51 to 75 of 162 API Design Jobs in England

Senior Software Developer

Hiring Organisation
Oscar Associates (UK) Limited
Location
Newcastle Upon Tyne, Tyne and Wear, North East, United Kingdom
Employment Type
Permanent
Salary
£55,000
Stack Developer - Remote - Competitive Salary I'm working with an exciting organisation that is looking to appoint a Senior Full Stack Developer to help design and deliver secure, cloud-native applications within a modern Microsoft and Azure ecosystem. This is an excellent opportunity for an experienced full-stack engineer … maintaining unit and frontend tests (NUnit and ViTest) Contributing to CI/CD pipeline improvements and secure deployment practices Participating in architecture and technical design reviews Ensuring all development aligns with OWASP security best practices Tech Stack & Environment Core technologies: .NET 10/ASP.NET Core Angular 21 (mandatory) DevExpress ...

Data Architect

Hiring Organisation
Damia Group Ltd
Location
Chiswick, London, United Kingdom
Employment Type
Permanent
Salary
£70000 - £90000/annum
Align data architecture with security, compliance, and data governance requirements Lead the evolution of technical architecture documentation, models, and decision records Conduct architecture and design reviews with cross-functional teams Guide teams in the adoption of best practices in API design, modularity, cloud-native patterns, and event … driven systems Recommend data management best practices, covering data flows, architecture patterns, retention, archival, and purging strategies Coach and mentor engineers on data design, refactoring, and architectural reasoning Essential skills and experience: Proven experience designing and scaling enterprise-grade cloud data platforms (AWS preferred) Deep experience with AWS, Databricks ...

API Engineer

Hiring Organisation
Halian Technology Limited
Location
North West England, UK
fast-growing, award-winning software company that delivers end-to-end cloud solutions for practices and businesses. They are looking for an API Engineer to join the team, where you'll be building API infrastructure that enables their product, third party integrations, their users and AI services … interact with their established product portfolio. Key Responsibilities: Design and implement RESTful APIs that expose product capabilities to AI services and third-party integrations Build production-grade APIs using C# .NET, SQL, and Azure services Implement authentication and authorization using OAuth and modern security patterns Write clean, maintainable, well ...

API Engineer

Hiring Organisation
Halian Technology Limited
Location
Warwick, Warwickshire, West Midlands, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£60,000
fast-growing, award-winning software company that delivers end-to-end cloud solutions for practices and businesses. They are looking for an API Engineer to join the team, where you'll be building API infrastructure that enables their product, third party integrations, their users and AI services … interact with their established product portfolio. Key Responsibilities: Design and implement RESTful APIs that expose product capabilities to AI services and third-party integrations Build production-grade APIs using C# .NET, SQL, and Azure services Implement authentication and authorization using OAuth and modern security patterns Write clean, maintainable, well ...

React Developer

Hiring Organisation
Robert Half
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
Salary negotiable
data synchronisation strategies. * Ensure front-end performance is optimised through techniques such as code splitting, virtualisation, bundle optimisation, and rendering efficiency improvements. * Collaborate on API design through a Backend-for-Frontend (BFF) approach, ensuring clean, predictable data contracts. * Embed security-by-design principles into all front … delivering complex, enterprise-grade front-end applications from build through to production. * Strong understanding of front-end architecture, including scalable project structure, reusable component design, and maintainable code patterns. * Advanced TypeScript skills, including typing API responses, shared models, and robust component interfaces. * Experience working with modern state management ...

Staff Software Engineer

Hiring Organisation
Classic Football Company Ltd
Location
Manchester Area, United Kingdom
collaborative Agile environment. You will take ownership of complex Magento and front-end initiatives, influence technical direction, and work closely with Product, Design, and Operations to ensure our platforms remain scalable, secure, and high-performing. Location: Hybrid/Remote flexibility Hours: The role is a full-time position … Responsibilities: Lead the design, development, and maintenance of Magento 2 (PHP) features, modules, and integrations, including REST and GraphQL APIs. Drive front-end development using React (JavaScript/TypeScript), consuming Magento GraphQL endpoints to deliver high-quality customer experiences. Own technical solutions from concept through to production, ensuring quality ...

Senior Applied AI Engineer (.NET)

Hiring Organisation
Adria Solutions
Location
Warrington, Cheshire, North West, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£85,000
Senior Applied AI Engineer (.NET) Were looking for a Senior Applied AI Engineer to design and deliver production-grade AI-powered features within a modern .NET product environment. This is a hands-on engineering role focused on applying AI in real systems not training models. Youll work with commercial … role suits someone who has already successfully integrated AI into production products and can bring proven patterns into a growing team. What Youll Do Design and build AI-powered product features within a C#/.NET ecosystem Integrate commercial AI APIs into production systems with a focus on reliability ...

Senior Software Engineer

Hiring Organisation
SR2 | Socially Responsible Recruitment | Certified B Corporation™
Location
Ipswich, England, United Kingdom
holds up under real world pressure. What you will be doing: Designing and building scalable backend systems in Python, with a strong focus on API design and data handling Owning features end to end, from discovery through to deployment and iteration Contributing to architectural decisions across a microservices … team What they are looking for: Strong Python experience, with a track record of building and maintaining production systems Solid understanding of system design, particularly around APIs and distributed architectures Experience working with AWS and modern deployment practices Engineers who care about code quality, CI/CD, and building ...

Senior Software Engineer

Hiring Organisation
SR2
Location
Ipswich, Suffolk, United Kingdom
Employment Type
Permanent
Salary
£65000 - £70000/annum + benefits
holds up under real world pressure. What you will be doing: * Designing and building scalable backend systems in Python, with a strong focus on API design and data handling * Owning features end to end, from discovery through to deployment and iteration * Contributing to architectural decisions across a microservices … team What they are looking for: * Proven Python experience, with a track record of building and maintaining production systems * Solid understanding of system design, particularly around APIs and distributed architectures * Experience working with AWS and modern deployment practices * Engineers who care about code quality, CI/CD, and building ...

Senior Back End Engineer (Node.js/Typescript)

Hiring Organisation
Harnham - Data & Analytics Recruitment
Location
Nottingham, Nottinghamshire, England, United Kingdom
Employment Type
Full-Time
Salary
£80,000 - £90,000 per annum
large, ambitious commercial environment. THE ROLE: You will take ownership of designing and delivering backend services within a modern MACH-based digital platform (Microservices, API-first, Cloud-Native and Headless). Working closely with product, frontend and platform teams. Key responsibilities include: Designing, developing and maintaining scalable microservices using … practices across the team YOUR SKILLS AND EXPERIENCE: You will bring strong capability in: TypeScript and Node.js development Microservices-based architectures GraphQL and REST API design Working with SQL and NoSQL databases Modern software development practices, including CI/CD, testing and automation THE BENEFITS: You will receive ...

Senior Full Stack Engineer

Hiring Organisation
Humanoid
Location
London Area, United Kingdom
create the world’s leading, commercially scalable, safe, and advanced humanoid robots that seamlessly integrate into daily life and amplify human capacity. Responsibilities Design and implement a centralized cloud-based platform for managing a fleet of humanoid robots, monitoring system health, and visualizing fleet-level KPIs Develop robust backend … Expertise Proficiency in one of Python, Javascript, Golang or Rust Familiarity with React (or similar frameworks) for creating user-friendly web applications. Expertise in API design, data modeling, and distributed architectures Proficiency with CI/CD pipelines, containerization (e.g., Docker, Kubernetes), and workflow automation. Proficiency in infrastructure ...

Full Stack Engineer

Hiring Organisation
Hotspex
Location
London, England, United Kingdom
enterprise-grade emotional brand science into the hands of every marketer → MCP server integrations and agentic tool chains — exposing our Human Motivation Framework as API-accessible AI tools that plug into Claude, Adobe, and enterprise martech stacks → Client-facing interactive products — brand simulators, revenue growth models, and AI-powered … Qualifications Proficient in front-end development: HTML, CSS, and modern JavaScript frameworks (React preferred) Skilled in back-end development: server-side languages, database management, API design Proven full-stack delivery — end-to-end ownership from architecture to deployment Strong experience with Claude Code — show us what ...

Full Stack Developer - .Net React

Hiring Organisation
Youngs Employment Services
Location
Hammersmith and Fulham, Greater London, Ravenscourt Park, United Kingdom
Employment Type
Permanent
Salary
£50000 - £75000/annum Bonus + Bens
deployment, Azure Service Bus, Blob Storage SQL Server — T-SQL, EF Core migrations, query optimisation Azure DevOps — Repos, Boards, Pipelines, Test Plans REST API design and OpenAPI/Swagger documentation This is an exciting time to be joining our client with salary will be based on experience ...

Principal Engineer

Hiring Organisation
Arrive
Location
City Of London, England, United Kingdom
technical initiatives across multiple teams Experience designing scalable, high-performance systems Experience working with legacy or monolithic systems and modernising them Strong understanding of API design and distributed systems Knowledge of modern engineering practices, including CI/CD and DevSecOps Understanding of secure development practices such as OWASP ...

Software Developer

Hiring Organisation
EBITS LLP
Location
Henley-on-Thames, Oxfordshire, England, United Kingdom
Employment Type
Full-Time
Salary
£35,000 - £40,000 per annum
Level: 3-6 years of experience in software development Stack: C#, .Net Core, ASP.net Microsoft SQL, Entity Framework JavaScript, CSS, JSON, XML, etc API Design & Best Practice (REST, SOAP) Excellent understanding of Object-Oriented software design Agile/SCRUM Azure DevOps Server Follow best practices to build ...

Software Developer

Hiring Organisation
EBITS LLP
Location
Henley-on-Thames, Oxfordshire, UK
Experience: Mid-Level: 3-6 years of experience in software development Stack: C#, .Net Core, Microsoft SQL, Entity Framework JavaScript, CSS, JSON, XML, etc API Design & Best Practice (REST, SOAP) Excellent understanding of Object-Oriented software design Agile/SCRUM Azure DevOps Server Follow best practices ...

Senior Full Stack Engineer

Hiring Organisation
Access Computer Consulting
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
£400 - £440/day
This role is designed for engineers who have built and operated large-scale systems end-to-end, not those with superficial exposure or purely design-focused experience. Candidates must have strong experience of Java Full Stack, React, Kubernetes & Docker. Experience in building responsive, component based user interfaces using modern … front end frameworks. Hands on expertise in API design and development (REST/JSON), including versioning and backward compatibility. Experience with UI testing, component testing, and front end build tooling. Experience in CI/CD pipelines, GitOps workflows, A/B testing strategies and also automating the workflows ...

Chief Technology Officer (CTO) at Telehealth Platform

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
such as AWS, Google Cloud, or Azure and DevOps practices Knowledge of healthcare data privacy standards including GDPR and HIPAA compliance Skilled in architecture design for scalable, secure, and reliable systems Experience managing real‐time communication technologies like WebRTC and video consultation infrastructure Platform & Development Proficiency with modern … frameworks (React, Node.js, Next.js) and mobile development platforms (iOS, Android, React Native, Flutter) Familiarity with API design, microservices, and payment integration systems (e.g., Stripe) Leadership & Strategic Qualities 10+ years experience in software engineering with at least 5 years in senior technical leadership roles Demonstrated ability to build ...

AI Product Engineer

Hiring Organisation
Adria Solutions
Location
Warrington, Cheshire, North West, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£85,000
This is a hands-on engineering role focused on integrating commercial AI APIs into a .NET ecosystem not building models from scratch. You will design, develop, and deliver production-ready features that rely on services such as Anthropic Claude, AWS Bedrock, and OpenAI. AI-assisted development will … team where AI was embedded into real products and can bring proven patterns, practices, and standards into a new environment. What Youll Do Design and implement AI-powered product features within a C#/.NET stack Integrate commercial AI APIs into production systems with reliability and scalability in mind ...

Senior Full Stack Software Engineer

Hiring Organisation
Bolt Technical Limited
Location
Milton Keynes, Buckinghamshire, South East, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£80,000
develop a LAMP-based full-stack platform Audit, refactor, and improve legacy code without full rewrites Introduce modern front-end frameworks (React, Vue, Angular) Design and maintain APIs (REST/GraphQL) Improve performance, security, and scalability Contribute to DevOps, CI/CD, and cloud infrastructure Mentor junior developers … best practices What Theyre Looking For Senior full-stack experience in a LAMP environment Strong PHP and MySQL skills Experience with modern JavaScript frameworks API design experience Comfortable in a hands-on, pragmatic, small-team environment Strong communication and problem-solving skills Package & Benefits ...

Server-Side Java/AWS engineer

Hiring Organisation
Harvey Nash
Location
London, United Kingdom
Employment Type
Permanent
Salary
£80,000
APIs, Graph QL, Python (nice to have), CI/CD What we're looking for: Strong backend engineering experience (Java + AWS) Microservices and API design expertise Exposure to financial services or regulatory environments (preferred) High visibility role, strong engineering culture, and opportunity to work on large-scale ...

Pricing & Market Data (Migration Specialist)

Hiring Organisation
HCLTech
Location
London Area, United Kingdom
Trading (Oil, Gas, or Power). Technology Stack : Deep Mastery: Gresham Asset Control (legacy) and Prime EDM. Architecture : Cloud-native migrations (AWS/Azure), API design, and SQL/NoSQL performance tuning. Scripting : Python (preferred) or Java for custom business logic and automation. Pricing Logic : Strong understanding ...

Integration Engineer (must be eligible for SC clearance)

Hiring Organisation
Akkodis
Location
Stevenage, Hertfordshire, England, United Kingdom
Employment Type
Contractor
Contract Rate
£550 per day
looking for an experienced Integration Engineer to join our software & integration team. In this role, you'll be responsible for the discovery, design, and documentation of integrations across our cloud platforms, enabling seamless data flow between systems. You will work closely with software engineers, business analysts, cloud architects … Stevenage head office 3 days a week on average. You must either hold or be eligible for SC clearance. Responsibilities Design and develop integrations for implementation within a low-code/no-code environment Collaborate with business analysts and solution architects to translate business requirements into integration solutions Document ...

Integration Engineer (must be eligible for SC clearance)

Hiring Organisation
Akkodis
Location
Stevenage, Hertfordshire, United Kingdom
Employment Type
Contract
Contract Rate
£550/day
looking for an experienced Integration Engineer to join our software & integration team. In this role, you'll be responsible for the discovery, design, and documentation of integrations across our cloud platforms, enabling seamless data flow between systems. You will work closely with software engineers, business analysts, cloud architects … Stevenage head office 3 days a week on average. You must either hold or be eligible for SC clearance. Responsibilities Design and develop integrations for implementation within a low-code/no-code environment Collaborate with business analysts and solution architects to translate business requirements into integration solutions Document ...

Software Engineering Team Lead - eDV cleared

Hiring Organisation
Forward Role
Location
Cheltenham, Gloucestershire, South West, United Kingdom
Employment Type
Permanent
customer-facing software projects. Experience with one or more of the following: Full-stack web development Software as a Service (SaaS) Mobile application development API design and development Cloud platforms (AWS, Azure, GCP) Front-end development and user experience (UX) Clearance required - Due to the nature … client's work, you are required to hold an eDV level security clearance. As an industry leading, nationwide Marketing, Digital, Analytics, IT and Design recruitment agency, we are continually receiving new assignments to work on, so keep a close eye on our website, Facebook, LinkedIn and Twitter pages ...