15 of 15 Contract API Development Jobs in England

API Backend Engineer (MCP)

Hiring Organisation
AMS Contingent
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
Salary negotiable
services span across Business Services, Corporate banking, Wealth Management, Group Functions, Retail and Investment Banking.On behalf of this organisation, AMS are looking for an API Backend Engineer (MCP) for a 6 Months contract based in Edinburgh or London (Hybrid). Purpose of the Role: As API Backend Engineer … will be responsible for designing, building, and operating secure, scalable APIs and backend services in cloud-native environments. The role centres on API development using modern API gateways on AWS or GCP, applying API standards, DevSecOps, and industry best practices, and delivering solutions within SCRUM agile ...

Full Stack Software Engineer

Hiring Organisation
Brio Digital
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
GBP 550 Daily
within an agile delivery team, building and enhancing modern, cloud-native applications used by thousands of end users. This role requires strong full-stack development expertise across .NET, Vue.js and Azure, alongside previous experience delivering solutions within Government, NHS, or wider public sector environments. Key Responsibilities Design, develop … security, performance and compliance standards Essential Skills & Experience Strong commercial experience with: C#/.NET Core/.NET 6+ Vue.js JavaScript/TypeScript REST API development and integration SQL Server and relational databases Hands-on experience with Microsoft Azure, including services such as: App Services Azure Functions Azure ...

Full Stack Software Engineer

Hiring Organisation
Brio Digital
Location
London, Baker Street, United Kingdom
Employment Type
Contract
Contract Rate
£550/day
within an agile delivery team, building and enhancing modern, cloud-native applications used by thousands of end users. This role requires strong full-stack development expertise across .NET, Vue.js and Azure, alongside previous experience delivering solutions within Government, NHS, or wider public sector environments. Key Responsibilities Design, develop … security, performance and compliance standards Essential Skills & Experience Strong commercial experience with: C#/.NET Core/.NET 6+ Vue.js JavaScript/TypeScript REST API development and integration SQL Server and relational databases Hands-on experience with Microsoft Azure, including services such as: App Services Azure Functions Azure ...

OSS/BSS Solution architect

Hiring Organisation
IBU CONSULTING LTD
Location
London, United Kingdom
Employment Type
Contract
Product Catalogue, CRM (Salesforce), Billing, Service Orchestration, Inventory, Service Assurance - understanding data models, system processes and integration patterns at implementation level - Integration architecture: microservices, API gateways, event-driven architectures, event brokers (Kafka), queues - handling 120+ integration points across systems and legacy stacks - Lead-to-Cash (L2C) and Order … Cash (O2C) solutions in Tier-1 telecom operator environments - TMF standards: Product Ordering (TMF641), Service Ordering, Service Activation, Service Inventory (TMF638) API Development & Integration - Strong expertise in API lifecycle design using OpenAPI specifications (OAS) - can read and write API specs - Hands-on with TMF/ ...

Senior Integration Engineer

Hiring Organisation
ifndautoparts
Location
Towcester, Northamptonshire, East Midlands, United Kingdom
Employment Type
Contract, Work From Home
ifndautoparts is a family-owned and founder-led company. We operate with a lean, highly collaborative structure and work closely with specialist contractors and development partners to deliver projects and scale the platform. As we expand our business seller network, we are looking for an experienced Senior Integration Engineer … helping business sellers connect and synchronise their inventory with the ifndautoparts marketplace. You will work directly with the founders, onboarding team, and external development partners to help shape the future of seller integrations across the platform. The Role As our Senior Integration Engineer, you will be responsible for designing ...

Java Software Engineer

Hiring Organisation
Sanderson Recruitment
Location
South West London, London, United Kingdom
Employment Type
Contract
Contract Rate
Up to £600 per day + Inside IR-35
working on backend services hosted in Azure. The role focuses on building and supporting Java applications and APIs, using VS Code as a primary development environment. You'll work closely with other engineers across backend, frontend, and DevOps, contributing to cloud-based systems. About the role Java backend development … with frontend, QA and DevOps teams Participate in code reviews and technical discussions Required skills Strong commercial Java experience Spring/Spring Boot REST API development Azure experience (App Services, AKS, or similar) VS Code for day-to-day development Git and version control Experience with relational ...

Senior Backend Python Developer

Hiring Organisation
ARM
Location
Leeds, West Yorkshire, United Kingdom
Employment Type
Contract
Contract Rate
£400 - £450/day
standards. Implement business logic, data access layers, and integrations with internal and external systems. Develop and enhance RESTful APIs, following defined contracts and API standards. Write clean, maintainable, well-tested code, adhering to agreed engineering best practices. Contribute unit and integration tests to ensure functional correctness and regression safety. … assigned work. Follow established security, performance, and reliability guidelines when implementing backend changes. Skills & Experience Core backend engineering 3-6+ years of backend development experience. Strong experience with Python or equivalent backend frameworks. Solid understanding of REST API development, request/response models, and error handling. ...

Software Engineer

Hiring Organisation
Brio Digital
Location
Leeds, West Yorkshire, United Kingdom
Employment Type
Contract
Contract Rate
£500/day
supporting a major NHS digital transformation programme and are looking for three experienced Full Stack .NET Developers. You'll be working on the development and enhancement of critical healthcare applications, helping deliver scalable, secure, cloud-native solutions that directly support NHS services and patient outcomes. This is an excellent …/CD pipelines and modern DevOps practices Essential Skills & Experience Backend Strong commercial experience with: C# .NET/.NET Core ASP.NET Core REST API development SQL Server Frontend Strong experience with: React TypeScript JavaScript HTML5 CSS3 Cloud & DevOps Strong Azure experience CI/CD pipelines Infrastructure and deployment ...

Integration Lead - Secure Digital Platform

Hiring Organisation
ARM
Location
Reading, Berkshire, United Kingdom
Employment Type
Contract
Clearance - current and active SC Cleared already is strongly preferred Role Description The Integration Lead is responsible for leading the technical design, development, and delivery of secure, scalable, and reusable foundational technology services within the Secure Digital Platform. The Integration Lead partners with Delivery Leads, product owners and architects … delivered solutions align with solution designs and security guardrails. Guide teams in the selection and use of modern tools, frameworks, and platforms that optimise development efficiency and operational effectiveness for delivery. Support the development and evolution of the Secure Digital Platform roadmap by identifying technical dependencies, enablers ...

Full Stack Engineer - Investment Management

Hiring Organisation
CBSbutler Holdings Limited
Location
City of London, London, United Kingdom
Employment Type
Contract, Work From Home
Contract Rate
£800 - £1200 per day
drive engineering modernisation, cloud adoption, and scalable analytics capabilities within a fast-paced financial environment. You will play a key role in the design, development, and enhancement of enterprise-grade investment and credit trading technology solutions. The role combines hands-on engineering with modern cloud-native delivery practices, automation … assisted software development approaches Responsibilities include: * Develop and enhance full-stack applications supporting investment and trading workflows * Build and optimise cloud-based data platforms and pipelines using Snowflake and DBT * Deliver reporting and analytics solutions using Sigma and Power BI * Support .NET application modernisation and API development ...

SC Cleared Node.js Developer

Hiring Organisation
Sanderson Recruitment
Location
London, United Kingdom
Employment Type
Contract, Work From Home
Contract Rate
Up to £560 per day + Inside IR-35
maintainable code Working with shared/common government tech stacks (Node.js, PostgreSQL, Redis) Investigating and resolving technical issues across the stack Applying secure development practices, including OWASP principles and vulnerability management Collaborating with stakeholders and communicating technical concepts clearly Tech stack includes: Node.js, HAPI (web framework) API development … DevOps, Jenkins, GitHub Actions) Jira and Azure DevOps for workflow management What we're looking for: Active SC Clearance (essential) Strong experience with Node.js development in production environments Ability to communicate with both technical and non-technical stakeholders Experience breaking down work, refining backlog items, and defining acceptance criteria ...

Senior AI Engineer

Hiring Organisation
IO Associates
Location
City, London, United Kingdom
Employment Type
Contract
Contract Rate
GBP 700 Daily
LlamaIndex, Hugging Face), and vector databases (eg, Pinecone, Qdrant, Milvus, Chroma). Software Fundamentals: Background in solid software engineering practices (Git, testing, design patterns, API development via FastAPI/Flask). Cloud Infrastructure: Experience deploying to secure cloud environments (AWS, Azure, or GCP) utilizing standard K8s distributions ...

Senior Back End Developer (Python/Azure)

Hiring Organisation
TXP
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
£500 - £550/day
based - once a week in London Role Hands-on backend developer building and integrating Python-based services within a secure, enterprise environment. Focus on API development, system integration, and reliable delivery. Key Responsibilities Build backend services using Python (FastAPI) Develop APIs and integrate across disconnected systems Deploy solutions ...

Automation Developer

Hiring Organisation
Guidant Global
Location
Gloucester, Gloucestershire, South West, United Kingdom
Employment Type
Contract
Contract Rate
£500 - £600 per day
technical audiences Support adoption and continual improvement of automation best practices Essential Skills & Experience Strong knowledge of JavaScript (particularly for rules engine API development) Understanding of SQL for database queries Experience working with JSON data structures Rudimentary knowledge of Java , particularly for data type definitions within ODM tools ...

GOG1JP00004398-Software Engineer (II)

Hiring Organisation
Randstad Technologies
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£349 - £369 per day
drive a massive roadmap spike for highly mature sales, marketing, and event analytics platforms. Your Toolkit Front-End Firepower: High proficiency in modern web development using the latest Angular (17/18) and TypeScript. Backend Mastery: Solid experience with API development, Object-Oriented Programming (OOP), and service ...