26 to 40 of 40 API Design Jobs in the North of England

Senior Backend Developer (.NET | AI-First SaaS Platform)

Hiring Organisation
Keepnet
Location
Chester, Cheshire, UK
Employment Type
Full-time
that power these systems, working in a multinational, AI-first engineering team where quality, ownership, and long-term thinking matter. What You'll Do Design, build, and maintain scalable backend services for Keepnet's Human Risk Management platform. Build clean, modular APIs that integrate internal services and third-party … enable automation, reporting, and security workflows. Develop testable, maintainable codebases using principles such as Clean Architecture, DDD, and TDD. Own the full development lifecycle: design, implementation, CI/CD (Azure), and post-release monitoring. Work on distributed and asynchronous systems using message queues, background workers, and event-driven workflows. ...

Senior Backend Developer (.NET | AI-First SaaS Platform)

Hiring Organisation
Keepnet
Location
Newcastle upon Tyne, UK
Employment Type
Full-time
that power these systems, working in a multinational, AI-first engineering team where quality, ownership, and long-term thinking matter. What You'll Do Design, build, and maintain scalable backend services for Keepnet's Human Risk Management platform. Build clean, modular APIs that integrate internal services and third-party … enable automation, reporting, and security workflows. Develop testable, maintainable codebases using principles such as Clean Architecture, DDD, and TDD. Own the full development lifecycle: design, implementation, CI/CD (Azure), and post-release monitoring. Work on distributed and asynchronous systems using message queues, background workers, and event-driven workflows. ...

React Native developer

Hiring Organisation
Experis
Location
Knutsford, Cheshire, United Kingdom
Employment Type
Contract
Contract Rate
£430/day
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 and development through testing, deployment, and ongoing support, with a strong emphasis on code quality, security, and automation. Key Responsibilities Design, develop … 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 RESTful APIs , including documentation using OpenAPI Specification (OAS)/YAML Apply Test-Driven Development (TDD) principles across frontend and backend components Write ...

Mid-Level Back End Developer

Hiring Organisation
The Genius Group (TGG)
Location
Altrincham, England, United Kingdom
TypeScript Familiarity and experience with PostgreSQL, Sequelize, Jest, Docker, PM2 and Redis patterns. Experience writing tests with Jest or similar frameworks Understanding of RESTful API design principles Good problem-solving skills and attention to detail Key communication skills What We Offer: Competitive salary (depending on experience) Opportunities ...

Business Analyst

Hiring Organisation
Horwich Farrelly
Location
Salford, Lancashire, England, United Kingdom
Employment Type
Full-Time
Salary
Competitive salary
with business objectives. Map as-is and to-be processes, identifying automation opportunities and efficiency gains. Collaborate with developers and testers on data flows, API contracts, and test coverage. Support backlog refinement and prioritisation, ensuring stories are ready for sprint planning. Contribute to UX validation and user journey mapping … Azure AI/OpenAI. Experience with insurance or legal processes. Familiarity with Azure Dev Ops for capturing epics, features and user stories. Understanding of API design and basic technical concepts. About the team Robert Buxton, Product Owner, shares his perspective: "This BA role is all about bridging ...

Salesforce & React Native Developer

Hiring Organisation
Atrium Workforce Solutions Ltd
Location
Manchester, Lancashire, England, United Kingdom
Employment Type
Contractor
Contract Rate
£500 - £550 per day
Inside IR35) Sector: Banking Key Skills & Experience Salesforce +5 years experience AND OR React Native (Web) +5 years Java +5 years TDD, BDD RESTful API design & build OAS/YAML Unit Testing GitLab CI/CD Pipelines Agile practitioner, SonarQube, Veracode, Jira, Confluence Banking/Financial services background ...

C# Developer

Hiring Organisation
VIQU IT
Location
Manchester, United Kingdom
Employment Type
Contract
Contract Rate
£300 - £350/day Outside IR35
Developer: Must have a strong background in C#/.NET development. Experience of PostgresSQL or other SQL databases. CI/CD experience. Experience in API design and building system integrations. Microsoft Dynamics integration (highly desirable). Python and/or JavaScript experience (desirable). Excellent communication skills ...

AI Systems Architect

Hiring Organisation
Adria Solutions
Location
Winsford, Cheshire, North West, United Kingdom
Employment Type
Permanent
term progression for the right individual. The Role This position sits at the intersection of systems architecture, backend engineering, and platform reliability. You will design and build the infrastructure that connects distributed edge environments with backend services, ensuring systems are scalable, observable, and robust in production. The role … problems rather than operating purely at a conceptual level. Key Responsibilities Own and evolve end-to-end system architecture across edge and backend environments Design and build backend services and APIs using Go and Python Develop scalable data ingestion, messaging, and telemetry pipelines Support containerised deployments and system reliability ...

Salesforce Engineer

Hiring Organisation
Experis
Location
Knutsford, Cheshire, United Kingdom
Employment Type
Contract
delivery-focused technology team. The role requires strong hands-on development capability across Salesforce and Java, with a clear emphasis on modern engineering practices, API design, and test-driven development. This position is suited to a senior engineer who is comfortable working within CI/CD-driven environments … contributing to high-quality, scalable enterprise solutions. Key Responsibilities Design, develop, and maintain Salesforce-based solutions using Java and modern engineering practices Build and consume RESTful APIs, ensuring robust and secure integrations Apply Test-Driven Development (TDD) and Behaviour-Driven Development (BDD) approaches where applicable Produce and maintain OpenAPI ...

Senior iOS Engineer / iOS Technical Lead (Hands-on)

Hiring Organisation
Circle Group
Location
Manchester, North West, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£60,000
stability, correctness and long-term maintainability really matter. Day to day, you will: Own the architecture and technical direction of iOS apps and SDKs Design and build complex features using Swift, with some Objective-C and C++ Tackle challenges around networking, performance, stability and edge cases Stay ahead … Apple platform changes, shaping how the team responds Support SDK integrations and help resolve tricky production issues Run design and code reviews, and help raise engineering standards Make pragmatic use of modern tooling, including AI-assisted development tools, to improve quality and reduce busywork Who this role suits This ...

Senior Software Engineer - Backend

Hiring Organisation
Fruition Group
Location
Leeds, West Yorkshire, Yorkshire, United Kingdom
Employment Type
Permanent
Salary
£70,000
large-scale software platform. Working across multiple teams to ensure alignment and scalability throughout the business. Set technical direction and contribute to key design decisions across teams. Lead by example, writing high-quality, maintainable code in Node.js and TypeScript. Design and optimise CI/CD pipelines, improving automation … robust services. Mentor and coach engineers, helping to raise the overall bar for backend development. Drive best practices in platform engineering, cloud infrastructure, and API design. Key requirements: 5+ years' experience in backend or platform engineering roles, with recent experience at senior Level. Deep hands-on expertise with Node.js ...

Senior Backend Engineer

Hiring Organisation
Fruition Group
Location
Leeds, West Yorkshire, Yorkshire, United Kingdom
Employment Type
Permanent
Salary
£70,000
large-scale software platform. Working across multiple teams to ensure alignment and scalability throughout the business. Set technical direction and contribute to key design decisions across teams. Lead by example, writing high-quality, maintainable code in Node.js and TypeScript. Design and optimise CI/CD pipelines, improving automation … robust services. Mentor and coach engineers, helping to raise the overall bar for backend development. Drive best practices in platform engineering, cloud infrastructure, and API design. Key requirements: 5+ years' experience in backend or platform engineering roles, with recent experience at senior Level. Deep hands-on expertise with Node.js ...

Software Engineer III - Backend

Hiring Organisation
Fruition Group
Location
Leeds, West Yorkshire, Yorkshire, United Kingdom
Employment Type
Permanent
Salary
£70,000
large-scale software platform. Working across multiple teams to ensure alignment and scalability throughout the business. Set technical direction and contribute to key design decisions across teams. Lead by example, writing high-quality, maintainable code in Node.js and TypeScript. Design and optimise CI/CD pipelines, improving automation … robust services. Mentor and coach engineers, helping to raise the overall bar for backend development. Drive best practices in platform engineering, cloud infrastructure, and API design. Key requirements: 5+ years' experience in backend or platform engineering roles, with recent experience at senior Level. Deep hands-on expertise with Node.js ...

Lead Fullstack Engineer

Hiring Organisation
Circle Group
Location
Manchester, North West, United Kingdom
Employment Type
Permanent, Work From Home
next generation of a major digital platform. What you'll do: Lead software projects from concept through to delivery, taking ownership of key initiatives. Design scalable, high-performance architectures that keep critical systems running smoothly. Mentor and support developers, helping the team grow technically and professionally. Collaborate with stakeholders … preferred ). Solid understanding of back-end services, data flows, and system integration. Nice to have: Familiarity with cloud platforms, complex data pipelines, or API design. Why join? Competitive salary and benefits Flexible hours and hybrid working Collaborative culture where your ideas make a real impact ...

Lead Fullstack Engineer

Hiring Organisation
Circle Group
Location
Leeds, West Yorkshire, Yorkshire, United Kingdom
Employment Type
Permanent, Work From Home
next generation of a major digital platform. What you'll do: Lead software projects from concept through to delivery, taking ownership of key initiatives. Design scalable, high-performance architectures that keep critical systems running smoothly. Mentor and support developers, helping the team grow technically and professionally. Collaborate with stakeholders … preferred ). Solid understanding of back-end services, data flows, and system integration. Nice to have: Familiarity with cloud platforms, complex data pipelines, or API design. Why join? Competitive salary and benefits Flexible hours and hybrid working Collaborative culture where your ideas make a real impact ...