51 to 75 of 110 API Design Jobs in England

Lead Software Engineer (MongoDB / Node.js / JavaScript)

Hiring Organisation
Adria Solutions
Location
Manchester, North West, United Kingdom
Employment Type
Permanent
Salary
£75,000
support junior and senior engineers Conduct code reviews and uphold engineering best practices Backend Engineering Build and maintain scalable backend services and RESTful APIs Design and optimise MongoDB database solutions Improve and maintain existing backend infrastructure Troubleshoot production issues and implement robust solutions Collaboration & Delivery Work closely with cross … have experience with: MongoDB (data modelling, indexing, aggregation, performance tuning) Node.js and the wider JavaScript/TypeScript ecosystem Express.js and/or Fastify RESTful API design AWS or similar cloud platforms Microservices architecture Testing frameworks (Vitest, Jest, Mocha, etc.) CI/CD pipelines & DevOps practices GitHub workflows Observability ...

Senior Full Stack Engineer (Team Lead)

Hiring Organisation
Futuria
Location
City of London, London, United Kingdom
development tools across your team Foster culture of learning, experimentation, and knowledge sharing Work with Head of Engineering on architecture, partner with product and design teams About You You're a strong senior engineer ready to lead a team but who still loves writing code. You have solid technical … Strong expertise in Python backend development with async patterns Production experience with modern frontend frameworks (React, TypeScript) Solid understanding of distributed systems architecture and API design Experience with container orchestration, CI/CD, and cloud platforms Experience with NoSQL databases and data modelling Daily user of AI-assisted ...

Senior .Net Developer

Hiring Organisation
ISR RECRUITMENT LIMITED
Location
South West, United Kingdom
Employment Type
Permanent
Salary
£55000 - £65000/annum (plus excellent company benefits)
locally) c£55,000 to £65,000 per year Pension, Bonuses, Training and Development, etc. Skills and Experience: Expertise in C#, .NET Core, REST API design and backend architecture. Strong SQL skills with the ability to create performant, reliable database logic. Strong understanding of ORM patterns, data mapping … product and offshore teams. Experience integrating services into CI/CD pipelines (GitHub Actions or Azure DevOps). Familiarity with clean architecture, domain-driven design, or similar engineering patterns. Understanding of containerisation workflows (Docker) and AKS operational concepts. Mentoring experience or leadership within engineering teams. Exposure to API ...

Lead Developer

Hiring Organisation
Oscar Associates (UK) Limited
Location
Warrington, Cheshire, North West, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£80,000
manual test strategies Documenting architectural decisions (ADRs) and maintaining clear technical communication Tech Stack & Experience Core technologies: .NET 10/ASP.NET Core Web API Entity Framework Core with Azure SQL .NET MAUI (offline-first mobile design) Microsoft Azure (App Services, Azure SQL, Blob Storage, Key Vault, Application Insights … years working within fast-paced, 'fail-fast' delivery environments At least 2 years in a leadership position Strong expertise in modern .NET and API design Proven Angular experience (v15+) Hands-on Azure architecture and deployment experience Experience implementing Infrastructure as Code (Bicep preferred) Experience integrating Azure Entra ...

Technical Team Lead - eDV Cleared

Hiring Organisation
Forward Role
Location
Cheltenham, Gloucestershire, South West, United Kingdom
Employment Type
Permanent
identify risks, plan deliveries, and support resource allocation Core Focus: Architecture & Integration Cross-domain strategy and secure system integration Java/Spring Boot microservices design and governance Senior technical stakeholder liaison across customer and internal teams What You Bring: Proven experience leading teams in Agile, 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 of the clients' work ...

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 ...

Back End Developer

Hiring Organisation
Prism Digital
Location
City of London, London, United Kingdom
backend engineer who enjoys designing systems properly and taking ownership of production infrastructure. You will likely bring experience with: • PostgreSQL/SQL database design, schema architecture, indexing, migrations • NoSQL databases such as Firestore • Database migrations from NoSQL to relational systems • REST API design for high concurrency • Stripe … product aiming to redefine how music is created online. You will: • Lead the migration from Firestore to PostgreSQL • Build the payments backbone powering subscriptions • Design scalable media upload and streaming systems • Build backend systems for real-time music collaboration • Improve reliability, observability, and deployment pipelines The team works from ...

Junior Back-end Engineer

Hiring Organisation
ivee
Location
City of London, London, United Kingdom
maintain server-side logic using modern backend frameworks (e.g. Node.js, Python, Go) Work with APIs — designing, integrating, and maintaining RESTful endpoints Support database design and optimisation (e.g. PostgreSQL, MongoDB) Collaborate with front-end and product teams to deliver full-stack features Write clean, testable, and maintainable code Help improve ...

Software Developer

Hiring Organisation
Quantock Talent Limited
Location
Reading, Berkshire, England, United Kingdom
Employment Type
Full-Time
Salary
£40,000 per annum
years of experience in software development with the Microsoft stack • 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 ...

Full Stack Web Developer

Hiring Organisation
LM RECRUITMENT SOLUTIONS LTD
Location
Stroud, Gloucestershire, South West, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£55,000
full-stack technologies. Develop new features and functionality for both front-end and back-end components in following best practices. Implement and maintain robust API integrations with internal and third-party systems. Assist in monitoring, troubleshooting, and resolving production issues to maintain system reliability and data integrity. Participate … reviews, testing, and documentation to maintain high standards of code quality. Required Skills & Experience Strong full-stack development experience with Laravel/PHP for API development and front-end frameworks such as Vue.js (or similar). Familiarity with Node.js for working on an existing LoopBack application. Experience with ...

Full Stack Engineer

Hiring Organisation
Humanoid
Location
City of London, London, 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 ...

APEX PLSQL Developer

Hiring Organisation
Acumen Bay Consultancy
Location
London, United Kingdom
Employment Type
Permanent
Salary
GBP 95,000 Annual
Should be able to write unit test cases using any of the frameworks and should be completely automated. Should have strong exposure in REST API design principles. Should be able to develop reusable components using proper design patterns and implement the right solutions. Should be able ...

Senior Backend Engineer

Hiring Organisation
Searchability®
Location
City of London, London, United Kingdom
Experience working on the engineering team in a start-up, scale-up or product-driven company Strong understanding and experience with building and consuming API-driven solutions. Experience with database technologies, cloud platforms (e.g., AWS, Azure, GCP), and API design principles. A minimum of a Bachelor ...

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 ...

Back End Developer

Hiring Organisation
Albert Bow
Location
City of London, London, United Kingdom
+ mobile applications Building and maintaining high‐performance APIs and distributed microservices Solving problems around scalability, reliability, security, and automation Working with modern API protocols including GraphQL and gRPC Enhancing the platform that connects both traditional and on‐chain financial services Must‐have experience: Strong backend engineering background with …/or Golang Solid understanding of microservices, event‐driven systems & distributed architecture Strong knowledge of PostgreSQL and/or Redis Understanding of web semantics, API design & backend web standards Proficiency with Git and version control workflows Experience with CI/CD, build automation and modern engineering pipelines Excellent ...

Salesforce Software Engineer York,UK

Hiring Organisation
Mason Frank
Location
York, North Yorkshire, England, United Kingdom
Employment Type
Full-Time
Salary
£45,000 - £55,000 per annum
architecture discussions, code reviews, and problem-solving Requirements: 2-3 years software development experience, strong OOP (Java/C#) Proficient in JavaScript, RESTful API design, and full-stack development Salesforce experience is a bonus but not required Mentorship or industry-specific experience is a plus Why Apply ...

Software Engineer

Hiring Organisation
Mason Frank
Location
York, North Yorkshire, England, United Kingdom
Employment Type
Full-Time
Salary
£45,000 - £55,000 per annum
architecture discussions, code reviews, and problem-solving Requirements: 2-3 years software development experience, strong OOP (Java/C#) Proficient in JavaScript, RESTful API design, and full-stack development Salesforce experience is a bonus but not required Mentorship or industry-specific experience is a plus Why Apply ...

PHP Developer – Sunderland – Hybrid (2 days from office)– up to £50K DOE

Hiring Organisation
Reed
Location
Sunderland, Tyne and Wear, England, United Kingdom
Employment Type
Full-Time
Salary
£40,000 - £50,000 per annum, Inc benefits
daily with PHP, Symfony, PostgreSQL, and React, and contribute to infrastructure and deployment processes alongside experienced engineers. Skills: Solid experience with backend development and API design using PHP Experience with relational databases - PostgreSQL End-to-end feature ownership across the stack Familiarity with agile development Desirable Symfony experience ...

Mid-Senior Ruby on Rails Engineer (B2B SaaS | Hybrid | UK)

Hiring Organisation
Transreport
Location
City of London, London, United Kingdom
architecture Extensive experience with PostgreSQL, including performance tuning and complex queries. Experience with background job processing using Sidekiq and Redis. Solid understanding of RESTful API design, JSON serialization, and authentication (e.g., JWT, SSO). Hands-on experience with AWS services and containerised deployments (Docker). Experience troubleshooting ...

AI Platform Engineer

Hiring Organisation
The Portfolio Group
Location
London, Castle Baynard, United Kingdom
Employment Type
Permanent
owning the cloud-native platform that underpins conversational AI and generative AI products at scale. Sitting at the core of AI delivery, you will design, build, and operate the runtime, infrastructure, and operational layers supporting RAG pipelines, LLM orchestration, vector search, and evaluation workflows across AWS and Databricks. Working … platform powering conversational assistants and generative AI products. Build, operate, and optimise RAG and LLM-backed services, improving latency, reliability, and cost. Design and run cloud-native AI services across AWS and Databricks, including ingestion and embedding pipelines. Scale and operate vector search infrastructure (Weaviate, OpenSearch, Algolia, AWS Bedrock ...

Product Engineer

Hiring Organisation
Affinity Labs
Location
City of London, London, United Kingdom
full-stack product delivery, from infrastructure and AI integrations through to React/React Native interfaces, collaborating closely with founders, creators, product, and design to turn lean specs into scalable, user-loved software. We’re looking for a strong generalist with backend depth and real mobile experience. Responsibilities Implement … mobile + web frontend → APIs → data models → integrations) while maintaining quality and velocity. Build React Native mobile apps and shared component systems across products. Design and ship scalable backend services (APIs, integrations, AI workflows). Run tight build → test → iterate → ship loops; provide realistic estimates and surface blockers early. ...

Core Software Engineer

Hiring Organisation
Aries Global
Location
City of London, London, United Kingdom
seasoned technical leaders. What matters is how you think, build, and ship. You'll take end-to-end ownership of features from architecture design to measurable impact — shipping code that directly moves revenue, retention, or product velocity. You'll design clean abstractions in ambiguous environments, evolve systems into … . We care about outcomes, not activity. What We're Looking For You've built and shipped real systems. You understand data modelling, API design, system trade-offs, testing, and reliability. You know how to move fast without creating chaos. You're strong in at least one modern ...

Senior Java Engineer – Reactive

Hiring Organisation
Fynity
Location
City of London, London, United Kingdom
senior individual-contributor role within a high-performing engineering team, building asynchronous, message-driven systems designed for scale, resilience, and near-zero downtime. Design and implement high-throughput, low-latency systems processing millions of real-time payment events Build event-driven architectures using modern Java and reactive frameworks Work … extensively with non-blocking I/O, asynchronous flows, back-pressure, and concurrency Contribute to system and API design, focusing on scalability, fault tolerance, and observability Collaborate closely with architects, engineers, and client teams across Europe Operate in Agile environments (Scrum/Kanban) with a strong engineering culture ...

Lead Full Stack Developer

Hiring Organisation
G.R.E. Recruitment Limited
Location
City of London, London, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£95,000
Start Up - Smart Living Platform Fully Remote - Must be UK based £85,000 - £95,000 + Stock Options (DOE) Essential Exp: Laravel, Flutter, SaaS, API Design, MySQL/PostgreSQL/MariaDB G.R.E. Recruitment is DELIGHTED and EXCITED to partner with an exciting UK based PropTech Start-Up company … defining technical standards, scalability strategy, and product direction across the technical ecosystem. In this role you will: Own and evolve a Laravel-based REST API Develop and maintain a Flutter mobile application (iOS & Android) Design and implement secure, multi-tenant architecture Establish clean coding standards and engineering best ...

AI Engineer - OpenAI/Python - Birmingham

Hiring Organisation
Harvey Nash
Location
Birmingham, West Midlands, England, United Kingdom
Employment Type
Full-Time
Salary
£70,000 - £75,000 per annum
working - 3 days per week onsite Salary up to £70,000 - 75,000 A leading Birmingham-based client is seeking an AI Engineer to design, build, and deploy AI applications using Python frameworks and LLM APIs. The position focuses on developing scalable, secure AI services in Azure's public … cloud and involves hands-on work throughout the development lifecycle, including API design, data access, AI integration, and cloud deployment. Key skills and responsibilities, Design, develop, and maintain AI-driven applications and services utilizing Python. Build and manage RESTful APIs with FastAPI. Integrate and oversee Large Language ...