76 to 100 of 104 API Design Jobs in the UK

Senior Developer

Hiring Organisation
Addition
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£70,000 - £90,000 per annum
improving APIs that support critical platform functionality Investigating production issues and tracing problems across distributed systems Working with product and engineering teams to design scalable solutions Improving reliability, observability and performance across existing services Reviewing code, sharing knowledge and helping raise engineering standards across the team Tackling real-world … APIs used by customers or internal teams Other Skills Needed: Solid backend engineering experience in C#, Java, or Go, with a strong grasp of API design and architecture. Hands-on experience managing and debugging production systems across cloud and self-managed infrastructure. Proven ability to navigate complex third ...

Ruby Developer

Hiring Organisation
Proactive Appointments
Location
London, United Kingdom
Employment Type
Permanent
Salary
GBP 70,000 - 80,000 Annual
develop new features, enhance existing systems, and ensure our platform remains stable and efficient. Your deep understanding of Rails architecture, PostgreSQL optimisation, and API design will be essential as you contribute to ongoing development projects. If you enjoy collaborating in Agile/Scrum environments, value clean code ...

Ruby on Rails Backend Engineer

Hiring Organisation
Rise Technical Recruitment
Location
Fulham, London, United Kingdom
Employment Type
Permanent
Salary
£60000 - £80000/annum Private Healthcare + Holiday + Pensi
evolution of core Ruby on Rails operational platforms. Optimise PostgreSQL performance and Sidekiq background job efficiency. Manage secure third-party integrations and RESTful API design. Partner with Platform teams on AWS and CI/CD reliability. The Person: Deep experience with Ruby on Rails and OOP. Expert in PostgreSQL ...

AI Solutions Architect

Hiring Organisation
Infosec
Location
Wales, United Kingdom
Employment Type
Permanent
Salary
£90,000
Autogen, Google ADK). Architecting RAG pipelines, vector database integrations, and prompt management strategies. Building guardrail frameworks to prevent hallucinations, injection and bias. Designing API-first and event-driven architectures. Influencing enterprise roadmaps, governance forums and technical standards. Partnering with senior engineers, value streams, and product stakeholders. What … bring Expertise in Azure AI, AWS Bedrock or Google Vertex. Strong experience with LLM evaluation/MES frameworks. Deep knowledge of integration security, API design and cloud-native patterns. Experience delivering solutions in regulated environments (desirable). Naturally proactive, consultative and comfortable influencing at senior levels. ...

Senior Product Engineer (Backend-Leaning Fullstack)

Hiring Organisation
Whering
Location
United Kingdom
Employment Type
Permanent
Salary
GBP 70,000 - 80,000 Annual
Next.js/similar) when the work calls for it. Angular & Vue experience is fine! You build for mobile without building the mobile app. You design APIs and services that serve mobile clients beautifully, accounting for offline, network, battery, and app-release realities and are able to partner closely with … mobile engineers. You own features end-to-end. From API design and data modelling to web frontend implementation, deployment, and post-launch iteration. You're a proactive collaborator. You ask the right questions, propose solutions, and work effectively with teammates whose depth complements yours, including mobile, design ...

Senior Software Developer C and Linux

Hiring Organisation
System Recruitment
Location
Lymington, Hampshire, South East, United Kingdom
Employment Type
Contract
Contract Rate
£250 - £350 per day
/Linux Software Developer for an initial 6 month contract Key Skills: Software Developer, Software Engineer, C, Linux, Autotools, LDAP, Active Directory, Terraform, OpenTofu, API Location: Hybrid but must be able to reach the office near Lymington - SO41 9AZ Rate: Negotiable Essential Skills Experience developing application code … equitant system initialisation frameworks and how they operate at a low level Understanding of secure configuration delivery and deployment auditability of newly provisioned systems API Design & Implementation (maybe): Experience/Familiarity with: Working with OpenAPI (Swagger) specifications to define service interfaces Implementing APIs in C or similarly ...

Technical Product Manager

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
working closely with the Product Lead to deliver against the broader product strategy. You will play a key role in shaping product capabilities, technical design decisions, and delivery outcomes, ensuring the platform meets the needs of traders and quants operating in fast‐paced power markets. Key Accountabilities Define … priorities. Collaborate on cloud architecture and SaaS delivery (Azure‐based). Ensure strong performance, scalability, and reliability across the platform. Provide input into API design, data models, and system architecture. Build a culture of excellence and collaboration as part of a team. Actively participate in the Scrum team ...

Principal React Engineer JBLE1 NI

Hiring Organisation
Ocho
Location
Belfast, UK
frontend architecture and standards across the organisation Drive adoption of React and TypeScript best practice across multiple teams Build and scale component libraries and design systems Partner with Product and UX to deliver clean, intuitive interfaces Mentor engineers and contribute to the overall capability of the team Own performance … accessibility, and long-term maintainability of the frontend Work closely with backend teams on API design and integration Champion modern tooling, testing practices, and CI/CD Contribute to the technical roadmap and broader engineering strategy What You'll Bring Essential Strong commercial experience with React and TypeScript ...

Solution Architect: 3 Month Contract: Manchester/Hybrid

Hiring Organisation
Adecco
Location
Manchester, United Kingdom
Employment Type
Contract
contract Solution Architect for a 3 month project (Outside IR35.) You will work closely with senior stakeholders and the wider team to provide architecture design and the integration approach between front end and backend systems. You will provide technical leadership and guidance throughout the project lifecycle, ensuring solutions … solutions. Strong background in front and backend technologies for system integration. Strong understanding of cloud platforms (AWS, Azure, Google Cloud) Experience with microservices architecture, API design, and integration patterns. Experience with DevOps practices and tools. Please apply now to be considered for this role. ...

Technical Product Manager

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
your product roadmap. Guide engineering outcomes. You’ll operate as a peer to our tech leads, articulating clear problem statements and UX wireframes or API scaffolding where appropriate. You’ll help the team navigate technical trade-offs without compromising on quality. Elevate the developer experience. You’ll obsess about … building end-to-end experiences that delight developers. Your goal is to design tools that are so intuitive and powerful they turn developers into advocates. Harness data and insights to fuel innovation. You’ll define and analyse product metrics, and feed learnings back into the development process. ...

Backend Engineer (Python)

Hiring Organisation
Skin + Me
Location
London, United Kingdom
Employment Type
Permanent
Salary
GBP Annual
. A non-trivial piece of work you can walk us through and explain well. Good fundamentals: sound data modelling (SQLAlchemy/Alembic), sensible API design, and an instinct for testing. Care where it counts: you treat correctness as a feature, because this code generates real prescriptions … family. How we hire We keep it short and respect your time: Intro call with our engineers (25-30 mins), including a short system-design chat. A conversation with our Director of Software Engineering (30 mins). A practical take-home task, in your own time. Onsite ...

AI Engineer - Enterprise Product AI

Hiring Organisation
Infosec
Location
Bracknell, Berkshire, South East, United Kingdom
Employment Type
Permanent
production AI/ML feature development Understanding of anomaly detection or predictive analytics Proficiency in Python and TypeScript/JavaScript Experience with REST API design and MCP integration patterns Knowledge of MLOps practices Understanding of graph-based dependency or impact analysis (desirable) Experience with AI features in compliance ...

Applications Technical Lead - Newcastle

Hiring Organisation
Morgan Philips Specialist Recruitment
Location
Tyne and Wear, England, United Kingdom
Employment Type
Full-Time
Salary
£80,000 - £90,000 per annum
skilled developers. Essential skills & experience Strong technical understanding of business platforms Strong knowledge of .NET/SQL & Oracle Solid experience with enterprise integration patterns, API design, asynchronous messaging and data synchronisation Proven experience providing technical leadership across onshore and offshore teams, including line management responsibility Track record … live service Strong ability to review designs, identify risks and ensure solutions meet clear quality standards Good understanding of DevOps, CI/CD, secure design and modern delivery practices Experience working in blended delivery environments including permanent teams, contractors and System Integrators Core responsibilities Define and maintain engineering standards ...

Principal Data Architect

Hiring Organisation
Experis
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
£700 - £800 per day
Data platforms - Fabric, Snowflake, CosmoDB, DataBricks, MongoDB, RDBMS Data replication/CDC - Qlik Replicate, Oracle Golden Gate Data modeling - ERStudio Message-oriented data movement API design and access Data Analytics and AL/ML - AzureML Data virtualization Streaming data Data integration and ETL/ELT Tools - Matillion, Alteryx … NoSQL data stores, methods, and approaches (star and snowflake, dimensional modelling and third normal form) Experience with data security and data access controls and design Deep understanding of SoX, GDPR and Regulatory/CNI control environments In-depth experience in providing resolution to an extensive range of complicated data ...

Senior Software Engineer

Hiring Organisation
Platform Recruitment Limited
Location
City of London, London, United Kingdom
Employment Type
Permanent
heavily backend-biased position but given the size of the team you will be working across the stack when needed Build scalable, performant systems Design and deliver end-to-end features with direct impact on customer value Work with product and ML teams to help translate abstract and complex … software function About you: Strong ability across scalable and performant systems You have a product mindset Statically typed language expertise Experience with API design Low ego and love of engineering Full details are available. Please don't hesitate to get in touch for more information. ...

Head of Engineering

Hiring Organisation
Jobleads-UK
Location
Manchester, England, United Kingdom
calibre team of Software Developers and DevSecOps engineers working on a microservice architecture running on Kubernetes in AWS. It's built following strict functional design principles, TDD and CI/CD pipelines to automatically deploy to production. You’ll combine people leadership with technical evolution of the platform through …/CD practices. Are experienced with AWS and infrastructure as code (e.g., Terraform). Have knowledge of event-driven architecture and API design. Feel confident to jump into different aspects of our code base, orient yourself and remove blockers for the team Are motivated to coach and develop engineers ...

Software Engineer

Hiring Organisation
Platform Recruitment
Location
City of London, Greater London, United Kingdom
Employment Type
Permanent
Salary
£90000 - £160000/annum
heavily backend-biased position but given the size of the team you will be working across the stack when needed Build scalable, performant systems Design and deliver end-to-end features with direct impact on customer value Work with product and ML teams to help translate abstract and complex … software function About you: Strong ability across scalable and performant systems You have a product mindset Statically typed language expertise Experience with API design Low ego and love of engineering Full details are available. Please don't hesitate to reach out for more information. ...

IT Solutions Architect (Integration / Azure)

Hiring Organisation
DGH Recruitment
Location
City of London, London, United Kingdom
Employment Type
Permanent, Work From Home
that supports business critical functions across the business. My client have migrated significant services to the cloud and now requires a lead architect to design and build the next generation of solutions including core finance and HR technology landscape, automating data flows, integrating systems, supporting in the delivery … real-time reporting and analysis, whilst driving a more mature awareness to data architecture and governance across the business. Responsibilities: - Lead the design and delivery of integrations across technology platforms and solutions. - Produce architectural documentation (HLDs, LLDs, diagrams, support guides). - Ownership of integration and application architecture in alignment ...

Backend Engineer

Hiring Organisation
Robert Half
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
Salary negotiable
Live platform Contributing to a shared transaction layer used across multiple products Collaborating with frontend and mobile engineers to deliver consistent experiences Key Responsibilities Design and build backend services end-to-end Contribute to platform and API design decisions Improve system performance and reliability Work within … evolving architecture with real production constraints Profile The Backend Engineer will have strong API and service development skills Experience working on transaction systems, payments, or eCommerce platforms is required Experience with GraphQL preferred Exposure to Elixir, Go, or similar backend technologies Ability to work effectively in ambiguous, fast-changing ...

Senior Merchant Platform PM - Core Data & APIs

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
financial technology company in Greater London is seeking a Product Manager to oversee the merchant account experience, focusing on API design and data architecture. The ideal candidate will have robust product management experience, particularly in complex, regulated environments and will be responsible for shaping foundational models and services. ...

Java Software Engineer

Hiring Organisation
Michael Page
Location
City of London, London, United Kingdom
Employment Type
Permanent
Salary
£50000 - £60000/annum
efficiency and excellence in every project. Description Develop and maintain Java-based software applications to meet client requirements. Collaborate with cross-functional teams to design and implement efficient technical solutions. Perform code reviews to ensure high-quality standards and best practices. Analyse and resolve technical issues and software bugs … familiarity with ORM frameworks (Hibernate/JPA). * Practical experience with trunk-based development. * Working knowledge of OAuth2/OpenID Connect, JWT, and secure API design. * Experience with CI/CD pipelines (Azure DevOps). * Demonstrated hands-on exposure to at least one of: LLM API integration, vector ...

Java Software Engineer

Hiring Organisation
Michael Page Technology
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£50,000 - £60,000 per annum
efficiency and excellence in every project. Description Develop and maintain Java-based software applications to meet client requirements. Collaborate with cross-functional teams to design and implement efficient technical solutions. Perform code reviews to ensure high-quality standards and best practices. Analyse and resolve technical issues and software bugs … familiarity with ORM frameworks (Hibernate/JPA). * Practical experience with trunk-based development. * Working knowledge of OAuth2/OpenID Connect, JWT, and secure API design. * Experience with CI/CD pipelines (Azure DevOps). * Demonstrated hands-on exposure to at least one of: LLM API integration, vector ...

Hybrid Backend Engineer, Rust — Global Fintech Clearing

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
infrastructure in a hybrid work environment. The ideal candidate will have a strong background in distributed systems, particularly with Rust, and possess skills in API design and implementation. Join Neara to help shape new solutions in the financial sector, ensuring reliability and compliance while working with innovative technologies. ...

Business Applications Technical Lead - Northeast office

Hiring Organisation
Morgan Philips UK Limited
Location
Newcastle upon Tyne, UK
equivalent. Essential skills & experience Strong technical understanding of business platforms such as Jitterbit, IFS, IMS or similar Solid experience with enterprise integration xkybehq patterns, API design, asynchronou Please click on the apply button to read the full job description ...

Software Engineer - Java /Back End

Hiring Organisation
Som3
Location
Basingstoke, Hampshire, United Kingdom
Employment Type
Permanent
Salary
£50000 - £65000/annum
Software Engineer - Java/Back End Hybrid - 2 days per week in the office Java, PostgreSQL, API We are looking for an experienced Back End Developer with excellent Java, PostgreSQL and API skills due to software development moving from an outsourced model to in-house. Working alongside … reviews with the outgoing external team. Gain understanding of the current Java application architecture - service boundaries, dependency injection patterns, build system, and deployment configuration. Design and implement new back-end features, enhancements, and bug fixes in Java, following agreed coding standards and architectural principles. PostgreSQL data model - schema design ...