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14 Contract API jobs in Kingston Upon Thames + 10 miles
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Experience implementing REST APIs (knowledge in API security would be a plus), unit tests and using a test-driven development approach and associated testing tools
Experience implementing REST APIs (knowledge in API security would be a plus), unit tests and using a test-driven development approach and associated testing tools
FEATUREDNEW
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It will be nice if you have experience working with Python, React, Lambda, DynamoDB, S3, AppSync/GraphQL, API Gateway, Step Functions etc
It will be nice if you have experience working with Python, React, Lambda, DynamoDB, S3, AppSync/GraphQL, API Gateway, Step Functions etc
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Up to £600 per day Outside IR35 - London (Hybrid) The Role - As a Product Owner with a specialist focus on data mapping, you’ll be at the heart of enabling robust, scalable, and intelligent data flows across our internal systems. You'll define and deliver product capabilities that ensure seamless data flow between systems, APIs, and third-party platforms, driving clarity, consistency, and business value across our data landscape. * Own the data mapping product area from vision to execution. * Translate business needs into detailed data mapping requirements and user stories. * Collaborate with engineering, data, and compliance teams to implement mappings across internal systems. * Ensure data accuracy, consistency, and traceability across the platform. * Maintain documentation and support agile delivery practices.
Up to £600 per day Outside IR35 - London (Hybrid) The Role - As a Product Owner with a specialist focus on data mapping, you’ll be at the heart of enabling robust, scalable, and intelligent data flows across our internal systems. You'll define and deliver product capabilities that ensure seamless data flow between systems, APIs, and third-party platforms, driving clarity, consistency, and business value across our data landscape. * Own the data mapping product area from vision to execution. * Translate business needs into detailed data mapping requirements and user stories. * Collaborate with engineering, data, and compliance teams to implement mappings across internal systems. * Ensure data accuracy, consistency, and traceability across the platform. * Maintain documentation and support agile delivery practices.
FEATUREDNEW
We are looking for a candidate that is used to working in a lean team and able to manage the API integration workstream.
We are looking for a candidate that is used to working in a lean team and able to manage the API integration workstream.
FEATUREDNEW
Are you passionate about building world-class API platforms that enable innovation at scale? A fast-growing FinTech is seeking a Platform Product Owner to shape the future of their API services – supporting both internal engineering teams and external partners. * Proven experience managing credit platforms/API product from a FinTech or financial sercvices business
Are you passionate about building world-class API platforms that enable innovation at scale? A fast-growing FinTech is seeking a Platform Product Owner to shape the future of their API services – supporting both internal engineering teams and external partners. * Proven experience managing credit platforms/API product from a FinTech or financial sercvices business
FEATUREDNEW
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IT Application Owner – Salesforce Cloud, MuleSoft & Shield
IT Application Owner – Salesforce Cloud, MuleSoft & Shield
7P UK Ltd
W2, West London
From £500 to £550 per day
Define and maintainrobust API contractsto guarantee seamless, consistent, and stable integrations with other systems.
Define and maintainrobust API contractsto guarantee seamless, consistent, and stable integrations with other systems.
FEATURED
IT Application Owner - Enterprise Application & Integration
IT Application Owner - Enterprise Application & Integration
7P UK Ltd
W2, West London
From £500 to £550 per day
Ensure robust API contracts that enable consistent and stable integrations with surrounding systems.
Ensure robust API contracts that enable consistent and stable integrations with surrounding systems.
FEATURED
IT Application Owner – Salesforce Comms Cloud / CPQ
IT Application Owner – Salesforce Comms Cloud / CPQ
7P UK Ltd
W2, West London
From £500 to £550 per day
Define and maintain API contracts, ensuring stable and scalable integrations with adjacent systems.
Define and maintain API contracts, ensuring stable and scalable integrations with adjacent systems.
FEATURED
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Angular Frontend Developer (SC Cleared)
Angular Frontend Developer (SC Cleared)
JLA Resourcing Ltd
TW12, Hampton
up to £550 per day Inside IR35
Role: Angular Frontend Developer (SC Cleared) Location: Hybrid - One day a week onsite in West London - Contract: Initial 3 months - Rate: Up to £550 per day - Start: ASAP - IR35 Status: Inside IR35 - This role has been deemed Inside IR35 and will require you to work through an umbrella company. The Opportunity - We are looking an SC Cleared Frontend Developer to lead the design, development, and implementation of a complex front-end development project. You will play a key role in delivering innovative UI solutions that align with project objectives and business goals. This is a hybrid role, requiring one day a week onsite in West Sussex, paying a daily rate of up to £550 per day, with an initial 3-month contract. There is a high probability that the contract will extend past this initial period. Given the sensitive nature of our work, the candidate will need to hold
Role: Angular Frontend Developer (SC Cleared) Location: Hybrid - One day a week onsite in West London - Contract: Initial 3 months - Rate: Up to £550 per day - Start: ASAP - IR35 Status: Inside IR35 - This role has been deemed Inside IR35 and will require you to work through an umbrella company. The Opportunity - We are looking an SC Cleared Frontend Developer to lead the design, development, and implementation of a complex front-end development project. You will play a key role in delivering innovative UI solutions that align with project objectives and business goals. This is a hybrid role, requiring one day a week onsite in West Sussex, paying a daily rate of up to £550 per day, with an initial 3-month contract. There is a high probability that the contract will extend past this initial period. Given the sensitive nature of our work, the candidate will need to hold
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Java / Spring Microservices on AWS Kubernetes building REST API's * AWS API Gateway
Java / Spring Microservices on AWS Kubernetes building REST API's * AWS API Gateway
PREMIUM
Hybrid wiorking - 2 days a week in London - We are seeking an experienced D365 CRM Developer to join our team on a 6-month contract basis to support the upgrade of our CRM system from Dynamics 2011 to D365 CE (Customer Engagement) Online. * Upgrade Support: Assist in the migration of CRM data, customizations, and configurations from Dynamics 2011 to D365 CE Online. * Customisation & Development: Develop custom plugins, workflows, and integrations within Dynamics 365 CRM using C#, JavaScript, and Power Platform tools (Power Automate, PowerApps, etc.). * Troubleshooting & Issue Resolution: Provide technical support during the migration and resolve any issues related to the upgrade process. * System Configuration & Customization: Configure and customize D365 CRM modules, including Sales, Customer Service, and Marketing, to meet business requirements.
Hybrid wiorking - 2 days a week in London - We are seeking an experienced D365 CRM Developer to join our team on a 6-month contract basis to support the upgrade of our CRM system from Dynamics 2011 to D365 CE (Customer Engagement) Online. * Upgrade Support: Assist in the migration of CRM data, customizations, and configurations from Dynamics 2011 to D365 CE Online. * Customisation & Development: Develop custom plugins, workflows, and integrations within Dynamics 365 CRM using C#, JavaScript, and Power Platform tools (Power Automate, PowerApps, etc.). * Troubleshooting & Issue Resolution: Provide technical support during the migration and resolve any issues related to the upgrade process. * System Configuration & Customization: Configure and customize D365 CRM modules, including Sales, Customer Service, and Marketing, to meet business requirements.
FEATUREDNEW
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We are seeking a highly skilled and experienced Back-End Developer with advanced expertise in Go (Golang), data analytics, and cloud-based backend services. This individual will play a key role in building scalable APIs, processing data pipelines, and supporting front-end web applications with real-time analytics and insights * Design and implement RESTful APIs and GraphQL endpoints to support front-end applications. * Process and optimize large-scale data pipelines for real-time analytics and reporting. * Write clean, maintainable, and efficient code that adheres to best practices and coding standards. * Utilize AWS cloud services for scalable and secure backend application deployment. * Ensure robust data storage and management using PostgreSQL and other database solutions. * Implement authentication, authorization, and security best practices in backend services.
We are seeking a highly skilled and experienced Back-End Developer with advanced expertise in Go (Golang), data analytics, and cloud-based backend services. This individual will play a key role in building scalable APIs, processing data pipelines, and supporting front-end web applications with real-time analytics and insights * Design and implement RESTful APIs and GraphQL endpoints to support front-end applications. * Process and optimize large-scale data pipelines for real-time analytics and reporting. * Write clean, maintainable, and efficient code that adheres to best practices and coding standards. * Utilize AWS cloud services for scalable and secure backend application deployment. * Ensure robust data storage and management using PostgreSQL and other database solutions. * Implement authentication, authorization, and security best practices in backend services.
It will be nice if you have experience working with Python, React, Lambda, DynamoDB, S3, AppSync/GraphQL, API Gateway, Step Functions etc
It will be nice if you have experience working with Python, React, Lambda, DynamoDB, S3, AppSync/GraphQL, API Gateway, Step Functions etc
Perform axial and lateral pile capacity calculations (API, DNV, ISO methods).
Perform axial and lateral pile capacity calculations (API, DNV, ISO methods).
176 exact matches jobs are outside your preferred location
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Job Title: Android Developer API & Parser Integration (Contract) However, they're now embarking on an ambitious new journey: decoupling the front-end and establishing an API-first ecosystem. Youll take an existing Android app and re-engineer it to expose its functionality via a clean, robust API. To allow external clients to build their own front ends using the data, while ensuring the app can also consume the same API internally. * Re-architect an existing Android application to expose its functionality via a standalone API. * Modify the current Android application to consume data from the newly created API. * Solid experience in API design and development, ideally for mobile-to-device communication. * Familiarity with security best practices in
Job Title: Android Developer API & Parser Integration (Contract) However, they're now embarking on an ambitious new journey: decoupling the front-end and establishing an API-first ecosystem. Youll take an existing Android app and re-engineer it to expose its functionality via a clean, robust API. To allow external clients to build their own front ends using the data, while ensuring the app can also consume the same API internally. * Re-architect an existing Android application to expose its functionality via a standalone API. * Modify the current Android application to consume data from the newly created API. * Solid experience in API design and development, ideally for mobile-to-device communication. * Familiarity with security best practices in
Hands-on experience with Lambda, DynamoDB, S3, API Gateway, CloudWatch
Hands-on experience with Lambda, DynamoDB, S3, API Gateway, CloudWatch
NEW
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Senior Test Engineer – AWS Node Testing – Accounts
Senior Test Engineer – AWS Node Testing – Accounts
Spyrosoft Ltd
London
FTC (full-time) + benefits + pension
API testing (RestAssured or similar) The successful applicant will have strong Playwright/JavaScript knowledge, strong experience of API testing, have written automated performance tests, be comfortable working with AWS services and experience using monitoring tools * be experienced with API testing (RestAssured and Java knowledge would be beneficial)
API testing (RestAssured or similar) The successful applicant will have strong Playwright/JavaScript knowledge, strong experience of API testing, have written automated performance tests, be comfortable working with AWS services and experience using monitoring tools * be experienced with API testing (RestAssured and Java knowledge would be beneficial)
NEW
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Perform gap analyses of applicable design and fabrication codes (ASME, EN/ISO, DNV, API, AWS, ASTM). * Strong knowledge of international standards (ASME, EN/ISO, DNV, API, AWS, ASTM).
Perform gap analyses of applicable design and fabrication codes (ASME, EN/ISO, DNV, API, AWS, ASTM). * Strong knowledge of international standards (ASME, EN/ISO, DNV, API, AWS, ASTM).
NEW
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Experience with REST and SOAP API integrations
Experience with REST and SOAP API integrations
NEW
You will be working on a standard API layer wrapping 3rd party services (i.e Intercom and Gong) specifically to standardise the interface for cadencing/marketing/enrolment/email sequencing.
You will be working on a standard API layer wrapping 3rd party services (i.e Intercom and Gong) specifically to standardise the interface for cadencing/marketing/enrolment/email sequencing.
FEATUREDNEW
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Head Of Infrastructure Architecture
Head Of Infrastructure Architecture
Magnus Partners Talent Solutions
London
Competitive day rate (or equivalent)
About the Company - A dynamic London-based fintech startup is revolutionising financial services through cutting-edge technology. Their mission is to deliver secure, scalable, and innovative solutions that empower users in a rapidly evolving digital landscape. Join a forward-thinking team to build a next-generation platform that redefines how financial systems operate, driven by innovation, collaboration, and excellence. Role Overview - As the Technical Lead for Infrastructure & Architecture, youll spearhead the development of a transformative financial platform, reporting directly to the CEO. Leading a compact team of two developers, youll design and deliver a robust, secure architecture that sets new industry standards. This hands-on role demands deep expertise in full-stack development, blockchain technologies, and a relentless drive to innovate.
About the Company - A dynamic London-based fintech startup is revolutionising financial services through cutting-edge technology. Their mission is to deliver secure, scalable, and innovative solutions that empower users in a rapidly evolving digital landscape. Join a forward-thinking team to build a next-generation platform that redefines how financial systems operate, driven by innovation, collaboration, and excellence. Role Overview - As the Technical Lead for Infrastructure & Architecture, youll spearhead the development of a transformative financial platform, reporting directly to the CEO. Leading a compact team of two developers, youll design and deliver a robust, secure architecture that sets new industry standards. This hands-on role demands deep expertise in full-stack development, blockchain technologies, and a relentless drive to innovate.
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Role Title: Appian Developer - Location: London - Duration: 30/11/2025 - Via Umbrella Company - We are seeking a skilled and motivated Appian Developer to join our dynamic team. The ideal candidate will be responsible for designing, developing, and implementing business process management (BPM) solutions using the Appian platform. You will work closely with business analysts, stakeholders, and other developers to deliver scalable and efficient applications that meet business requirements. Design and develop BPM applications using Appian. Collaborate with cross-functional teams to gather and analyse requirements. Build and maintain Appian objects such as records, reports, interfaces, and process models. Integrate Appian applications with external systems using APIs and web services. Participate in code reviews, testing, and deployment activities.
Role Title: Appian Developer - Location: London - Duration: 30/11/2025 - Via Umbrella Company - We are seeking a skilled and motivated Appian Developer to join our dynamic team. The ideal candidate will be responsible for designing, developing, and implementing business process management (BPM) solutions using the Appian platform. You will work closely with business analysts, stakeholders, and other developers to deliver scalable and efficient applications that meet business requirements. Design and develop BPM applications using Appian. Collaborate with cross-functional teams to gather and analyse requirements. Build and maintain Appian objects such as records, reports, interfaces, and process models. Integrate Appian applications with external systems using APIs and web services. Participate in code reviews, testing, and deployment activities.
PREMIUMNEW
Hybrid - 2 Days a Week London We're looking for a Software Engineer with strong skills in Node.js, React, and TypeScript to build scalable web applications. You'll work across the stack, using Docker, Azure Web Apps, and ElasticSearch. Develop full-stack applications with Node.js, React, and TypeScript Build and maintain RESTful APIs and responsive UIs Containerize and deploy apps using Docker and Azure Web Apps Implement and optimize search with ElasticSearch Collaborate with product and DevOps teams Write clean, testable code and participate in code reviews Solid experience with Node.js, React, and TypeScript Familiarity with Docker, Azure Web Apps, and ElasticSearch Good understanding of REST APIs and modern frontend tools Comfortable with Git workflows and agile development Strong communication and problem-solving skills
Hybrid - 2 Days a Week London We're looking for a Software Engineer with strong skills in Node.js, React, and TypeScript to build scalable web applications. You'll work across the stack, using Docker, Azure Web Apps, and ElasticSearch. Develop full-stack applications with Node.js, React, and TypeScript Build and maintain RESTful APIs and responsive UIs Containerize and deploy apps using Docker and Azure Web Apps Implement and optimize search with ElasticSearch Collaborate with product and DevOps teams Write clean, testable code and participate in code reviews Solid experience with Node.js, React, and TypeScript Familiarity with Docker, Azure Web Apps, and ElasticSearch Good understanding of REST APIs and modern frontend tools Comfortable with Git workflows and agile development Strong communication and problem-solving skills
NEW
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Role: Cyber Security Engineer - Salary/Rate: up to £700 per day (inside IR35) Location: Hybrid London - Contract Duration: until October 2025 - We are currently looking for a Cyber Security Engineer for our government client. This Cyber Security Engineer role is hybrid, based between 2-3 days per week on site in central London and the remainder of the week working remotely. The contract for the Cyber Security Engineer position is until October 2025 with potential to extend, operating inside IR35. Security Clearance: Security Check ('SC Clearance') This role is inside IR35 - Due to the service of the role, it will now be based on an Umbrella solution. * Experience penetration testing, ethical hacking, or completing vulnerability assessments. * Security testing tools (e.g., Burp Suite, OWASP ZAP, Nikto, Nmap, Metasploit, etc.).
Role: Cyber Security Engineer - Salary/Rate: up to £700 per day (inside IR35) Location: Hybrid London - Contract Duration: until October 2025 - We are currently looking for a Cyber Security Engineer for our government client. This Cyber Security Engineer role is hybrid, based between 2-3 days per week on site in central London and the remainder of the week working remotely. The contract for the Cyber Security Engineer position is until October 2025 with potential to extend, operating inside IR35. Security Clearance: Security Check ('SC Clearance') This role is inside IR35 - Due to the service of the role, it will now be based on an Umbrella solution. * Experience penetration testing, ethical hacking, or completing vulnerability assessments. * Security testing tools (e.g., Burp Suite, OWASP ZAP, Nikto, Nmap, Metasploit, etc.).
NEW
Job Title: D365 CE Developer (Contract) Location: Central London (Hybrid – 3 days onsite per week) Contract Duration: 3 Months - Outside IR35 - We are seeking an experienced Dynamics 365 Customer Engagement (CE) Developer for a 3-month contract. The ideal candidate will have strong experience in data migration and system integration within the D365 CE environment. This hybrid role requires 3 days per week onsite in Central London. * Develop and customise solutions in Dynamics 365 CE * Lead and support data migration activities * Integrate D365 CE with external systems using APIs and middleware * Collaborate with business and technical teams to ensure seamless delivery * Proven experience as a D365 CE Developer * Strong skills in data migration and integration * Hands-on experience with Power Platform, JavaScript, plug-ins, and workflows
Job Title: D365 CE Developer (Contract) Location: Central London (Hybrid – 3 days onsite per week) Contract Duration: 3 Months - Outside IR35 - We are seeking an experienced Dynamics 365 Customer Engagement (CE) Developer for a 3-month contract. The ideal candidate will have strong experience in data migration and system integration within the D365 CE environment. This hybrid role requires 3 days per week onsite in Central London. * Develop and customise solutions in Dynamics 365 CE * Lead and support data migration activities * Integrate D365 CE with external systems using APIs and middleware * Collaborate with business and technical teams to ensure seamless delivery * Proven experience as a D365 CE Developer * Strong skills in data migration and integration * Hands-on experience with Power Platform, JavaScript, plug-ins, and workflows
FEATUREDNEW
Related Jobs
Locations
- London
- South West London
- Hounslow
- Central London
- West London
- Esher
- Hampton
- Victoria, South West London
- Isleworth
- South Croydon
- Surrey
- City of London
- Manchester
- Guildford
- South East London
- South East
- Bracknell
- Reading
- Staines
- Bromley
- East London
- Dorking
- Birmingham
- Milton Keynes
- Southampton
- Uxbridge
- West Midlands
- Slough
- Windsor