1 to 25 of 242 API Design Jobs in London

API Marketplace Solution Architect

Location
Greater London, England, United Kingdom
London, United Kingdom | Posted on 07/31/2026 Job 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 … 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 ...

Software Architect

Location
Greater London, England, United Kingdom
2026. The application happens there, not on DevConnect.Apply on Jobicy## DescriptionJob Requisition ID #26WD94957Position Overview At Autodesk, we are pioneers in 3D design, engineering, and entertainment software, building tools that empower some of the most creative minds on the planet to solve real-world problems. Recognized by Fortune, Forbes … services around it. Data is the domain, but the role is fundamentally one of cloud and services architecture — APIs, service contracts, integrations, distributed-systems design, and the connected data model that ties them together — spanning multiple teams. It is not a data-warehouse or analytics-specialist role. ...

Senior Manager, Mobile Engineering

Location
Greater London, England, United Kingdom
engineering execution, platform strategy, operational excellence, and talent development, ensuring teams deliver reliable, scalable, and high-quality mobile experiences. Working closely with Product, Design, Architecture, Security, Quality, and Operations partners, this leader will help shape the future of Expedia's mobile ecosystem, driving engineering best practices, modern mobile architecture … engineering teams delivering reliable, scalable native applications and shared mobile platform capabilities across multiple product domains. Set technical direction for mobile architecture, including system design, low-level design, API design, data modeling, integration patterns, and maintainable implementation practices across iOS and Android. Build and develop ...

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 ...

Senior Engineering Manager — Hotels.com Technology

Location
Greater London, England, United Kingdom
support to do their best work. Join us and build for travelers everywhere. Expedia Group brands power global travel for everyone, everywhere. We design cutting-edge tech to make travel smoother and more memorable, and we create groundbreaking solutions for our partners. Our diverse, vibrant, and welcoming community … loyalty, app and web experiences, and the platform capabilities underneath them. You will own technical direction and delivery for your team, drive system and API design for performance-critical, high-traffic customer-facing services, and partner closely with Product, Design, Data, Marketing, and Platform teams in small ...

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 ...

Principal Architect — Identity, Data Modeling, and Platform APIs

Location
Greater London, England, United Kingdom
strategic global solutions. Leverage your advanced architecture capabilities and collaborate with colleagues across the organization to drive best‐in‐class outcomes. You will design the data and API foundations that connect identity, authority, ownership, and permission to workload deployment on IaaS platforms and hypervisors. This is a senior … individual contributor role, focused on rigorous data modeling, software and API design, and identity architectures in a large, regulated financial environment. You will define canonical models and service contracts, ensure designs meet regulatory and control requirements, and partner closely with platform, engineering, and development teams. Job responsibilities Defines ...

Microsoft Full Stack Senior Developer (Manager)

Location
Greater London, England, United Kingdom
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 … strategy and solution shaping through engineering delivery, transition to live service and ongoing optimisation In our team, you will: Engineering and architecture Lead 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 Python Engineer

Location
Greater London, England, United Kingdom
consultancy London, UK Job Title Senior Python Engineer Job Title Senior Python Engineer Job Description We're looking for a Senior Python Engineer to design, build, and scale the backend systems that power our products. You'll own services end to end — from architecture and API design through to deployment and monitoring — and work closely with product, data, and DevOps teams. Key responsibilities: Design, develop, and maintain scalable, high-performance backend services and APIs in Python Lead technical design discussions and make sound architectural decisions Write clean, well-tested, maintainable code and champion engineering ...

Senior Platform Engineer

Hiring Organisation
WTW
Location
London, 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 … 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 ...

Software Development Engineer II

Hiring Organisation
Expedia
Location
London, England, United Kingdom
platform, adding conversational analytics, agents, and self-service products alongside the dashboards people use today. We use AI tools and agents every day to design, code, and ship, and we work in short cycles: build something, put it in front of users, and turn what works into capabilities others … want someone who gets things done and cares about what to build as much as how to build it.In this role, you will:Design, develop, test, and maintain reliable software solutions for analytics products, contributing across the full software development lifecycle.Apply system design, low-level design, API ...

Software Development Engineer II - Analytics Products

Location
Greater London, England, United Kingdom
platform, adding conversational analytics, agents, and self-service products alongside the dashboards people use today. We use AI tools and agents every day to design, code, and ship, and we work in short cycles: build something, put it in front of users, and turn what works into capabilities others … want someone who gets things done and cares about what to build as much as how to build it. In this role, you will: Design, develop, test, and maintain reliable software solutions for analytics products, contributing across the full software development lifecycle. Apply system design, low-level design ...

Software Development Engineer II - Analytics Products

Location
City of Westminster, England, United Kingdom
platform, adding conversational analytics, agents, and self-service products alongside the dashboards people use today. We use AI tools and agents every day to design, code, and ship, and we work in short cycles: build something, put it in front of users, and turn what works into capabilities others … want someone who gets things done and cares about what to build as much as how to build it. In this role, you will: Design, develop, test, and maintain reliable software solutions for analytics products, contributing across the full software development lifecycle. Apply system design, low-level design ...

Product Manager

Location
Greater London, England, United Kingdom
Partner and merchant satisfaction - Partner satisfaction/NPS; support volume; Strengthens retention and makes the platform easier to grow. Key Skills, experience and Competencies API Design - Expertise in understanding API design, reverse engineering, and developing comprehensive requirements for API specifications and solutions. Stakeholder Management - Experience ...

Core Platform Developer

Location
Greater London, England, United Kingdom
DeveloperApply: London, United Kingdom: Full time: Posted 11 Days Ago: JR100464## Job Description:**Role Overview**We are seeking a Core Platform Developer to help design and build shared engineering foundations used across the firm. This role is focused on backend and platform capabilities that improve how internal teams build … patterns, and increase the reliability of internal systems. This person should be comfortable working across multiple areas of the stack, from service frameworks and API enablement to observability, governance, and developer workflows. This is a high-ownership role within a global, fast-moving engineering environment.**Key Responsibilities*** Design ...

Software Engineer, General

Location
Greater London, England, United Kingdom
solid engineer with 2-4 years of experience building backend systems and platform infrastructure. You write clean, well-abstracted code with proper design patterns and comprehensive test coverage. You're comfortable working on both the Compute Platform (multi-cloud orchestration, resource management) and Inference Platform (model serving, autoscaling) under … leads Implement features for multi-cloud orchestration, resource scheduling, model deployment pipelines, and autoscaling systems Write well-maintained, production-grade code with proper abstractions, design patterns, and comprehensive test coverage Contribute to low-level design (LLD) including service APIs, database schema design, data models, and component interactions ...

Backend Developer (Python)

Location
Greater London, England, United Kingdom
APIs and services that handle millions of requests daily.This role offers the opportunity to work on challenging problems including distributed systems, data processing, and API design. You'll collaborate with frontend engineers, data scientists, and infrastructure teams to deliver reliable, efficient backend solutions. Key Responsibilities Develop and maintain Python … based backend services and APIs Design and implement database schemas and data models Build scalable microservices architecture Integrate with third-party services and APIs Optimize application performance and database queries Write comprehensive tests and documentation Participate in code reviews and architectural discussions Collaborate with frontend teams on API ...

Customer Engagement Manager

Location
Greater London, England, United Kingdom
organizational readiness—not just technical implementation Translate business objectives into implementation strategies and communicate technical constraints in business language executives understand Technical Solution Design & Architecture Guidance Lead or co-lead design workshops with customer technical teams to architect end-to-end solutions: integration flows, data migration strategies, workflow … design Design integrations between Rocketlane and enterprise systems (NetSuite, Salesforce, Workday, SAP, HRMS, CRMs, data warehouses) Evaluate integration approaches and make build-vs-buy recommendations: native connectors, iPaaS platforms (Workato, Boomi), custom API development Review and validate solution designs created by Solution Architects; push back when designs ...

Software Development Engineer III

Location
Greater London, England, United Kingdom
play a pivotal role in shaping our technical domain to power all Expedia Group’s brands and product lines. In this role, you will: Design and implement scalable, robust, and maintainable systems and services across multiple domains, with a focus on reliability and performance. Develop complex application logic, APIs … years of relevant professional experience. Strong software engineering fundamentals—data structures, and algorithms in Java or Kotlin, with familiarity across the JVM stack, system design, and distributed systems, and can understand highly complex systems, design moderately complex services, and guide integrations across teams within the business unit. Building ...

Manager - AI Tech Transformation - TC - FS

Location
Greater London, England, United Kingdom
help to build a better working world. The opportunity We are seeking a Manager, AI Architect specializing in generative AI to lead the design and delivery of GenAI solutions for our clients. This is a hands‐on delivery and technical management role: you will own the architecture … your solutions run reliably in production. You will work closely with client teams and communicate technical decisions clearly to project stakeholders. Your key responsibilities Design and Delivery of Engagements Own the architecture and technical delivery of a GenAI solution area or workstream, from design through production rollout. Lead ...

MuleSoft Developer

Location
Greater London, England, United Kingdom
Solution Architects and the Mulesoft team to implement MuleSoft's AnyPoint platform-based Integrations in order to support business requirements. The MuleSoft Developer will design, build, and maintain integrations for multiple on premises and cloud systems and must be capable of understanding business requirements, working with various business … Develop Integration Solutions Using MuleSoft Software Provide technical expertise in large, complex environments. Individual will be responsible to provide: Detailed requirements analysis Software/API design Development of API’s Development and execution of Testing Strategies Deployment of API’s using the companies CI/ ...

Senior Software Engineer II

Location
Greater London, England, United Kingdom
scalable, production-grade AI systems in a regulated financial services environment. Location: UKor EU Hybrid/Remote: Remote (Ocasionaltravel required) Responsibilities AI Solution Development Design, build, and deploy AI/ML models and intelligent applications across SBS platforms Develop solutions leveraging: Machine Learning (ML) Natural Language Processing (NLP) Generative … capabilities into core banking, payments, and digital platforms Work closely with Product Managers, Architects, and Developers to embed AI into customer-facing solutions Support API development and microservices architecture for AI-driven features Data Engineering Collaboration Partner with data engineers to ensure data quality, availability, and pipeline integrity Work ...

Product Manager – Global Card Issuing Platform (BaaS)

Location
Greater London, England, United Kingdom
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 ...

Back-End Engineer Trading: Blockchain.com in London

Location
Greater London, England, United Kingdom
work covers backend services for order management, market data processing, and trade lifecycle systems. The position requires professional experience building backend services, REST API design, SQL knowledge, and experience integrating internal or third-party services. Kotlin and Python are the preferred backend languages. The employer does not state … streams Work with product, frontend, and trading teams Contribute to architecture and technical decisions Technical Qualifications The qualification profile includes backend service development, REST API design, SQL, and internal or third-party service integration. Performance fundamentals, problem-solving, and communication skills are also required. WebSockets, event-driven systems ...

Junior Solutions Architect: Cloud & API Design

Location
Greater London, England, United Kingdom
real initiatives and develop hands-on expertise. You will collaborate with chief architects and engineers, translate requirements into technical specifications, and contribute to API design, data flows, and cloud deployment planning across AWS, Azure, and Google Cloud. #J-18808-Ljbffr ...