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        56 API jobs in London + 20 miles

        Senior Python Developer

        Experis
        City of London (EC1)
        £500 - £540 per day
        Develop and maintain Python code for data processing, API development, and integration with the Azure Databricks environment.
        Develop and maintain Python code for data processing, API development, and integration with the Azure Databricks environment.
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        FEATURED
        Hybrid- London - Up to £100,000 + benefits - Overview - We are hiring a Senior Software Engineer to join a growing Digital Platform function within a technology-driven organisation undergoing continued international expansion. This role sits within a newly formed platform squad focused on strengthening, stabilising, and evolving a modern web platform built on a Next.js stack. The organisation is investing in long-term platform scalability (8-10 year vision), improving engineering standards, tooling, CI/CD, testing, and observability. You will play a key role in ensuring engineering teams can deliver product work efficiently and release with confidence, while helping shape platform capabilities, technical direction, and best practices. This is primarily an individual contributor role with potential mentoring responsibilities. The Role
        Hybrid- London - Up to £100,000 + benefits - Overview - We are hiring a Senior Software Engineer to join a growing Digital Platform function within a technology-driven organisation undergoing continued international expansion. This role sits within a newly formed platform squad focused on strengthening, stabilising, and evolving a modern web platform built on a Next.js stack. The organisation is investing in long-term platform scalability (8-10 year vision), improving engineering standards, tooling, CI/CD, testing, and observability. You will play a key role in ensuring engineering teams can deliver product work efficiently and release with confidence, while helping shape platform capabilities, technical direction, and best practices. This is primarily an individual contributor role with potential mentoring responsibilities. The Role
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        We're partnering with a high-growth B2B PropTech SaaS business that's transforming how property professionals access and leverage land data across the UK. In just a few years, the company has built one of the most advanced property data platforms in the market, integrating thousands of data sources and processing terabytes of information with sub-24-hour latency. With strong product-market fit, continued revenue growth, and ambitious scaling plans, they're now hiring a Lead Full Stack Engineer to help shape the next phase of the platform. This is a hands-on leadership role within an engineering-led, collaborative environment, ideal for someone who enjoys balancing architectural ownership with meaningful day-to-day coding. The Role - As Lead Full Stack Engineer, you'll combine deep technical expertise with strong leadership and architectural oversight.
        We're partnering with a high-growth B2B PropTech SaaS business that's transforming how property professionals access and leverage land data across the UK. In just a few years, the company has built one of the most advanced property data platforms in the market, integrating thousands of data sources and processing terabytes of information with sub-24-hour latency. With strong product-market fit, continued revenue growth, and ambitious scaling plans, they're now hiring a Lead Full Stack Engineer to help shape the next phase of the platform. This is a hands-on leadership role within an engineering-led, collaborative environment, ideal for someone who enjoys balancing architectural ownership with meaningful day-to-day coding. The Role - As Lead Full Stack Engineer, you'll combine deep technical expertise with strong leadership and architectural oversight.
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        Hybrid- London - Up to £75,000 - Overview - We are looking for a Full Stack Software Engineer to join a growing Digital Platform team within a technology-driven organisation expanding internationally. This role sits within a modern platform squad responsible for building, improving, and maintaining a customer-facing web platform built on a Next.js stack. The organisation is investing heavily in platform quality, developer experience, CI/CD, testing, and observability to support long-term scalability. You will contribute to strengthening the platform that enables multiple product squads to deliver features reliably and release with confidence. This is a hands-on engineering role with strong opportunities to grow technically and gain exposure to platform thinking, modern tooling, and large-scale web delivery. The Role
        Hybrid- London - Up to £75,000 - Overview - We are looking for a Full Stack Software Engineer to join a growing Digital Platform team within a technology-driven organisation expanding internationally. This role sits within a modern platform squad responsible for building, improving, and maintaining a customer-facing web platform built on a Next.js stack. The organisation is investing heavily in platform quality, developer experience, CI/CD, testing, and observability to support long-term scalability. You will contribute to strengthening the platform that enables multiple product squads to deliver features reliably and release with confidence. This is a hands-on engineering role with strong opportunities to grow technically and gain exposure to platform thinking, modern tooling, and large-scale web delivery. The Role
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        Overview Lead the Analysis, Portfolio and Investment (API) Practice within the Asset and Network Planning directorate for the M25 Strategic Road Network, translating asset condition, performance, risk, cost intelligence and whole-life carbon impacts into contract-compliant investment strategies, effective maintenance approaches and efficient renewal programmes. * Lead and govern the API practice, setting priorities and standards and owning products, service outputs, assurance, peer review and sign-off routes.
        Overview Lead the Analysis, Portfolio and Investment (API) Practice within the Asset and Network Planning directorate for the M25 Strategic Road Network, translating asset condition, performance, risk, cost intelligence and whole-life carbon impacts into contract-compliant investment strategies, effective maintenance approaches and efficient renewal programmes. * Lead and govern the API practice, setting priorities and standards and owning products, service outputs, assurance, peer review and sign-off routes.
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        Job Title: Guidewire Business Analyst Commercial Insurance - Location: London- 1 day - Job Type: 6 months- Inside IR35 - Role Overview - We are seeking a Guidewire Business Analyst with strong experience in Commercial Insurance (Policy, Billing, Claims) to bridge business needs and technology delivery. The ideal candidate will work closely with stakeholders to define requirements, support Guidewire implementations, and drive process improvements. Key Responsibilities - Gather and document business and functional requirements for Guidewire implementations - Work with underwriting, claims, and operations teams - Translate requirements into functional specifications and user stories - Support end-to-end Guidewire implementations and enhancements - Collaborate with development, QA, and architecture teams - Support UAT and defect management - Conduct stakeholder workshops
        Job Title: Guidewire Business Analyst Commercial Insurance - Location: London- 1 day - Job Type: 6 months- Inside IR35 - Role Overview - We are seeking a Guidewire Business Analyst with strong experience in Commercial Insurance (Policy, Billing, Claims) to bridge business needs and technology delivery. The ideal candidate will work closely with stakeholders to define requirements, support Guidewire implementations, and drive process improvements. Key Responsibilities - Gather and document business and functional requirements for Guidewire implementations - Work with underwriting, claims, and operations teams - Translate requirements into functional specifications and user stories - Support end-to-end Guidewire implementations and enhancements - Collaborate with development, QA, and architecture teams - Support UAT and defect management - Conduct stakeholder workshops
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        NEW

        ML Ops / Data Engineer

        CMC Markets UK Plc
        The City, City of London (EC3), EC3A 7BX
        Unspecified
        Role Overview - Were hiring an ML Ops Engineer / Data Engineerto own the reliability, scalability, and operational integrity of our machine-learning systems in research & production. This role sits at the intersection of data engineering and ML infrastructure: youll design and operate data pipelines that feed models, and youll build the tooling that trains, deploys, monitors, and retrains them. Youll work closely with research engineers and product teams, taking models from experimentation to production-grade systems with clear SLAs, reproducibility guarantees, and observable behaviour. This is not a research role; it is a hands-on engineering role focused on making ML systems work reliably at scale. What Youll Work On - ML lifecycle infrastructure * Productionizing models: packaging, deployment, versioning, and rollback
        Role Overview - Were hiring an ML Ops Engineer / Data Engineerto own the reliability, scalability, and operational integrity of our machine-learning systems in research & production. This role sits at the intersection of data engineering and ML infrastructure: youll design and operate data pipelines that feed models, and youll build the tooling that trains, deploys, monitors, and retrains them. Youll work closely with research engineers and product teams, taking models from experimentation to production-grade systems with clear SLAs, reproducibility guarantees, and observable behaviour. This is not a research role; it is a hands-on engineering role focused on making ML systems work reliably at scale. What Youll Work On - ML lifecycle infrastructure * Productionizing models: packaging, deployment, versioning, and rollback
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        FEATURED
        About this role - Business Unit Overview - BlackRock Global Markets and Index Investments (BGM) brings together BlackRocks Index Investments, Cash Management, Global Trading, ETF Markets, Securities Lending, and Financing & Financial Resource Management businesses. * World class talent, operating at the intersection of investment insight, markets expertise, risk management and process design * Technology at the heart of our processes, with in-business tech teams that create cutting-edge IP, providing an advantage in quality, scale, and risk control * A focus on transforming markets, driving and advocating for more accessible, resilient, and transparent markets to deliver more choice and lower costs for investors - Your Role and Impact - We have a superb opportunity for a Portfolio Manager to join our London Index Equity Portfolio Management team.
        About this role - Business Unit Overview - BlackRock Global Markets and Index Investments (BGM) brings together BlackRocks Index Investments, Cash Management, Global Trading, ETF Markets, Securities Lending, and Financing & Financial Resource Management businesses. * World class talent, operating at the intersection of investment insight, markets expertise, risk management and process design * Technology at the heart of our processes, with in-business tech teams that create cutting-edge IP, providing an advantage in quality, scale, and risk control * A focus on transforming markets, driving and advocating for more accessible, resilient, and transparent markets to deliver more choice and lower costs for investors - Your Role and Impact - We have a superb opportunity for a Portfolio Manager to join our London Index Equity Portfolio Management team.
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        Junior Project Manager

        REC SOLUTIONS LIMITED
        The City, City of London (EC4), EC4N
        From £50,000 to £60,000 per annum Plus benefits and discretionary bonu
        About the Role - (Junior Project Manager OMS / PMS / FinTech / Trading / Saas / Financial Services) We are seeking a motivated Junior Project Manager to support the delivery of technology initiatives across my clients Order Management Systems (OMS), Portfolio Management Systems (PMS), and trading platforms. This role is ideal for someone looking to grow their career in FinTech project delivery / Saas in financial services, working closely with trading desks, product teams, and engineering. You will assist in coordinating projects that improve trading workflows, system integrations, and operational efficiency across the investment platform. Key Responsibilities - (Junior Project Manager OMS / PMS / FinTech / Trading / Saas / Financial Services) * Support the planning, coordination, and delivery of projects across OMS, PMS, and trading technology platforms
        About the Role - (Junior Project Manager OMS / PMS / FinTech / Trading / Saas / Financial Services) We are seeking a motivated Junior Project Manager to support the delivery of technology initiatives across my clients Order Management Systems (OMS), Portfolio Management Systems (PMS), and trading platforms. This role is ideal for someone looking to grow their career in FinTech project delivery / Saas in financial services, working closely with trading desks, product teams, and engineering. You will assist in coordinating projects that improve trading workflows, system integrations, and operational efficiency across the investment platform. Key Responsibilities - (Junior Project Manager OMS / PMS / FinTech / Trading / Saas / Financial Services) * Support the planning, coordination, and delivery of projects across OMS, PMS, and trading technology platforms
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        Forvis Mazars is a leading global professional services network providing audit & assurance, tax, and advisory services. Forvis Mazars in the UK spans 14 offices across the nation and has over 3,400 professionals, with 190 partners. We have a clear purpose and a shared commitment to shape a better future. You'll join a collaborative and inclusive team where you're supported to grow your skills, explore new opportunities, and contribute from day one. You'll work with a diverse client base, develop meaningful connections, and gain experience that extends beyond your local team. Together, we grow, belong and impact. In Europe, Forvis Mazars has developed aleading team in Corporate Treasury Advisory with 60+ dedicated consultants supporting Treasury & Financing departments or CFO in 4 mains areas: (i) Treasury Transformation, (ii) Liquidity Optimisation; (iii) Financial Risk ...
        Forvis Mazars is a leading global professional services network providing audit & assurance, tax, and advisory services. Forvis Mazars in the UK spans 14 offices across the nation and has over 3,400 professionals, with 190 partners. We have a clear purpose and a shared commitment to shape a better future. You'll join a collaborative and inclusive team where you're supported to grow your skills, explore new opportunities, and contribute from day one. You'll work with a diverse client base, develop meaningful connections, and gain experience that extends beyond your local team. Together, we grow, belong and impact. In Europe, Forvis Mazars has developed aleading team in Corporate Treasury Advisory with 60+ dedicated consultants supporting Treasury & Financing departments or CFO in 4 mains areas: (i) Treasury Transformation, (ii) Liquidity Optimisation; (iii) Financial Risk ...
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        Competitive + Bonus - Permanent full time - Remote, UK - Are you an expert in tronc schemes, service charge distribution, and payroll compliance? Do you enjoy combining consultancy, data analysis, and client-facing project delivery? IRIS Software Group is seeking an experiencedImplementation Consultantto lead the delivery of our Troncmaster platform to hospitality clients across the UK. About IRIS - IRIS Software Group is one of the UKs largest privately held software companies. We provide mission-critical software to over 120,000 customers across finance, HR, payroll, education and accountancy sectors. Around 20% of the UK workforce is paid through IRIS payroll solutions. Our purpose is simple: to be the most trusted provider of mission-critical software and services, ensuring customers get it right first time, every time. The Role
        Competitive + Bonus - Permanent full time - Remote, UK - Are you an expert in tronc schemes, service charge distribution, and payroll compliance? Do you enjoy combining consultancy, data analysis, and client-facing project delivery? IRIS Software Group is seeking an experiencedImplementation Consultantto lead the delivery of our Troncmaster platform to hospitality clients across the UK. About IRIS - IRIS Software Group is one of the UKs largest privately held software companies. We provide mission-critical software to over 120,000 customers across finance, HR, payroll, education and accountancy sectors. Around 20% of the UK workforce is paid through IRIS payroll solutions. Our purpose is simple: to be the most trusted provider of mission-critical software and services, ensuring customers get it right first time, every time. The Role
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        FEATURED
        Location: Home-based with occasional travel to London - Start Date: Mid-May | Duration: 12 months - Daily Rate: £412 - Sector: Public Industry - Health | SC Clearance Required - Eligibility: UK Nationals with 5+ years residency - We are seeking a highly skilled Oracle Cloud Payroll Data Migration Consultant to lead full-cycle data migration workstreams, ensuring data integrity, accuracy, and successful go-live delivery. * Lead end-to-end Oracle Payroll Cloud data migration, including elements, balances, costing, fast formulas, and HCM objects. * Use HDL, HCM Extracts, Spreadsheet Loaders, HSDL, Payroll Batch Loader, FBDL, REST APIs, and SQL for migration and validation. * Prepare and maintain mapping specifications, data dictionaries, reconciliation packs, and documentation for multiple migration cycles. * Support SIT, UAT, mock migrations, parallel payroll runs, cutover planning, and ...
        Location: Home-based with occasional travel to London - Start Date: Mid-May | Duration: 12 months - Daily Rate: £412 - Sector: Public Industry - Health | SC Clearance Required - Eligibility: UK Nationals with 5+ years residency - We are seeking a highly skilled Oracle Cloud Payroll Data Migration Consultant to lead full-cycle data migration workstreams, ensuring data integrity, accuracy, and successful go-live delivery. * Lead end-to-end Oracle Payroll Cloud data migration, including elements, balances, costing, fast formulas, and HCM objects. * Use HDL, HCM Extracts, Spreadsheet Loaders, HSDL, Payroll Batch Loader, FBDL, REST APIs, and SQL for migration and validation. * Prepare and maintain mapping specifications, data dictionaries, reconciliation packs, and documentation for multiple migration cycles. * Support SIT, UAT, mock migrations, parallel payroll runs, cutover planning, and ...
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        FEATURED

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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 API jobs are there in London?
        There are 56 API jobs within 20 miles of London available on CityJobs right now.

        Where in London are these jobs?
        You can find jobs in City of London, Harlow, Central London.

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