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        The City, City (EC4)
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        176




        32 Contract API jobs in The City, City of London + 20 miles

        TypeScript Developer Full Stack - Fintech

        Client Server
        Shoreditch, East London (E1), EC2A
        £50000 - £60000 per annum + benefits
        TypeScript Developer / Engineer (Full Stack API React) London / WFH to £60k Are you a bright, ambitious technologist who enjoys working with a range of programming languages across the full tech stack? You could progress your career at a scaling Fintech company that has developed a digital distribution platform transforming electronic trading in the institutional FX options market via a central marketplace where institutions can place, discover and match option interests electronically, improving liquidity and efficiency for all participants as the platform scales. * Salary to £60k * Stock options * Excellent career growth * Remote working
        TypeScript Developer / Engineer (Full Stack API React) London / WFH to £60k Are you a bright, ambitious technologist who enjoys working with a range of programming languages across the full tech stack? You could progress your career at a scaling Fintech company that has developed a digital distribution platform transforming electronic trading in the institutional FX options market via a central marketplace where institutions can place, discover and match option interests electronically, improving liquidity and efficiency for all participants as the platform scales. * Salary to £60k * Stock options * Excellent career growth * Remote working
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        PREMIUM
        Initial 3-month Contract Role 2-3 days a week on-site in London £370 - £375, Inside IR35 We're recruiting on behalf of a Global Services Provider who are looking for an SC Cleared AWS DevOps Engineer with strong expertise in Infrastructure as Code, AWS, Terraform, and GitLab. * Design, build, and maintain cloud infrastructure using Terraform * Develop and manage solutions on AWS * Implement and support CI/CD pipelines using GitLab * Ensure infrastructure is secure, scalable, and reliable * Monitor systems and applications, addressing performance and availability issues * Support API integrations and deployments * Terraform * AWS * GitLab * CI/CD pipelines * Infrastructure as Code * Monitoring and security best practices * Unix/Linux environments * APIs * Active SC Clearance (essential, candidates without this will not be considered)
        Initial 3-month Contract Role 2-3 days a week on-site in London £370 - £375, Inside IR35 We're recruiting on behalf of a Global Services Provider who are looking for an SC Cleared AWS DevOps Engineer with strong expertise in Infrastructure as Code, AWS, Terraform, and GitLab. * Design, build, and maintain cloud infrastructure using Terraform * Develop and manage solutions on AWS * Implement and support CI/CD pipelines using GitLab * Ensure infrastructure is secure, scalable, and reliable * Monitor systems and applications, addressing performance and availability issues * Support API integrations and deployments * Terraform * AWS * GitLab * CI/CD pipelines * Infrastructure as Code * Monitoring and security best practices * Unix/Linux environments * APIs * Active SC Clearance (essential, candidates without this will not be considered)
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        Description We are seeking a Finance Technology e-Invoicing Lead to spearhead a rollout of our electronic invoicing solution across MUFG Bank EMEA & MUFG Securities, focussing on French & UAE territories. This role involves leading design and implementation of a new B2B partner network which will be used in conjunction with the group ERP solution, Oracle Cloud Financials. The successful candidate will act as a bridge and help navigate a complex technical and stakeholder environment, partnering with Finance, Technology and several other groups across the MUFG network. 1. Technical Architecture & Integration Lead the end-to-end technical design and implementation of the e-invoicing solution across EMEA, initially focussing on France & UAE. Lead the technical integration work between Oracle Fusion Financials ERP cloud and the B2B partner network
        Description We are seeking a Finance Technology e-Invoicing Lead to spearhead a rollout of our electronic invoicing solution across MUFG Bank EMEA & MUFG Securities, focussing on French & UAE territories. This role involves leading design and implementation of a new B2B partner network which will be used in conjunction with the group ERP solution, Oracle Cloud Financials. The successful candidate will act as a bridge and help navigate a complex technical and stakeholder environment, partnering with Finance, Technology and several other groups across the MUFG network. 1. Technical Architecture & Integration Lead the end-to-end technical design and implementation of the e-invoicing solution across EMEA, initially focussing on France & UAE. Lead the technical integration work between Oracle Fusion Financials ERP cloud and the B2B partner network
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        Software Engineer Full Stack Java - HealthTech

        Client Server
        The City, City of London (EC3), EC3V
        £85000 - £100000 per annum + pension
        Software Engineer / Developer (Full Stack Java) London / WFH to £100k Are you Java technologist? You could be progressing your career in a hands-on, impactful, Software Engineer role, working on a 'tech for good' product that is helping to drive efficiencies for the NHS, the core product is a highly complex real-time shift rota application, hosted on AWS and available via the web or mobile device (iOS / Android). As a Software Engineer you will play a crucial role in re-architecting and enhancing the scheduling platform to a Java and Angular codebase (from Ruby and TypeScript). You'll focus on designing and developing scalable backend Java services and REST APIs and build responsive, as well as writing and optimising SQL database queries and occasional front end work, creating user friendly interfaces using Angular (v15+).
        Software Engineer / Developer (Full Stack Java) London / WFH to £100k Are you Java technologist? You could be progressing your career in a hands-on, impactful, Software Engineer role, working on a 'tech for good' product that is helping to drive efficiencies for the NHS, the core product is a highly complex real-time shift rota application, hosted on AWS and available via the web or mobile device (iOS / Android). As a Software Engineer you will play a crucial role in re-architecting and enhancing the scheduling platform to a Java and Angular codebase (from Ruby and TypeScript). You'll focus on designing and developing scalable backend Java services and REST APIs and build responsive, as well as writing and optimising SQL database queries and occasional front end work, creating user friendly interfaces using Angular (v15+).
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        PREMIUM

        Lead Data Engineer AWS Snowflake

        Client Server
        Shoreditch, East London (E1), EC2A
        €90000 - €110000 per annum
        Are you a technologist Data Engineer with strong technical leadership skills? You could be progressing your career in an impactful, hands-on Lead Data Engineer role at a growing technology company as they expand their UK presence. As a Lead Data Engineer you'll take responsibility for the team's engineering practices such as code reviews and CI/CD and for overall code quality and test coverage. You'll plan and manage the team's Sprints, collaborating closely with product and engineering management to deliver solutions across a range of complex data sources and data integrations, including Data Warehouses / Data Lakes, Data Marts, data ingestion and record matching and merging. You'll be able to work from home most of the time, meeting up with colleagues in the London office once or twice a week.
        Are you a technologist Data Engineer with strong technical leadership skills? You could be progressing your career in an impactful, hands-on Lead Data Engineer role at a growing technology company as they expand their UK presence. As a Lead Data Engineer you'll take responsibility for the team's engineering practices such as code reviews and CI/CD and for overall code quality and test coverage. You'll plan and manage the team's Sprints, collaborating closely with product and engineering management to deliver solutions across a range of complex data sources and data integrations, including Data Warehouses / Data Lakes, Data Marts, data ingestion and record matching and merging. You'll be able to work from home most of the time, meeting up with colleagues in the London office once or twice a week.
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        PREMIUM

        Engineering Manager Java AI - FinTech

        Client Server
        Shoreditch, East London (E1), EC2A
        £125000 - £140000 per annum + bonus + benefits
        Engineering Manager (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. * Salary to £140k + Bonus * Pension, Private Medical Care, Life Assurance * Option to buy or sell holiday days * Wellness benefits and gym subsidy * Childcare vouchers * Enhanced paternity leave including shared parental pay and leave * Employee led LGBTQ+, Women's, Black and Parents & Carers networks with an annual budget for organising events and projects that foster an open, diverse and inclusive culture * Plus a range of other perks
        Engineering Manager (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. * Salary to £140k + Bonus * Pension, Private Medical Care, Life Assurance * Option to buy or sell holiday days * Wellness benefits and gym subsidy * Childcare vouchers * Enhanced paternity leave including shared parental pay and leave * Employee led LGBTQ+, Women's, Black and Parents & Carers networks with an annual budget for organising events and projects that foster an open, diverse and inclusive culture * Plus a range of other perks
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        PREMIUM

        Presales Data & AI Architect

        Eviden UK International Ltd
        UK
        Attractive salary plus excellent benefits
        Atos Group is a global leader in digital transformation with c. 70,000 employees and annual revenue of c. € 10 billion, operating in 67 countries under two brands Atos for services and Eviden for products. European number one in cybersecurity, cloud and high-performance computing, Atos Group is committed to a secure and decarbonized future and provides tailored AI-powered, end-to-end solutions for all industries. Atos is a SE (Societas Europaea) and listed on Euronext Paris. Thepurpose of Atosis to help design the future of the information space. Its expertise and services support the development of knowledge, education and research in a multicultural approach and contribute to the development of scientific and technological excellence.
        Atos Group is a global leader in digital transformation with c. 70,000 employees and annual revenue of c. € 10 billion, operating in 67 countries under two brands Atos for services and Eviden for products. European number one in cybersecurity, cloud and high-performance computing, Atos Group is committed to a secure and decarbonized future and provides tailored AI-powered, end-to-end solutions for all industries. Atos is a SE (Societas Europaea) and listed on Euronext Paris. Thepurpose of Atosis to help design the future of the information space. Its expertise and services support the development of knowledge, education and research in a multicultural approach and contribute to the development of scientific and technological excellence.
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        FEATURED

        Java Developer AWS React Full Stack - Start-up

        Client Server
        The City, City of London (EC4), EC2V
        £70000 - £80000 per annum + benefits
        Java Developer / Software Engineer (AWS React Full Stack) London / WFH to £80k Are you a technologist Java Developer looking for an opportunity to be part of something big from the start? You could be progressing your career in an impactful role at a newly established Fintech start-up, set up by a small team of finance and technology entrepreneurs with a hugely successful track record. As a Java Developer you will join a small team to build systems from the ground up, working across the full technology stack with a focus on designing, developing and deploying cloud-native microservices that form the core of the platform. You'll collaborate closely with the Lead Engineer, Architect and Product Manager to shape system design, APIs and data models to enable scalable backend logic and clean UI.
        Java Developer / Software Engineer (AWS React Full Stack) London / WFH to £80k Are you a technologist Java Developer looking for an opportunity to be part of something big from the start? You could be progressing your career in an impactful role at a newly established Fintech start-up, set up by a small team of finance and technology entrepreneurs with a hugely successful track record. As a Java Developer you will join a small team to build systems from the ground up, working across the full technology stack with a focus on designing, developing and deploying cloud-native microservices that form the core of the platform. You'll collaborate closely with the Lead Engineer, Architect and Product Manager to shape system design, APIs and data models to enable scalable backend logic and clean UI.
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        PREMIUM

        Integration Architect

        Anson Mccade
        South West London (SW1)
        100,000 - 120,000 Annual
        £100,000 - 120,000 GBP Hybrid WORKING Location: Central London, Greater London - United Kingdom Type: Permanent Senior Manager - Integration Architect (UK Wide) Salary: Up to £120,000 per year (dependent on experience) Working Model: Flexible / UK-wide A leading global professional services firm is seeking an accomplished Senior Manager to join their Technology Advisory practice as an Integration Architect. This role offers the chance to shape enterprise-wide integration strategies, influence C-suite stakeholders, and lead high-impact technology initiatives across diverse industries. * Lead strategic integration architecture initiatives, developing and executing enterprise integration roadmaps and solutions. * Direct complex integration programmes, ensuring alignment with business objectives and technology vision.
        £100,000 - 120,000 GBP Hybrid WORKING Location: Central London, Greater London - United Kingdom Type: Permanent Senior Manager - Integration Architect (UK Wide) Salary: Up to £120,000 per year (dependent on experience) Working Model: Flexible / UK-wide A leading global professional services firm is seeking an accomplished Senior Manager to join their Technology Advisory practice as an Integration Architect. This role offers the chance to shape enterprise-wide integration strategies, influence C-suite stakeholders, and lead high-impact technology initiatives across diverse industries. * Lead strategic integration architecture initiatives, developing and executing enterprise integration roadmaps and solutions. * Direct complex integration programmes, ensuring alignment with business objectives and technology vision.
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        NEWPREMIUM
        Home-based within the UK About Us At Family Action, we transform lives by providing practical, emotional, and financial support to those experiencing poverty, disadvantage, and social isolation. Since 1869, weve been building stronger families, and today, we work with over 60,000 families across more than 190 services. We also support thousands more through national programmes and grants, helping everyone find the tools to overcome challenges and thrive. Were now looking for a Back-End Developer to join us on a full-time, permanent basis, working 37 hours per week. TheBenefits - Salary of £43,042 per annum (inclusive of £1,044 market supplement and £480 home working allowance) - An annual paid leave entitlement of 30 working days plus bank holidays - Up to 6% matched-pension contributions
        Home-based within the UK About Us At Family Action, we transform lives by providing practical, emotional, and financial support to those experiencing poverty, disadvantage, and social isolation. Since 1869, weve been building stronger families, and today, we work with over 60,000 families across more than 190 services. We also support thousands more through national programmes and grants, helping everyone find the tools to overcome challenges and thrive. Were now looking for a Back-End Developer to join us on a full-time, permanent basis, working 37 hours per week. TheBenefits - Salary of £43,042 per annum (inclusive of £1,044 market supplement and £480 home working allowance) - An annual paid leave entitlement of 30 working days plus bank holidays - Up to 6% matched-pension contributions
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        £120,000 GBP Hybrid WORKING Location: Central London, Greater London - United Kingdom Type: Permanent A senior leadership opportunity is available for an experienced Director of Integration Architecture to provide strategic direction across enterprise-wide integration initiatives, shaping technology strategy while driving measurable commercial growth. This role operates at the intersection of enterprise architecture, executive advisory and business development, engaging extensively with C-suite and senior leadership teams. The Director will lead the definition, governance and execution of large-scale integration architectures that deliver long-term business value, operational efficiency and competitive advantage. The Role
        £120,000 GBP Hybrid WORKING Location: Central London, Greater London - United Kingdom Type: Permanent A senior leadership opportunity is available for an experienced Director of Integration Architecture to provide strategic direction across enterprise-wide integration initiatives, shaping technology strategy while driving measurable commercial growth. This role operates at the intersection of enterprise architecture, executive advisory and business development, engaging extensively with C-suite and senior leadership teams. The Director will lead the definition, governance and execution of large-scale integration architectures that deliver long-term business value, operational efficiency and competitive advantage. The Role
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        NEWPREMIUM

        Dynamics 365 Finance Developer

        Eviden UK International Ltd
        UK
        Attractive salary plus excellent benefits.
        * Salary: Attractive salary plus excellent benefits. * Location: UK Wide * Remote * Travel required: May require UK domestic travel, as the need arises. Atos Group is a global leader in digital transformation with c. 70,000 employees and annual revenue of c. € 10 billion, operating in 67 countries under two brands Atos for services and Eviden for products. European number one in cybersecurity, cloud and high-performance computing, Atos Group is committed to a secure and decarbonized future and provides tailored AI-powered, end-to-end solutions for all industries. Atos is a SE (Societas Europaea) and listed on Euronext Paris. Our Dynamics Practice and Power Platform Team is at the forefront of delivering innovative, high-impact solutions to leading Financial Services organizations and large Government clients.
        * Salary: Attractive salary plus excellent benefits. * Location: UK Wide * Remote * Travel required: May require UK domestic travel, as the need arises. Atos Group is a global leader in digital transformation with c. 70,000 employees and annual revenue of c. € 10 billion, operating in 67 countries under two brands Atos for services and Eviden for products. European number one in cybersecurity, cloud and high-performance computing, Atos Group is committed to a secure and decarbonized future and provides tailored AI-powered, end-to-end solutions for all industries. Atos is a SE (Societas Europaea) and listed on Euronext Paris. Our Dynamics Practice and Power Platform Team is at the forefront of delivering innovative, high-impact solutions to leading Financial Services organizations and large Government clients.
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        FEATURED

        Payment Architect

        Stackstudio Digital Ltd.
        Watford, Hertfordshire
        Unspecified
        Job title- Payment Architect Location: Milton Keynes (2-3 days) Duration: 6 Months Job Description Santander UK is expanding its Payments Solution Architecture team. We are looking for senior level architects with deep experience in payments execution processing. These hires will support the modernisation of our payments estate and the migration of legacy platforms to the Payments Hub (PagoNxt). The individuals must have strong payments scheme knowledge, deep understanding of ISO 20022, and proven experience designing solutions for core payment processing. Payments domain expertise * Strong experience across payments execution processes such as orchestration, order management, clearing, settlement, reconciliations, exception handling and returns. * Practical scheme knowledge in at least several of the following: Bacs, Faster Payments, CHAPS, SWIFT, SEPA, cheques.
        Job title- Payment Architect Location: Milton Keynes (2-3 days) Duration: 6 Months Job Description Santander UK is expanding its Payments Solution Architecture team. We are looking for senior level architects with deep experience in payments execution processing. These hires will support the modernisation of our payments estate and the migration of legacy platforms to the Payments Hub (PagoNxt). The individuals must have strong payments scheme knowledge, deep understanding of ISO 20022, and proven experience designing solutions for core payment processing. Payments domain expertise * Strong experience across payments execution processes such as orchestration, order management, clearing, settlement, reconciliations, exception handling and returns. * Practical scheme knowledge in at least several of the following: Bacs, Faster Payments, CHAPS, SWIFT, SEPA, cheques.
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        Contract Technical Business Analyst – ServiceNow Outside IR35 | Contract | Hybrid / Remote (UK) | Up to £500 a day I'm seeking an experienced Technical Business Analyst with strong ServiceNow expertise to support a large-scale transformation programme within a complex enterprise environment. This is a contract role operating Outside IR35, ideal for a delivery-focused consultant who can bridge the gap between business stakeholders and technical teams. Key Responsibilities * Elicit, analyse, and document business and technical requirements across ServiceNow modules * Act as the primary interface between stakeholders, developers, architects, and ServiceNow platform teams * Translate business needs into clear functional and technical specifications (user stories, process flows, data models)
        Contract Technical Business Analyst – ServiceNow Outside IR35 | Contract | Hybrid / Remote (UK) | Up to £500 a day I'm seeking an experienced Technical Business Analyst with strong ServiceNow expertise to support a large-scale transformation programme within a complex enterprise environment. This is a contract role operating Outside IR35, ideal for a delivery-focused consultant who can bridge the gap between business stakeholders and technical teams. Key Responsibilities * Elicit, analyse, and document business and technical requirements across ServiceNow modules * Act as the primary interface between stakeholders, developers, architects, and ServiceNow platform teams * Translate business needs into clear functional and technical specifications (user stories, process flows, data models)
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        Business Analyst

        REC SOLUTIONS LIMITED
        The City, City of London (EC4), EC4N
        Competitive base salary plus bonus and benefits
        ***Hybrid, 3 days a week in the office 2 days remote*** An excellent opportunity has arisen for a Business Analyst to join a forward thinking, innovative exchange based in the City, London working with some cutting edge technologies. Benefits (not exhaustive list) - Business Analyst (FinTech, Financial Services, Trading, Equities, Equity) * Competitive salary * 25 days annual leave - not including bank holidays * Can opt to join Private Medical insurance scheme * Hybrid working * Flexible working hours * Company pension * Group Policies Life Assurance, Income Protection and Critical Illness * Discretionary bonus * Can opt to join Electric Car Scheme * Enhanced Maternity and Paternity Policy * Can opt to join Workplace Nursery Scheme * Length of service holiday entitlement
        ***Hybrid, 3 days a week in the office 2 days remote*** An excellent opportunity has arisen for a Business Analyst to join a forward thinking, innovative exchange based in the City, London working with some cutting edge technologies. Benefits (not exhaustive list) - Business Analyst (FinTech, Financial Services, Trading, Equities, Equity) * Competitive salary * 25 days annual leave - not including bank holidays * Can opt to join Private Medical insurance scheme * Hybrid working * Flexible working hours * Company pension * Group Policies Life Assurance, Income Protection and Critical Illness * Discretionary bonus * Can opt to join Electric Car Scheme * Enhanced Maternity and Paternity Policy * Can opt to join Workplace Nursery Scheme * Length of service holiday entitlement
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        Python Engineer

        Bloc Recruitment
        The City, City of London (EC4), EC2R
        £475 per day
        Up to £475 Per day inside IR35 Long term contract Remote UK/EU We’re looking for a BE Engineer to design and build high-quality backend systems and data pipelines that power the analytics platform. You’ll collaborate with engineers and the Product team across the full software lifecycle, leading on scalable services that ingest, transform and deliver data to our frontend applications and customers. You’ll bring strong Python skills, experience with microservices and data ingestion/ETL pipelines, and an eye for clean, maintainable code. Familiarity with AI-assisted dev tools (GitHub Copilot, Cursor, Windsurf, Devin) is a plus — we encourage using them to boost developer velocity and quality. What you’ll do * Design and implement robust, scalable backend services in Python * Own and improve data ingestion & processing pipelines
        Up to £475 Per day inside IR35 Long term contract Remote UK/EU We’re looking for a BE Engineer to design and build high-quality backend systems and data pipelines that power the analytics platform. You’ll collaborate with engineers and the Product team across the full software lifecycle, leading on scalable services that ingest, transform and deliver data to our frontend applications and customers. You’ll bring strong Python skills, experience with microservices and data ingestion/ETL pipelines, and an eye for clean, maintainable code. Familiarity with AI-assisted dev tools (GitHub Copilot, Cursor, Windsurf, Devin) is a plus — we encourage using them to boost developer velocity and quality. What you’ll do * Design and implement robust, scalable backend services in Python * Own and improve data ingestion & processing pipelines
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        Senior Java Software Engineer (Urgent)

        Morson Edge
        Tower Hill, City of London (EC3), E1W 1WY
        £500 - 600 per day
        We are seeking an experienced Senior Java Software Engineer to join the IT team at a leading bank, supporting the delivery, maintenance, and enhancement of core systems across various business areas, including operations, compliance, transactions, and client management. This is a 6-month contract role offering an excellent day rate, ideally suited to candidates with experience in regulated environments, financial services, or government/public sector organisations. In this role, you will be an integral part of the software development lifecycle, working closely with Senior Java Developers, UI/UX teams, and Agile Transformation to architect, build, and deliver greenfield, brownfield, and integration applications.
        We are seeking an experienced Senior Java Software Engineer to join the IT team at a leading bank, supporting the delivery, maintenance, and enhancement of core systems across various business areas, including operations, compliance, transactions, and client management. This is a 6-month contract role offering an excellent day rate, ideally suited to candidates with experience in regulated environments, financial services, or government/public sector organisations. In this role, you will be an integral part of the software development lifecycle, working closely with Senior Java Developers, UI/UX teams, and Agile Transformation to architect, build, and deliver greenfield, brownfield, and integration applications.
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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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        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
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        Senior DeFi Backend Engineer

        Plexus Resource Solutions Ltd
        City of London (EC1)
        Up to £175,000 per annum
        DeFi Remote Upto€200k+ Tokens Plexus is partnering with a long-standing DeFi protocol building a next-generation trading platform. Theyre pioneering a new model for automated strategies and and are now looking for a Senior DeFi Backend Engineer to help build the core systems powering it. Youll join a highly technical team working across general backend systems engineering along with apis, optimising the application for performance, arbitrage bots and more. 3+ years experience with backend Python : Including async systems, data pipelines, or protocol-level integrations. 1+ year of recent Rust experience : With the ability to read, modify, and contribute to Rust-based components. DevOps: Ideally with docker experience
        DeFi Remote Upto€200k+ Tokens Plexus is partnering with a long-standing DeFi protocol building a next-generation trading platform. Theyre pioneering a new model for automated strategies and and are now looking for a Senior DeFi Backend Engineer to help build the core systems powering it. Youll join a highly technical team working across general backend systems engineering along with apis, optimising the application for performance, arbitrage bots and more. 3+ years experience with backend Python : Including async systems, data pipelines, or protocol-level integrations. 1+ year of recent Rust experience : With the ability to read, modify, and contribute to Rust-based components. DevOps: Ideally with docker experience
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        Salesforce Marketing Cloud Engineer

        Stackstudio Digital Ltd.
        Paddington, West London (W2)
        From £450 to £500 per day
        Role / Job Title:Salesforce Marketing Cloud Engineer Work Location:Paddington, London If Hybrid, Number of Days Required in Office:2 days The Role This exciting role will sit within the Marketing Automations team as part of Loyalty Transformation program for a leading UK retailer, executing and delivering high-profile triggered marketing email campaigns to millions of customers. You'll have extensive expertise delivering dynamic emails in line with marketing objectives, using Salesforce Marketing Cloud. You will be responsible for the layout, visual appearance, HTML & AMPScript build and testing of emails to our customer base. You will be able to work at a dynamic pace, with excellent attention to detail, ensuring emails are optimized for all browsers and devices.
        Role / Job Title:Salesforce Marketing Cloud Engineer Work Location:Paddington, London If Hybrid, Number of Days Required in Office:2 days The Role This exciting role will sit within the Marketing Automations team as part of Loyalty Transformation program for a leading UK retailer, executing and delivering high-profile triggered marketing email campaigns to millions of customers. You'll have extensive expertise delivering dynamic emails in line with marketing objectives, using Salesforce Marketing Cloud. You will be responsible for the layout, visual appearance, HTML & AMPScript build and testing of emails to our customer base. You will be able to work at a dynamic pace, with excellent attention to detail, ensuring emails are optimized for all browsers and devices.
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        Affinity Water is excited to be growing our Maximo Team, and we are looking for someone who is passionate, curious and ready to make an impact to join us as a Maximo Specialist on a 12 month fixed Term Contract. As a Maximo Specialist, you will be seen as one of the companys resident experts in how Maximo works. In conjunction with IT and business change teams you will be responsible for requirements definition, analysis, and design of Maximo enhancements, automation scripts and integrations. * ESRI GIS Mapping solution * Hi-Affinity CMS * Aurora Streetworks Management system * Waternet Leakage Monitoring system * Oracle Fusion Finance and Procurement system * FLS Visitour Scheduling There is an ambitious road map for the next few years which includes regulatory change, enhancements, small change, and an upgrade to MAS to name a few.
        Affinity Water is excited to be growing our Maximo Team, and we are looking for someone who is passionate, curious and ready to make an impact to join us as a Maximo Specialist on a 12 month fixed Term Contract. As a Maximo Specialist, you will be seen as one of the companys resident experts in how Maximo works. In conjunction with IT and business change teams you will be responsible for requirements definition, analysis, and design of Maximo enhancements, automation scripts and integrations. * ESRI GIS Mapping solution * Hi-Affinity CMS * Aurora Streetworks Management system * Waternet Leakage Monitoring system * Oracle Fusion Finance and Procurement system * FLS Visitour Scheduling There is an ambitious road map for the next few years which includes regulatory change, enhancements, small change, and an upgrade to MAS to name a few.
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        FEATURED

        Senior Data Engineer

        Red Engine
        City of London (EC1), EC1V 7LQ
        £75000.00 - £85000.00 per annum
        About Us Hello, we are Red Engine, the team behind the award-winning global brands Flight Club and Electric Shuffle. We're obsessed with disrupting the hospitality industry by creating and delivering the best possible experience - across all venues, products and brands. Our central team covers the full spectrum of skills needed to bring each concept to life from design to marketing, sales to interior design, people and training, to finance, gaming and HR and everything in between. Were not just a team of people, we are dreamers, artists, rocket scientists, content curators, forward thinkers and the industrys finest. We love what we do and are proud to be included in the Sunday Times Best Places to Work 2025.
        About Us Hello, we are Red Engine, the team behind the award-winning global brands Flight Club and Electric Shuffle. We're obsessed with disrupting the hospitality industry by creating and delivering the best possible experience - across all venues, products and brands. Our central team covers the full spectrum of skills needed to bring each concept to life from design to marketing, sales to interior design, people and training, to finance, gaming and HR and everything in between. Were not just a team of people, we are dreamers, artists, rocket scientists, content curators, forward thinkers and the industrys finest. We love what we do and are proud to be included in the Sunday Times Best Places to Work 2025.
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        Engineering Manager

        Stepstone UK
        Southwark, South East London (SE1), SE1 0TA
        Competitive salary
        Company Description At The Stepstone Group, we have a simple yet very important mission: The right job for everyone. Using our data, platform, and technology, we create opportunities for jobseekers and companies around the world to find a perfect match in fair and equitable way. With over 20 brands across 30+ countries, we strive for fair and unbiased hiring. Join our team of 4,000+ employees and be part of reshaping the labour market and becoming the worlds leading job platform. Job Description Join our team and youll be responsible for providing technical leadership to all engineering and development areas across your domain, developing and executing an engineering strategy aligned to the portfolio and global tech strategies.
        Company Description At The Stepstone Group, we have a simple yet very important mission: The right job for everyone. Using our data, platform, and technology, we create opportunities for jobseekers and companies around the world to find a perfect match in fair and equitable way. With over 20 brands across 30+ countries, we strive for fair and unbiased hiring. Join our team of 4,000+ employees and be part of reshaping the labour market and becoming the worlds leading job platform. Job Description Join our team and youll be responsible for providing technical leadership to all engineering and development areas across your domain, developing and executing an engineering strategy aligned to the portfolio and global tech strategies.
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        Senior Python Developer

        Hireful
        Central London, London
        £55k - £62k base salary + great benefits
        Are you a Senior Python Developer looking to help shape the future of how schools use technology to empower learners across the UK? We are searching for a Senior Python Developer / Lead Python Developer who can guide a talented engineering team and push the boundaries of what cloud-native EdTech can be. Fancy taking ownership over building scalable Python applications, driving Agile delivery, and designing robust AWS-based systems using modern Infrastructure-as-Code approaches? Role: Senior Python Developer, Python Software Engineer, Python Developer, Lead Python Developer Location: 100% work from home / Remote Salary: £55k - £62k base plus great benefits
        Are you a Senior Python Developer looking to help shape the future of how schools use technology to empower learners across the UK? We are searching for a Senior Python Developer / Lead Python Developer who can guide a talented engineering team and push the boundaries of what cloud-native EdTech can be. Fancy taking ownership over building scalable Python applications, driving Agile delivery, and designing robust AWS-based systems using modern Infrastructure-as-Code approaches? Role: Senior Python Developer, Python Software Engineer, Python Developer, Lead Python Developer Location: 100% work from home / Remote Salary: £55k - £62k base plus great benefits
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        Frequently Asked Questions

        How many contract API jobs are there in The City, City of London?
        There are 32 contract API jobs within 20 miles of The City, City of London available on Jobsite right now.

        Where in The City, City of London are these contract jobs?
        You can find contract jobs in The City, City (EC4), Hinxton, Shoreditch.

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