1 to 25 of 203 API Design Jobs in the UK

Integration Architect

Hiring Organisation
Hackajob Ltd
Location
South West London, London, United Kingdom
Employment Type
Permanent, Work From Home
within our DNA. Invest in us andwellinvest in you!. Job Description We are looking for an experienced Integration Solutions Architect to lead the design, governance and modernisation of enterprise integration solutions across cloud-native, legacy and external partner environments. The role will have a strong focus on Microsoft … Azure and Azure API Management (APIM) , designing secure, scalable and resilient integration architectures. You will work closely with engineering, platform, DevOps and architecture teams to establish API standards, integration patterns, automated deployment approaches and secure connectivity across Azure environments. Key Responsibilities Lead the end-to-end architecture ...

Senior Full Stack Engineer - Vialto Rewards - Senior Manager

Hiring Organisation
Vialto Partners
Location
London, UK
Employment Type
Full-time
same for you. Whatever your aspirations, Vialto can help you find your way. Job description Vialto is hiring a Senior Full Stack Engineer to design, build, and operate secure, scalable products that power our Compensation Collection, Shadow Payroll, and Equity offerings for the world's most complex multinational employers. … Shadow Payroll, and Equity products using Next.js, React, and TypeScript with a focus on performance, reliability, and clarity for tax, payroll, and mobility operators. Design and implement backend services and APIs using C#, .NET, and WebAPI to support compensation data ingestion, cross-border payroll calculations, equity event processing ...

Infrastructure Developer

Hiring Organisation
SQUAREPOINT CAPITAL
Location
London, UK
Employment Type
Full-time
service-level APIs. This is not a traditional infrastructure operations role. You will write production-quality code every day, designing and building the API fabric that connects every layer of the infrastructure stack. API Design & Ownership Across the Infrastructure StackBare Metal & Provisioning: API integration with provisioning … systems to drive automated server lifecycle - from hardware discovery and BIOS configuration through OS installation, burn-in, and production handover. Network Fabric: API-driven configuration of the network environmentsVirtualization & Cloud: API integration with cloud providers and on-premises platforms, enabling consistent resource lifecycle management across environments. Storage: API ...

Microsoft Full Stack Senior Developer (Manager)

Hiring Organisation
Accenture
Location
London, UK
Employment Type
Full-time
Stack Senior Developer who combines strong hands-on engineering expertise with end-to-end technical delivery leadership. You will lead engineering teams, shape solution design, make pragmatic technology decisions and remain close enough to the code to assure quality and unblock delivery. In this highly visible role, you will … lifecycle, from strategy and solution shaping through engineering delivery, transition to live service and ongoing optimisationIn our team, you will: Engineering and architectureLead the design and hands-on development of enterprise applications using C#, .NET, ASP.NET Core, Web APIs and modern distributed application patterns. Design responsive, accessible front ...

Senior Software Engineer (Full Stack) — Java & React

Hiring Organisation
Zühlke Engineering
Location
London, UK
Employment Type
Full-time
maintain high standards of engineering quality. How you will make an impact Build and maintain reliable JVM-based services using Kotlin or modern Java. Design and develop APIs and integrations following industry standards. Contribute to API design standards and documentation. Deliver complete end-to-end features … Understanding the difference between relational, NoSQL and other persistence technologies. Experience building shared platforms, common services or greenfield technical foundations. Building APIs adhering to design principles such as RESTful API design Building observable systems Experience in regulated or financial-services environments. Exposure to payments, transaction processing ...

Senior Software Engineer (Full Stack) — Java & React

Hiring Organisation
Zühlke Engineering
Location
Manchester, Greater Manchester, United Kingdom
Salary
£ 70 K
maintain high standards of engineering quality. How you will make an impact Build and maintain reliable JVM-based services using Kotlin or modern Java. Design and develop APIs and integrations following industry standards. Contribute to API design standards and documentation. Deliver complete end-to-end features … Understanding the difference between relational, NoSQL and other persistence technologies. Experience building shared platforms, common services or greenfield technical foundations. Building APIs adhering to design principles such as RESTful API design Building observable systems Experience in regulated or financial-services environments. Exposure to payments, transaction processing ...

Senior Platform Engineer

Hiring Organisation
Willis Towers Watson
Location
Reigate, Surrey, United Kingdom
Salary
£ 70 K
Provide 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 with … control plane engineeringPractical experience designing and developing management and controlplane capabilities for line of business 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-region ...

Application Architect

Hiring Organisation
London Stock Exchange Group
Location
Nottingham, Nottinghamshire, United Kingdom
Salary
£ 70 K
Come join the Risk Intelligence Content Curation and Distribution team as an Application Architect, and help drive application design, as we support our World-Check customers in protecting against sanctions evasion, money laundering, human trafficking, terrorisim and more!Role summary:The Application Architect plays a key technical role within … this role contributes to their the architecture and technical direction on the Risk Content Curation and Distribution PlatformThis role focuses on application‐level architecture, design quality, and technical guidance, working closely with Solution Architects, Product Owners, and engineering teams. You will help translate business and non‐functional requirements into ...

Application Architect

Hiring Organisation
London Stock Exchange Group
Location
London, UK
Employment Type
Full-time
Come join the Risk Intelligence Content Curation and Distribution team as an Application Architect, and help drive application design, as we support our World-Check customers in protecting against sanctions evasion, money laundering, human trafficking, terrorisim and more! Role summary: The Application Architect plays a key technical role within … this role contributes to their the architecture and technical direction on the Risk Content Curation and Distribution PlatformThis role focuses on application‐level architecture, design quality, and technical guidance, working closely with Solution Architects, Product Owners, and engineering teams. You will help translate business and non‐functional requirements into ...

Senior Platform Engineer

Hiring Organisation
WTW
Location
Reigate, Surrey, United Kingdom
Employment Type
Permanent
Salary
GBP Annual
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 … control plane engineering Practical experience designing and developing management and controlplane capabilities for line of business 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 ...

Senior Python Django Developer

Hiring Organisation
RWS
Location
London, UK
Employment Type
Full-time
Please note that this is a hybrid role at either our Sheffield or London office. Job Overview Key ResponsibilitiesDelivery and technical craft Lead the design and delivery of back-end features, APIs and integrations across our core applications, from requirement through to release. Ensure clean, maintainable and well-tested … standard that the rest of the team works to. Own architectural decisions within the back-end codebase, including service boundaries, data models and API design, making sure they are documented, understood and applied consistently. Design and optimise PostgreSQL schemas and queries so that our applications stay fast ...

Technical & Solution Architect (Distributed Ledger / Regulated Financial Services)

Hiring Organisation
Delta Capita
Location
London, UK
Employment Type
Full-time
hands-on technical leadership position in the making. You will work across product management, engineering, and client-facing discussions to document and evolve the design of a distributed ledger-based post-trade platform operating within regulated financial services. You will initially contribute as our technical documentation lead while progressively … taking ownership of system-level architecture, solution design, and technical direction. This role is ideal for someone who wants to: Move from senior technical writer or senior engineer to architect; Work on real financial market infrastructure problems; Combine deep technical thinking with business context; Shape a product ...

Solution Architect

Hiring Organisation
ISR RECRUITMENT LIMITED
Location
Nationwide, United Kingdom
Employment Type
Contract
Contract Rate
£540 - £560/day (Outside IR35)
strong software engineering background who can turn complex requirements into clear designs and practical development tasks. Working alongside established delivery squads, you will design and assure technical solutions, resolve complex integration challenges and translate architecture into actionable engineering work and shape solutions across interconnected platforms and external services. Your … work will span API design, systems integration, platform enhancements and technical migrations, taking solutions from initial design through assurance and into implementation. Skills and Experience: Proven Solution Architecture experience combined with a strong software engineering background. Expertise in API design, system integration and cloud-based ...

Product Manager - Global Card Issuing Platform (BaaS)

Hiring Organisation
WorldFirst
Location
London, UK
Employment Type
Full-time
infrastructure that allows clients to launch card programs anywhere in the world through a single integration. You will be responsible for a unified Global API and SDK suite that abstracts the complexity of regional payment networks. Whether a client is launching in Europe, North America, or APAC, your product … will provide a consistent, white-label experience. You will drive both the technical "how" (API/SDK design) and the strategic "where" (global expansion and regional issuing setups). What you'll do: Unified Global API Strategy: Design and maintain a single, polymorphic API architecture ...

Senior Software Development Engineer

Hiring Organisation
Expedia
Location
London, UK
Employment Type
Full-time
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 ...

Director Data & Analytics API Experience - Data Services

Hiring Organisation
CME- Group
Location
Belfast, UK
Employment Type
Full-time
Director Data & Analytics API Experience - Data ServicesBackground: CME Group runs some of the world's largest and most important trading venues, including derivatives exchanges, FX/FI platforms. The trading participants include leading investment banks, hedge funds, proprietary trading firms, investment managers, and retail traders, as well as additional … stakeholders such as independent software vendors (ISVs) and data redistributors. To support our unique data and analytics products, we are now building a unified API-first distribution framework, simplifying consumption and value extraction. The Role: We are seeking a key stakeholder for the CMEG External Data-Analytics (DA) APIs ...

Director Data & Analytics API Experience - Data Services

Hiring Organisation
CME- Group
Location
London, UK
Employment Type
Full-time
Director Data & Analytics API Experience - Data ServicesBackground: CME Group runs some of the world's largest and most important trading venues, including derivatives exchanges, FX/FI platforms. The trading participants include leading investment banks, hedge funds, proprietary trading firms, investment managers, and retail traders, as well as additional … stakeholders such as independent software vendors (ISVs) and data redistributors. To support our unique data and analytics products, we are now building a unified API-first distribution framework, simplifying consumption and value extraction. The Role: We are seeking a key stakeholder for the CMEG External Data-Analytics (DA) APIs ...

Senior Application Architect (Java with AWS)

Hiring Organisation
London Stock Exchange Group
Location
Nottingham, Nottinghamshire, United Kingdom
Salary
£ 70 K
innovation within the LSEG ecosystem.WHAT YOU'LL BE DOING: Build Logical, Physical, Implementation and Process Solution Architecture designs where required.Be responsible for cloud infrastructure design and develop detailed architecture design for the application.Through understanding of cloud native architecture and principles.Optimise cost of cloud solutions by identifying waste … implementation for availability, recovery, reusability, performance, maintainability, security, capacity, and compatibility.Partner with Solution Architects to produce where required:Domain/business logic model designInteroperability design such as API and MessagingData model designPartner with the Infrastructure team to produce physical architecture designs.Pair design with other Application Architects ...

Senior Application Architect (Java with AWS)

Hiring Organisation
London Stock Exchange Group
Location
Nottingham, UK
Employment Type
Full-time
LSEG ecosystem. WHAT YOU'LL BE DOING: Build Logical, Physical, Implementation and Process Solution Architecture designs where required. Be responsible for cloud infrastructure design and develop detailed architecture design for the application. Through understanding of cloud native architecture and principles. Optimise cost of cloud solutions by identifying waste … availability, recovery, reusability, performance, maintainability, security, capacity, and compatibility. Partner with Solution Architects to produce where required: Domain/business logic model designInteroperability design such as API and MessagingData model designPartner with the Infrastructure team to produce physical architecture designs. Pair design with other Application Architects ...

Senior Application Architect (Java with AWS)

Hiring Organisation
London Stock Exchange Group
Location
London, UK
Employment Type
Full-time
LSEG ecosystem. WHAT YOU'LL BE DOING: Build Logical, Physical, Implementation and Process Solution Architecture designs where required. Be responsible for cloud infrastructure design and develop detailed architecture design for the application. Through understanding of cloud native architecture and principles. Optimise cost of cloud solutions by identifying waste … availability, recovery, reusability, performance, maintainability, security, capacity, and compatibility. Partner with Solution Architects to produce where required: Domain/business logic model designInteroperability design such as API and MessagingData model designPartner with the Infrastructure team to produce physical architecture designs. Pair design with other Application Architects ...

SAP BTP Integration Architect

Hiring Organisation
Vbeyond
Location
London, South East England, United Kingdom
Employment Type
Full-Time
Salary
Competitive salary
govern the end-to-end integration strategy for the S/4HANA Bluefield migration, ensuring alignment with enterprise architecture principles. Architect BTP Solutions: Design and architect robust integration scenarios using the full suite of SAP BTP services, with a heavy focus on SAP Integration Suite (Cloud Integration/… API Management, and Event Mesh. Govern Technical Design: Lead design authority sessions to review and approve all integration patterns, ensuring they are standard, reusable, and fit for purpose. Bluefield Migration Expertise: Provide expert guidance on the unique integration challenges of a Bluefield (system conversion) migration, including ...

Senior Backend Product Engineer

Hiring Organisation
CAIS
Location
London, UK
Employment Type
Full-time
Senior Backend Product Engineer to join our Capital Markets technology team in London. This is a hybrid, hands-on role: you'll design, build and run systems across Pre-Trade, Trade and Post-Trade, covering Structured Investments, Equity IPOs, Hedging & Monetization, ETFs, and more. … integration and end-to-end tests, with good judgment about what to test at each levelStrong experience with Spring (Boot, Data, Security), relational database design, REST API design, and Kafka or a similar event streaming platform Experience working AI-first: using AI agents to build software, with ...

Senior Full Stack Java Engineer

Hiring Organisation
Luxoft
Location
London, UK
Employment Type
Full-time
Project description As a Senior Full Stack Java Engineer within the US Corporate Loans POD, you will design, develop, and deliver enterprise integration solutions connecting Loan IQ with upstream and downstream platforms. You will leverage modern cloud-native technologies, AI-assisted development tools, and Agentic AI practices to improve … building AI agents and intelligent engineering solutions that automate and enhance Software Development Lifecycle (SDLC) processes, improving developer productivity and accelerating delivery outcomes. Responsibilities Design and develop REST APIs, event-driven integrations, and messaging interfaces. Build and maintain integrations between Loan IQ and enterprise applications. Design and implement ...

Product Lead - Integrations and Orchestrations

Hiring Organisation
WPP
Location
London, United Kingdom
Salary
£ 70 K
delivery.• Produce high-quality, engineering-ready requirements that are clear, testable, prioritised, technically feasible and traceable to business outcomes.• Own and prioritise delivery of API-first, event-driven, asynchronous, and system-to-system integrations across SaaS and bespoke platforms.• Facilitate workshops and working sessions to clarify requirements, resolve ambiguity … need:• Experience as a Product Owner, Technical Product Manager, Technical Analyst, Platform Owner, or Integration Lead in a complex enterprise environment.• Strong understanding of API design, API-led integration, system-to-system integration, workflow orchestration, event-driven patterns, domain-driven design, and data exchange.• Experience managing ...

Solution Architect

Hiring Organisation
Optimizely
Location
London, UK
Employment Type
Full-time
reaches general availability and Professional Services delivery can run it independently. After general availability, Delivery leads and you provide background support. On ESAI, you design and build the AI systems that advance Professional Services delivery. This is a small, growing team, so responsibilities span architecture, engineering, documentation, and enablement. … high bar regardless of background. The role requires identifying where AI improves delivery economics, and building the solutionJob Responsibilities Architect AI-driven solutions. Design agents, integrations, and automation that change how engagements are delivered. Solutions should be reusable across accounts, not one-off scripts. Lead delivery through GA. ...