151 to 175 of 201 API Design Jobs in the UK

Senior API Engineer — AI-Driven Standards

Hiring Organisation
Jobleads-UK
Location
United Kingdom
Identity is seeking Senior Software Engineers for its OneLogin team in the United Kingdom. You will own API standards, build tooling to auto-generate and validate specifications, and leverage AI to speed API design and documentation while reducing inconsistencies across services. The role emphasizes ownership, collaboration with ...

Python Engineer

Hiring Organisation
Adecco
Location
United Kingdom
Employment Type
Contract
Contract Rate
GBP Annual
expertise in Python development. AI Knowledge : Familiarity with LLMs and Generative AI solutions, along with frameworks like LangChain or LangGraph. Technical Skills : Proficiency in API design and integration, SQL, data processing, Git, and CI/CD practises. Production Focus : A solid engineering mindset with the capability to extend ...

Python Engineer

Hiring Organisation
Adecco
Location
North West, United Kingdom
Employment Type
Contract
expertise in Python development. AI Knowledge : Familiarity with LLMs and Generative AI solutions, along with frameworks like LangChain or LangGraph. Technical Skills : Proficiency in API design and integration, SQL, data processing, Git, and CI/CD practises. Production Focus : A solid engineering mindset with the capability to extend ...

Senior Software Engineer II - Payin Platform - Backend (Java)

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
high-volume, high-leverage platform role: the systems you build are used by many teams across the company, so correctness, reliability, and thoughtful API design matter enormously. Qualifications What do you need? 5+ years of experience in Java, Kotlin, Python or Go Strong experience with Spring framework, relational ...

Senior Data & Integration Architect

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
requires clear ownership of data, well-defined integration patterns, and controlled transitions between systems. The Senior Data & Integration Architect provides the architectural leadership to design these flows, define boundaries, and ensure that the service can operate reliably throughout this evolution. Role Purpose The Senior Data & Integration Architect is responsible … transition and enables the organization to move with control and confidence. Key Responsibilities Define the target data and integration architecture for the service landscape Design transition patterns that allow two environments to operate together Establish data ownership models, system boundaries, and integration contracts Support wave and delivery planning with ...

Senior Engineering Manager - Enterprise Trust & Reliability

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
surprises at review time. Own delivery and technical direction. Partner with the tech leads on architecture, and hold the standard for how the teams design, review, and ship across two quite different technical domains. Hire and raise the bar. Fill the open seats using our High‐Agency & AI‐Native … both domains. You needn't be the deepest expert in either, but you hold your own with senior engineers on both sides: integration and API design, identity and SSO, and third‐party systems on the CTI side; reliability, observability, incident response, and SLOs on the S&O side. ...

Solution Architect

Hiring Organisation
Artis Recruitment
Location
BS1, Bristol, City of Bristol, United Kingdom
Employment Type
Permanent
Salary
£65000 - £70000/annum + 10% Bonus and Excellent Benefits
translate business requirements into practical technical solutions. Define integration approaches, APIs and data flows between enterprise platforms and business systems. Support architecture governance, technical design reviews and solution assurance activities. Ensure solutions meet security, scalability, resilience and operational support requirements. Work collaboratively with internal stakeholders, delivery teams and third … party suppliers throughout the project lifecycle. Contribute to architecture standards, best practice and reusable design patterns. About You We're looking for an experienced Solution Architect with broad technical knowledge rather than a specialist in a single discipline. You'll be comfortable engaging with both technical and non-technical ...

Senior Cloud Full-Stack Engineer (AWS)

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
Pacific Life Re in the United Kingdom is seeking an experienced Cloud Full‐Stack Developer with a focus on AWS to design, build and operate secure cloud platforms for underwriting analytics. You will own end‐to‐end delivery, spanning frontend, backend, and AWS native services, while aligning with enterprise … architecture and security controls. The role requires hands‐on Python/.NET development, API design, DevSecOps practices, and experience delivering in regulated financial services #J-18808-Ljbffr ...

Software Developer

Hiring Organisation
Orchard Recruitment Ltd
Location
Douglas, Isle of Man, United Kingdom
Employment Type
Permanent
Salary
£40000 - £50000/annum
here you will: Build and own a number of projects end to end: backend, deployment, and the day-to-day of keeping them healthy Design systems that are simple to run and simple for the next person to read Work with AI agents as a normal part … Cloud and deployment: you can put a service into production and look after it, not just write the code Solid grounding in system design and engineering principles. You think about failure, data, and maintenance before you think about frameworks Fluent with agentic development. You've built real things with ...

Full Stack Engineer

Hiring Organisation
RED Global
Location
United Kingdom
development using Symfony and/or Laravel HTML, CSS and modern frontend development Experience with React, Vue or Svelte SQL and relational databases API design and integration Git and collaborative development workflows Comfortable working with Linux environments and deployment workflows Strong debugging and problem-solving skills WordPress development … Flutter/mobile development Heroku or similar hosting platforms Cloud storage, media handling and third-party API integrations Experience using AI tools to improve development workflows, with the ability to critically review AI-generated code Pay range and compensation package £50,000 per/annum If you are interested ...

Principal Software Architect

Hiring Organisation
Spectrum It Recruitment Limited
Location
Uxbridge, London, United Kingdom
Employment Type
Permanent, Work From Home
models and integration patterns Reviewing significant technical initiatives and providing architectural guidance across multiple engineering teams Embedding security, resilience, scalability and observability into platform design from the outset Identifying architectural risk, technical debt and platform constraints Partnering with Engineering and Product leadership on strategic technical decisions Influencing engineering teams … experience defining architecture across SaaS, product-led or platform-based environments Experience working across complex, multi-system or distributed technology landscapes Strong understanding of API design, integration architecture and service-oriented systems Cloud architecture experience, ideally within Azure A strong appreciation for security-by-design, resilience, scalability ...

Senior Solution Architect - MS Azure, AI Foundations

Hiring Organisation
Fusion People
Location
London, United Kingdom
Employment Type
Permanent
Salary
GBP 115,000 - 120,000 Annual
architectural function from scratch and a transformation modernization. You will report into the Head of Architecture and work closely with architects across domains to design (HLD, LLD) and deliver scalable solutions and end to end integration solutions in marketing, security, finance, data, product, archiving, document management amongst others. Essential … principals Mentor SME's and technical leads on architecture patterns and best practices Solution integration technology - Strong experience designing integration solutions across enterprise applications. API design, messaging patterns, and integration architectures. Experience with security architecture, data protection, relational databases (SQL Server) and data integration patterns. Experience with Ardoq ...

Principal Embedded Software Engineer I

Hiring Organisation
Jobleads-UK
Location
Milton Keynes, England, United Kingdom
their systems.As a Cesium software team member, you will be responsible for software designs from concept through production, including product roadmaps, block diagrams, detailed design and coding, analysis, test, qualification, and in-orbit support. The ideal candidate will have development experience at nearly every level of the software stack … have experience in software testing and high-reliability qualification, as well as software engineering and software project management practices.The successful candidate will present engineering design review materials to our customers and executive team, as well as participate in proposal‐writing efforts. As such, excellent written and verbal communication skills ...

Senior iOS Engineer II - Account Mobile

Hiring Organisation
Wise
Location
Greater London, United Kingdom
Employment Type
Full Time
Wise Account users. Collaboration is key to how we operate across the business in this role, and you will work alongside product, design, and analytics teams to create the best tools for our users, helping them manage their cross-currency needs with ease whilst shaping the Wise Account offering. … build consistent experiences across Wise’s native applications and the web and enable features with a customer centric focus. Collaborate closely with product, design (UI), analytics, and other teams across the company to deliver impactful experiences to Wise users as part of a cross-functional team. Take responsibility ...

Solution Architect - MS Azure Services, AI Foundations, API

Hiring Organisation
Fusion People
Location
London, United Kingdom
Employment Type
Permanent
Salary
GBP 75,000 - 88,000 Annual
architectural function from scratch and a transformation modernization. You will report into the Head of Architecture and work closely with architects across domains to design (HLD, LLD) and deliver scalable solutions and end to end integration solutions in marketing, security, finance, data, product, archiving, document management amongst others. Essential … foundational experience Although a solution architect role, a good understanding of enterprise architecture principals Solution integration technology - experience designing integration solutions across enterprise applications. API design, messaging patterns, and integration architectures. Experience with security architecture, data protection, relational databases (SQL Server) and data integration patterns. Experience with Ardoq ...

Senior Backend Engineer – AI-Driven, Scalable Platform

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
seeking a Backend Engineer with 5+ years of experience to own end-to-end work on AI-enabled data infrastructure. You will drive API design, data management, and scalable architectures while mentoring teammates. You’ll build with Python on a hybrid setup, collaborating across Product, Data Science ...

AI Integration Engineer

Hiring Organisation
Jobleads-UK
Location
City Of London, England, United Kingdom
Required Active UK SC Clearance (Mandatory — applications without this cannot be considered) Core Engineering: Strong backend development skills (Python, Go, or C++) with solid API design and data pipeline experience AI Tooling: Hands‐on experience integrating LLMs, handling vector databases, and building robust chunking/embedding strategies Secure ...

Lead Full Stack Engineer

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
problems end to end. You will bring strong JavaScript/TypeScript experience across frontend and backend development, alongside a clear understanding of API design and relational databases. You have mentored engineers and may already have line management experience, conducting development and performance conversations with maturity and clarity. ...

Business Systems Architect

Hiring Organisation
Proactive Appointments
Location
Truro, Cornwall, England, United Kingdom
Employment Type
Full-Time
Salary
£55,000 - £60,000 per annum
business but actively drives growth, efficiency and competitive advantage. The Opportunity This is a strategic, hands-on architecture role where you'll lead the design, integration and optimisation of critical business systems while influencing the organisation's long-term technology roadmap. You'll take ownership of enterprise applications, system … What You'll Be Doing Enterprise Systems & Architecture Lead the architecture, administration and continual improvement of the company's ERP platform (IFS Cloud). Design and deliver scalable system architecture that supports future business growth. Develop and maintain secure API integrations between internal systems, legacy applications and third ...

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 ...

AI‐Native Engineering Lead – Open Banking & Hybrid

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
Yapily is seeking an experienced Technical Software Engineering Lead to drive design, development and delivery of core microservices. You will blend hands-on coding with architectural oversight and people leadership to enable an AI-enabled engineering culture and faster developer velocity. You will own architectural decisions, shape APIdesign, ensure system health and collaborate with Product on capacity planning and strategy while mentoring ICs and guiding teams through complex engineering #J-18808-Ljbffr ...

Full-Stack Engineer, Publisher Inventory – London

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
Google Software Engineer III, Full Stack, Publisher Inventory in London, UK, is seeking a mid-level engineer to design and implement scalable monetization interfaces. You will work on ad configuration tools and AI-powered features across the stack, collaborating with PMs and UX teams. Experience with Kotlin, C++, TypeScript … Dart or Angular is expected, along with strong API design and cross-platform development skills. #J-18808-Ljbffr ...

Software Engineer, Core Networking & Bolt Protocols

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
Networking Engineering Team. You will work on the Neo4j network server modules, drivers, and binary protocol Bolt, shaping connectivity with Neo4j and drivers. Expect design leadership, implementation work, and chances to engage with the community. The role emphasizes 5+ years in Java, network development, and API design ...

AI Integration Engineer — SC-Cleared, Secure LLM Pipelines

Hiring Organisation
Jobleads-UK
Location
City Of London, England, United Kingdom
Associates is seeking an AI Integration Engineer with active UK SC clearance for a contract position in London. The role focuses on backend development, API design, and data pipelines, with hands-on work integrating LLMs and vector databases in secure, classified environments. You will work on self-hosted ...

Fullstack JavaScript Developer

Hiring Organisation
Opus Recruitment Solutions Ltd
Location
New Works, Telford, Shropshire, England, United Kingdom
Employment Type
Contractor
Contract Rate
£500 - £550 per day
Essential Experience: React Next.js Strong commercial experience developing scalable backend systems using TypeScript and Node.js. Deep understanding of software architecture, API design, integration patterns and modern engineering best practices. Experience working with high-volume data platforms, data integrations and large-scale data migrations. Exposure to Databricks integrations would ...