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        209 Temporary API jobs in London + 20 miles

        Software Engineer, Developer Experience - WhatsApp

        Meta
        London
        Competitive
        Meta is seeking engineers to join our teams in building cutting-edge products that connect billions of people around the world. As a member of our team, you will have the opportunity to work on complex technical problems, build new features, and improve existing products across various platforms, including mobile devices and web applications. Our teams are constantly pushing the boundaries of user experience, and we're looking for individuals who can help us advance the way people connect globally. If you're interested in joining a world-class team of industry veterans and working on exciting projects that have a significant impact, we encourage you to apply. * Collaborate with cross-functional teams (product, design, operations, infrastructure) to build innovative application experiences
        Meta is seeking engineers to join our teams in building cutting-edge products that connect billions of people around the world. As a member of our team, you will have the opportunity to work on complex technical problems, build new features, and improve existing products across various platforms, including mobile devices and web applications. Our teams are constantly pushing the boundaries of user experience, and we're looking for individuals who can help us advance the way people connect globally. If you're interested in joining a world-class team of industry veterans and working on exciting projects that have a significant impact, we encourage you to apply. * Collaborate with cross-functional teams (product, design, operations, infrastructure) to build innovative application experiences
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        NEW

        Software Engineering Lead Java AI - FinTech

        Client Server
        Shoreditch, East London (E1), EC2A
        £120000 - £140000 per annum + bonus + benefits
        Software Engineering Lead (Java AI) London / WFH to £140k Are you a technical leader with a strong knowledge of AI and its practical uses within software engineering? You could be progressing your career in a senior, hands-on Engineering Manager role at a global FinTech / CFD trading company that has been consistently voted as one of the UKs top employers. As a Software Engineering Lead you'll head up a team of nine Software Engineers whilst remaining hands-on with coding. Your primary focus will be on using Claude code (and other AI tools and frameworks) throughout the development lifecycle from initial requirements shaping through to deployment to improve speed and efficiency of software development and release.
        Software Engineering Lead (Java AI) London / WFH to £140k Are you a technical leader with a strong knowledge of AI and its practical uses within software engineering? You could be progressing your career in a senior, hands-on Engineering Manager role at a global FinTech / CFD trading company that has been consistently voted as one of the UKs top employers. As a Software Engineering Lead you'll head up a team of nine Software Engineers whilst remaining hands-on with coding. Your primary focus will be on using Claude code (and other AI tools and frameworks) throughout the development lifecycle from initial requirements shaping through to deployment to improve speed and efficiency of software development and release.
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        PREMIUM
        Hybrid: London (1-2 days per week in the office) Paying up to £70,000 + benefits Permanent Experis are delighted to be supporting a well-established and reputable organisation as they continue to strengthen and modernise their digital client-facing capabilities. We are assisting them in the search for a Seismic Developer, a key role within the Brand & Digital Services division, responsible for designing and developing advanced Seismic LiveDoc solutions that enhance client experience, streamline document creation, and enable front-office teams to work more efficiently. This is a fantastic opportunity for someone with deep Seismic expertise who enjoys building automated, scalable, and visually polished documentation solutions.
        Hybrid: London (1-2 days per week in the office) Paying up to £70,000 + benefits Permanent Experis are delighted to be supporting a well-established and reputable organisation as they continue to strengthen and modernise their digital client-facing capabilities. We are assisting them in the search for a Seismic Developer, a key role within the Brand & Digital Services division, responsible for designing and developing advanced Seismic LiveDoc solutions that enhance client experience, streamline document creation, and enable front-office teams to work more efficiently. This is a fantastic opportunity for someone with deep Seismic expertise who enjoys building automated, scalable, and visually polished documentation solutions.
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        FEATURED

        React Developer TypeScript - Hedge Fund

        Client Server
        Victoria, South West London (SW1), SW1H
        £80000 - £95000 per annum + bonus + benefits
        React Developer / Front End Engineer (React v19 TypeScript) London / WFH to £95k Do you have expertise with React? You could be progressing your career at a Hedge Fund with complex work and substantial bonus earning potential. As a React Developer 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 * You are experienced with other web technologies such as HTML, CSS, Web APIs
        React Developer / Front End Engineer (React v19 TypeScript) London / WFH to £95k Do you have expertise with React? You could be progressing your career at a Hedge Fund with complex work and substantial bonus earning potential. As a React Developer 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 * You are experienced with other web technologies such as HTML, CSS, Web APIs
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        PREMIUM

        Palantir Consultant

        Staffworx Limited
        Central London (W1)
        excellent package to attract the best
        Palantir Foundry Consultant You'll work as a hands-on Palantir Foundry consultant, helping to design, build and support data and application workflows on the platform. You'll work closely with senior Foundry engineers and architects, contribute to technical decisions, and collaborate directly with business stakeholders as you grow into owning areas end-to-end. Core Responsibilities Foundry Solution Delivery o Data integration (Pipeline Builder/code-based pipelines, connectors, incremental loads). o Ontology modelling (objects, relationships, basic semantics, versioning). o Application layer (Workshop, Code Repositories, OSDK/APIs, Actions, AIP/agentic workflows). * Implement data modelling and transformation patterns under guidance from senior team members.
        Palantir Foundry Consultant You'll work as a hands-on Palantir Foundry consultant, helping to design, build and support data and application workflows on the platform. You'll work closely with senior Foundry engineers and architects, contribute to technical decisions, and collaborate directly with business stakeholders as you grow into owning areas end-to-end. Core Responsibilities Foundry Solution Delivery o Data integration (Pipeline Builder/code-based pipelines, connectors, incremental loads). o Ontology modelling (objects, relationships, basic semantics, versioning). o Application layer (Workshop, Code Repositories, OSDK/APIs, Actions, AIP/agentic workflows). * Implement data modelling and transformation patterns under guidance from senior team members.
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        Front Office Developer - Technical Team Lead

        CMC Markets UK Plc
        The City, City of London (EC3), EC3A 7BX
        Competitive Salary + Bonus, Pension, Private Health, Life Assurance
        We are now looking for a talented team-oriented developer who thrives in a collaborative environment, enjoys solving complex technical challenges, and wants to make an impact in a fast-paced, global setting. Join our Pricing & Risk team, working on our front-office pricing and trading platform. This is a hands-on role focused on building and maintaining distributed backend systems that support our market-making business across multiple asset classes including Equities, FX, Crypto, and Commodities. * Design, develop, and maintain backend infrastructure, microservices, APIs, and business logic for our pricing and trading systems. * Partner with front-end developers, quants, and front-office users to deliver efficient, scalable, and high-performance solutions.
        We are now looking for a talented team-oriented developer who thrives in a collaborative environment, enjoys solving complex technical challenges, and wants to make an impact in a fast-paced, global setting. Join our Pricing & Risk team, working on our front-office pricing and trading platform. This is a hands-on role focused on building and maintaining distributed backend systems that support our market-making business across multiple asset classes including Equities, FX, Crypto, and Commodities. * Design, develop, and maintain backend infrastructure, microservices, APIs, and business logic for our pricing and trading systems. * Partner with front-end developers, quants, and front-office users to deliver efficient, scalable, and high-performance solutions.
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        FEATURED

        Software Developer In Test

        G.R.E. Recruitment Limited
        Epsom (KT19)
        From £50,000 to £60,000 per annum
        G.R.E. Recruitment Limited is delighted to partner yet again with an Award-Winning UK based FinTech Company who are looking to add a Software Developer in Test to their development team reporting to the Engineering Manager who G.R.E. Recruitment recently placed with them. For this SDET Role I am looking for someone with a Java coding background along with experience of automated and manual testing. You should have experience of building or maintaining automation frameworks using tools such as Selenium, Playwright, Cypress and JUnit/TestNG. Along with this you should also have hands on experience with API testing tools (e.g., Postman, REST Assured) and performance tools (e.g., JMeter, Gatling). You'll be joining a team of 6 engineers and leveraging cloud services and third party software to accelerate platform development where appropriate. No Sponsorship Available.
        G.R.E. Recruitment Limited is delighted to partner yet again with an Award-Winning UK based FinTech Company who are looking to add a Software Developer in Test to their development team reporting to the Engineering Manager who G.R.E. Recruitment recently placed with them. For this SDET Role I am looking for someone with a Java coding background along with experience of automated and manual testing. You should have experience of building or maintaining automation frameworks using tools such as Selenium, Playwright, Cypress and JUnit/TestNG. Along with this you should also have hands on experience with API testing tools (e.g., Postman, REST Assured) and performance tools (e.g., JMeter, Gatling). You'll be joining a team of 6 engineers and leveraging cloud services and third party software to accelerate platform development where appropriate. No Sponsorship Available.
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        NEW
        MuleSoft Architect (SC Clearable) Location: London (Hybrid 2 days onsite) Employment Type: Permanent Security Clearance: Eligible for SC Clearance (UK) We are hiring an experienced MuleSoft Architect to join a growing integration practice supporting UK public sector and enterprise clients. This is a permanent role within a consultancy environment, where architects are not tied to a single project but work flexibly across multiple engagements as client needs evolve. You will play a key role in shaping high-level integration architecture, leading solution design, and ensuring delivery of secure, scalable MuleSoft implementations. * Own and design end-to-end MuleSoft integration architectures across multiple client programmes * Define and govern API-led connectivity and enterprise integration patterns
        MuleSoft Architect (SC Clearable) Location: London (Hybrid 2 days onsite) Employment Type: Permanent Security Clearance: Eligible for SC Clearance (UK) We are hiring an experienced MuleSoft Architect to join a growing integration practice supporting UK public sector and enterprise clients. This is a permanent role within a consultancy environment, where architects are not tied to a single project but work flexibly across multiple engagements as client needs evolve. You will play a key role in shaping high-level integration architecture, leading solution design, and ensuring delivery of secure, scalable MuleSoft implementations. * Own and design end-to-end MuleSoft integration architectures across multiple client programmes * Define and govern API-led connectivity and enterprise integration patterns
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        NEWFEATURED

        Mid-Level Java Developer

        G.R.E. Recruitment Limited
        Epsom (KT19)
        From £50,000 to £60,000 per annum
        G.R.E. Recruitment Limited is delighted to partner yet again with an Award-Winning UK based FinTech Company who are looking to add a Mid-Level Java Developer to their development team reporting to the Engineering Manager who G.R.E. Recruitment recently placed with them. I am looking for a Mid-Level Java Developer with 3-5 years experience. In this role you'll be helping to migrate a legacy system into newer microservices based architecture so similar experience of breaking down monolith systems would be ideal. This role is purely a backend development role. The core tech stack is: Java 8+, Spring MVC, SpringBoot, REST API's and using build tools such as Maven/Gradle. You'll be an advocate of best engineering principles (SOLID), ensuring you're writing clean code and optimizing performance and scalability.
        G.R.E. Recruitment Limited is delighted to partner yet again with an Award-Winning UK based FinTech Company who are looking to add a Mid-Level Java Developer to their development team reporting to the Engineering Manager who G.R.E. Recruitment recently placed with them. I am looking for a Mid-Level Java Developer with 3-5 years experience. In this role you'll be helping to migrate a legacy system into newer microservices based architecture so similar experience of breaking down monolith systems would be ideal. This role is purely a backend development role. The core tech stack is: Java 8+, Spring MVC, SpringBoot, REST API's and using build tools such as Maven/Gradle. You'll be an advocate of best engineering principles (SOLID), ensuring you're writing clean code and optimizing performance and scalability.
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        NEW
        Location/s: London Recruiter contact: Nikki George Mott MacDonald is a global engineering, management, and development consultancy with over 20,000 employees across more than 50 countries and 140+ offices. We work across incredible global industries, delivering exciting work that is defining our future and making an important societal impact in the communities we serve. Our people power our performance we succeed when they do. With countless opportunities to collaborate, learn, and grow, the possibilities for excellence are as varied as every individual. Whether you want to grow as a subject matter expert or broaden your experience with roles across our international community, youre surrounded by global specialists who want to combine their expertise and champion you to be your best.
        Location/s: London Recruiter contact: Nikki George Mott MacDonald is a global engineering, management, and development consultancy with over 20,000 employees across more than 50 countries and 140+ offices. We work across incredible global industries, delivering exciting work that is defining our future and making an important societal impact in the communities we serve. Our people power our performance we succeed when they do. With countless opportunities to collaborate, learn, and grow, the possibilities for excellence are as varied as every individual. Whether you want to grow as a subject matter expert or broaden your experience with roles across our international community, youre surrounded by global specialists who want to combine their expertise and champion you to be your best.
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        Founding Full Stack Engineer (Python/TypeScript) – London - £180K

        Halian Technology Limited
        London
        Up to £185,000 per annum High founding member equity and Shares
        Halian is currently working with a stealth-stage AI startup is hiring its first technical team member. If you want to build core AI systems from the ground up and move faster than a typical tech organisation ever allows, this might be for you. What youll be doing Architect core infrastructure and data pipelines Build integrations with external APIs and providers Develop internal tooling and contribute directly to product roadmap decisions Work across backend, frontend, data, and cloud systems Solve high-impact problems (including the ones we havent discovered yet) Tech youll work with Python + TypeScript/Node.js (in equal measure) API integrations, ETL, schema validation React/TypeScript, Supabase, AWS Data quality systems and pipeline tooling Whatever the mission requires we optimise for impact, not rigidity What matters most Ownership: You think like a founder.
        Halian is currently working with a stealth-stage AI startup is hiring its first technical team member. If you want to build core AI systems from the ground up and move faster than a typical tech organisation ever allows, this might be for you. What youll be doing Architect core infrastructure and data pipelines Build integrations with external APIs and providers Develop internal tooling and contribute directly to product roadmap decisions Work across backend, frontend, data, and cloud systems Solve high-impact problems (including the ones we havent discovered yet) Tech youll work with Python + TypeScript/Node.js (in equal measure) API integrations, ETL, schema validation React/TypeScript, Supabase, AWS Data quality systems and pipeline tooling Whatever the mission requires we optimise for impact, not rigidity What matters most Ownership: You think like a founder.
        more
        Pantheon has been at the forefront of private markets investing for more than 40 years, earning a reputation for providing innovative solutions covering the full lifecycle of investments, from primary fund commitments to co-investments and secondary purchases, across private equity, real assets and private credit. We have partnered with more than 650 clients, including institutional investors of all sizes as well as a growing number of private wealth advisers and investors, with approximately $65bn in discretionary assets under management (as of December 31, 2023). Leveraging our specialized experience and global team of professionals across Europe, the Americas and Asia, we invest with purpose and lead with expertise to build secure financial futures. For further details please visit Purpose of Position
        Pantheon has been at the forefront of private markets investing for more than 40 years, earning a reputation for providing innovative solutions covering the full lifecycle of investments, from primary fund commitments to co-investments and secondary purchases, across private equity, real assets and private credit. We have partnered with more than 650 clients, including institutional investors of all sizes as well as a growing number of private wealth advisers and investors, with approximately $65bn in discretionary assets under management (as of December 31, 2023). Leveraging our specialized experience and global team of professionals across Europe, the Americas and Asia, we invest with purpose and lead with expertise to build secure financial futures. For further details please visit Purpose of Position
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        Senior Backend Engineer

        Plexus Resource Solutions Ltd
        City of London (EC1)
        Unspecified
        DeFi Remote Up to $250k Plexus has another great opportunity with one of our clients that are a non-custodial crypto trading and data platform built for speed, accuracy, and full user control. They provide a unified base of operations where traders keep custody of their funds, access live market data, execute instantly, and trade even the newest markets with powerful, intuitive tools. they keep there team intentionally small, bringing together only the most exceptional talent in crypto. They are looking for a backend engineer experienced in building high-performance, low-latency microservices in TypeScript. Responsibilities * Backend Development: Build and maintain scalable TypeScript services for trading, analytics, and integrations. * Cross-Team Collaboration: Work with designers, product, and users to align backend solutions with platform needs.
        DeFi Remote Up to $250k Plexus has another great opportunity with one of our clients that are a non-custodial crypto trading and data platform built for speed, accuracy, and full user control. They provide a unified base of operations where traders keep custody of their funds, access live market data, execute instantly, and trade even the newest markets with powerful, intuitive tools. they keep there team intentionally small, bringing together only the most exceptional talent in crypto. They are looking for a backend engineer experienced in building high-performance, low-latency microservices in TypeScript. Responsibilities * Backend Development: Build and maintain scalable TypeScript services for trading, analytics, and integrations. * Cross-Team Collaboration: Work with designers, product, and users to align backend solutions with platform needs.
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        Our Purpose Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, were helping build a sustainable economy where everyone can prosper. We support a wide range of digital payments choices, making transactions secure, simple, smart and accessible. Our technology and innovation, partnerships and networks combine to deliver a unique set of products and services that help people, businesses and governments realize their greatest potential. Title and Summary Mastercard is a global technology company in the payments industry, connecting billions of consumers, financial institutions, merchants, governments, and businesses worldwide. We are driving the future of commerce by enabling secure, simple, and smart transactions.
        Our Purpose Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, were helping build a sustainable economy where everyone can prosper. We support a wide range of digital payments choices, making transactions secure, simple, smart and accessible. Our technology and innovation, partnerships and networks combine to deliver a unique set of products and services that help people, businesses and governments realize their greatest potential. Title and Summary Mastercard is a global technology company in the payments industry, connecting billions of consumers, financial institutions, merchants, governments, and businesses worldwide. We are driving the future of commerce by enabling secure, simple, and smart transactions.
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        Our Purpose Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, were helping build a sustainable economy where everyone can prosper. We support a wide range of digital payments choices, making transactions secure, simple, smart and accessible. Our technology and innovation, partnerships and networks combine to deliver a unique set of products and services that help people, businesses and governments realize their greatest potential. Title and Summary Mastercard Developers ( is the single platform for Mastercard partners to access a diverse range of payment, data, loyalty, and security APIs. The team is responsible for delivering an experience that ensures developers can quickly find the right API, assess its technical capabilities and integrate it into new and innovative solutions.
        Our Purpose Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, were helping build a sustainable economy where everyone can prosper. We support a wide range of digital payments choices, making transactions secure, simple, smart and accessible. Our technology and innovation, partnerships and networks combine to deliver a unique set of products and services that help people, businesses and governments realize their greatest potential. Title and Summary Mastercard Developers ( is the single platform for Mastercard partners to access a diverse range of payment, data, loyalty, and security APIs. The team is responsible for delivering an experience that ensures developers can quickly find the right API, assess its technical capabilities and integrate it into new and innovative solutions.
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        Our Purpose Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, were helping build a sustainable economy where everyone can prosper. We support a wide range of digital payments choices, making transactions secure, simple, smart and accessible. Our technology and innovation, partnerships and networks combine to deliver a unique set of products and services that help people, businesses and governments realize their greatest potential. Title and Summary Do you enjoy being part of a team that drives business growth by building scalable payment products, fostering deep partnerships, and enabling adoption of innovative solutions? Are you passionate about cutting edge innovation in cross-border money movement?
        Our Purpose Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, were helping build a sustainable economy where everyone can prosper. We support a wide range of digital payments choices, making transactions secure, simple, smart and accessible. Our technology and innovation, partnerships and networks combine to deliver a unique set of products and services that help people, businesses and governments realize their greatest potential. Title and Summary Do you enjoy being part of a team that drives business growth by building scalable payment products, fostering deep partnerships, and enabling adoption of innovative solutions? Are you passionate about cutting edge innovation in cross-border money movement?
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        Full Stack Developer

        Loopla
        Euston, North West London (NW1), NW1 2RT
        Competitive
        About Loopla Loopla is a London-based family events marketplace helping parents discover and book activities for their children. Were a small engineering team, moving quickly and building the tools that power both family discovery and organiser growth. Every engineer has real ownership and impact. The Role Were looking for a Senior Full Stack Engineer who enjoys solving hard problems, takes initiative, and cares about building things properly. Youll work across the stack, own major features end to end, and help shape the direction of a growing product. This is a hybrid role: 3 days in our Euston office, 2 days remote. We may be relocating to Stratford in the coming months, and the hybrid pattern would remain the same. Responsibilities * Lead feature planning and turn ideas into well-scoped, buildable work * Build reliable, maintainable frontend and backend systems
        About Loopla Loopla is a London-based family events marketplace helping parents discover and book activities for their children. Were a small engineering team, moving quickly and building the tools that power both family discovery and organiser growth. Every engineer has real ownership and impact. The Role Were looking for a Senior Full Stack Engineer who enjoys solving hard problems, takes initiative, and cares about building things properly. Youll work across the stack, own major features end to end, and help shape the direction of a growing product. This is a hybrid role: 3 days in our Euston office, 2 days remote. We may be relocating to Stratford in the coming months, and the hybrid pattern would remain the same. Responsibilities * Lead feature planning and turn ideas into well-scoped, buildable work * Build reliable, maintainable frontend and backend systems
        more

        Solution Architect

        MFA Talent Services
        City of London, London
        £60,000 – £95,000 + Bonus
        Location: London, Manchester or Bristol (Hybrid 60% onsite) Salary: £60,000 £95,000 + Bonus This role requires the ability to gain SC Clearance About the Role This role offers the opportunity to operate as an end-to-end Solution Architect on major digital transformation initiatives, working directly with senior business and technology leaders. Youll design and deliver modern, cloud-native, scalable architectures across AWS, Azure and GCP, applying engineering-led thinking and hands-on technical depth to shape high-impact solutions for FTSE 100 clients. Youll act as a trusted technical advisor, defining solution options, guiding engineering teams, ensuring architectural integrity, and supporting clients from early discovery and conceptualisation through to delivery.
        Location: London, Manchester or Bristol (Hybrid 60% onsite) Salary: £60,000 £95,000 + Bonus This role requires the ability to gain SC Clearance About the Role This role offers the opportunity to operate as an end-to-end Solution Architect on major digital transformation initiatives, working directly with senior business and technology leaders. Youll design and deliver modern, cloud-native, scalable architectures across AWS, Azure and GCP, applying engineering-led thinking and hands-on technical depth to shape high-impact solutions for FTSE 100 clients. Youll act as a trusted technical advisor, defining solution options, guiding engineering teams, ensuring architectural integrity, and supporting clients from early discovery and conceptualisation through to delivery.
        more
        Job Summary As a Technology Architect, you will leverage your expertise in Google Cloud Platform (GCP) and Apigee to design and implement robust API solutions. With a strong focus on cloud infrastructure, API security, and performance optimization, you will ensure seamless integration across enterprise systems. Your role will be pivotal in driving innovation within telecom domain projects, contributing to business success and societal impact. 5 days per week at the offices in Canary Wharf Responsibilities * Design and implement scalable API solutions using Google Cloud Platform and Apigee to meet business requirements. * Collaborate with cross-functional teams to integrate Apigee API Hub and Apigee Hybrid into existing systems. * Oversee deployment and management of Anthos Service Mesh to enhance service connectivity and security.
        Job Summary As a Technology Architect, you will leverage your expertise in Google Cloud Platform (GCP) and Apigee to design and implement robust API solutions. With a strong focus on cloud infrastructure, API security, and performance optimization, you will ensure seamless integration across enterprise systems. Your role will be pivotal in driving innovation within telecom domain projects, contributing to business success and societal impact. 5 days per week at the offices in Canary Wharf Responsibilities * Design and implement scalable API solutions using Google Cloud Platform and Apigee to meet business requirements. * Collaborate with cross-functional teams to integrate Apigee API Hub and Apigee Hybrid into existing systems. * Oversee deployment and management of Anthos Service Mesh to enhance service connectivity and security.
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        Senior Full Stack .Net Developer

        Hays
        Gatwick (RH6)
        £65000 - £75000 per annum + £65-75k + Benefits
        Gatwick (1-2 days per week in office) £65-75k + Benefits. Your new company This leading financial and consulting business are looking to bolster their engineering team with a Senior Full Stack .Net Developer to join their core team of 16 Devs. You will be working in their state-of-the-art offices near to Gatwick/Crawley and will be required to work 1-2 days per week in the office. Your new role This is a full-stack, full software lifecycle role where Devs are encouraged to bring ideas to the table and challenge the status quo. From architecture and development through to deployment you'll play a key role in building cutting-edge solutions by developing .NET microservices and dynamic Angular front-end applications (we can consider React cross-training to Angular).
        Gatwick (1-2 days per week in office) £65-75k + Benefits. Your new company This leading financial and consulting business are looking to bolster their engineering team with a Senior Full Stack .Net Developer to join their core team of 16 Devs. You will be working in their state-of-the-art offices near to Gatwick/Crawley and will be required to work 1-2 days per week in the office. Your new role This is a full-stack, full software lifecycle role where Devs are encouraged to bring ideas to the table and challenge the status quo. From architecture and development through to deployment you'll play a key role in building cutting-edge solutions by developing .NET microservices and dynamic Angular front-end applications (we can consider React cross-training to Angular).
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        Full Stack Engineer Python TypeScript

        Client Server
        St James, South West London (SW1), SW1A
        £100000 - £120000 per annum + bonus + benefits
        Full Stack Engineer / Developer (Python TypeScript) London / WFH to £120k Are you a technologist with start-up experience looking for your next opportunity? You could be progressing your career at a tech start-up that is producing an AI native data pipelining platform. As a Full Stack Engineer within a small team, you will build and implement new features across the full tech stack, with a focus on backend Python and TypeScript and some React work on the front end. You'll take ownership and work across the full development lifecycle, collaborating with customers to build and scale the product. The work is interesting and complex, you'll be able to contribute to the product vision and strategy playing a pivotal role in the company's success. You'll join colleagues in the London office (close to Waterloo) with flexibility to work from home twice a week.
        Full Stack Engineer / Developer (Python TypeScript) London / WFH to £120k Are you a technologist with start-up experience looking for your next opportunity? You could be progressing your career at a tech start-up that is producing an AI native data pipelining platform. As a Full Stack Engineer within a small team, you will build and implement new features across the full tech stack, with a focus on backend Python and TypeScript and some React work on the front end. You'll take ownership and work across the full development lifecycle, collaborating with customers to build and scale the product. The work is interesting and complex, you'll be able to contribute to the product vision and strategy playing a pivotal role in the company's success. You'll join colleagues in the London office (close to Waterloo) with flexibility to work from home twice a week.
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        PREMIUM
        Location: London - 1x a month Salary: Up to £120,000 (D.O.E) + benefits Fruition Group are partnering with a high-growth Insurtech unicorn that's scaling its engineering function. This is a unique chance to work across both proven, revenue-generating products and greenfield initiatives that are reshaping the future of insurance. It's an ideal role for a driven Lead Engineer who thrives in ambitious environments and wants to make a tangible impact. As a Lead Backend Engineer, you'll take ownership of designing and scaling cloud-native backend systems. You'll work primarily with Python (FastAPI) and play a key role in shaping the architecture of microservices that support millions of users. Beyond hands-on development, you'll provide technical leadership, mentor team members, and influence strategic engineering decisions.
        Location: London - 1x a month Salary: Up to £120,000 (D.O.E) + benefits Fruition Group are partnering with a high-growth Insurtech unicorn that's scaling its engineering function. This is a unique chance to work across both proven, revenue-generating products and greenfield initiatives that are reshaping the future of insurance. It's an ideal role for a driven Lead Engineer who thrives in ambitious environments and wants to make a tangible impact. As a Lead Backend Engineer, you'll take ownership of designing and scaling cloud-native backend systems. You'll work primarily with Python (FastAPI) and play a key role in shaping the architecture of microservices that support millions of users. Beyond hands-on development, you'll provide technical leadership, mentor team members, and influence strategic engineering decisions.
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        Location: London - 1x a month Salary: Up to £95,000 (D.O.E) + benefits Fruition Group working with a leading Insurtech unicorn on a mission to transform the insurance industry. Their products have already generated millions in revenue, and now they're investing heavily in new innovations that will shape the sector for years to come. This is an exciting opportunity for a motivated Senior Engineer who wants to grow in a high-performing, forward-thinking business. As a Senior Backend Engineer, you'll play a central role in building and scaling the systems that power their insurance platform. You'll focus on developing Python-based cloud microservices (FastAPI preferred), contributing to the architecture of resilient, high-performance systems, and collaborating with a cross-functional team to deliver features at pace.
        Location: London - 1x a month Salary: Up to £95,000 (D.O.E) + benefits Fruition Group working with a leading Insurtech unicorn on a mission to transform the insurance industry. Their products have already generated millions in revenue, and now they're investing heavily in new innovations that will shape the sector for years to come. This is an exciting opportunity for a motivated Senior Engineer who wants to grow in a high-performing, forward-thinking business. As a Senior Backend Engineer, you'll play a central role in building and scaling the systems that power their insurance platform. You'll focus on developing Python-based cloud microservices (FastAPI preferred), contributing to the architecture of resilient, high-performance systems, and collaborating with a cross-functional team to deliver features at pace.
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        Our Purpose Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, were helping build a sustainable economy where everyone can prosper. We support a wide range of digital payments choices, making transactions secure, simple, smart and accessible. Our technology and innovation, partnerships and networks combine to deliver a unique set of products and services that help people, businesses and governments realize their greatest potential. Title and Summary Customer Delivery Europe is part of the Global Customer Delivery & Care and Europe International Markets organization and plays a critical role ensuring the flawless delivery of Mastercard products and solutions for our customers.
        Our Purpose Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, were helping build a sustainable economy where everyone can prosper. We support a wide range of digital payments choices, making transactions secure, simple, smart and accessible. Our technology and innovation, partnerships and networks combine to deliver a unique set of products and services that help people, businesses and governments realize their greatest potential. Title and Summary Customer Delivery Europe is part of the Global Customer Delivery & Care and Europe International Markets organization and plays a critical role ensuring the flawless delivery of Mastercard products and solutions for our customers.
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        Our Purpose Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, were helping build a sustainable economy where everyone can prosper. We support a wide range of digital payments choices, making transactions secure, simple, smart and accessible. Our technology and innovation, partnerships and networks combine to deliver a unique set of products and services that help people, businesses and governments realize their greatest potential. Title and Summary Overview We are looking for a software engineer to join an award winning team with a proven track record of combining data science techniques with an intimate knowledge of payments data to aid Financial Institutions in their fight against money laundering and fraud.
        Our Purpose Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, were helping build a sustainable economy where everyone can prosper. We support a wide range of digital payments choices, making transactions secure, simple, smart and accessible. Our technology and innovation, partnerships and networks combine to deliver a unique set of products and services that help people, businesses and governments realize their greatest potential. Title and Summary Overview We are looking for a software engineer to join an award winning team with a proven track record of combining data science techniques with an intimate knowledge of payments data to aid Financial Institutions in their fight against money laundering and fraud.
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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 209 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.