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16 Contract API jobs in Hertfordshire + 20 miles
135 exact matches jobs are outside your preferred location
Strong knowledge of API integration.
Strong knowledge of API integration.
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Troubleshoot and resolve complex technical cases involving Airtable's API, SAML/SSO, SCIM provisioning, advanced automations, scripting, and third-party integrations.
Troubleshoot and resolve complex technical cases involving Airtable's API, SAML/SSO, SCIM provisioning, advanced automations, scripting, and third-party integrations.
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Strong focus on optimizing inference performance and cost (e.g., model compression, quantization, API optimization).
Strong focus on optimizing inference performance and cost (e.g., model compression, quantization, API optimization).
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Job Title:Salesforce Tech Lead - Location:Windsor, UK (1 day a week) Job Purpose and Primary Objectives:Salesforce Tech Lead - Key Responsibilities (Please specify if the position is an individual one or part of a team) * Participate in refining and scoping upcoming sprint work. * Assist solution architects with technical design and breaking down complex tasks. * Accountable for timely delivery of assigned tickets, meeting acceptance criteria. * Conduct spikes/investigations into innovative technologies for future project viability. * Ensure teammates' work meets code quality standards through reviews. * Coordinate with other teams for integrations, ensuring alignment of tasks and APIs. * Work with the QA team to investigate and resolve issues. * Mentor junior team members, providing assistance with tasks and problem-solving.
Job Title:Salesforce Tech Lead - Location:Windsor, UK (1 day a week) Job Purpose and Primary Objectives:Salesforce Tech Lead - Key Responsibilities (Please specify if the position is an individual one or part of a team) * Participate in refining and scoping upcoming sprint work. * Assist solution architects with technical design and breaking down complex tasks. * Accountable for timely delivery of assigned tickets, meeting acceptance criteria. * Conduct spikes/investigations into innovative technologies for future project viability. * Ensure teammates' work meets code quality standards through reviews. * Coordinate with other teams for integrations, ensuring alignment of tasks and APIs. * Work with the QA team to investigate and resolve issues. * Mentor junior team members, providing assistance with tasks and problem-solving.
Position: Backend Engineer - Location: Remote (UK) Work Type: Contract - Join our team to build the backbone of a global music streaming platform! We're looking for a JAVA Backend Engineer who loves coding, solving problems, and delivering features that reach millions of users. * Build scalable Java & SpringBoot microservices. * Develop APIs and backend tools for engineers across the company. * Use TDD, CI/CD, Docker, Kubernetes, Jenkins, and GCP services. * Work with alternate languages like Python, Scala, Golang, or Node.js for backend tasks. * Collaborate in an Agile environment with cross-functional teams. * Strong backend development skills (Java and microservices). * Experience with microservices, TDD, CI/CD, Docker & Kubernetes, and cloud platforms (GCP preferred). * Familiarity with and one of Python, Golang, Scala or Node.js is a plus.
Position: Backend Engineer - Location: Remote (UK) Work Type: Contract - Join our team to build the backbone of a global music streaming platform! We're looking for a JAVA Backend Engineer who loves coding, solving problems, and delivering features that reach millions of users. * Build scalable Java & SpringBoot microservices. * Develop APIs and backend tools for engineers across the company. * Use TDD, CI/CD, Docker, Kubernetes, Jenkins, and GCP services. * Work with alternate languages like Python, Scala, Golang, or Node.js for backend tasks. * Collaborate in an Agile environment with cross-functional teams. * Strong backend development skills (Java and microservices). * Experience with microservices, TDD, CI/CD, Docker & Kubernetes, and cloud platforms (GCP preferred). * Familiarity with and one of Python, Golang, Scala or Node.js is a plus.
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Day Rate: Circa £500 per day (Outside IR35) Location: Hybrid/London - Contract: Initial 3 month contract - About the Role - A major UK public sector organisation is seeking an experienced Technical Business Analyst to support a high-profile digital transformation programme delivering fixed outcomes to challenging timelines. This role is ideal for a detail-driven analyst with strong technical capability, excellent stakeholder management, and a passion for data-led problem-solving. Key Responsibilities * Gather, validate, and document detailed business and technical requirements * Translate business objectives into technical specifications aligned with fixed deliverables and fixed outcomes * Conduct in-depth analysis of existing systems, data flows, integrations, and processes * Work closely with engineering, product, architecture, and delivery teams to shape solution o
Day Rate: Circa £500 per day (Outside IR35) Location: Hybrid/London - Contract: Initial 3 month contract - About the Role - A major UK public sector organisation is seeking an experienced Technical Business Analyst to support a high-profile digital transformation programme delivering fixed outcomes to challenging timelines. This role is ideal for a detail-driven analyst with strong technical capability, excellent stakeholder management, and a passion for data-led problem-solving. Key Responsibilities * Gather, validate, and document detailed business and technical requirements * Translate business objectives into technical specifications aligned with fixed deliverables and fixed outcomes * Conduct in-depth analysis of existing systems, data flows, integrations, and processes * Work closely with engineering, product, architecture, and delivery teams to shape solution o
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6 Month Contract - Reading (Hybrid) £500-525/day (Outside IR35) Start ideally in Dec 2025 / Jan 2026. A chance to work with a global IT Consultancy on a ServiceNow design + integration project for an external client. Hybrid Working - 2 days/week working remotely (WFH) + 3 days/week working from the office in Reading. Paying up to £525/day (Outside IR35). * In-depth hands-on ServiceNow Architecture expertise including design, configuration + implementation. * Deep ServiceNow modules + workflows experience including: ITSM, ITOM, Discovery, ITAM, CSM, HRSD, SecOps, GRC). * Managing integrations between ServiceNow and other systems (via REST, SOAP APIs, IntegrationHub, MID Server, custom integrations), ensuring reliability, security, latency, error handling, monitoring. * Defining + implementing technical governance, architecture operating models, and instance strategy.
6 Month Contract - Reading (Hybrid) £500-525/day (Outside IR35) Start ideally in Dec 2025 / Jan 2026. A chance to work with a global IT Consultancy on a ServiceNow design + integration project for an external client. Hybrid Working - 2 days/week working remotely (WFH) + 3 days/week working from the office in Reading. Paying up to £525/day (Outside IR35). * In-depth hands-on ServiceNow Architecture expertise including design, configuration + implementation. * Deep ServiceNow modules + workflows experience including: ITSM, ITOM, Discovery, ITAM, CSM, HRSD, SecOps, GRC). * Managing integrations between ServiceNow and other systems (via REST, SOAP APIs, IntegrationHub, MID Server, custom integrations), ensuring reliability, security, latency, error handling, monitoring. * Defining + implementing technical governance, architecture operating models, and instance strategy.
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London, UK - Up to £60/hour Outside IR35 - Active SC Clearance required - iO Associates have aligned exclusively with a multi-nation defence alliance to find an MS Dynamics Developer. The ideal candidate would have extensive hands-on experience across the full Dynamics 365 F&O lifecycle, with strong skills in customisation, integrations, automation, Power Platform development, AI-led enhancements, and stakeholder engagement. * Lead customisation, configuration, and enhancement of Dynamics 365 F&O, ensuring scalable, maintainable solutions. * Drive end-to-end delivery across the full ERP lifecycle, including development, integrations, testing, deployment, and post-go-live support. * Build automated workflows and integrations using Power Platform, REST APIs, and low-code tools to improve business processes.
London, UK - Up to £60/hour Outside IR35 - Active SC Clearance required - iO Associates have aligned exclusively with a multi-nation defence alliance to find an MS Dynamics Developer. The ideal candidate would have extensive hands-on experience across the full Dynamics 365 F&O lifecycle, with strong skills in customisation, integrations, automation, Power Platform development, AI-led enhancements, and stakeholder engagement. * Lead customisation, configuration, and enhancement of Dynamics 365 F&O, ensuring scalable, maintainable solutions. * Drive end-to-end delivery across the full ERP lifecycle, including development, integrations, testing, deployment, and post-go-live support. * Build automated workflows and integrations using Power Platform, REST APIs, and low-code tools to improve business processes.
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Role: C++ Developer - Type: Contract (6 Months) Location: UK (Fully Remote) Technical Essentials (Must Haves) * Senior-level C++ expertise with many years of experience. * Strong debugging skills and a proactive test mindset-you will spend significant time triaging issues and mastering system design. Core Developer Traits * Enjoys context shifting and jumping between different projects and domains rapidly. * Overcommunicator who ensures strict alignment to prevent wasted time and effort. * Excellent communication skills-ability to simplify highly complex technical domain information for stakeholders. * A collaborative team player who actively leverages the knowledge of peers. Bonus Experience (Highly Desirable) * Familiarity with playback and orchestration APIs. * Experience in consumer multimedia software (e.g., Netflix, Amazon).
Role: C++ Developer - Type: Contract (6 Months) Location: UK (Fully Remote) Technical Essentials (Must Haves) * Senior-level C++ expertise with many years of experience. * Strong debugging skills and a proactive test mindset-you will spend significant time triaging issues and mastering system design. Core Developer Traits * Enjoys context shifting and jumping between different projects and domains rapidly. * Overcommunicator who ensures strict alignment to prevent wasted time and effort. * Excellent communication skills-ability to simplify highly complex technical domain information for stakeholders. * A collaborative team player who actively leverages the knowledge of peers. Bonus Experience (Highly Desirable) * Familiarity with playback and orchestration APIs. * Experience in consumer multimedia software (e.g., Netflix, Amazon).
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Location: Client sites, remote, or hybrid, depending on project need. Contract Type: Contract - About Us - Triad Group Plc is an award-winning digital, data, and solutions consultancy with over 35 years' experience primarily serving the UK public sector and central government. We deliver high-quality solutions that make a real difference to users, citizens and consumers. At Triad, collaboration thrives, knowledge is shared, and every voice matters. Our close-knit, supportive culture ensures you're valued from day one. Whether working with cutting-edge tech or shaping strategy for national-scale projects, you'll be trusted, challenged, and empowered to grow. We nurture learning through communities of practice and encourage creativity, autonomy, and innovation. If you're passionate about solving meaningful problems with smart and passionate people, Triad could be the pl
Location: Client sites, remote, or hybrid, depending on project need. Contract Type: Contract - About Us - Triad Group Plc is an award-winning digital, data, and solutions consultancy with over 35 years' experience primarily serving the UK public sector and central government. We deliver high-quality solutions that make a real difference to users, citizens and consumers. At Triad, collaboration thrives, knowledge is shared, and every voice matters. Our close-knit, supportive culture ensures you're valued from day one. Whether working with cutting-edge tech or shaping strategy for national-scale projects, you'll be trusted, challenged, and empowered to grow. We nurture learning through communities of practice and encourage creativity, autonomy, and innovation. If you're passionate about solving meaningful problems with smart and passionate people, Triad could be the pl
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PEGA Lead Systems Architect - process/task mining
PEGA Lead Systems Architect - process/task mining
Hays
London
£500.0 - £550.0 per day + up to £550 pd (outside IR35)
Pega Lead Systems Architect - Pega, Process/Task Mining £550 per day (Outside IR35) Remote / London - 6 Months - My client is an instantly recognisable consultancy who seek a PEGA Lead Systems Architect (LSA) to take ownership of designing, architecting, and delivering innovative BPM and CRM solutions using the PEGA Platform, for a well-known end client. * Extensive experience as a PEGA Lead Systems Architect, with a strong focus on enterprise-level solutions. * Prior involvement of at least one implementation with Process/Task Mining * PEGA Lead System Architect (PCLSA) certification is essential. * In-depth knowledge of PEGA frameworks, including Customer Service, Decisioning, and Smart Disputes. * Hands-on expertise in system integrations using SOAP/REST APIs, JMS, MQ, and Kafka. * Comprehensive understanding of case management, decisioning capabilities, and the PE
Pega Lead Systems Architect - Pega, Process/Task Mining £550 per day (Outside IR35) Remote / London - 6 Months - My client is an instantly recognisable consultancy who seek a PEGA Lead Systems Architect (LSA) to take ownership of designing, architecting, and delivering innovative BPM and CRM solutions using the PEGA Platform, for a well-known end client. * Extensive experience as a PEGA Lead Systems Architect, with a strong focus on enterprise-level solutions. * Prior involvement of at least one implementation with Process/Task Mining * PEGA Lead System Architect (PCLSA) certification is essential. * In-depth knowledge of PEGA frameworks, including Customer Service, Decisioning, and Smart Disputes. * Hands-on expertise in system integrations using SOAP/REST APIs, JMS, MQ, and Kafka. * Comprehensive understanding of case management, decisioning capabilities, and the PE
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Braze Platform Administrator / Braze Campaign Builder - Contract Length: 3 Months (w/ Potential Extension) Umbrella Rate: £430 PD (Inside IR35) Location: London - Working Pattern: Hybrid (2 Days on Site PW) We are recruiting multiple Braze-certified Platform Administrators / Campaign Builders for a leading, mass-media and telecommunications company. You will configure, maintain, and optimise the Braze Customer Engagement Platform, working within cross-functional squads to build campaign journeys. This is a technical, hands-on role focused on turning marketing strategy into high-quality Braze builds. Key Responsibilities * Configure Braze settings, integrations, APIs, SDKs * Manage user roles, permissions, and workspaces * Support marketing teams with journey planning and campaign execution * Ensure data accuracy, governance, and compliance * Troubleshoot issues and op
Braze Platform Administrator / Braze Campaign Builder - Contract Length: 3 Months (w/ Potential Extension) Umbrella Rate: £430 PD (Inside IR35) Location: London - Working Pattern: Hybrid (2 Days on Site PW) We are recruiting multiple Braze-certified Platform Administrators / Campaign Builders for a leading, mass-media and telecommunications company. You will configure, maintain, and optimise the Braze Customer Engagement Platform, working within cross-functional squads to build campaign journeys. This is a technical, hands-on role focused on turning marketing strategy into high-quality Braze builds. Key Responsibilities * Configure Braze settings, integrations, APIs, SDKs * Manage user roles, permissions, and workspaces * Support marketing teams with journey planning and campaign execution * Ensure data accuracy, governance, and compliance * Troubleshoot issues and op
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Key Responsibilities * AEM Development:Design, develop, and maintainAEM components,templates * Front-End Integration:Collaborate with UX/UI teams to integrate front-end code (HTML, CSS, JavaScript/React/Angular) into AEM for a responsive user experience. * System Integration:Integrate AEM with other core systems and Adobe Experience Cloud products (likeAdobe Analytics,Adobe Target, andAdobe Campaign) using APIs (e.g., RESTful). * Deployment and Support:Participate in the deployment process, conduct unit and system testing, and troubleshoot/debug issues in AEM environments. * Best Practices:Ensure code quality, security, and performance by adhering to AEM and general software development best practices (agile environment).
Key Responsibilities * AEM Development:Design, develop, and maintainAEM components,templates * Front-End Integration:Collaborate with UX/UI teams to integrate front-end code (HTML, CSS, JavaScript/React/Angular) into AEM for a responsive user experience. * System Integration:Integrate AEM with other core systems and Adobe Experience Cloud products (likeAdobe Analytics,Adobe Target, andAdobe Campaign) using APIs (e.g., RESTful). * Deployment and Support:Participate in the deployment process, conduct unit and system testing, and troubleshoot/debug issues in AEM environments. * Best Practices:Ensure code quality, security, and performance by adhering to AEM and general software development best practices (agile environment).
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Location: Hybrid / London - Contract: 3 Months initially - Clearance: Active SC clearance required - Ready to take ownership of complex technical delivery in a fast-paced, secure environment? We're looking for a seasoned Technical Delivery Manager who can drive outcomes, unite engineering teams, and keep delivery on track across multiple workstreams. * Lead end-to-end delivery across technical squads, ensuring milestones are hit and risks stay low * Coordinate engineers, architects, and product teams to keep delivery smooth and predictable * Translate technical detail into clear plans, roadmaps, and stakeholder updates * Unblock teams, manage dependencies, and ensure technical decisions support long-term strategy * Own delivery governance in a high-trust, security-focused environment * Proven experience delivering complex technology projects
Location: Hybrid / London - Contract: 3 Months initially - Clearance: Active SC clearance required - Ready to take ownership of complex technical delivery in a fast-paced, secure environment? We're looking for a seasoned Technical Delivery Manager who can drive outcomes, unite engineering teams, and keep delivery on track across multiple workstreams. * Lead end-to-end delivery across technical squads, ensuring milestones are hit and risks stay low * Coordinate engineers, architects, and product teams to keep delivery smooth and predictable * Translate technical detail into clear plans, roadmaps, and stakeholder updates * Unblock teams, manage dependencies, and ensure technical decisions support long-term strategy * Own delivery governance in a high-trust, security-focused environment * Proven experience delivering complex technology projects
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Skilled in API development and microservices architecture
Skilled in API development and microservices architecture
The ideal candidate will also have strong API integration skills and, preferably, experience with quoting and billing systems such as Zuora. * API Expertise: Design and implement integrations using REST and SOAP APIs. * Have a solid understanding of API integrations (REST/SOAP).
The ideal candidate will also have strong API integration skills and, preferably, experience with quoting and billing systems such as Zuora. * API Expertise: Design and implement integrations using REST and SOAP APIs. * Have a solid understanding of API integrations (REST/SOAP).
Define and document integration standards, including API strategies, event schemas, and interface contracts to enable decoupled, reusable services * Strong proficiency in API design (REST/GraphQL), microservices architecture, and middleware solution
Define and document integration standards, including API strategies, event schemas, and interface contracts to enable decoupled, reusable services * Strong proficiency in API design (REST/GraphQL), microservices architecture, and middleware solution
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Recommend authentication and security methods (OAuth 2.0, JWT, API keys)
Recommend authentication and security methods (OAuth 2.0, JWT, API keys)
Background in developing with C#, .NET, Web Services, Web Forms, MVC, JavaScript, jQuery, CSS, HTML, React, Web APIs and Visual Studio, API integrations
Background in developing with C#, .NET, Web Services, Web Forms, MVC, JavaScript, jQuery, CSS, HTML, React, Web APIs and Visual Studio, API integrations
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The Solutions Architect organization has responsibility for pre- and post-sales client service and is the primary contact of end users of Channels Data Delivery Solutions products (Xpressfeed, API, Cloud Services).
The Solutions Architect organization has responsibility for pre- and post-sales client service and is the primary contact of end users of Channels Data Delivery Solutions products (Xpressfeed, API, Cloud Services).
Build your future with Sovos. If you're seeking a career where innovation meets impact, you've come to the right place. As a global leader, Sovos is transforming tax compliance from a business requirement to a force for growth while revolutionising how businesses navigate the ever-changing regulatory landscape. At Sovos, we're dedicated to more than just solving compliance challenges we're committed to making a positive and lasting difference in everything we do. Our teams operate on the modern edge of digital technology, working not only to solve complex business challenges but also to enrich our personal, professional, and local communities. Our purpose-built systems provide the tools you need to thrive in a world where governments demand increased visibility, faster reporting and greater control over business processes. Excited about the possibilities? So are we!
Build your future with Sovos. If you're seeking a career where innovation meets impact, you've come to the right place. As a global leader, Sovos is transforming tax compliance from a business requirement to a force for growth while revolutionising how businesses navigate the ever-changing regulatory landscape. At Sovos, we're dedicated to more than just solving compliance challenges we're committed to making a positive and lasting difference in everything we do. Our teams operate on the modern edge of digital technology, working not only to solve complex business challenges but also to enrich our personal, professional, and local communities. Our purpose-built systems provide the tools you need to thrive in a world where governments demand increased visibility, faster reporting and greater control over business processes. Excited about the possibilities? So are we!
Experience with cloud integration services such as Azure API Management, Service Bus, Event Grid, and Functions.
Experience with cloud integration services such as Azure API Management, Service Bus, Event Grid, and Functions.
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Optimise page load speed, rendering performance, and API response times. * Familiarity with RESTful API design and backend performance considerations.
Optimise page load speed, rendering performance, and API response times. * Familiarity with RESTful API design and backend performance considerations.
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Experience with cloud-based data storage solutions and building efficient API routes in Node.js.
Experience with cloud-based data storage solutions and building efficient API routes in Node.js.
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Familiarity with the WebGL API and rendering pipelines is a plus. * Strong knowledge of the HTML5 Canvas API.
Familiarity with the WebGL API and rendering pipelines is a plus. * Strong knowledge of the HTML5 Canvas API.
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