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123 Contract API jobs in Datchet Common + 20 miles
Node Developer Remote Working - Lynx are currently working with a large IT consultancy to help them source a Node Developer. Our client is large global Consultancy who work with enterprise clients, solving their business and technology problems using cutting edge Solutions. Design, implement, and manage backend applications and APIs using Node.js - Work with RESTful APIs and external services to enhance system capabilities and connectivity - Perform unit and integration testing, troubleshoot issues, and maintain high code reliability - Collaborating with stakeholders and leadership to understand and refine project requirements - Working on diverse projects and challenges in a consultancy capacity - Advocating for and contributing to best practices in software engineering across teams and projects - Previous experience working within a consulting organisation is essent
Node Developer Remote Working - Lynx are currently working with a large IT consultancy to help them source a Node Developer. Our client is large global Consultancy who work with enterprise clients, solving their business and technology problems using cutting edge Solutions. Design, implement, and manage backend applications and APIs using Node.js - Work with RESTful APIs and external services to enhance system capabilities and connectivity - Perform unit and integration testing, troubleshoot issues, and maintain high code reliability - Collaborating with stakeholders and leadership to understand and refine project requirements - Working on diverse projects and challenges in a consultancy capacity - Advocating for and contributing to best practices in software engineering across teams and projects - Previous experience working within a consulting organisation is essent
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Front End Developer
Front End Developer
Sanderson Government and Defence
EC1, City of London
£400 - £500 per day + outside IR35
Details - Clearance required: SC Cleared - IR35 Status: Outside IR35 - Start date: 01/12/2025 - Pay rate: 400-500/d - We are forming a new Data Team to deliver a unified, user-friendly interface that consolidates dashboards, reports, and analytical outputs from across the organisation. This 'single pane of glass' will serve as the central hub for stakeholders to explore data, monitor performance, and make informed decisions. As the Front-End Developer, you will play a pivotal role in designing and building this interface from the ground up. You'll work closely with Data Analysts, Data Scientists, Engineers, and Business Analysts to understand their outputs and translate them into intuitive, dynamic visual experiences. Your work will directly influence how data is consumed and acted upon across the organisation. Responsibilities
Details - Clearance required: SC Cleared - IR35 Status: Outside IR35 - Start date: 01/12/2025 - Pay rate: 400-500/d - We are forming a new Data Team to deliver a unified, user-friendly interface that consolidates dashboards, reports, and analytical outputs from across the organisation. This 'single pane of glass' will serve as the central hub for stakeholders to explore data, monitor performance, and make informed decisions. As the Front-End Developer, you will play a pivotal role in designing and building this interface from the ground up. You'll work closely with Data Analysts, Data Scientists, Engineers, and Business Analysts to understand their outputs and translate them into intuitive, dynamic visual experiences. Your work will directly influence how data is consumed and acted upon across the organisation. Responsibilities
FEATURED
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Senior Backend Engineer
Senior Backend Engineer
Ncounter LTD
SW1, South West London
From £120,000 to £160,000 per annum Equity and package
Product-Focused Backend Engineer Functional Programming & Distributed Systems - London (Hybrid) | £120,000£160,000 + Equity - At Ncounter, were partnering with a cutting-edge AI company on a mission to redefine how professionals in highly regulated industries interact with complex, multi-modal data. Their platform empowers users to deploy custom no-code AI agents that produce verifiable outputs with full transparency - ensuring trust, compliance, and control remain central to every decision. As a Backend Engineer, youll join a growing team working at the forefront of AI infrastructure. This isnt just about clean code or strong delivery - its about ownership, product intuition, and building for scale. Youll be part of a lean, high-calibre engineering function where every member contributes to planning, testing, analysis, and execution.
Product-Focused Backend Engineer Functional Programming & Distributed Systems - London (Hybrid) | £120,000£160,000 + Equity - At Ncounter, were partnering with a cutting-edge AI company on a mission to redefine how professionals in highly regulated industries interact with complex, multi-modal data. Their platform empowers users to deploy custom no-code AI agents that produce verifiable outputs with full transparency - ensuring trust, compliance, and control remain central to every decision. As a Backend Engineer, youll join a growing team working at the forefront of AI infrastructure. This isnt just about clean code or strong delivery - its about ownership, product intuition, and building for scale. Youll be part of a lean, high-calibre engineering function where every member contributes to planning, testing, analysis, and execution.
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Data Integration Manager - Contract Type:Permanent - About the Role - We're looking for an experienced Data Integration Manager to take ownership of how data moves, integrates, and performs across our business. This is a strategic role that sits at the intersection of technology, operations, and business value, ensuring our financial, commercial, and operational data flows are reliable, accurate, and enable smarter decision-making. You'll be the technical owner of our integration partnerships, lead a small specialist team, and work closely with Finance, Operations, and Commercial stakeholders to modernise processes through better data. If you're someone who understands both the technical complexity of enterprise data and the business outcomes it should deliver, we'd love to hear from you. What You'll Be Doing - Leading Enterprise Integration & Data Operations
Data Integration Manager - Contract Type:Permanent - About the Role - We're looking for an experienced Data Integration Manager to take ownership of how data moves, integrates, and performs across our business. This is a strategic role that sits at the intersection of technology, operations, and business value, ensuring our financial, commercial, and operational data flows are reliable, accurate, and enable smarter decision-making. You'll be the technical owner of our integration partnerships, lead a small specialist team, and work closely with Finance, Operations, and Commercial stakeholders to modernise processes through better data. If you're someone who understands both the technical complexity of enterprise data and the business outcomes it should deliver, we'd love to hear from you. What You'll Be Doing - Leading Enterprise Integration & Data Operations
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We are looking for an enthusiastic and proactive Automation Tester with Python and Pytest experience to join our fantastic fintech client, largely remote with get togethers once a month in central London! This Automation Tester will be backend-focused, testing the server-side components, ensuring that the database (SQL), APIs, and business logic function correctly and efficiently. * Backend Automation testing skills with Python and Pytest. * Solid SQL skills and experience with relational databases. * Solid experience in automation testing using tools such as Selenium, Java, PHP, Go, or similar technologies. * Experience with Postman, SOAP UI, and Cucumber. * Batch processing experience. * Financial services / fintech experience. If you're passionate about testing, automation, and continuous learning, we would love to hear from you!
We are looking for an enthusiastic and proactive Automation Tester with Python and Pytest experience to join our fantastic fintech client, largely remote with get togethers once a month in central London! This Automation Tester will be backend-focused, testing the server-side components, ensuring that the database (SQL), APIs, and business logic function correctly and efficiently. * Backend Automation testing skills with Python and Pytest. * Solid SQL skills and experience with relational databases. * Solid experience in automation testing using tools such as Selenium, Java, PHP, Go, or similar technologies. * Experience with Postman, SOAP UI, and Cucumber. * Batch processing experience. * Financial services / fintech experience. If you're passionate about testing, automation, and continuous learning, we would love to hear from you!
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Senior Security Engineer CIAM
Senior Security Engineer CIAM
Sanderson Recruitment
EC1, City of London
£100000 - £120000 per annum + Bonus and benefits
Job Role: Senior Security Engineer - CIAM - Location: Hybrid - City of London - Salary: £100,000 - £120,000 + Bonus - Are you an experienced Security Engineer with a passion for safeguarding systems and driving innovation in identity and access management? Do you thrive in complex environments where you can solve critical security challenges and influence long-term strategy? If you're driven by excellence, collaboration, and the opportunity to make an impact on a global financial institution, this could be the perfect role for you. Join us as a Senior Security Engineer, where you'll help shape a market-leading digital platform and deliver secure, cutting-edge customer experiences. * Strong hands-on expertise with Hardware Security Modules (HSM), AWS Secrets Manager, and certificate lifecycle management (rotation, revocation, automation)
Job Role: Senior Security Engineer - CIAM - Location: Hybrid - City of London - Salary: £100,000 - £120,000 + Bonus - Are you an experienced Security Engineer with a passion for safeguarding systems and driving innovation in identity and access management? Do you thrive in complex environments where you can solve critical security challenges and influence long-term strategy? If you're driven by excellence, collaboration, and the opportunity to make an impact on a global financial institution, this could be the perfect role for you. Join us as a Senior Security Engineer, where you'll help shape a market-leading digital platform and deliver secure, cutting-edge customer experiences. * Strong hands-on expertise with Hardware Security Modules (HSM), AWS Secrets Manager, and certificate lifecycle management (rotation, revocation, automation)
FEATURED
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Systems Engineer - Power Platforms
Systems Engineer - Power Platforms
Adept Resourcing Engineering
EC1, City of London
£50000 - £70000 per annum
Role: Systems Engineer (Power Platform Specialist) Location: London - Recruiter: Adept Resourcing, on behalf of our client - Role Purpose - Adept Resourcing are recruiting on behalf of our client for a Systems Engineer (Power Platform Specialist). The successful candidate will collaborate across departments to automate repetitive tasks, streamline business processes, and provide technical support for Power Platform solutions. Key Responsibilities * Monitor and support existing Power Platform applications, debugging issues and optimising performance. * Integrate Power Platform with Azure services, Microsoft 365, and secure APIs with third-party systems. * Design, develop, and test automation solutions to improve efficiency. * Build scripts, workflows, or bots to automate tasks. * Collaborate with business stakeholders and automation developers to deliver scalable solut
Role: Systems Engineer (Power Platform Specialist) Location: London - Recruiter: Adept Resourcing, on behalf of our client - Role Purpose - Adept Resourcing are recruiting on behalf of our client for a Systems Engineer (Power Platform Specialist). The successful candidate will collaborate across departments to automate repetitive tasks, streamline business processes, and provide technical support for Power Platform solutions. Key Responsibilities * Monitor and support existing Power Platform applications, debugging issues and optimising performance. * Integrate Power Platform with Azure services, Microsoft 365, and secure APIs with third-party systems. * Design, develop, and test automation solutions to improve efficiency. * Build scripts, workflows, or bots to automate tasks. * Collaborate with business stakeholders and automation developers to deliver scalable solut
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Permanent - Location: UK - Remote - Salary: £70,000 - £80,000 (+ benefits) Skills: Team Management, Python, Java, CI/CD, BDD (Cucumber), Energy / Financial Trading experience (desirable) We're recruiting a Lead Automation Tester for a leading software company that develops advanced solutions for trading and risk management across global financial and energy markets. This is a fantastic opportunity for an experienced Automation Engineer with proven team leadership or management experience to take ownership of automation practices and guide a small, skilled team. You'll play a key role in driving an automation-first culture, ensuring quality and scalability across complex, high-volume systems. This is a UK based fully remote role. What you'll bring * Programming & Scripting: Python, Java, JavaScript, C++, Scriban * Web Technologies: RESTful APIs, HTTP, JSON, HTML, CSS,
Permanent - Location: UK - Remote - Salary: £70,000 - £80,000 (+ benefits) Skills: Team Management, Python, Java, CI/CD, BDD (Cucumber), Energy / Financial Trading experience (desirable) We're recruiting a Lead Automation Tester for a leading software company that develops advanced solutions for trading and risk management across global financial and energy markets. This is a fantastic opportunity for an experienced Automation Engineer with proven team leadership or management experience to take ownership of automation practices and guide a small, skilled team. You'll play a key role in driving an automation-first culture, ensuring quality and scalability across complex, high-volume systems. This is a UK based fully remote role. What you'll bring * Programming & Scripting: Python, Java, JavaScript, C++, Scriban * Web Technologies: RESTful APIs, HTTP, JSON, HTML, CSS,
Automation Tester - Permanent - Location: UK - Remote - Salary: £55,000 - £65,000 (+ benefits) Skills: Python, Java, CI/CD, BDD (Cucumber), Energy / Financial Trading experience (desirable) We are looking to recruit an Automation Tester for a leading software company that delivers advanced solutions for trading and risk management across global financial and energy markets. This is a UK based fully remote role. What you'll bring * Programming & Scripting: Python, Java, JavaScript, C++, Scriban * Web Technologies: RESTful APIs, HTTP, JSON, HTML, CSS, Node.js * Databases: SQL Server, MySQL, PostgreSQL, MongoDB * Tools & Frameworks: Git, Docker, Jenkins, Kubernetes, Agile (Scrum & Kanban), JIRA, Pytest, Powershell * Operating Systems: Linux, Windows * CI/CD pipelines and debugging expertise * BDD frameworks such as Cucumber * Strong problem-solving mindset and collaborat
Automation Tester - Permanent - Location: UK - Remote - Salary: £55,000 - £65,000 (+ benefits) Skills: Python, Java, CI/CD, BDD (Cucumber), Energy / Financial Trading experience (desirable) We are looking to recruit an Automation Tester for a leading software company that delivers advanced solutions for trading and risk management across global financial and energy markets. This is a UK based fully remote role. What you'll bring * Programming & Scripting: Python, Java, JavaScript, C++, Scriban * Web Technologies: RESTful APIs, HTTP, JSON, HTML, CSS, Node.js * Databases: SQL Server, MySQL, PostgreSQL, MongoDB * Tools & Frameworks: Git, Docker, Jenkins, Kubernetes, Agile (Scrum & Kanban), JIRA, Pytest, Powershell * Operating Systems: Linux, Windows * CI/CD pipelines and debugging expertise * BDD frameworks such as Cucumber * Strong problem-solving mindset and collaborat
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We are delighted to be partnering with a successful technology consultancy that is expanding its Software Development team. This is an excellent opportunity for a proactive and committed Software Developer with expertise in .NET (C# / ASP.NET), modern JavaScript frameworks, and SQL to contribute to impactful projects across a diverse client base. About the role - As a Software Developer, you will be working on the development, and maintenance of their internal software product, ensuring seamless integrations into their clients systems. You'll also get involved with external projects, collaborating closely with clients to understand their needs, and design effective solutions. This role blends hands-on technical work with client interaction, giving you the chance to make a visible impact. Key Responsibilities
We are delighted to be partnering with a successful technology consultancy that is expanding its Software Development team. This is an excellent opportunity for a proactive and committed Software Developer with expertise in .NET (C# / ASP.NET), modern JavaScript frameworks, and SQL to contribute to impactful projects across a diverse client base. About the role - As a Software Developer, you will be working on the development, and maintenance of their internal software product, ensuring seamless integrations into their clients systems. You'll also get involved with external projects, collaborating closely with clients to understand their needs, and design effective solutions. This role blends hands-on technical work with client interaction, giving you the chance to make a visible impact. Key Responsibilities
FEATURED
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Marketing Manager Technology
Marketing Manager Technology
Staffworx Limited
Chiswick, W4
market rates, outside IR35, 1-2 days week on site
MarTech Marketing Technology Consultant - contract, outside IR35 - NOTE: This is a mid-level consultant role, looking for someone with 4-5 years relevant experience, this is not a head/lead or programme mgt position, hands on MarTech advisory consultant role. Working for upcoming business technology consulting firm with Enterprise client in the Telco and Digital Commerce sectors. You will work with the client to bridge the gap between marketing and technology, supporting the client in assessing, implementing, and optimizing marketing technology solutions to enhance our clients' marketing strategies and operations. This role requires a deep understanding of marketing technology landscapes, strong analytical skills, and the ability to collaborate with cross-functional teams. About the Role - Required skills and experience: 4-5 years in Digital Marketing Technology: as a
MarTech Marketing Technology Consultant - contract, outside IR35 - NOTE: This is a mid-level consultant role, looking for someone with 4-5 years relevant experience, this is not a head/lead or programme mgt position, hands on MarTech advisory consultant role. Working for upcoming business technology consulting firm with Enterprise client in the Telco and Digital Commerce sectors. You will work with the client to bridge the gap between marketing and technology, supporting the client in assessing, implementing, and optimizing marketing technology solutions to enhance our clients' marketing strategies and operations. This role requires a deep understanding of marketing technology landscapes, strong analytical skills, and the ability to collaborate with cross-functional teams. About the Role - Required skills and experience: 4-5 years in Digital Marketing Technology: as a
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Senior Full Stack Engineer
Senior Full Stack Engineer
REVYBE IT RECRUITMENT LIMITED
EC1, City of London
From £100,000 to £120,000 per annum + Shares
London AI Start-up - Up to £120,000 + Shares + Private Healthcare + Pension - Were working with a well-funded AI start-up in London thats gearing up for huge growth. Theyre expecting to scale 10x over the next 18 months. Theyre now looking for a Senior Full-Stack Engineer to help design and build the next generation of their AI-driven platform. Reporting directly into the CTO and collaborating closely with product and research teams, this is a unique chance to take ownership across the stack and make a lasting impact in a company at the forefront of applied AI. The role - This isnt your standard engineering role youll be working end-to-end across frontend, backend, and cloud infrastructure. Youll build sleek, scalable applications with React and Next.js, design and maintain robust APIs with Node.js and Python, and architect solutions deployed on AWS or GCP.
London AI Start-up - Up to £120,000 + Shares + Private Healthcare + Pension - Were working with a well-funded AI start-up in London thats gearing up for huge growth. Theyre expecting to scale 10x over the next 18 months. Theyre now looking for a Senior Full-Stack Engineer to help design and build the next generation of their AI-driven platform. Reporting directly into the CTO and collaborating closely with product and research teams, this is a unique chance to take ownership across the stack and make a lasting impact in a company at the forefront of applied AI. The role - This isnt your standard engineering role youll be working end-to-end across frontend, backend, and cloud infrastructure. Youll build sleek, scalable applications with React and Next.js, design and maintain robust APIs with Node.js and Python, and architect solutions deployed on AWS or GCP.
Deep expertise in SAP Integration Suite, including Cloud Integration and API Management.
Deep expertise in SAP Integration Suite, including Cloud Integration and API Management.
FEATURED
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Java Tech Lead Role (2+ years exp in Tech Lead Role) -Java 8+, Spring MVC, SpringBoot, REST API, AWS -Award-Winning UK based FinTech Company -Surrey- Hybrid - 4 days onsite / 1 day WFH -£80,000 - £90,000 (Depending on Experience) I am looking for an Experienced Java Tech Lead who has been leading successful Java teams and is looking for a new challenge - the core tech stack is: Java 8+, Spring MVC, SpringBoot, REST API's and using build tools such as Maven/Gradle.
Java Tech Lead Role (2+ years exp in Tech Lead Role) -Java 8+, Spring MVC, SpringBoot, REST API, AWS -Award-Winning UK based FinTech Company -Surrey- Hybrid - 4 days onsite / 1 day WFH -£80,000 - £90,000 (Depending on Experience) I am looking for an Experienced Java Tech Lead who has been leading successful Java teams and is looking for a new challenge - the core tech stack is: Java 8+, Spring MVC, SpringBoot, REST API's and using build tools such as Maven/Gradle.
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Manual Security Tester - SC Cleared - Remote - Inside IR35
Manual Security Tester - SC Cleared - Remote - Inside IR35
The Bridge (IT Recruitment) Limited
SE1, South East London, SE1 0AA
£400 - 425 per day
Manual API testing
Manual API testing
AWS DevOps Engineer, contract, remote (outside IR35)
AWS DevOps Engineer, contract, remote (outside IR35)
Staffworx Limited
EC1A, City of London
market rates, outside IR35, initial, likely long term extensions
AWS DevOps specialism (Lambda, API Gateway, Route 53, WAF, Shield, IAM, Cognito) * AWS API Gateway
AWS DevOps specialism (Lambda, API Gateway, Route 53, WAF, Shield, IAM, Cognito) * AWS API Gateway
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Experience with Java and API testing using Postman.
Experience with Java and API testing using Postman.
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Experience in developing and deploying Cloud Native Applications using Azure PaaS Capabilities (App Services Plans, Key Vault, SQL Azure DB, AzureFunctions, Containers, AKS, Logic Apps, Service Bus, Event Grid, API Management) * Enterprise Integration Technologies such as Azure API Management, Logic Apps, Service Bus.
Experience in developing and deploying Cloud Native Applications using Azure PaaS Capabilities (App Services Plans, Key Vault, SQL Azure DB, AzureFunctions, Containers, AKS, Logic Apps, Service Bus, Event Grid, API Management) * Enterprise Integration Technologies such as Azure API Management, Logic Apps, Service Bus.
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Configure and support Axway solutions, including API management and B2B gateway. * Working knowledge of Axway technologies, particularly API management and B2B gateway.
Configure and support Axway solutions, including API management and B2B gateway. * Working knowledge of Axway technologies, particularly API management and B2B gateway.
FEATURED
Senior Security Engineer Defender PurView Sentinel
Senior Security Engineer Defender PurView Sentinel
Invitise Ltd
EC1A, City of London
Up to £500 per day Outside IR35
PowerShell scripting and use of Microsoft Graph API
PowerShell scripting and use of Microsoft Graph API
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Junior Test Automation Engineer
Junior Test Automation Engineer
Lynx Recruitment Limited
SW1W, South West London
From £35,000 to £50,000 per annum
Hands-on experience with API testing tools such as RestAssured or SoapUI
Hands-on experience with API testing tools such as RestAssured or SoapUI
Test Automation Engineer
Test Automation Engineer
Lynx Recruitment Limited
SW1W, South West London
From £50,000 to £65,000 per annum
Hands-on experience with API testing tools such as RestAssured or SoapUI
Hands-on experience with API testing tools such as RestAssured or SoapUI
SharePoint REST API: Integration with SharePoint lists and libraries
SharePoint REST API: Integration with SharePoint lists and libraries
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Strong knowledge of Django (or similar) and API design
Strong knowledge of Django (or similar) and API design
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AI Technical Consultant
AI Technical Consultant
Polar Recruitment Services Ltd
KT13, Weybridge
From £60,000 to £70,000 per annum
Strong proficiency in Python, Java, and SQL/NoSQL databases, along with API development and data integration techniques.
Strong proficiency in Python, Java, and SQL/NoSQL databases, along with API development and data integration techniques.
Related Jobs
Locations
- Southwark
- The City, City (EC3)
- The City, City (EC4)
- Felbridge
- Holborn
- Burton End
- Canary Wharf
- Chiswick
- Datchet Common
- Euston
- City of London
- Reading
- South West London
- South East London
- Central London
- West End
- East London
- Maidenhead
- Oxford
- Milton Keynes
- London
- Berkshire
- Surrey
- Hampshire
- Oxfordshire
- Hertfordshire
- Buckinghamshire
- West Sussex
- Bedfordshire
- Northamptonshire
- South East
- East Midlands
- Midlands