8 of 8 Remote/Hybrid Contract API Development Jobs

AI ML Engineer

Hiring Organisation
Stackstudio Digital Ltd
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
From £425 to £450 per day
GenAI, Gemini, or open-source LLMs; train, fine-tune, and onboard new LLMs Experience in building GenAI applications using Python Hands-on experience with API development and microservices architecture and end-to-end integrations Knowledge of RAG (Retrieval-Augmented Generation) and ADK, MCP Solid understanding of LLMs, prompt … engineering, and graph-based workflows Hands-on experience with API development and microservices architecture Experience in CI/CD pipelines and containerization (Docker/Kubernetes), Harness, and Git Actions Build scalable data pipelines and workflows on GCP (Big Query, Vertex AI, Dataflow, Pub/Sub, Redis and NoSQL ...

Data Integration Developer

Hiring Organisation
Hays
Location
Birmingham, West Midlands, United Kingdom
Employment Type
Contract, Work From Home
Contract Rate
£500.0 - £525.0 per day + £525 outside IR35
MariaDB Database Backups from Learning Pool - Existing Data Lake assets - Power BI consumption layer In parallel, they are implementing Learning Pool User Provisioning via API, enabling automated CRUD operations for LMS accounts. A dedicated resource is required to deliver the ingestion pipelines, modelling, API integrations, and operational components. … API Development - Build integration to the Learning Pool External Extended API for Create, Retrieve, Update, and Delete LMS users. - Implement all mandatory and optional schema attributes, including: Organisation hierarchy Position hierarchy Manager/appraiser assignments Custom fields Preferences Implement robust error-handling for all LP error codes. ...

Mainframe Developer (6-Month Contract) - London (Hybrid)

Hiring Organisation
Hamilton Barnes
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
GBP 430 Daily
environment using modern toolsets. Key Responsibilities Design, develop, and maintain CICS web services and ZOS Connect EE/DB2 REST services. Work with Mainframe development tools such as FileAid, Xpediter, IBM Explorer for ZOS, and Visual Studio. Develop and maintain APIs using SOAP, WSDL, and JSON, ensuring robust … . What You Will Ideally Bring Proven experience with ZOS Connect EE and DB2 REST . Extensive knowledge of CICS web services . Java development experience, including OOP and functional programming (Java 8+). Familiarity with Spring Boot , annotations, and configuration for simplified deployment. RESTful API development ...

Backend Software Engineer

Hiring Organisation
Bruin Financial & Professional Services
Location
Manchester, Lancashire, England, United Kingdom
Employment Type
Contractor
Contract Rate
£550 - £650 per day
office, Tuesday–Thursday), the successful candidate will be responsible for designing, developing, and maintaining modern cloud-based systems. You will work across backend development, DevOps, and infrastructure as code, collaborating closely with global teams in Australia, the U.S., and locally in Manchester. Key Responsibilities: Backend Development (50%) Design … collaboration with Product Owners. DevOps/Cloud Operations (40%) Work with AWS to manage, optimise, and secure cloud infrastructure. Deploy and maintain services across development, testing, and production environments. Detect and prevent security threats, including account takeover attempts. Drive continuous improvement in technical standards, tools, and processes. Infrastructure ...

Senior Risk Python Developer

Hiring Organisation
Hays
Location
London, United Kingdom
Employment Type
Contract, Work From Home
Contract Rate
£875.0 - £900.0 per day + Up to £900pd Umbrella
currently working with a London-based financial services client who are actively seeking a senior Python developer to work on the development of a business critical application within the risk space. What you'll need to succeed : Extensive Python application development experience within financial services - must have. Strong … API development experience. Strong experience with Django or similar. Javascript experience - nice to have. Strong risk knowledge, and a good mathematical background. Extensive experience working with and analysing large quantities of data. Strong SQL experience. What you'll get in return: Up to £900pd umbrella. London-based hybrid ...

Mainframe Developer with CICS Webservices

Hiring Organisation
Stackstudio Digital Ltd
Location
London, United Kingdom
Employment Type
Contract, Work From Home
Contract Rate
From £350 to £400 per day
week Key Skills Required Mainframes CICS Webservices Required Skills Experience working in ZOS Connect EE and DB2 REST, with extensive knowledge in CICS webservices. Development experience using FileAid, Xpeditor, IBM Explorer for z/OS, and Visual Studio. Proficient with SOAP, WSDL, and JSON, with a comprehensive understanding … including OOP and functional programming (Java 8+). Familiarity with Spring Boot annotations, configuration, and how it simplifies Spring application setup and deployment. RESTful API development experience. Option 2: Integration & Middleware Skills Hands-on experience using DataPower appliances. Development experience using XSLT, Gateway Script, and XPath. ...

Mainframe Developer with CICS Webservices

Hiring Organisation
Infoplus Technologies UK Ltd
Location
London, United Kingdom
Employment Type
Contract, Work From Home
Contract Rate
From £400 to £450 per day
skills/knowledge/experience: (As applicable) Required skills: Experience working in ZOS connect EE and DB2 Rest and extensive knowledge in CICS webservices Development experience using FileAid, Xpeditor, IBM explorer for ZOS, Visual studio. Proficient with SOAP, WSDL and JSON. A comprehensive understanding of SOA and Restful APIs … Java including OOP, functional programming (java 8+) Familiarity with Spring Boot's annotations, configuration, and how it simplifies Spring application setup and deployment. Restful API development experience Or/and Hands-on experience using DataPower appliances Development experience using XSLT, Gateway Script and XPath ...

React Native developer

Hiring Organisation
Experis
Location
Knutsford, Cheshire, United Kingdom
Employment Type
Contract
Contract Rate
£430/day
focused engineering team building modern, scalable applications using React Native (Web) and Java . This is a hands-on role requiring strong full-stack development capability, disciplined engineering practices, and experience working in Agile environments. The role involves contributing across the full software development lifecycle, from design … development through testing, deployment, and ongoing support, with a strong emphasis on code quality, security, and automation. Key Responsibilities Design, develop, and maintain React Native (Web) applications with a focus on performance, reliability, and maintainability Build and support Java-based backend services for enterprise-scale applications Design and implement ...