testing out an AI tool to help curators search archive materials faster. That’s the reality of life as a Backend Integration Developer here. No two weeks look the same. The mix of backend software development, systems integration, and cloud infrastructure work means you’ll constantly be learning, solving problems, and collaborating with colleagues from across the organisation. This is a fantastic opportunity for a technically adaptable developer to join a nationally respected cultural institution with an ambitious digital vision.
        Hybrid: Two days in our client's London office and three days working from home. On Monday morning, you might be refining an API connection between a collections database and a public-facing platform. By Wednesday, you could be writing a PHP 8.2 script to automate image processing for a new exhibition launch. Friday afternoon? Testing out an AI tool to help curators search archive materials faster. That’s the reality of life as a Backend Integration Developer here. No two weeks look the same. The mix of backend software development, systems integration, and cloud infrastructure work means you’ll constantly be learning, solving problems, and collaborating with colleagues from across the organisation. This is a fantastic opportunity for a technically adaptable developer to join a nationally respected cultural institution with an ambitious digital vision.
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        NEWFEATURED
        Lead QA Engineer - Commodities / Trading Client - £120k + Extensive Benefits, London My Commodities Trading Client are looking for a Lead QA Engineer to join the growing team. This role is 3 days a week in London. * Identify and recommend requirements for STLC. * Design, execute, and report on QA process. * Drive sprint testing, creation of test cases, execution, and defect tracking. * Develop and maintain current Regression Pack. * Implement test automation using tools e.g ReadyAPI, SpecFlow, Playwright. C#. * Design and Build nonfunctional test suite. * Maintain heat maps * Collaborate with cross functional teams to ensure alignment and proper documentation. * Combine with the team to ensure an accurate test approach reflected in Jira stories. * Enhance Automation and Manual testing processes utilising the latest tools / techniques.
        Lead QA Engineer - Commodities / Trading Client - £120k + Extensive Benefits, London My Commodities Trading Client are looking for a Lead QA Engineer to join the growing team. This role is 3 days a week in London. * Identify and recommend requirements for STLC. * Design, execute, and report on QA process. * Drive sprint testing, creation of test cases, execution, and defect tracking. * Develop and maintain current Regression Pack. * Implement test automation using tools e.g ReadyAPI, SpecFlow, Playwright. C#. * Design and Build nonfunctional test suite. * Maintain heat maps * Collaborate with cross functional teams to ensure alignment and proper documentation. * Combine with the team to ensure an accurate test approach reflected in Jira stories. * Enhance Automation and Manual testing processes utilising the latest tools / techniques.
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        NEW
        Lead QA Engineer - Commodities / Trading Client - £120k + Extensive Benefits, London My Commodities Trading Client are looking for a Lead QA Engineer to join the growing team. This role is 3 days a week in London. * Identify and recommend requirements for STLC. * Design, execute, and report on QA process. * Drive sprint testing, creation of test cases, execution, and defect tracking. * Develop and maintain current Regression Pack. * Implement test automation using tools e.g ReadyAPI, SpecFlow, Playwright. C#. * Design and Build nonfunctional test suite. * Maintain heat maps * Collaborate with cross functional teams to ensure alignment and proper documentation. * Combine with the team to ensure an accurate test approach reflected in Jira stories. * Enhance Automation and Manual testing processes utilising the latest tools / techniques.
        Lead QA Engineer - Commodities / Trading Client - £120k + Extensive Benefits, London My Commodities Trading Client are looking for a Lead QA Engineer to join the growing team. This role is 3 days a week in London. * Identify and recommend requirements for STLC. * Design, execute, and report on QA process. * Drive sprint testing, creation of test cases, execution, and defect tracking. * Develop and maintain current Regression Pack. * Implement test automation using tools e.g ReadyAPI, SpecFlow, Playwright. C#. * Design and Build nonfunctional test suite. * Maintain heat maps * Collaborate with cross functional teams to ensure alignment and proper documentation. * Combine with the team to ensure an accurate test approach reflected in Jira stories. * Enhance Automation and Manual testing processes utilising the latest tools / techniques.
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        NEW

        .NET Developer

        Tech 4
        EC1, City of London
        From £60,000 to £70,000 per annum + excellent benefits
        An opportunity has arisen for an experienced Microsoft .Net Software Developer to join this organisation, and contribute to the development of its suite of systems, which are central to how they engage with their clients. Develop business applications for use within the business or by their clients. Provide technical enhancement for existing and new applications The successful candidate will have 3 or more years experience of application development. They will be well versed in structured programming, software testing and database optimisation. The candidate will have proven ability to understand a business requirement or process, and turn it into well written, well tested, documented and maintainable code.
        An opportunity has arisen for an experienced Microsoft .Net Software Developer to join this organisation, and contribute to the development of its suite of systems, which are central to how they engage with their clients. Develop business applications for use within the business or by their clients. Provide technical enhancement for existing and new applications The successful candidate will have 3 or more years experience of application development. They will be well versed in structured programming, software testing and database optimisation. The candidate will have proven ability to understand a business requirement or process, and turn it into well written, well tested, documented and maintainable code.
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        NEW
        MarTech Consultant Travel Sector Strategy & Delivery Location: London, UK (Hybrid 3 days onsite) Type: Permanent | Start: ASAP | About the Role Our client, a global leader in digital transformation, is seeking a Senior MarTech Consultant to lead strategy, architecture, and delivery of marketing technology solutions for a major travel-sector programme. This is a high-impact, client-facing role working at the intersection of customer data platforms, personalisation, and campaign automation, influencing board-level marketing decisions. You will partner with business and IT stakeholders to design customer 360 solutions, optimise data flows, and implement best-in-class MarTech integrations using platforms such as Braze, mParticle, Adobe, and Snowflake. Key Responsibilities
        MarTech Consultant Travel Sector Strategy & Delivery Location: London, UK (Hybrid 3 days onsite) Type: Permanent | Start: ASAP | About the Role Our client, a global leader in digital transformation, is seeking a Senior MarTech Consultant to lead strategy, architecture, and delivery of marketing technology solutions for a major travel-sector programme. This is a high-impact, client-facing role working at the intersection of customer data platforms, personalisation, and campaign automation, influencing board-level marketing decisions. You will partner with business and IT stakeholders to design customer 360 solutions, optimise data flows, and implement best-in-class MarTech integrations using platforms such as Braze, mParticle, Adobe, and Snowflake. Key Responsibilities
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        NEW

        Head of IT

        REC-REVOLUTION LTD
        SW19, South West London
        From £80,000 to £90,000 per annum Plus package
        Morleys Department Stores Group is a privately-owned department store group that operates 7 stores principally in greater London and Newbury, and an Ecommerce platform for our flagship store in Wimbledon. Our stores are at the heart of local communities and have centuries of heritage, brand trust and loyalty - all key to the values we bring to life in-store and through our communications. An opportunity has arisen for an experienced Head of Technology, based in head office in Wimbledon. Purpose of the Role To manage and develop the IT function of Morley Stores, ensuring all systems and IT processes within the business are secure, compliant, and aligned with the evolving needs of the group. This is a hands-on leadership role requiring technical expertise, operational experience, and strong project management capabilities. Position Profile & Role Summary
        Morleys Department Stores Group is a privately-owned department store group that operates 7 stores principally in greater London and Newbury, and an Ecommerce platform for our flagship store in Wimbledon. Our stores are at the heart of local communities and have centuries of heritage, brand trust and loyalty - all key to the values we bring to life in-store and through our communications. An opportunity has arisen for an experienced Head of Technology, based in head office in Wimbledon. Purpose of the Role To manage and develop the IT function of Morley Stores, ensuring all systems and IT processes within the business are secure, compliant, and aligned with the evolving needs of the group. This is a hands-on leadership role requiring technical expertise, operational experience, and strong project management capabilities. Position Profile & Role Summary
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        NEW
        6 Month Contract London (Hybrid) Rates: Negotiable Were partnering with a global trading organisation at the forefront of commodity markets, delivering high-performance solutions to support fast-paced, data-driven trading desks. This team builds and maintains cutting-edge tools that help traders make rapid, informed decisions in dynamic markets. The Role Were seeking a .NET Core / C# Developer with strong SQL Server skills to join a high-impact development team. Youll be embedded in a trading environment, working closely with end users to deliver robust, efficient, and scalable solutions. Key Responsibilities * Develop and maintain applications using .NET Core / C#, SQL Server * Work closely with traders, analysts, and other stakeholders to gather requirements and deliver rapid solutions
        6 Month Contract London (Hybrid) Rates: Negotiable Were partnering with a global trading organisation at the forefront of commodity markets, delivering high-performance solutions to support fast-paced, data-driven trading desks. This team builds and maintains cutting-edge tools that help traders make rapid, informed decisions in dynamic markets. The Role Were seeking a .NET Core / C# Developer with strong SQL Server skills to join a high-impact development team. Youll be embedded in a trading environment, working closely with end users to deliver robust, efficient, and scalable solutions. Key Responsibilities * Develop and maintain applications using .NET Core / C#, SQL Server * Work closely with traders, analysts, and other stakeholders to gather requirements and deliver rapid solutions
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        Full Stack Developer - React / Python London | Hybrid (2 days office and 3 days from home) £60K-£70K + Equity | Full-Time | Start-up We're a high-growth start-up building a leading healthcare! Looking for a Full Stack developer who loves working across the stack - React on the front end, Python on the back end. * Build responsive UIs in React * Develop APIs & services in Python (either Django/Flask/FastAPI) * Own features end-to-end * Help shape our tech stack * Strong React & Python skills * API & database experience * A proactive, problem-solving mindset * Ideally start-up or scale-up experience Why us? * Big impact from day one * Technical ownership & flexibility * Career growth + equity options Apply with your CV + GitHub Robert Half Ltd acts as an employment business for temporary positions and an employment agency for permanent positions.
        Full Stack Developer - React / Python London | Hybrid (2 days office and 3 days from home) £60K-£70K + Equity | Full-Time | Start-up We're a high-growth start-up building a leading healthcare! Looking for a Full Stack developer who loves working across the stack - React on the front end, Python on the back end. * Build responsive UIs in React * Develop APIs & services in Python (either Django/Flask/FastAPI) * Own features end-to-end * Help shape our tech stack * Strong React & Python skills * API & database experience * A proactive, problem-solving mindset * Ideally start-up or scale-up experience Why us? * Big impact from day one * Technical ownership & flexibility * Career growth + equity options Apply with your CV + GitHub Robert Half Ltd acts as an employment business for temporary positions and an employment agency for permanent positions.
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        Investran Application Specialist

        Cobalt Recruitment.
        City of London, London
        £75000.00 - £95000 per annum
        About the Company You'll be joining a global fund administrator with deep roots in private equity and a culture grounded in collaboration, integrity, and professional growth. Their technology function is embedded in strategic decision-making, and you'll have the autonomy and visibility to truly influence outcomes. * Maintain and enhance the Investran platform to support day-to-day operations and long-term scalability. * Build and manage integrations between Investran and other enterprise tools to ensure data accuracy and automation. * Lead technical troubleshooting, upgrades, and documentation to reduce downtime and support business continuity. * Translate operational needs into system improvements by working directly with internal stakeholders. * Extract and prepare data for analysis, reporting, and audits, driving better business decisions.
        About the Company You'll be joining a global fund administrator with deep roots in private equity and a culture grounded in collaboration, integrity, and professional growth. Their technology function is embedded in strategic decision-making, and you'll have the autonomy and visibility to truly influence outcomes. * Maintain and enhance the Investran platform to support day-to-day operations and long-term scalability. * Build and manage integrations between Investran and other enterprise tools to ensure data accuracy and automation. * Lead technical troubleshooting, upgrades, and documentation to reduce downtime and support business continuity. * Translate operational needs into system improvements by working directly with internal stakeholders. * Extract and prepare data for analysis, reporting, and audits, driving better business decisions.
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        NEW

        Backend Engineer

        Plexus Resource Solutions Ltd
        EC1, City of London
        From £100,000 to £130,000 per annum
        Remote £100k - £130k Plexus has another great opportunity with one of our long-term clients. They believe that using crypto can enable a more equitable system for creators, fundamentally rediscovering the power of the internet. They are looking for a Backend Engineer to join one of their core product engineering teams with the ability to directly impact millions of user experiences in how they interactive with our products. * Work with team to build out new features in the product. * Build and maintain an API used by the product as well as external partners. * Communicate status, updates, blockers, etc., to cross functional stakeholders. * Participate in RFC and code review. * 3+ years of experience as an engineer. * Technical background in Python, GraphQL, and MongoDB. * Comfortable in moving across the stack when needed (Typescript/React/Next/Solidity)
        Remote £100k - £130k Plexus has another great opportunity with one of our long-term clients. They believe that using crypto can enable a more equitable system for creators, fundamentally rediscovering the power of the internet. They are looking for a Backend Engineer to join one of their core product engineering teams with the ability to directly impact millions of user experiences in how they interactive with our products. * Work with team to build out new features in the product. * Build and maintain an API used by the product as well as external partners. * Communicate status, updates, blockers, etc., to cross functional stakeholders. * Participate in RFC and code review. * 3+ years of experience as an engineer. * Technical background in Python, GraphQL, and MongoDB. * Comfortable in moving across the stack when needed (Typescript/React/Next/Solidity)
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        NEW
        London (Hybrid) Salary Up to £120,000 + Equity Method Resourcing have proudly partnered with a cutting-edge health & fitness tech company that's transforming the way people train - and they're looking for an Engineering Lead to join the team and play a pivotal role in driving technical success. We're looking for a hands-on technical leader to partner with cross-functional product teams, shape the architecture of the mobile ecosystem, raise the bar for engineering quality, and drive the delivery of innovative features across iOS (React Native), Android (React Native), Apple Watch, and third-party integrations. * Set the technical direction - Shape the architecture and long-term tech vision across multiple product teams, building solutions that are scalable, secure, and built to last.
        London (Hybrid) Salary Up to £120,000 + Equity Method Resourcing have proudly partnered with a cutting-edge health & fitness tech company that's transforming the way people train - and they're looking for an Engineering Lead to join the team and play a pivotal role in driving technical success. We're looking for a hands-on technical leader to partner with cross-functional product teams, shape the architecture of the mobile ecosystem, raise the bar for engineering quality, and drive the delivery of innovative features across iOS (React Native), Android (React Native), Apple Watch, and third-party integrations. * Set the technical direction - Shape the architecture and long-term tech vision across multiple product teams, building solutions that are scalable, secure, and built to last.
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        FEATURED
        Digital Transformation Manager - Low Code Development and Data Engineering - Full time permanent role - Hybrid (West London 3 days a week) - Salary up to £70,000 plus 25 days holiday and travel paid A successful West London business is currently looking for an experienced Digital Transformation Manager to join its IT function. This exciting new role will focus on the design and development of low code applications as well as data warehouses/pipelines. - Leading on the design and implementation of low-code applications across the Microsoft Power Platform - Improving efficiency through automating solutions - Driving AI strategy - Oversee system enhancements and API integrations - Oversee data engineering process - ETL/ELT pipelines with Azure Data Factory - Drive development of Snowflake Data Warehouse - Team management and leading Data Engineers/Developers
        Digital Transformation Manager - Low Code Development and Data Engineering - Full time permanent role - Hybrid (West London 3 days a week) - Salary up to £70,000 plus 25 days holiday and travel paid A successful West London business is currently looking for an experienced Digital Transformation Manager to join its IT function. This exciting new role will focus on the design and development of low code applications as well as data warehouses/pipelines. - Leading on the design and implementation of low-code applications across the Microsoft Power Platform - Improving efficiency through automating solutions - Driving AI strategy - Oversee system enhancements and API integrations - Oversee data engineering process - ETL/ELT pipelines with Azure Data Factory - Drive development of Snowflake Data Warehouse - Team management and leading Data Engineers/Developers
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        FEATURED
        Full Stack Engineer / Developer (JavaScript TypeScript) WFH / London to £75k Opportunity to progress your career as a Full Stack Developer working on Tech for Good application for the healthcare sector that utilises AI and Machine Learning techniques to help prevent patients from experiencing health crisis. As a Full Stack Engineer you'll collaborate with a small team working on internal tools and data platforms, with a focus on implementing robust security practices and scalable architectures. You'll use a range of technology, primarily JavaScript on the backend and TypeScript on the frontend, you'll build secure, responsive user interfaces, implement RESTful APIs, optimise database queries for performance and ensure solutions are highly scalable and maintainable. This is a great opportunity to join a scaling start-up in a role that you can shape and influence.
        Full Stack Engineer / Developer (JavaScript TypeScript) WFH / London to £75k Opportunity to progress your career as a Full Stack Developer working on Tech for Good application for the healthcare sector that utilises AI and Machine Learning techniques to help prevent patients from experiencing health crisis. As a Full Stack Engineer you'll collaborate with a small team working on internal tools and data platforms, with a focus on implementing robust security practices and scalable architectures. You'll use a range of technology, primarily JavaScript on the backend and TypeScript on the frontend, you'll build secure, responsive user interfaces, implement RESTful APIs, optimise database queries for performance and ensure solutions are highly scalable and maintainable. This is a great opportunity to join a scaling start-up in a role that you can shape and influence.
        more
        NEWPREMIUM

        Applications Support Analyst

        Kudos Partners
        Datchet Common, SL3
        £70,000 per annum plus 12% bonus - generous benefits package
        Location:West of London | Hybrid (1 day in office) Salary:Competitive + Benefits + Flexible Working Why Join? * Hybrid working only 1 day per week in the office * Established FinTech company with a collaborative, supportive culture * Key role in supporting high-profile web and mobile applications (including BigCommerce) * Exposure to Azure, APIs, D365, and cutting-edge digital solutions Were seeking anexperienced Applications Support Analystto join our growing FinTech team. Thisbusiness-criticalrole will lead the support for a new digital platform, ensuring smooth operation and exceptional service for internal stakeholders. * Deliver 2nd and 3rd line support for digital applications, resolving issues within SLAs * Minimise downtime and drive continuous improvement across web/mobile platforms
        Location:West of London | Hybrid (1 day in office) Salary:Competitive + Benefits + Flexible Working Why Join? * Hybrid working only 1 day per week in the office * Established FinTech company with a collaborative, supportive culture * Key role in supporting high-profile web and mobile applications (including BigCommerce) * Exposure to Azure, APIs, D365, and cutting-edge digital solutions Were seeking anexperienced Applications Support Analystto join our growing FinTech team. Thisbusiness-criticalrole will lead the support for a new digital platform, ensuring smooth operation and exceptional service for internal stakeholders. * Deliver 2nd and 3rd line support for digital applications, resolving issues within SLAs * Minimise downtime and drive continuous improvement across web/mobile platforms
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        AI Solutions Engineer - London

        Transparent Technology
        London, EC1A 4RN
        £70000 - £140000 per annum + + bens + shares
        Applied AI Engineer / Senior AI Engineer | £70k-£140k + Benefits + Shares | London (Hybrid, 3 Days/Week) Full Stack AI Engineer is required by a leading AI consultancy, one of only 4 businesses Globally who are partnered with OpenAI. Working at the forefront of Generative AI, this role is ideal for Applied AI Engineers who thrive in fast-paced environments and want to help shape the next generation of AI applications for well-known brands. From sports broadcasters to Tier 1 banks. * Proven ability to develop and deploy end-to-end, scalable AI solutions using Python programming * Solid understanding of microservices architecture, CI/CD (Github Actions) and data pipelines powering AI-driven applications * Deep knowledge of LLMs, fine-tuning, prompting, RAG and Agentic frameworks. Especially integration with the OpenAI API GPT, Gemini, LLama, Claude etc.
        Applied AI Engineer / Senior AI Engineer | £70k-£140k + Benefits + Shares | London (Hybrid, 3 Days/Week) Full Stack AI Engineer is required by a leading AI consultancy, one of only 4 businesses Globally who are partnered with OpenAI. Working at the forefront of Generative AI, this role is ideal for Applied AI Engineers who thrive in fast-paced environments and want to help shape the next generation of AI applications for well-known brands. From sports broadcasters to Tier 1 banks. * Proven ability to develop and deploy end-to-end, scalable AI solutions using Python programming * Solid understanding of microservices architecture, CI/CD (Github Actions) and data pipelines powering AI-driven applications * Deep knowledge of LLMs, fine-tuning, prompting, RAG and Agentic frameworks. Especially integration with the OpenAI API GPT, Gemini, LLama, Claude etc.
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        NEW

        Python Software Engineer

        Henderson Scott
        London
        £630 - £640 per day + Umbrella rate - inside IR35
        Contract Backend Developer - Python/Go - SC Cleared - Remote - 6 Months Rate: Competitive (Outside IR35) Location: Remote/Hybrid (UK-based only) - 1-2 days per month in London Clearance: Active SC Clearance required Duration: 6 months (possible extension) A leading consultancy is seeking a Backend Developer with strong experience in Python and Go for a secure infrastructure automation project. * Python & Go backend development (APIs, microservices, automation tools) * AWS SDKs (boto3, aws-sdk-go-v2) - EC2, S3, IAM, Lambda, CloudWatch * LDAP, HashiCorp Vault, JIRA/Confluence, Kubernetes integration * CI/CD pipelines, Git, testing frameworks (pytest, unittest, testify, gomock) * Code quality tools: flake8, black, mypy, golangci-lint * Proven experience in backend development and cloud automation * Strong integration skills with enterprise tools and services
        Contract Backend Developer - Python/Go - SC Cleared - Remote - 6 Months Rate: Competitive (Outside IR35) Location: Remote/Hybrid (UK-based only) - 1-2 days per month in London Clearance: Active SC Clearance required Duration: 6 months (possible extension) A leading consultancy is seeking a Backend Developer with strong experience in Python and Go for a secure infrastructure automation project. * Python & Go backend development (APIs, microservices, automation tools) * AWS SDKs (boto3, aws-sdk-go-v2) - EC2, S3, IAM, Lambda, CloudWatch * LDAP, HashiCorp Vault, JIRA/Confluence, Kubernetes integration * CI/CD pipelines, Git, testing frameworks (pytest, unittest, testify, gomock) * Code quality tools: flake8, black, mypy, golangci-lint * Proven experience in backend development and cloud automation * Strong integration skills with enterprise tools and services
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        FEATURED
        Have the digital world at your feet As an Engineering Technical Lead at the FA, you will be responsible for leading the software engineers within your Pod (Team/Value stream). You will be key in ensuring your Pod builds the right thing in the right way. This is a technical leadership role responsible for the end-to-end development of a suite of FA applications. Working primarily within a Microsoft-based technology stack, the role serves as the central point for all development activities. Key responsibilities include establishing coding standards, implementing quality assurance processes, and overseeing the work of developers. The ideal candidate will wear multiple hats-acting as an architect, delivery manager, engineer, quality assurance, mentor, problem solver, and collaborative team member-ensuring both technical excellence and alignment with business goals.
        Have the digital world at your feet As an Engineering Technical Lead at the FA, you will be responsible for leading the software engineers within your Pod (Team/Value stream). You will be key in ensuring your Pod builds the right thing in the right way. This is a technical leadership role responsible for the end-to-end development of a suite of FA applications. Working primarily within a Microsoft-based technology stack, the role serves as the central point for all development activities. Key responsibilities include establishing coding standards, implementing quality assurance processes, and overseeing the work of developers. The ideal candidate will wear multiple hats-acting as an architect, delivery manager, engineer, quality assurance, mentor, problem solver, and collaborative team member-ensuring both technical excellence and alignment with business goals.
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        Front End Developer - Must have an Active DV Clearance - Hybrid Location: Bristol, London, Manchester or Cambridge Salary: £70,000 - £120,000 (depending on experience) We're looking for a skilled and motivated Front End Developer to help deliver modern, user-focused digital services for clients in the Defence sector. This is an exciting opportunity to join a multi-disciplinary team transforming the way Defence users interact with critical systems. You'll work closely with designers, UX specialists, back-end developers and stakeholders to bring ideas to life through intuitive and responsive interfaces. You'll be key to developing new applications, optimising performance, and shaping the digital journey from prototype through to production. * Building responsive, high-quality web applications and user interfaces using HTML, CSS and JavaScript
        Front End Developer - Must have an Active DV Clearance - Hybrid Location: Bristol, London, Manchester or Cambridge Salary: £70,000 - £120,000 (depending on experience) We're looking for a skilled and motivated Front End Developer to help deliver modern, user-focused digital services for clients in the Defence sector. This is an exciting opportunity to join a multi-disciplinary team transforming the way Defence users interact with critical systems. You'll work closely with designers, UX specialists, back-end developers and stakeholders to bring ideas to life through intuitive and responsive interfaces. You'll be key to developing new applications, optimising performance, and shaping the digital journey from prototype through to production. * Building responsive, high-quality web applications and user interfaces using HTML, CSS and JavaScript
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        PREMIUM

        Front End Engineer React - Hedge Fund

        Client Server
        Victoria, SW1
        £70000 - £95000 per annum + bonus + benefits
        Front End Engineer / Developer (React v19 TypeScript) London / WFH to £95k Are you a Front End technologist looking for an opportunity to progress your career in a hands-on role with lots of learning opportunities? You could be joining a Hedge Fund with complex work and substantial bonus earning potential. As a Front End Engineer you'll join a globally distributed team to develop engaging and simple user interfaces across all internal business systems. You'll collaborate with UX and Product teams, actively participating in all stages of a project, through product design, development, implementation, testing and maintenance. You'll join colleagues in the impressive Central London office with flexibility to work from home twice a week. * You have strong Front End development skills with React (they're using v19) and TypeScript
        Front End Engineer / Developer (React v19 TypeScript) London / WFH to £95k Are you a Front End technologist looking for an opportunity to progress your career in a hands-on role with lots of learning opportunities? You could be joining a Hedge Fund with complex work and substantial bonus earning potential. As a Front End Engineer you'll join a globally distributed team to develop engaging and simple user interfaces across all internal business systems. You'll collaborate with UX and Product teams, actively participating in all stages of a project, through product design, development, implementation, testing and maintenance. You'll join colleagues in the impressive Central London office with flexibility to work from home twice a week. * You have strong Front End development skills with React (they're using v19) and TypeScript
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        NEWPREMIUM
        Job Role:Senior Full-Stack PHP Developer Working Hours:5 days per week Job Type:Permanent Salary:£70,000 - £85,000 depending on experience Location:London Remote: 4 days remote - 1 day on-site in London office - Postcode NW6 About the Company Our client is a rapidly growing platform that connects individuals with industry professionals for special events. By offering unique opportunities, the platform allows professionals in the field to achieve higher earnings while enjoying enhanced flexibility and a better work-life balance. Role Overview This is an exciting opportunity to join a high-growth, early-stage startup. As a Full-Stack Developer, youll work closely with the founders and engineers in a tight-knit, London-based team. Youll have a direct impact on the companys expansion into new international markets, shaping the future of the business.
        Job Role:Senior Full-Stack PHP Developer Working Hours:5 days per week Job Type:Permanent Salary:£70,000 - £85,000 depending on experience Location:London Remote: 4 days remote - 1 day on-site in London office - Postcode NW6 About the Company Our client is a rapidly growing platform that connects individuals with industry professionals for special events. By offering unique opportunities, the platform allows professionals in the field to achieve higher earnings while enjoying enhanced flexibility and a better work-life balance. Role Overview This is an exciting opportunity to join a high-growth, early-stage startup. As a Full-Stack Developer, youll work closely with the founders and engineers in a tight-knit, London-based team. Youll have a direct impact on the companys expansion into new international markets, shaping the future of the business.
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        NEW

        Senior Salesforce Developer

        167 Solutions Ltd
        SW1, South West London
        From £75,000 to £90,000 per annum
        Senior Salesforce Consultant / Senior Salesforce Developer / Senior Salesforce Programmer Location: Hybrid (London / UK 23 days onsite) Salary: £75,000 - £90,000 Plus Benefits We are hiring on behalf of our client for a Senior Salesforce Consultant to play a key role in an exciting organisation-wide Salesforce transformation. This role offers the opportunity to work across Sales Cloud, Service Cloud, Experience Cloud, and Marketing Cloud in a collaborative hybrid environment. Key Responsibilities * Lead end-to-end delivery across Sales Cloud, Service Cloud, Experience Cloud, and Marketing Cloud, from requirements gathering and solution design to configuration, development, testing, and deployment. * Deliver technical solutions in Salesforce including custom metadata, Lightning components, Apex code, APIs, and declarative automation.
        Senior Salesforce Consultant / Senior Salesforce Developer / Senior Salesforce Programmer Location: Hybrid (London / UK 23 days onsite) Salary: £75,000 - £90,000 Plus Benefits We are hiring on behalf of our client for a Senior Salesforce Consultant to play a key role in an exciting organisation-wide Salesforce transformation. This role offers the opportunity to work across Sales Cloud, Service Cloud, Experience Cloud, and Marketing Cloud in a collaborative hybrid environment. Key Responsibilities * Lead end-to-end delivery across Sales Cloud, Service Cloud, Experience Cloud, and Marketing Cloud, from requirements gathering and solution design to configuration, development, testing, and deployment. * Deliver technical solutions in Salesforce including custom metadata, Lightning components, Apex code, APIs, and declarative automation.
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        What is the average salary for API in London?

        Average salary per year
        £72,499

        The average salary for a API in London is £72,499. API in London salaries range from £62,499 to £87,499.

        Frequently Asked Questions

        How many temporary API jobs are there in London?
        There are 132 temporary API jobs within 20 miles of London available on Jobsite right now.

        Where in London are these temporary jobs?
        You can find temporary jobs in City of London, Central London, West End.

        What other similar jobs are there to temporary API jobs in London?
        As well as temporary API jobs in London, you can find temporary IT, Software Development, Management, amongst many others.