1 to 25 of 30 Contract API Integration Jobs in the UK

ComfyUI Workflow Developer

Hiring Organisation
FourPointZero
Location
East London, London, United Kingdom
Employment Type
Contract
Contract Rate
From £500 to £600 per day
Developer, you'll create ComfyUI workflows that generate high-resolution brand imagery at volume using AI models without sacrificing brand quality. Custom AI pipelines, API integration with their content systems, and quality validation that works for luxury market expectations. This has to work in production, not just look … good in a deck. POC sprint proves: AI workflow architecture that actually scales Quality output matching existing CGI standards Integration approach for brand DAM systems Production roadmap client can commit budget to Production phase builds: Full AI pipeline deployment handling real campaign volumes Scale automation that doesn't break ...

Senior DevOps Integration Engineer

Hiring Organisation
CBSbutler Holdings Limited trading as CBSbutler
Location
Knutsford, Cheshire, United Kingdom
Employment Type
Contract
Contract Rate
£600 - £629/day
Role: Senior DevOps Integration Engineer Location: Hybrid - 60% onsite/40% remote - Cheshire Contract Length: Until 30/11/2026 Rate: £600 to £630 per day Role Overview We're looking for a Senior DevOps Integration Engineer to take ownership of designing, automating, and integrating modern … Implement monitoring, logging, and alerting integrations Collaborate with engineering, SRE, and security teams to embed DevOps best practices Troubleshoot pipeline failures, environment inconsistencies, and integration issues Drive continuous improvement, performance optimisation, and platform resilience Produce clear documentation, automation standards, and reusable tooling Required Skills & Experience Strong hands-on experience ...

DevOps Engineer

Hiring Organisation
Stackstudio Digital Ltd
Location
Wokingham, Berkshire, South East, United Kingdom
Employment Type
Contract, Work From Home
Contract Rate
From £500 to £550 per day
tools (Azure Monitor, App Insights). Improve SQL query performance for applications and MLOps workflows. Perform proactive monitoring, troubleshooting, and enhancement of application functionality. Integration & Documentation Integrate third-party APIs/services ensuring seamless communication. Document technical decisions, architectural flows, and implementation details in Confluence. Use Azure Storage … able to collaborate effectively with cross-functional teams including Architects, DevOps Engineers, and Data teams. A strong understanding of cloud automation, application security, API integration, and Azure-native services is essential. The individual should bring a problem-solving mindset, strong communication skills, and the ability to diagnose ...

Senior Front-End Engineer

Hiring Organisation
McGregor Boyall
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£700 - £800 per day
Build a React & TypeScript application from greenfield to production Develop data-heavy interfaces including dashboards, tables, filtering and workflows Implement robust state management and API integration Optimise performance for large datasets and interactive UIs Collaborate with backend teams on API contracts and integration Maintain high standards ...

API Security Architect

Hiring Organisation
Eteam Workforce Limited
Location
Knutsford, Cheshire, North West, United Kingdom
Employment Type
Contract
Contract Rate
£740 per day
Role Title: API Security Architect Location: Knutsford/Hybrid Duration: 30/11/202 Role Description: "We are looking for an API Security Architect to define, design, and oversee the implementation of enterprise-grade API security architecture. The role ensures APIs are built securely, follow best … practice standards, and align with organisational security and compliance requirements. Key Responsibilities Design end-to-end API security architecture across cloud and on-premise environments. Define API security standards covering authentication, authorization, encryption, and threat protection. Lead architectural reviews, threat modelling, and risk assessments for API integrations. ...

Senior Android Developer

Hiring Organisation
scrumconnect ltd
Location
Surrey, United Kingdom
Employment Type
Contract
Contract Rate
GBP Annual
standards Conduct code reviews and contribute to engineering best practices within the team Integrate with RESTful APIs and Back End services, working closely with API developers Troubleshoot and resolve performance issues, crashes, and production defects Support Google Play Store submission processes and manage release cycles Contribute to technical documentation … with test-driven development practices Hands-on experience with CI/CD tools (eg Gradle, Fastlane, Jenkins, Azure DevOps, GitHub Actions) Understanding of RESTful API integration and networking best practices Familiarity with accessibility standards (WCAG 2.2) and building inclusive mobile interfaces Experience working in Agile or hybrid delivery ...

Power Platform Technical Architect

Hiring Organisation
ARM
Location
London, United Kingdom
Employment Type
Contract
Model-Driven Apps) - Power Automate (Cloud & Desktop flows) - Power BI - Dataverse - Power Platform governance & security Strong understanding of: - Azure services (Azure Functions, Logic Apps, API Management, Service Bus) - Microsoft 365 ecosystem - REST APIs and custom connectors - Identity & access management (Azure AD/Entra ID) - Experience implementing ALM using Azure … DevOps or GitHub. - API integration to external systems Domain Knowledge: - Knowledge of Insurance domain and specialty insurance - Underwriting workbench or similar experience desirable - Knowledge of Policy Admin, Claims platform integration - Strong knowledge of solution architecture patterns and integration design. Disclaimer: This vacancy is being advertised ...

Senior IOS Developer

Hiring Organisation
scrumconnect ltd
Location
Surrey, United Kingdom
Employment Type
Contract
Contract Rate
GBP Annual
standards Conduct code reviews and contribute to engineering best practices within the team Integrate with RESTful APIs and Back End services, working closely with API developers Troubleshoot and resolve performance issues, crashes, and production defects Support App Store submission processes and manage release cycles Contribute to technical documentation, architecture … working with test-driven development practices Hands-on experience with CI/CD tools (eg Xcode Cloud, Fastlane, Jenkins, Azure DevOps) Understanding of RESTful API integration and networking best practices Familiarity with accessibility standards (WCAG 2.2) and building inclusive mobile interfaces Experience working in Agile or hybrid delivery ...

Open Shift Administrator

Hiring Organisation
Stealth IT Consulting Limited
Location
Sheffield, South Yorkshire, Yorkshire, United Kingdom
Employment Type
Contract, Work From Home
Contract Rate
From £350 to £400 per day Inside IR35
infrastructure engineering Hands-on RedHat OpenShift administration (essential) Strong scripting skills: Python, PowerShell, Shell Container technologies: Docker, Kubernetes Automation tools: Ansible, Jenkins REST API integration Experience working in regulated enterprise environments Version control: Git/SVN Ability to work independently and manage deliverables Ideal Candidate Background Previous experience ...

Umbraco Developer

Hiring Organisation
Hays
Location
City of London, London, United Kingdom
Employment Type
Contract, Work From Home
content and data migration, and ensuring compatibility with modern .NET and Umbraco best practices. You will update document types, custom data components, dependencies, and API integrations, resolving any breaking changes introduced across previous versions. You'll work closely with internal stakeholders across product, design, and QA to ensure ...

Umbraco Developer

Hiring Organisation
Hays Specialist Recruitment Limited
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
Salary negotiable
handling content and data migration, and ensuring compatibility with modern .NET and Umbraco best practices.You will update document types, custom data components, dependencies, and API integrations, resolving any breaking changes introduced across previous versions. You'll work closely with internal stakeholders across product, design, and QA to ensure ...

Frontend CRO Developer

Hiring Organisation
Harnham - Data & Analytics Recruitment
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£250 - £300 per day
HTML, CSS and JavaScript. * Experience in CRO experimentation and A/B testing, with familiarity across major testing platforms. * Understanding of backend technologies and API integrations in support of experimentation. * Strong problem solving ability and attention to detail when designing and implementing tests. * Confident communicating technical concepts with both ...

RPA Consultant

Hiring Organisation
Adecco
Location
Surrey, England, United Kingdom
Employment Type
Contractor
Contract Rate
£550 - £700 per day
Looking For: Basic programming knowledge (Python, Java, C#). Proficiency in RPA tools (e.g., UiPath, Blue Prism, Automation Anywhere). Strong SQL and database integration skills. Experience in workflow and UX design. Solid understanding of business process analysis and BPM. Excellent problem-solving and debugging skills. Experience with APIintegration and UI automation. Experience in testing, deployment, and bot maintenance. Exceptional communication, teamwork, and strategic planning abilities. Relevant certifications that validate your expertise. If you're excited about the prospect of revolutionising business processes through automation, don't wait! Apply now and embark on an exciting journey with ...

PEGA LSA

Hiring Organisation
iBSC
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
GBP Annual
platforms, Experience with Java, JavaScript, HTML, CSS, and XML, Understanding of databases like Oracle, SQL Server, and MySQL, Knowledge of web services, REST, and API integrations. ...

Data Visualisation Engineer

Hiring Organisation
Hays
Location
Swindon, Wiltshire, South West, United Kingdom
Employment Type
Contract
Contract Rate
Up to £546.0 per day + £546 Per Day Inside IR35
understanding of data pipelines. - Experience working with SharePoint, GitHub and CI/CD workflows. RESPONSIBILITIES - Build and integrate data pipelines within AWS ecosystems, including API Integrations, PowerBI gateways and Serverless workflows, (Lambda). - Design and implement data solutions using storage and processing technologies, e.g. MySQL, PostgreSQL, SharePoint ...

Rubrik IT Engineer - Rubrik Backup and Hybrid Cloud Protection

Hiring Organisation
Experis
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
£600/day
infrastructure. * Experience protecting Azure and Office 365 workloads through Rubrik. * Strong troubleshooting ability and governance understanding. Desirable Skills * Experience with other enterprise backup suites. * API integration exposure. * Disaster recovery planning. Professional Attributes * Methodical and governed by best practice. * Confident decision maker. * High accountability. * Strong interpersonal skills. Qualifications * Rubrik ...

Python Full Stack Developer

Hiring Organisation
Syntax Consultancy Limited
Location
City of London, London, United Kingdom
Employment Type
Contract, Work From Home
Contract Rate
£550 Per Day Inside IR35
Digital transformation business specialising in Government projects: Key experience, responsibilities + tasks: Strong Python development expertise , develop and maintain Python code for data processing, API development and integration with the Azure Databricks environment. Senior experience in software development, with a focus on both front-end and back ...

Security Engineer

Hiring Organisation
Atrium Global
Location
Cheshire, North West, United Kingdom
Employment Type
Contract
Contract Rate
Up to £700 per day
HSMs) such as Thales , Entrust or IBM platforms Infrastructure and security engineering across Windows, Unix/Linux, networking and firewalls Python-based automation, REST API integration and workflow improvement within secure environments These are build-focused engineering roles not support or helpdesk positions. Candidates should have experience working ...

Technical Program Manager & BA - Fintech (Fulltime / Contract)

Hiring Organisation
Randstad Technologies Recruitment
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£400 - £500/day
Must-Haves: 5+ years exp. in Enterprise Tech delivery. Strong hands-on knowledge of Salesforce & Microsoft Power Platform (Apps, Automate, BI). Experience with API integrations & Agile (JIRA). This is an urgent vacancy with a deadline where the hiring manager is shortlisting for an interview immediately. Please apply ...

Software Engineer - Blazor

Hiring Organisation
Future Talent Group Ltd
Location
Newbury, Berkshire, South East, United Kingdom
Employment Type
Contract, Work From Home
Contract Rate
From £450 to £500 per day
experience building applications with Blazor (Server or WebAssembly) Experience delivering rich, interactive web UIs with a focus on performance and usability Solid understanding of API integration (REST, GraphQL, etc.) Experience working with .NET (Core/5/6/7+) as the supporting backend framework Ability to work ...

Head of Infrastructure

Hiring Organisation
Stealth IT Consulting Limited
Location
Knutsford, Cheshire, North West, United Kingdom
Employment Type
Contract
Contract Rate
From £600 to £650 per day Inside IR35
mover-leaver (JML) automation, RBAC, and least-privilege access. Manage operational KPIs for IAM stability, resilience, and performance . Drive continuous improvement through automation, API integration, and provisioning optimisation . Collaborate with Cyber Security, Cloud Engineering, Application Teams, and Compliance to ensure IAM controls meet regulatory standards ...

Cyber Asset Management Engineer

Hiring Organisation
Randstad Digital
Location
Edinburgh, Midlothian, Scotland, United Kingdom
Employment Type
Contract
done asset management engineering before - either with an Axonius-type platform or in vulnerability management, EDR engineering, or cloud security engineering with heavy API integration work. Don't need to know everything on day one, but they must be strong technically, fast learners, and able ...

Senior Cloud Full Stack Developer

Hiring Organisation
James Newbury
Location
Houghton Regis, Bedfordshire, United Kingdom
Employment Type
Contract
Contract Rate
GBP 60,000 - 80,000 Annual
Responsibilities Design, build, and maintain AWS infrastructure-as-code deployments using Terraform and related tooling. Manage and optimize serverless microservices, including Lambda functions, API Gateway, and Amplify-hosted applications. Support and enhance Python-based Lambda microservices and Node.js backend components. Maintain and develop React-based front-end applications, including … complex UI components and dynamic API integrations. Oversee database administration for MySQL/RDS Apply strong security best practices across infrastructure, applications, and data flows. Provide maintenance and incremental improvements to legacy .NET applications where required. Produce and maintain clear technical documentation for infrastructure, services, and processes. Collaborate effectively ...

Senior Cloud Full Stack Developer

Hiring Organisation
James Newbury
Location
Houghton Regis, Central Bedfordshire, Bedfordshire, United Kingdom
Employment Type
Contract, Temporary
Salary
£60000 - £80000/annum +parking+28 days hols+pension
Responsibilities Design, build, and maintain AWS infrastructure-as-code deployments using Terraform and related tooling. Manage and optimize serverless microservices, including Lambda functions, API Gateway, and Amplify-hosted applications. Support and enhance Python-based Lambda microservices and Node.js backend components. Maintain and develop React-based front-end applications, including … complex UI components and dynamic API integrations. Oversee database administration for MySQL/RDS Apply strong security best practices across infrastructure, applications, and data flows. Provide maintenance and incremental improvements to legacy .NET applications where required. Produce and maintain clear technical documentation for infrastructure, services, and processes. Collaborate effectively ...

Senior Data BA (Insurance - Delegated Authority)

Hiring Organisation
Harvey Nash
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
£650 - £680 per day
z2bz0 years of experience. You've been through the fires of enterprise transformation and speak the language of Bordereaux , Solvency II , and API integration . You don't just find gaps; you build the bridge to cross them. ** PLEASE NOTE THAT SPONSORSHIP IS NOT AVAILABLE - YOU MUST ...