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17 Contract API jobs in Buckinghamshire + 20 miles
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Solid background in Apex, LWC, SOQL, and REST/SOAP API integration.
Solid background in Apex, LWC, SOQL, and REST/SOAP API integration.
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Automation Tester - .Net - Specflow - Remote - Inside IR35
Automation Tester - .Net - Specflow - Remote - Inside IR35
The Bridge Ltd
NN4, Northampton, NN4 0AB
£475 - 525 per day
API
API
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Automation Tester - .Net - Specflow - Remote - Inside IR35
Automation Tester - .Net - Specflow - Remote - Inside IR35
The Bridge (IT Recruitment) Limited
NN4, Northampton, NN4 0AB
£475 - 525 per day
API
API
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Strong knowledge of the API/integration lifecycle, including design, deployment, and enhancement. * Expertise in RESTful & SOAP API design, APIM policy, and transformations. * Skilled in API/Integration security protocols & best practices. * Practical experience with Postman, API monitoring, and documentation tools. * Knowledge of Open API Specification, WSDL, SOAP, XSLT. * Application Insight proficiency in .NET and .NET Core (Web, API) and working knowledge of VS Code with Azure.
Strong knowledge of the API/integration lifecycle, including design, deployment, and enhancement. * Expertise in RESTful & SOAP API design, APIM policy, and transformations. * Skilled in API/Integration security protocols & best practices. * Practical experience with Postman, API monitoring, and documentation tools. * Knowledge of Open API Specification, WSDL, SOAP, XSLT. * Application Insight proficiency in .NET and .NET Core (Web, API) and working knowledge of VS Code with Azure.
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Security awareness (especially around data flows and API access) RESTful API design and integration API authentication methods
Security awareness (especially around data flows and API access) RESTful API design and integration API authentication methods
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Integration Engineer Contact (Outside IR35) - Oxfordshire
Integration Engineer Contact (Outside IR35) - Oxfordshire
Halian Technology Limited
OX1, Oxford
From £400 to £550 per day
Security awareness (especially around data flows and API access) RESTful API design and integration API authentication methods
Security awareness (especially around data flows and API access) RESTful API design and integration API authentication methods
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Strong knowledge of GraphQL (API design, schema evolution, integration).
Strong knowledge of GraphQL (API design, schema evolution, integration).
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Developer - Remote - FTC
Developer - Remote - FTC
Data Careers
OX5, Kidlington, OX5 1RA
Up to £40000 per annum + excellent pension and other Emp. Bens.
XSLT, API's. It's a fascinating role developing and enhancing a Police Forces Applications, (as well as the API's so that they integrate with other the Police Force applications), that deliver critical services to the wider community. * Good API / writing API Integrations, (XSLT, XML etc.)
XSLT, API's. It's a fascinating role developing and enhancing a Police Forces Applications, (as well as the API's so that they integrate with other the Police Force applications), that deliver critical services to the wider community. * Good API / writing API Integrations, (XSLT, XML etc.)
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Job Title: Salesforce Architect - Location: Northampton (Hybrid - 2-3 days on-site per week) Contract Duration: Until 31st December 2026 - Day Rate: £382.50 (Inside IR35) About the Role - We are looking for an experienced Salesforce Architect to lead the design and delivery of complex Salesforce solutions. In this pivotal role, you will shape the organisation's Salesforce platform strategy, ensuring alignment with business objectives while driving innovation and scalability. You will be responsible for creating robust, secure, and future-proof solutions across multiple Salesforce clouds, collaborating with business and technical teams, and providing leadership in governance, integration, and architectural best practices. Key Responsibilities - Solution Architecture & Design - Develop and maintain a Salesforce architecture roadmap, covering data models, integrations, a
Job Title: Salesforce Architect - Location: Northampton (Hybrid - 2-3 days on-site per week) Contract Duration: Until 31st December 2026 - Day Rate: £382.50 (Inside IR35) About the Role - We are looking for an experienced Salesforce Architect to lead the design and delivery of complex Salesforce solutions. In this pivotal role, you will shape the organisation's Salesforce platform strategy, ensuring alignment with business objectives while driving innovation and scalability. You will be responsible for creating robust, secure, and future-proof solutions across multiple Salesforce clouds, collaborating with business and technical teams, and providing leadership in governance, integration, and architectural best practices. Key Responsibilities - Solution Architecture & Design - Develop and maintain a Salesforce architecture roadmap, covering data models, integrations, a
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Job Title: Salesforce Vlocity Developer - Location: Windsor, UK (Hybrid 1 day per week onsite) Contract Duration: 6 Months - Day Rate: £500 Inside IR35 - About the Role - We are looking for an experienced Salesforce Vlocity Developer to join a major business unit on a 6-month contract. This is a hybrid role requiring weekly onsite presence in Windsor, offering an exciting opportunity to work on cutting-edge Salesforce solutions within a collaborative team environment. Key Responsibilities * Design and develop custom Vlocity solutions on the Salesforce platform, including CPQ, CLM, and OmniStudio. * Translate business and product requirements into technical specifications. * Build and maintain Vlocity data models, including objects, fields, and relationships. * Develop custom Apex classes, triggers, and Lightning Web Components.
Job Title: Salesforce Vlocity Developer - Location: Windsor, UK (Hybrid 1 day per week onsite) Contract Duration: 6 Months - Day Rate: £500 Inside IR35 - About the Role - We are looking for an experienced Salesforce Vlocity Developer to join a major business unit on a 6-month contract. This is a hybrid role requiring weekly onsite presence in Windsor, offering an exciting opportunity to work on cutting-edge Salesforce solutions within a collaborative team environment. Key Responsibilities * Design and develop custom Vlocity solutions on the Salesforce platform, including CPQ, CLM, and OmniStudio. * Translate business and product requirements into technical specifications. * Build and maintain Vlocity data models, including objects, fields, and relationships. * Develop custom Apex classes, triggers, and Lightning Web Components.
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Job Title: Salesforce Architect - Location: Northampton (Hybrid - 2-3 days on-site per week) Contract Duration: Until 31st December 2026 - Day Rate: £382.50 (Inside IR35) About the Role - We are looking for an experienced Salesforce Architect to lead the design and delivery of complex Salesforce solutions. In this pivotal role, you will shape the organisation's Salesforce platform strategy, ensuring alignment with business objectives while driving innovation and scalability. You will be responsible for creating robust, secure, and future-proof solutions across multiple Salesforce clouds, collaborating with business and technical teams, and providing leadership in governance, integration, and architectural best practices. Key Responsibilities - Solution Architecture & Design - Develop and maintain a Salesforce architecture roadmap, covering data models, integrations, a
Job Title: Salesforce Architect - Location: Northampton (Hybrid - 2-3 days on-site per week) Contract Duration: Until 31st December 2026 - Day Rate: £382.50 (Inside IR35) About the Role - We are looking for an experienced Salesforce Architect to lead the design and delivery of complex Salesforce solutions. In this pivotal role, you will shape the organisation's Salesforce platform strategy, ensuring alignment with business objectives while driving innovation and scalability. You will be responsible for creating robust, secure, and future-proof solutions across multiple Salesforce clouds, collaborating with business and technical teams, and providing leadership in governance, integration, and architectural best practices. Key Responsibilities - Solution Architecture & Design - Develop and maintain a Salesforce architecture roadmap, covering data models, integrations, a
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Mid-Level C++ Developer (5+ years of experience) Location:Hybrid - 2-3 days onsite in Hounslow - Rate:£430 per day (Inside IR35) Duration:12 months (Extension highly likely) Are you an experienced C++ Developer looking for your next long-term contract? We are seeking a technically strong and versatileMid-Level C++ Developerto join our client's high-performing team on a travel technology project. Key Responsibilities * Develop and maintain high-performance Back End components using C++11 or newer. * Design dynamic, responsive Front End interfaces with AngularJS/Angular 2+. * Support and enhance existing systems with a focus on performance, stability, and maintainability. * Collaborate with cross-functional teams (Product Owners, QA, DevOps, etc.) to deliver new features. * Refactor Legacy code and actively contribute to reducing technical debt.
Mid-Level C++ Developer (5+ years of experience) Location:Hybrid - 2-3 days onsite in Hounslow - Rate:£430 per day (Inside IR35) Duration:12 months (Extension highly likely) Are you an experienced C++ Developer looking for your next long-term contract? We are seeking a technically strong and versatileMid-Level C++ Developerto join our client's high-performing team on a travel technology project. Key Responsibilities * Develop and maintain high-performance Back End components using C++11 or newer. * Design dynamic, responsive Front End interfaces with AngularJS/Angular 2+. * Support and enhance existing systems with a focus on performance, stability, and maintainability. * Collaborate with cross-functional teams (Product Owners, QA, DevOps, etc.) to deliver new features. * Refactor Legacy code and actively contribute to reducing technical debt.
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Job Description Workday Integration Consultant - Key Responsibilities - Design, develop, and maintain Workday integrations including Core Connectors, EIBs, Studio, and custom solutions. Leverage Workday HCM core knowledge to deliver effective integration solutions. Perform XML/XSLT transformations and handle various file formats (CSV, XML, JSON, etc.). Work with APIs, Web Services (SOAP/REST), and file transfer protocols (SFTP/FTP). Ensure accuracy, compliance, and performance of integrations across HR, Payroll, Benefits, and Finance systems. Collaborate with business stakeholders to translate requirements and process logic into actionable code and functional solutions. Troubleshoot, optimize, and support integrations in production environments. Plan, prioritize, and deliver assigned work within agreed timelines. Required Skills & Qualifications
Job Description Workday Integration Consultant - Key Responsibilities - Design, develop, and maintain Workday integrations including Core Connectors, EIBs, Studio, and custom solutions. Leverage Workday HCM core knowledge to deliver effective integration solutions. Perform XML/XSLT transformations and handle various file formats (CSV, XML, JSON, etc.). Work with APIs, Web Services (SOAP/REST), and file transfer protocols (SFTP/FTP). Ensure accuracy, compliance, and performance of integrations across HR, Payroll, Benefits, and Finance systems. Collaborate with business stakeholders to translate requirements and process logic into actionable code and functional solutions. Troubleshoot, optimize, and support integrations in production environments. Plan, prioritize, and deliver assigned work within agreed timelines. Required Skills & Qualifications
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Implement schema registries, data contracts, and API-first data governance.
Implement schema registries, data contracts, and API-first data governance.
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Lead the design and development of automated UI and API testing solutions using SpecFlow and Playwright, written in C# .NET.
Lead the design and development of automated UI and API testing solutions using SpecFlow and Playwright, written in C# .NET.
NEWFEATURED
A Full Stack Software Engineering role. A role that will build your technical capabilities, providing a foundation for growth into more senior technical leadership roles. The Software Engineer is a hands-on contributor responsible for delivering secure, maintainable, and performant software as part of a cross-functional Agile team. Working closely with Product, QA, DevOps, and fellow engineers, this role helps shape technical solutions and contributes to quality practices. Essential Skills & Experience * Strong Python Development Capability 3 years+ * Experienced with front-end frameworks (React.js and Next.js) * Experience with TypeScript * Experience implementing and integrating with REST APIs * SQL experience (preferably PostgreSQL and/or MySQL) * Experience with responsive web design * Understanding of SEO strategies and security standards
A Full Stack Software Engineering role. A role that will build your technical capabilities, providing a foundation for growth into more senior technical leadership roles. The Software Engineer is a hands-on contributor responsible for delivering secure, maintainable, and performant software as part of a cross-functional Agile team. Working closely with Product, QA, DevOps, and fellow engineers, this role helps shape technical solutions and contributes to quality practices. Essential Skills & Experience * Strong Python Development Capability 3 years+ * Experienced with front-end frameworks (React.js and Next.js) * Experience with TypeScript * Experience implementing and integrating with REST APIs * SQL experience (preferably PostgreSQL and/or MySQL) * Experience with responsive web design * Understanding of SEO strategies and security standards
A role to put your Software Engineering problem solving skills to the test, translating complex technical concepts to cross-functional audiences. You will play a key role in delivering robust, secure, and scalable software systems. Working closely with Product, QA, and DevOps, you will balance hands-on development with architectural contribution, promote Agile best practices, and help raise the engineering bar through coaching, code quality, and continuous improvement initiatives. You will support the teams technical evolution while ensuring reliable product delivery aligned to business needs. * Strong Python Development Capability 5 years+ * Experience implementing and integrating with REST APIs * SQL experience (preferably PostgreSQL and/or MySQL) * Passionate about building quality software * Experience of developing in Rust.
A role to put your Software Engineering problem solving skills to the test, translating complex technical concepts to cross-functional audiences. You will play a key role in delivering robust, secure, and scalable software systems. Working closely with Product, QA, and DevOps, you will balance hands-on development with architectural contribution, promote Agile best practices, and help raise the engineering bar through coaching, code quality, and continuous improvement initiatives. You will support the teams technical evolution while ensuring reliable product delivery aligned to business needs. * Strong Python Development Capability 5 years+ * Experience implementing and integrating with REST APIs * SQL experience (preferably PostgreSQL and/or MySQL) * Passionate about building quality software * Experience of developing in Rust.
130 exact matches jobs are outside your preferred location
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Senior API Technical Consultant (GraphQL Specialist)
Senior API Technical Consultant (GraphQL Specialist)
Staffworx Limited
London
market rates, outside IR35, 2 days on site
Lead the designand evolution of our API schemas, ensuring they meet the complex demands of a rapidly growing platform. * Expert levelGraphQL, including advanced API design, schema evolution, performance optimisation.
Lead the designand evolution of our API schemas, ensuring they meet the complex demands of a rapidly growing platform. * Expert levelGraphQL, including advanced API design, schema evolution, performance optimisation.
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We are AMS. We are a global total workforce solutions firm; we enable organisations to thrive in an age of constant change by building, re-shaping, and optimising workforces. Our Contingent Workforce Solutions (CWS) is one of our service offerings; we act as an extension of our clients' recruitment team and provide professional interim and temporary resources. Our client, a major UK retail bank, provides every day banking services to over 17 million retail customers. The banks expertise and services span across Business Services, Corporate banking, Wealth Management, Group Functions, Retail and Investment Banking. On behalf of this organisation, AMS are looking for a Software Engineer (AI Prompts) for a 6 month contract based in either the bank's London or Edinburgh office on a remote first working model.
We are AMS. We are a global total workforce solutions firm; we enable organisations to thrive in an age of constant change by building, re-shaping, and optimising workforces. Our Contingent Workforce Solutions (CWS) is one of our service offerings; we act as an extension of our clients' recruitment team and provide professional interim and temporary resources. Our client, a major UK retail bank, provides every day banking services to over 17 million retail customers. The banks expertise and services span across Business Services, Corporate banking, Wealth Management, Group Functions, Retail and Investment Banking. On behalf of this organisation, AMS are looking for a Software Engineer (AI Prompts) for a 6 month contract based in either the bank's London or Edinburgh office on a remote first working model.
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D365 Senior Developer - D365 Finance, APIS, Azure
D365 Senior Developer - D365 Finance, APIS, Azure
Hays
London
£500.0 - £515.0 per day + up to £515 pd (InsideIR35)
Up to £515 per day (Inside IR35) Remote / must be UK based - 12 months - We're looking for an experienced D365 Finance & Operations Developer to lead the development of custom journal processing extensions. This role suits someone with strong X++ skills and a deep understanding of D365 Finance, especially in high-volume, cross-functional environments. * Experience in D365 F&O development (X++, data entities, extensions). * Experience with general ledger, journals, financial dimensions, and intercompany transactions. * Strong knowledge of Visual Studio, LCS, Azure DevOps, and CI/CD pipelines. * Proficient in Power BI: report creation, configuration, and export. * Skilled in workflows, security roles, SSRS, and unit testing (SysTest). * Familiar with DMF, OData, batch processing, and error handling. * Ability to optimize performance for high-volume transactions.
Up to £515 per day (Inside IR35) Remote / must be UK based - 12 months - We're looking for an experienced D365 Finance & Operations Developer to lead the development of custom journal processing extensions. This role suits someone with strong X++ skills and a deep understanding of D365 Finance, especially in high-volume, cross-functional environments. * Experience in D365 F&O development (X++, data entities, extensions). * Experience with general ledger, journals, financial dimensions, and intercompany transactions. * Strong knowledge of Visual Studio, LCS, Azure DevOps, and CI/CD pipelines. * Proficient in Power BI: report creation, configuration, and export. * Skilled in workflows, security roles, SSRS, and unit testing (SysTest). * Familiar with DMF, OData, batch processing, and error handling. * Ability to optimize performance for high-volume transactions.
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D365 Senior Developer - D365 Finance, APIS, Azure
D365 Senior Developer - D365 Finance, APIS, Azure
Hays
London
£500.0 - £515.0 per day + up to £515 pd (InsideIR35)
Up to £515 per day (Inside IR35) Remote / must be UK based - 12 months - We're looking for an experienced D365 Finance & Operations Developer to lead the development of custom journal processing extensions. This role suits someone with strong X++ skills and a deep understanding of D365 Finance, especially in high-volume, cross-functional environments. * 5+ years in D365 F&O development (X++, data entities, extensions). * Experience with general ledger, journals, financial dimensions, and intercompany transactions. * Strong knowledge of Visual Studio, LCS, Azure DevOps, and CI/CD pipelines. * Proficient in Power BI: report creation, configuration, and export. * Skilled in workflows, security roles, SSRS, and unit testing (SysTest). * Familiar with DMF, OData, batch processing, and error handling. * Ability to optimize performance for high-volume transactions.
Up to £515 per day (Inside IR35) Remote / must be UK based - 12 months - We're looking for an experienced D365 Finance & Operations Developer to lead the development of custom journal processing extensions. This role suits someone with strong X++ skills and a deep understanding of D365 Finance, especially in high-volume, cross-functional environments. * 5+ years in D365 F&O development (X++, data entities, extensions). * Experience with general ledger, journals, financial dimensions, and intercompany transactions. * Strong knowledge of Visual Studio, LCS, Azure DevOps, and CI/CD pipelines. * Proficient in Power BI: report creation, configuration, and export. * Skilled in workflows, security roles, SSRS, and unit testing (SysTest). * Familiar with DMF, OData, batch processing, and error handling. * Ability to optimize performance for high-volume transactions.
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AMS is a global workforce solutions partner committed to creating inclusive, dynamic, and future-ready workplaces. We help organisations adapt, grow, and thrive in an ever-evolving world by building, shaping, and optimising diverse talent strategies. Our Contingent Workforce Solutions (CWS) is one of our service offerings. Acting as an extension of their recruitment teams, we connect them with skilled interim and temporary professionals, fostering workplaces where everyone can contribute and succeed. Our client, a major UK retail bank, provides every day banking services to over 17 million retail customers. The banks expertise and services span across Business Services, Corporate banking, Wealth Management, Group Functions, Retail and Investment Banking. On behalf of this organisation, AMS are looking for 3 - Full Stack Developers for acontract until end of 2025 based
AMS is a global workforce solutions partner committed to creating inclusive, dynamic, and future-ready workplaces. We help organisations adapt, grow, and thrive in an ever-evolving world by building, shaping, and optimising diverse talent strategies. Our Contingent Workforce Solutions (CWS) is one of our service offerings. Acting as an extension of their recruitment teams, we connect them with skilled interim and temporary professionals, fostering workplaces where everyone can contribute and succeed. Our client, a major UK retail bank, provides every day banking services to over 17 million retail customers. The banks expertise and services span across Business Services, Corporate banking, Wealth Management, Group Functions, Retail and Investment Banking. On behalf of this organisation, AMS are looking for 3 - Full Stack Developers for acontract until end of 2025 based
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Integrate and manage APIs through Apigee API Management. * Familiarity with Apigee and API gateway configuration.
Integrate and manage APIs through Apigee API Management. * Familiarity with Apigee and API gateway configuration.
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Azure Analytics & Integration stack (e.g., Databricks, Synapse, Logic Apps, API Management) o API frameworks (SOAP, REST, WebSocket)
Azure Analytics & Integration stack (e.g., Databricks, Synapse, Logic Apps, API Management) o API frameworks (SOAP, REST, WebSocket)
AI Solution Architect (AI Agents, Retail / eCommerce)
AI Solution Architect (AI Agents, Retail / eCommerce)
Staffworx Limited
WC1A, Central London
market rates, outside IR35 or permanent
Utilize AWS services (Lambda, S3, API Gateway, SageMaker, DynamoDB, ECS, etc.) to deploy scalable AI solutions. * Experience with AI/ML frameworks such as TensorFlow, PyTorch, OpenAI API, or LangChain. * Strong understanding of API design, including REST, GraphQL, and WebSockets.
Utilize AWS services (Lambda, S3, API Gateway, SageMaker, DynamoDB, ECS, etc.) to deploy scalable AI solutions. * Experience with AI/ML frameworks such as TensorFlow, PyTorch, OpenAI API, or LangChain. * Strong understanding of API design, including REST, GraphQL, and WebSockets.