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        61 Contract API jobs in City of London + 20 miles

        Workplace Platform Engineer (DocuSign & 365 & API)

        Morson Edge
        City of London, London, EC1A 1AA
        Market related
        We are seeking a Platform Engineer to join the Modern Workplace team at a leading banking client. This team is focused on delivering a flexible, efficient, and seamless digital workplace experience, enabling colleagues to collaborate and perform effectively using enterprise tools such as Microsoft 365 and DocuSign. The successful candidate will be a key contributor to the Productivity Applications portfolio, responsible for configuring, maintaining, and enhancing platforms that support a high-performing digital workplace. Key Responsibilities * Configure, develop, and maintain solutions across the Productivity Applications platform * Contribute to the design and implementation of new digital workplace capabilities * Manage the end-to-end lifecycle of platform solutions, ensuring continuous improvement * Support business-as-usual changes and incremental enhancements
        We are seeking a Platform Engineer to join the Modern Workplace team at a leading banking client. This team is focused on delivering a flexible, efficient, and seamless digital workplace experience, enabling colleagues to collaborate and perform effectively using enterprise tools such as Microsoft 365 and DocuSign. The successful candidate will be a key contributor to the Productivity Applications portfolio, responsible for configuring, maintaining, and enhancing platforms that support a high-performing digital workplace. Key Responsibilities * Configure, develop, and maintain solutions across the Productivity Applications platform * Contribute to the design and implementation of new digital workplace capabilities * Manage the end-to-end lifecycle of platform solutions, ensuring continuous improvement * Support business-as-usual changes and incremental enhancements
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        PREMIUM

        Automation Engineer – Storage & Platform (Python / CI/CD / APIs)

        Essential Consulting
        South East London (SE1)
        Unspecified Competitive Daily Rate - Inside IR35
        Engineering API integrations between systems (REST APIs, authentication, error handling, retries, idempotency) * Hands-on experience with API integration and automation
        Engineering API integrations between systems (REST APIs, authentication, error handling, retries, idempotency) * Hands-on experience with API integration and automation
        more
        We’re looking for a proactive, self-sufficient developer with strong experience in .NET, API development, microservices architecture, and database integration.
        We’re looking for a proactive, self-sufficient developer with strong experience in .NET, API development, microservices architecture, and database integration.
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        FEATURED
        Good understanding of API-led, integration-centric architectures and data-flow modelling * Experience with API gateways, middleware, or enterprise integration platforms
        Good understanding of API-led, integration-centric architectures and data-flow modelling * Experience with API gateways, middleware, or enterprise integration platforms
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        PREMIUM
        Working across API, UI, and integration testing
        Working across API, UI, and integration testing
        NEW
        Lead Integration Architect - 12 Months Contract Outside IR35 £600 to £650 a day - 3 days a week in Dartford Kent - A global powerhouse in the Infrastructure and Built Environment sector is urgently seeking a visionary Integration Architect to spearhead the connectivity for a multi-million-pound Digital Manufacturing Cloud (DMC) transformation. This isn't a maintenance role. You will own the entire integration architecture, acting as the master orchestrator for a complex ecosystem. You will ensure that high-level ERP and HR systems communicate perfectly with the precision-engineered data flows of PLM, MES, and QMS platforms. As an integration Architect you will have the following responsibilities * Define the integration architecture that allows disparate enterprise systems to speak a single, fluent language.
        Lead Integration Architect - 12 Months Contract Outside IR35 £600 to £650 a day - 3 days a week in Dartford Kent - A global powerhouse in the Infrastructure and Built Environment sector is urgently seeking a visionary Integration Architect to spearhead the connectivity for a multi-million-pound Digital Manufacturing Cloud (DMC) transformation. This isn't a maintenance role. You will own the entire integration architecture, acting as the master orchestrator for a complex ecosystem. You will ensure that high-level ERP and HR systems communicate perfectly with the precision-engineered data flows of PLM, MES, and QMS platforms. As an integration Architect you will have the following responsibilities * Define the integration architecture that allows disparate enterprise systems to speak a single, fluent language.
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        FEATURED
        Work with .NET (C#), Azure Integration Services (Logic Apps, API Management, Service Bus, Event Grid), and containerised microservices (Docker, AKS). * Champion best practices for API-led connectivity, event-driven architectures, and pub/sub messaging patterns. * Understanding of integration patterns (pub/sub, API-led, event-driven) and security standards (OAuth2, JWT, TLS, API security).
        Work with .NET (C#), Azure Integration Services (Logic Apps, API Management, Service Bus, Event Grid), and containerised microservices (Docker, AKS). * Champion best practices for API-led connectivity, event-driven architectures, and pub/sub messaging patterns. * Understanding of integration patterns (pub/sub, API-led, event-driven) and security standards (OAuth2, JWT, TLS, API security).
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        Strategic Bid Architect / Pre Sales Solution Architect / Bid Solution Architect / Bid Architect - Solutions - This is a pivotal role in shaping, validating, and presenting complex digital, data, and AI-enabled solutions that are commercially competitive, architecturally robust, and operationally deliverable. Acting as the senior solution leader, the role is accountable for designing and governing advanced, cloud-native, and data-driven architectures for strategic, complex, and high-value bids, showcasing our clients digital design ethos and technical excellence. They ensure that all proposals are aligned to customer outcomes, compliant with requirements, and consistent with enterprise standards and delivery capability - delivering winning, sustainable propositions for our client. Working closely with the Growth and Business Development teams from the earliest stages of the ...
        Strategic Bid Architect / Pre Sales Solution Architect / Bid Solution Architect / Bid Architect - Solutions - This is a pivotal role in shaping, validating, and presenting complex digital, data, and AI-enabled solutions that are commercially competitive, architecturally robust, and operationally deliverable. Acting as the senior solution leader, the role is accountable for designing and governing advanced, cloud-native, and data-driven architectures for strategic, complex, and high-value bids, showcasing our clients digital design ethos and technical excellence. They ensure that all proposals are aligned to customer outcomes, compliant with requirements, and consistent with enterprise standards and delivery capability - delivering winning, sustainable propositions for our client. Working closely with the Growth and Business Development teams from the earliest stages of the ...
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        FEATURED

        Backend Developer - Java

        Infoplus Technologies UK Ltd
        The City, City of London (EC3), EC4R 9AA
        Unspecified
        Role: Backend Developer - Java - Location: Edinburgh / London, UK - Duration: Contract - Your Profile * 510 years of overall software development experience, with minimum 4+ years of hands on Java development * Strong experience with Java 9+ * Proven expertise in Spring Framework (Spring Boot, Spring MVC, Spring Core) * Hands on experience building backend services and APIs and Microservices * Solid understanding of object oriented design, design patterns, and clean code principles * Experience working in Agile / Scrum environments * Strong problem solving and debugging skills * Ability to work effectively in distributed, multi team environments * Experience with SaaS based architectures * Exposure to event driven architecture (Kafka, JMS, or equivalent) * Experience with system integration and enterprise messaging * Knowledge of cloud platforms (GCP preferred)
        Role: Backend Developer - Java - Location: Edinburgh / London, UK - Duration: Contract - Your Profile * 510 years of overall software development experience, with minimum 4+ years of hands on Java development * Strong experience with Java 9+ * Proven expertise in Spring Framework (Spring Boot, Spring MVC, Spring Core) * Hands on experience building backend services and APIs and Microservices * Solid understanding of object oriented design, design patterns, and clean code principles * Experience working in Agile / Scrum environments * Strong problem solving and debugging skills * Ability to work effectively in distributed, multi team environments * Experience with SaaS based architectures * Exposure to event driven architecture (Kafka, JMS, or equivalent) * Experience with system integration and enterprise messaging * Knowledge of cloud platforms (GCP preferred)
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        A global consultancy operating in mobile telecoms and satellite is looking for an Enterprise Architect to lead service and operational transformation across their client programmes. You will own the architectural vision for operational support and service assurance, working closely with client product, engineering and commercial teams to drive measurable improvements in service quality, platform resilience and partner ecosystem integration. * Defining and owning target-state architecture for OSS and service assurance platforms across satellite and terrestrial networks * Designing service assurance frameworks covering fault management, performance monitoring, SLA management, and root cause analysis * Leading the architectural roadmap for satellite and mobile, focused on interoperability and ecosystem enablement
        A global consultancy operating in mobile telecoms and satellite is looking for an Enterprise Architect to lead service and operational transformation across their client programmes. You will own the architectural vision for operational support and service assurance, working closely with client product, engineering and commercial teams to drive measurable improvements in service quality, platform resilience and partner ecosystem integration. * Defining and owning target-state architecture for OSS and service assurance platforms across satellite and terrestrial networks * Designing service assurance frameworks covering fault management, performance monitoring, SLA management, and root cause analysis * Leading the architectural roadmap for satellite and mobile, focused on interoperability and ecosystem enablement
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        Enterprise Architect – Corporate Technology

        Ventula Consulting Limited
        South West London (SW1)
        From £850 to £900 per day
        One of the worlds great FMCGs (FTSE 100) requires an Enterprise Architect in its Corporate Tech function. This role is anchored in Enterprise Architecture and is focused on building and maturing EA capability in an evolving Corporate Functions environment. It combines strong architectural judgement with the ability to partner, influence, and drive pragmatic, outcome-led change in a landscape with emerging maturity and legacy complexity. As an Enterprise Architect with deep expertise in Finance and Corporate Technologies, you will bridge the gap between enterprise technology and key business objectives across corporate functions. You will design and govern architectures that enable enterprise-wide transformation, ensuring alignment with CFO, CHRO, CPO, and General Counsel priorities. Your domain knowledge will drive the evolution of systems for core Finance, HR, Legal, and ...
        One of the worlds great FMCGs (FTSE 100) requires an Enterprise Architect in its Corporate Tech function. This role is anchored in Enterprise Architecture and is focused on building and maturing EA capability in an evolving Corporate Functions environment. It combines strong architectural judgement with the ability to partner, influence, and drive pragmatic, outcome-led change in a landscape with emerging maturity and legacy complexity. As an Enterprise Architect with deep expertise in Finance and Corporate Technologies, you will bridge the gap between enterprise technology and key business objectives across corporate functions. You will design and govern architectures that enable enterprise-wide transformation, ensuring alignment with CFO, CHRO, CPO, and General Counsel priorities. Your domain knowledge will drive the evolution of systems for core Finance, HR, Legal, and ...
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        Contract BI Developer

        Hanson Lee Resourcing Ltd
        City of London (EC2)
        Up to £550 per day
        Were working closely with a London Market Insurance Syndicate to hire an experienced Contract Data Engineer to support the ongoing development and enhancement of its core data environment. This is a hands-on role focused on building and optimising the data platform, data warehouse and wider data ecosystem, helping to improve data quality, accessibility and reporting capability across the Syndicate. This opportunity would suit someone with strong Lloyds / London Market experience and a solid background in Azure-based data engineering. What youll be doing * Build, enhance and support the data ecosystem, including the Syndicate Data Hub * Develop and maintain ETL / ELT pipelines for ingesting, transforming and delivering data * Support the design and evolution of the data model, with a focus on Syndicate-specific requirements
        Were working closely with a London Market Insurance Syndicate to hire an experienced Contract Data Engineer to support the ongoing development and enhancement of its core data environment. This is a hands-on role focused on building and optimising the data platform, data warehouse and wider data ecosystem, helping to improve data quality, accessibility and reporting capability across the Syndicate. This opportunity would suit someone with strong Lloyds / London Market experience and a solid background in Azure-based data engineering. What youll be doing * Build, enhance and support the data ecosystem, including the Syndicate Data Hub * Develop and maintain ETL / ELT pipelines for ingesting, transforming and delivering data * Support the design and evolution of the data model, with a focus on Syndicate-specific requirements
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        Dev Ops SME?

        Randstad Digital
        City of London (EC1)
        £400 - £600 per day
        Senior AWS DevOps Engineer (Test & Infrastructure Resilience) Location: Remote Working - Security Clearance: Must be eligible for SC Clearance - 6 Months Contract £400 to £600 a day inside IR35 - A top-tier consultancy firm is looking for an experienced AWS DevOps Engineer with a strong background in testing to help maintain and evolve Critical National Infrastructure (CNI) for a top UK client. This is a pivotal role in maintaining critical national infrastructure where scalability and resilience are essential. We're looking for a highly skilled DevOps engineer with a strong background in testing (including APIs). The ideal candidate should be self-motivated and results-driven, capable of thriving in an Agile team. You'll need to be comfortable with Confluence for documentation and Jira for project tracking and story management.
        Senior AWS DevOps Engineer (Test & Infrastructure Resilience) Location: Remote Working - Security Clearance: Must be eligible for SC Clearance - 6 Months Contract £400 to £600 a day inside IR35 - A top-tier consultancy firm is looking for an experienced AWS DevOps Engineer with a strong background in testing to help maintain and evolve Critical National Infrastructure (CNI) for a top UK client. This is a pivotal role in maintaining critical national infrastructure where scalability and resilience are essential. We're looking for a highly skilled DevOps engineer with a strong background in testing (including APIs). The ideal candidate should be self-motivated and results-driven, capable of thriving in an Agile team. You'll need to be comfortable with Confluence for documentation and Jira for project tracking and story management.
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        FEATURED
        SAP Solution Architect (S/4HANA | Supply Chain) Dartford, Kent (3 days onsite) Contract: 12-18 months £600-£650/day (Outside IR35) The Opportunity - We're currently recruiting for a SAP Solution Architect to join a major transformation programme within a complex manufacturing environment. This role will take ownership of SAP solution design across key enterprise capabilities, with a strong focus on supply chain, logistics, and manufacturing processes. Key Responsibilities * Lead end-to-end SAP solution architecture across core domains (ERP, supply chain, warehouse, quality, etc.) * Define and design integration architecture with systems such as PLM, MES, and data platforms * Work closely with business and technical teams across design, procurement, and build phases * Drive solution standardisation and SAP-first approach across capabilities
        SAP Solution Architect (S/4HANA | Supply Chain) Dartford, Kent (3 days onsite) Contract: 12-18 months £600-£650/day (Outside IR35) The Opportunity - We're currently recruiting for a SAP Solution Architect to join a major transformation programme within a complex manufacturing environment. This role will take ownership of SAP solution design across key enterprise capabilities, with a strong focus on supply chain, logistics, and manufacturing processes. Key Responsibilities * Lead end-to-end SAP solution architecture across core domains (ERP, supply chain, warehouse, quality, etc.) * Define and design integration architecture with systems such as PLM, MES, and data platforms * Work closely with business and technical teams across design, procurement, and build phases * Drive solution standardisation and SAP-first approach across capabilities
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        FEATURED
        Remote UK - Duration: 6 months (initially) Inside IR35 - Umbrella only - Our client, a reputable organisation, is hiring for two ServiceNow IRM Specialists to join a dynamic project. This is a fantastic opportunity to work remotely within the UK on a key initiative to optimise enterprise risk management and compliance processes. * Lead the design, configuration, and implementation of ServiceNow Integrated Risk Management (IRM) modules. * Collaborate with stakeholders to enhance governance, streamline workflows, and improve compliance maturity. * Manage ongoing optimisation of the platform, ensuring it effectively supports risk registers, control frameworks, policy lifecycle management, and automation. * Act as a subject matter expert on risk-related ServiceNow modules, providing guidance and best practices.
        Remote UK - Duration: 6 months (initially) Inside IR35 - Umbrella only - Our client, a reputable organisation, is hiring for two ServiceNow IRM Specialists to join a dynamic project. This is a fantastic opportunity to work remotely within the UK on a key initiative to optimise enterprise risk management and compliance processes. * Lead the design, configuration, and implementation of ServiceNow Integrated Risk Management (IRM) modules. * Collaborate with stakeholders to enhance governance, streamline workflows, and improve compliance maturity. * Manage ongoing optimisation of the platform, ensuring it effectively supports risk registers, control frameworks, policy lifecycle management, and automation. * Act as a subject matter expert on risk-related ServiceNow modules, providing guidance and best practices.
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        FEATURED
        12 months - Croydon - x1 day a week x4 remote - Inside IR35 - Umbrella only - Active SC clearance required - Are you passionate about building reliable data pipelines and microservices? Our client, a leading organisation in the IT sector, is hiring for a talented Data Engineer to join their innovative team. This is a fantastic opportunity to work on cutting-edge data solutions, collaborating with skilled professionals to deliver high-quality results. * Design, develop, and maintain scalable data pipelines and microservices using Java and Spring Boot. * Containerise applications with Docker and deploy them efficiently. * Integrate data from multiple sources, ensuring flows are clean, reliable, and consistent. * Optimise pipeline performance, reliability, and observability. * Collaborate with Data Scientists, Analysts, and Software Engineers to create robust data solutions.
        12 months - Croydon - x1 day a week x4 remote - Inside IR35 - Umbrella only - Active SC clearance required - Are you passionate about building reliable data pipelines and microservices? Our client, a leading organisation in the IT sector, is hiring for a talented Data Engineer to join their innovative team. This is a fantastic opportunity to work on cutting-edge data solutions, collaborating with skilled professionals to deliver high-quality results. * Design, develop, and maintain scalable data pipelines and microservices using Java and Spring Boot. * Containerise applications with Docker and deploy them efficiently. * Integrate data from multiple sources, ensuring flows are clean, reliable, and consistent. * Optimise pipeline performance, reliability, and observability. * Collaborate with Data Scientists, Analysts, and Software Engineers to create robust data solutions.
        more
        FEATURED

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        What is the average salary for API in City of London?

        Average salary per year
        £82,499

        The average salary for a API in City of London is £82,499. API in City of London salaries range from £64,999 to £92,499.

        Frequently Asked Questions

        How many contract API jobs are there in City of London?
        There are 61 contract API jobs within 20 miles of City of London available on CWJobs right now.

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