1 to 25 of 336 API Design Jobs

Senior Software Development Engineer

Hiring Organisation
Jobleads-UK
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 ...

Solution Architect

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
Title: Solution Architect (API Lab & Marketplace Focus) Location: London/Edinburgh Job Type: Full-time About Us: At Lloyds Banking Group, we're helping Britain prosper by transforming the way technology enables our customers, colleagues, and businesses. Through strategic we're creating scalable, secure, and resilient services that power … some of the UK's most important financial journeys. Within Lloyds Banking Group, the API Lab sits at the heart of our API and Digital Services Platform. Our mission is to enable teams across the Group to discover, build, deploy, and reuse high-quality APIs safely ...

Staff Software Engineer (API Development)

Hiring Organisation
Jobleads-UK
Location
United Kingdom
call responsibilities and requires a strong commitment to modern engineering practices, including AI‐augmented development. We are looking for engineers who take full ownership — design, build, test, deploy, and operate — rather than handing work off between silos. In this role, you will focus on standardizing API development through … tooling and automation, improving consistency, usability, and integration velocity across services. You will leverage AI‐powered tools to accelerate API design, validation, and standardization — improving developer workflows and reducing inconsistency at scale. Responsibilities Standardize API development through tooling and automation so the right approach is the default ...

GCP Solution Architect

Hiring Organisation
83zero Ltd
Location
Edinburgh, City of Edinburgh, United Kingdom
Employment Type
Permanent
Salary
£80000 - £100000/annum
Location: Edinburgh Salary: £80,000 - £100,000 Job Type: Permanent The Role We are looking for an experienced Solution Architect - API & GCP to join a growing technology team in Edinburgh. You will play a key role in shaping the architecture and strategic evolution of an API Marketplace platform … working closely with product, engineering and business stakeholders. This is a great opportunity for an architect with strong API, cloud-native and Google Cloud Platform (GCP) experience to have a genuine influence on enterprise technology direction. Key Responsibilities Own and drive architectural decisions across the API Marketplace platform. ...

Software Engineer (Digital)

Hiring Organisation
Jobleads-UK
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 ...

Integration Engineering Manager

Hiring Organisation
Jobleads-UK
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, UK
Employment Type
Full-time
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 Full Stack Engineer - Vialto Rewards -

Hiring Organisation
Vialto Partners
Location
London, UK
Employment Type
Full-time
news in the industry. You can also follow us on Linkedin and Instagram. Role Summary 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 ...

Boomi Architect

Hiring Organisation
Syntax Consultancy Ltd
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£500/day 500/day (Outside IR35)
. Start ASAP during Summer 2026. Key skills, experience + tasks will include: Boomi Solution Architect with a strong focus on Boomi/iPaaS, API Management, Event Streaming, integration architecture, governance + technical leadership. Integration Adoption & Project Onboarding - architecture engagement + onboarding of priority projects onto the strategic integration … platform (e.g. SDEC, S4H, DWIT). Production of project-specific integration designs aligned to approved iPaaS, API and Streaming patterns. Completion of architecture assurance reviews and design recommendations for onboarding projects. Support projects through technical discovery, design and implementation phases. Reusable Integration Asset Library: design ...

Senior Software Engineer Engineering · London · On-site

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
Terra — from upstream data suppliers (wearables, health apps, sensors) into our unified schema, and out to downstream developers and AI consumers via our REST API, Streaming API, and webhooks. This is not a maintenance role. You will build new data connectors, scale real-time streaming pipelines, harden … authentication layer, and design the systems that handle millions of API calls per day. You will work across the entire stack — from low-level data ingestion to developer-facing API surfaces. You will ship fast, iterate through feedback loops, and think in first principles. ...

Senior Software Development Engineer, AdTech

Hiring Organisation
Jobleads-UK
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 ...

Staff Software Engineer

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
well as achieving our carbon net-zero goals. As an engineer on this project, you will collaborate with Product Managers and partners to design, develop and maintain enterprise scale software systems and tools. As part of a global team working on a global product, you will lead … systems. Passionate about mentoring and coaching engineers across both technical and soft skills. Product-centric mentality with the ability to understand business needs and design scalable, resilient systems and solutions. Strong empathy and curiosity to create exceptional user experiences. Self-starter with excellent communication skills, adept at handling ambiguity ...

Senior Software Development Engineer, AdTech

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

Senior Software Development Engineer, AdTech

Hiring Organisation
Jobleads-UK
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 ...

Software Engineer /Tech Lead - Web Platforms - Technology Consulting

Hiring Organisation
Business Integration Partners
Location
London, UK
Employment Type
Full-time
cloud, data, AI and emerging technologies.We are looking for a Technical Lead – Java & Web Platforms to join our growing xTech team and lead the design and delivery of complex, business-critical digital platforms for major UK and international clients.The roleThis is a hands-on technical leadership role combining software … engineering, solution design, team leadership and client engagement.You will provide technical direction to multidisciplinary engineering teams across back-end, front-end, DevOps and QA, while remaining close to the code and day-to-day delivery.Working across the full software delivery lifecycle, you will help shape scalable, secure and maintainable ...

Lead Software Engineer - GLCM Postings

Hiring Organisation
Hackajob Ltd
Location
Bournemouth, Dorset, South West, United Kingdom
Employment Type
Permanent
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 ...

Senior Java Backend Engineer IRC299953

Hiring Organisation
Jobleads-UK
Location
Glasgow, Scotland, United Kingdom
Gradle, Java, Kafka, REST APIs, Spring Boot We’re looking for an experienced Backend Engineer to design and build robust, scalable microservices. You’ll work across the full backend stack — from API design through to production-grade integration testing — using modern Java and Spring technologies. Mobility: Comfortable … Spring Boot 3 Proven experience building and maintaining microservices architectures Practical experience with Kafka (producers, consumers, event-driven patterns) Strong understanding of REST API design best practices Proficiency with Gradle for build management Familiarity with MapStruct and Feign Working knowledge of domain-driven design (DDD) patterns ...

Senior Technical Architect

Hiring Organisation
Jobleads-UK
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 Recruitment
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
£550 - £600 per day + Outside IR35
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 ...

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 ...

Pre-Sales Senior Engineer

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
Data, AI, and real-time decision-making we turn energy complexity into growth opportunities for our partners. By combining predictive algorithms with human-centred design, the company makes clean energy dependable and affordable. With teams across Europe, North America, Asia and Australia, and a joint venture with Mitsubishi Corporation … services. You move faster than a traditional sprint by using AI to handle the "heavy lifting" of boilerplate and logic generation. Technical Asset Development: Design, build, and maintain reusable mock services in Node.js/TypeScript. You’ll implement contract-first APIs (REST/GraphQL), manage AWS deployments (API ...

Full-Stack Engineer (Frontend)

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
culture, and what the company becomes. The Role This role reports to our Head of B2B Product, James. Working with him and our product, design, mobile, and machine-learning teams, you'll design and build the web experiences that redefine how brands and retailers serve their shoppers. … stay fully accountable for what you ship. What You'll Own Full-stack delivery end-to-end. Own substantial features from product conversation through design, implementation, and iteration in production. Most of the weight sits in the frontend, but you go as far down the stack as the feature ...

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 Platform Engineer

Hiring Organisation
Jobleads-UK
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

Hiring Organisation
Jobleads-UK
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 ...