1 to 25 of 226 Permanent API Design Jobs in England

Kong API Gateway Specialist

Hiring Organisation
Infoplus Technologies UK Limited
Location
London, South East England, United Kingdom
Employment Type
Full-Time
Salary
£400.00 - £450.00 per day
Summary We are seeking an experienced Kong API Gateway Specialist to lead the development, implementation, and governance of our enterprise API ecosystem. This role will be responsible for establishing API governance standards, designing and managing API lifecycle processes, and driving the adoption of best practices across … integration and middleware platforms. The ideal candidate will possess deep expertise in Kong API Gateway, API management, security, integration architecture, and governance frameworks. They will work closely with enterprise architects, development teams, security teams, and business stakeholders to ensure APIs are secure, scalable, reusable, and aligned with organizational ...

Senior Software Development Engineer

Location
City Of London, England, United Kingdom
role in shaping our technical domain with the goal of powering all Expedia Group’s brands and product lines. In this role, you will: Design, build, and evolve robust, scalable, and secure backend services and applications, including clear low-level and high-level designs, APIs, data models, and explicit … pricing and offers experiences across Expedia Group brands. Lead end-to-end implementation of complex features and systems within the Offers Domain, from technical design and coding through testing, deployment, monitoring, and ongoing operational support, ensuring simple, accurate, and transparent pricing throughout the shopping and booking journey. Partner closely ...

Principal Engineer (Gen AI and MACH Architecture)

Location
Greater London, England, United Kingdom
believe in the imaginative application of art and science to create beautiful ideas, products and services. With an entrepreneurial and collaborative approach, we design and build adaptive digital products, services and experiences that capture the imagination and deliver impressive returns for our clients. We are looking for a senior … technical leadership, architecture and team guidance. You will lead the technical direction of complex client programmes across MACH architectures and production Generative AI; spanning Design to Code workflows, solution design and API contracts through to cloud infrastructure, deployment and ongoing operation. You will own architecture decisions, write ...

Software Engineer (Digital)

Location
Hemel Hempstead, England, United Kingdom
Contribute to Club Warner loyalty platform features — enrolment flows, member personalisation, and loyalty mechanics — consuming APIs from back-end services. Back-End Microservice Development Design and build .NET 8/ASP.NET Core microservices that form the back-end of Warner's digital platform — implementing REST APIs, domain logic … between services using AWS SQS, SNS, and EventBridge — ensuring loose coupling and resilience across the microservices estate. Contribute to integrations with the WhatsApp Business API via Amazon Connect for inbound customer engagement. API Design & Integration Design RESTful APIs to agreed standards — implementing OpenAPI specifications, versioning ...

Machine Learning Scientist III

Location
City of Westminster, England, United Kingdom
that build loyalty and traveler satisfaction. In this role, you will: Develop, evaluate, and improve machine learning models and algorithms for Content AI applications. Design and implement end-to-end machine learning solutions, including data preparation, feature engineering, model training, validation, deployment, monitoring, and continuous optimisation. Apply statistical analysis … technical direction. Collaborate with engineers, product managers, applied scientists, and domain experts to translate ambiguous business problems into scalable ML solutions. Contribute to system design, low-level design, API development, and data modelling for production machine learning systems. Build and operate production solutions using technologies such ...

Integration Engineering Manager

Location
Greater London, England, United Kingdom
capability is responsible for advancing Insulet’s AI enablement foundation through MuleSoft Anypoint Platform, MuleSoft AI Gateway, Model Context Protocol (MCP), MuleSoft Agent Fabric, API-led connectivity, event-driven integration, and secure agent-to-system orchestration. The role will help transform existing enterprise APIs and integrations into trusted, reusable … portfolio, lead a globally distributed MuleSoft engineering team, and partner with Enterprise Architecture, AI/ML, Salesforce, Data, Security, Product, and Platform teams to design and operate the integration layer for the agentic enterprise in a highly regulated healthcare environment. Global AI Enablement & Collaboration Model Serve as a primary ...

Technical Product Manager

Hiring Organisation
HUKM Development
Location
Buckinghamshire, England, United Kingdom
Probation: 6 months About the role As a Technical Product Manager at HUKM, you will lead the development and delivery of backend and API-driven products. You will manage development pods, translate business requirements into technical solutions, and drive execution through agile delivery. This is a hands-on technical … development pods of 15 to 20 engineers, ensuring effective collaboration and delivery Define product roadmaps, prioritise features, and maintain product backlogs for backend and API initiatives Design and document API specifications, data models, and system architecture alongside engineering teams Run sprint planning, daily standups, sprint reviews ...

Senior Software Development Engineer, AdTech

Location
Greater London, England, United Kingdom
across Expedia’s white-label and partner platforms. We’re building the next generation of video ad infrastructure, AI-powered tooling, and Rapid API integrations to deliver smarter, more engaging ad experiences. In this role, you will: Design, implement, and evolve high-quality software services and components, including … system design, low-level design, API design, and data modeling to support scalable, reliable products. Lead end-to-end delivery of complex technical features across services or domains, including requirements clarification, solution design, development, testing, deployment, and ongoing operational support. Collaborate closely with product, architecture ...

Lead Software Engineer - GLCM Postings

Location
Bournemouth, Hampshire, United Kingdom
with business goals and industry best practices Lead and mentor a team of software engineers, providing guidance, support, and professional development opportunities Drive the design and implementation of high-performance backend services using Java and cloud-native technologies Champion the development of highly resilient, share-nothing, multi-region architectures … availability, and disaster recovery Drive the adoption and optimization of MongoDB (including change streams), Kubernetes, and other modern platforms Set and enforce standards for API design and development (REST/gRPC), including best practices for versioning, documentation, and error handling to ensure robust, secure, and scalable interfaces Guide ...

Software Development Engineer

Location
Welwyn, England, United Kingdom
Develop and maintain core features of the Therapeutic Molecule Registration platform Design and implement RESTful APIs and microservices serving molecular data to research and machine learning teams Write high-quality, testable code for chemical registration workflows Contribute to technical design discussions and help harmonise multiple registration systems Design cloud-native systems that support rapid iteration between computational molecule design and experimental validation Partner with Computational Sciences, machine learning for drug development, and Drug Discovery groups including Antibody Engineering Collaborate with scientists and grow expertise in chemical and biological data management Requirements Degree in Computer Science ...

Senior Technical Architect

Location
Greater London, England, United Kingdom
transact), we are seeking a Principal Technical Architect. Serving as the senior technical authority on our AWS and cloud engagements, you will own the design and quality of robust, scalable applications. Key Responsibilities Architect Agentic Solutions: Design enterprise cloud applications, specializing in agentic AI platform components (orchestration, memory … doing Technical Leadership & Governance: Act as the account's senior authority on complex cloud architectures (esp. AWS serverless). Establish technical governance, design standards, and manage risk, non-functional requirements (NFRs), and technical debt. Agentic AI & Commerce Innovation: Design AWS-based agentic AI platforms (orchestration, RAG, memory, guardrails ...

Integration Architect - Java, AWS, FS - OutsideIR35

Hiring Organisation
Sanderson
Location
London, South East England, United Kingdom
Employment Type
Full-Time
Salary
£550.00 - £600.00 per day
connectivity across the clients core systems. Key Responsibilities: Own and evolve integration architecture aligned with enterprise standards Define and govern integration patterns across teams Design and deliver event-driven, API-first, and messaging solutions (NATS, REST) Lead end-to-end integration delivery, including hands-on development (Java/… Spring) Ensure scalable, cloud-native solutions on AWS Produce architecture artefacts (blueprints, contracts, ADRs) Guide teams on best practices, API governance, and event design Engage stakeholders and align cross-team integration efforts Primary Skills: Event-driven architecture and messaging systems (NATS, pub/sub, async patterns) API ...

Solution Architect - Data & AI Specialist

Hiring Organisation
ITH Pharma
Location
Park Royal, London, Middlesex, United Kingdom
Employment Type
Permanent
Salary
£75000 - £85000/annum
experienced AI Architect who enjoys solving complex technical problems while staying close to delivery. This is a genuinely hands on role where you will design enterprise AI solutions, partner with senior stakeholders across the business and work alongside engineering teams to bring modern AI capabilities into production. … role where you can combine deep technical expertise with meaningful business impact, we would love to hear from you. ----------------------------------------- Key Responsibilities Architect Agentic Solutions: Design enterprise cloud applications, specializing in agentic AI platform components (orchestration, memory, tool integration, identity, guardrails, observability) and emerging Agentic Commerce. Lead Clients & Drive Growth ...

Senior Software Engineer

Hiring Organisation
Hargreaves Lansdown
Location
Bristol, Avon, South West, United Kingdom
Employment Type
Permanent, Part Time
Full Stack Engineer to help build and evolve the services that support our customers and business. Working primarily within AWS serverless environments, you'll design and deliver scalable backend services, APIs and platform capabilities, while contributing across the full stack where required. You'll play a key role … team, you'll contribute to the adoption of modern cloud-native technologies, GraphQL architectures and AI-enabled development practices. What you'll be doing Design, develop and support scalable backend services and APIs. Build AWS serverless applications using modern engineering practices. Develop integrations with internal and external systems. Enhance ...

Senior Platform Engineer

Location
Reigate, England, United Kingdom
technical input, guidance and leadership to the team (including code quality, best practices, processes, some aspects of release management, etc.). Assist in the design and documenting of solutions meeting functional and non-functional requirements. Lead by example getting directly involved in the day-to-day delivery of work … bring Platform and controlplane engineering Practical experience designing and developing management and controlplane capabilities for lineofbusiness or SaaS applications, including stack/environment management, API design for platform services, and developer/operator UX. Experience working with or designing Azure stamp-based or scale‐unit architectures, including multi ...

frontend developer for business planning

Location
Greater London, England, United Kingdom
Build and maintain user interfaces for client-facing features, ensuring high-quality and performant UI delivery Collaborate with backend engineers and product managers to design, develop, and deliver new features while providing technical input on API design and data handling Implement and enhance AI-driven capabilities that … with complex workflows Develop advanced data visualizations, including charts, maps, and dashboards, that provide real-time interactive insights Contribute to and maintain the internal design system, including custom caching mechanisms and advanced state management solutions Balance new feature delivery with ongoing maintenance and performance optimization Identify and resolve issues ...

Senior Software Engineer

Hiring Organisation
The Portfolio Group
Location
City of London, London, United Kingdom
Employment Type
Permanent
Salary
£90000/annum
integration layer behind a new generation of AI-powered products. This is a genuinely full-stack engineering role, combining production-grade backend development, API design, AI integrations and frontend engineering. You'll work across the full application lifecycle, designing the services and interfaces that connect AI capabilities … products customers and colleagues use every day. You'll play a key role in building MCP integrations, agent-to-agent connectivity and robust API services, while also developing responsive, accessible interfaces in React and TypeScript. What you'll be doing Own the application and integration layer of AI products ...

Senior Software Engineer

Hiring Organisation
The Portfolio Group
Location
London, South East England, United Kingdom
Employment Type
Full-Time
Salary
£90,000 per annum
integration layer behind a new generation of AI-powered products. This is a genuinely full-stack engineering role, combining production-grade backend development, API design, AI integrations and frontend engineering. You'll work across the full application lifecycle, designing the services and interfaces that connect AI capabilities … products customers and colleagues use every day. You'll play a key role in building MCP integrations, agent-to-agent connectivity and robust API services, while also developing responsive, accessible interfaces in React and TypeScript. What you'll be doing Own the application and integration layer of AI products ...

Software Engineer III, Android, Jetpack Compose

Location
Greater London, England, United Kingdom
Master's degree or PhD in Computer Science or a related technical field. 2 years of experience with data structures and algorithms. Experience with API Design, Android Libraries, Declarative Programming and API Development. Previous knowledge of Jetpack Compose. Familiarity with Android as a platform and have … well beyond web search. We're looking for engineers who bring fresh ideas from all areas, including information retrieval, distributed computing, large-scale system design, networking and data storage, security, artificial intelligence, natural language processing, UI design and mobile; the list goes on and is growing every day. ...

Technical Solution Architect

Hiring Organisation
Fruition Group
Location
London, United Kingdom
Employment Type
Permanent
architecture of a ledger-based post-trade platform. You'll start hands-on as a senior engineer, and take on increasing ownership of system design, technical direction, and solution architecture as you grow into the role. Why This Role You'll have real influence in a small, high-calibre … genuine voice in product and architectural decisions. Expect a fast learning curve across technology, regulation, and market structure. What You'll Do Architecture & System Design Design secure, scalable distributed systems for regulated environments Define and evolve system architecture, APIs, and integration patterns Apply sound software design patterns ...

Senior Full Stack Engineer

Location
Greater London, England, United Kingdom
through engineering consultancy Requirements 5+ years of Full Stack Engineering experience Experience with React or React Native Experience with Java and Spring Boot RESTful API design and development Microservices architecture SQL/database technologies TDD, BDD, unit testing, and integration testing GitLab CI/CD pipelines Cloud engineering … Core Competencies Demonstrates expertise in Full Stack Engineering with a focus on building and maintaining applications using React, Java, and AWS. Proficient in RESTful API design, microservices architecture, and implementing secure coding practices while ensuring code quality through TDD and CI/CD pipelines. Highest-signal resume keywords ...

Principal Software Engineer

Location
Peterborough, England, United Kingdom
enterprise‐grade products trusted by enterprise customers. This hands‐on engineering role involves designing and building AI capabilities across Epicor’s ERP portfolio. Responsibilities Design and build the next generation of AI capabilities across Epicor’s ERP portfolio. Lead rapid PoC and MVP exploration of new AI capabilities … evolve successful ones into production‐grade services. Design and build cloud platform services, APIs, data layers, and integrate them with large, established ERP products. Bring research & development output up to enterprise standard: reliability, observability, security, multi‐tenancy, and safe failure behavior. Integrate LLMs and agentic patterns responsibly, establishing guardrails ...

Senior Software Development Engineer

Location
Greater London, England, United Kingdom
with a growth mindset. We value our team culture and work together from the office three times a week. In this role, you will: Design, build, and maintain robust full stack applications and scalable services across multiple domains, applying deep technical expertise and architectural skills. Lead … development process, including system design, API design, and data modelling, ensuring quality and maintainability of solutions. Collaborate across engineering, product, and business teams to define requirements, deliver impactful features, and drive technology strategy. Mentor and guide engineers, fostering best practices in coding, testing, and operational excellence within ...

Senior iOS Engineer, Swift

Location
Greater London, England, United Kingdom
Mobile Engineer and Head of Mobile Engineering to deliver Zopa’s mobile strategy Help shape the technical direction and standards for iOS across Zopa Design and evolve shared modules, APIs, architecture and developer tooling for multiple engineering teams Identify technical risks early using data, profiling and observability to improve … platform and customer-facing product work Raise the capability of other engineers through pairing, code reviews, technical discussions and knowledge sharing Collaborate with Product, Design, Backend and Android colleagues Contribute to the Mobile Platform team supporting the app’s architecture, shared capabilities, libraries, build infrastructure and analytics infrastructure Help ...

Java Software Engineer

Location
Manchester, England, United Kingdom
global growth trends driven by digital adoption and regulatory expansion across lottery and iGaming markets. Well, what about the team? Join our dynamic Sports API team (named Matchday), where you\'ll be at the forefront of creating our Online Sportsbook APIs that underpin the Bally Bet experience. … online entertainment! So, what will you be doing? Develop product features, updates and capabilities. Use TDD methodologies to produce high quality well documented code. Design and develop customer focussed solutions. Understand the goals and business objectives of your team and domain. Use agile methodologies and work together to meet ...