26 to 50 of 266 API Design Jobs in London

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 ...

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 ...

List of key deliverables/responsibilities Delivery of Complex Engagements Own the architecture and technical delivery of complex GenAI engagements or major workstreams, from design through production rollout. Lead cross-functional delivery teams (architects, engineers, data specialists) across the engagement lifecycle. Ensure solutions are enterprise-grade: scalable, secure, resilient … Architect solutions for high-value insurance use cases (claims intake automation, submission triage, document intelligence, underwriting copilots, policy Q&A, contact-center copilots). Design RAG systems at scale: chunking strategies, embeddings, vector stores, retrieval tuning, and grounding to reduce hallucination. Design multi-agent and tool-calling workflows ...

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 ...

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 is essential in driving our success. Why Join Us? To shape the future … great experience to delight our customers. Our goal is to enhance every traveler's experience and make it better! In this role, you will: Design, develop, and maintain high-throughput, low-latency distributed backend services that deliver efficient, optimal pricing solutions at scale. Implement robust caching mechanisms to enhance ...

great experience to delight our customers. Our goal is to enhance every traveler's experience and make it better! In this role, you will: Design, develop, and maintain high-throughput, low-latency distributed backend services that deliver efficient, optimal pricing solutions at scale. Implement robust caching mechanisms to enhance … application performance, reduce latency, and optimize resource utilization. Participate in system design, API design, and data modeling for scalable, reliable microservices. Contribute to technical documentation, detailed code reviews, and architecture discussions to ensure high-quality solutions. Analyze complex problems, break them down into manageable milestones, and collaborate ...

Build the web platforms and APIs that power Talksign's ecosystem, from developer tools to enterprise dashboards. What you'll do Design and build scalable web applications and APIs Create developer-facing tools and documentation Implement secure authentication and data management Optimize performance and reliability of backend services Contribute … 4+ years of full-stack development experience Strong proficiency in TypeScript, React, and Node.js Experience with cloud platforms (AWS, GCP, or Azure) Understanding of API design and database systems Commitment to code quality and testing Nice to have Experience with real-time communication (WebRTC, WebSockets) Knowledge of accessibility ...

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 ...

/B testing, directly impacting our business results. We collaborate closely with the analytics, product, and engineering teams. In this role, you will: Design, develop, and apply machine learning solutions to real-world personalization, product, and business problems, translating ambiguous opportunities into scalable models, experiments, and production-ready capabilities. … strong attention to measurable impact. Partner closely with engineers, product, and business stakeholders to integrate machine learning solutions into services and workflows, including system design, API design, and data modelling considerations where applicable. Use strong technical judgment to select appropriate methods, validate outcomes, and improve model performance ...

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 ...

work alongside architects, product stakeholders and delivery partners to ship software that brokers and analysts use every day.**Key Responsibilities:*** **Build Across the Stack:** Design, build and ship features end to end, from APIs and services through to responsive, accessible user interfaces.* **Cloud Native Delivery:** Develop and run cloud … usable, performant ways for brokers and analysts.* **AI-Enabled Development:** Build AI-enabled product features using patterns such as retrieval-augmented generation, tool and API integration, evaluation and human-in-the-loop design.* **AI-Assisted Engineering:** Use AI-assisted engineering tools such as Claude Code or Claude Cowork ...

with Account Executives, Customer Success Managers, and Service Delivery to solve complex identity challenges for enterprise customers, leading efforts from the discovery and solution design through to evaluation for prospects and existing customers. You’ll translate technical and business requirements into scalable solutions, lead technical engagements, and ensure customers … Advise on best practices across identity, compliance, fraud, risk and integrations, adapting your approach to different customer contexts and levels of technical depth Strong API expertise (REST, API design, OAuth, API keys, JSON/XML) with the ability to translate complexity into clear, actionable solutions Comfortable ...

pace. Key Responsibilities Backend Engineering Build and maintain APIs, microservices, and data pipelines using Python, Django, Django REST Framework, FastAPI, and related platform tooling. Design service boundaries, API contracts, relational data models, and integration flows for complex property operations. Produce ERDs and other technical diagrams where they make … traces, and alerts that make production behaviour and failures easy to understand. Diagnose and resolve production incidents across services, databases, queues, integrations, and infrastructure. Design for security, resilience, performance, and data integrity across business-critical workflows. Agentic and Spec-Driven Development Partner with product managers, frontend engineers, and quality ...

Full-Stack Software Engineer with strong experience in C#/.NET Core and modern front-end technologies (React, JavaScript/TypeScript, HTML, CSS) to design, develop, and maintain robust APIs and user interfaces for our enterprise applications. The ideal candidate will be passionate about clean code, scalable architecture … high quality products. Exposure to modern AI tools and services (such as GitHub Copilot or APIs from providers like Anthropic) is beneficial. You Will: Design, develop, and maintain RESTful APIs using .NET Core. Work with data from SQL (MS-SQL server) and NoSQL (MongoDb) databases and external APIs. Ensure ...

enterprise and partner ecosystems. The position also plays a key role in shaping industry best practices and representing the organisation externally. Enterprise & Ecosystem Architecture Design and oversee the implementation of enterprise‐wide software architecture, spanning internal platforms, cloud environments, and external partner ecosystems Develop “big picture” architectural frameworks … adherence to security, compliance, regulatory, and quality standards Identify and mitigate long‐term architectural risks (e.g., vendor lock‐in, scalability constraints, regulatory exposure) Technical Design & Solution Development Conduct research, analyse data, gather requirements, and define end‐to‐end solutions Create architectural artefacts representing system functions, integrations, and user interfaces ...

digital platforms with Fullstack capabilities. The lead engineer will set architectural standards for enterprise-grade web applications, drive UI component libraries and design system adherence, establish best practices for API integration and backend services, and mentor development teams across the software delivery lifecycle. Key ResponsibilitiesTechnical Leadership & Core Applications … DevelopmentArchitectural Alignment & System Design: Provide expertise in frontend/fullstack applications programming and ensure application design strictly adheres to the overall enterprise architecture blueprint, security standards, and technology roadmap. Standards & Engineering Governance: Utilize advanced knowledge of system flow to develop and enforce robust standards for UI coding, component ...

digital platforms with Fullstack capabilities**. The lead engineer will set architectural standards for enterprise-grade web applications, drive UI component libraries and design system adherence, establish best practices for API integration and backend services, and mentor development teams across the software delivery lifecycle.# Key Responsibilities## Technical Leadership … Core Applications Development* **Architectural Alignment & System Design:** Provide expertise in frontend/fullstack applications programming and ensure application design strictly adheres to the overall enterprise architecture blueprint, security standards, and technology roadmap.* **Standards & Engineering Governance:** Utilize advanced knowledge of system flow to develop and enforce robust standards ...

that challenge and inspire you. Here's what a typical day might look like: Develop and maintain Symfony-based applications with clean, efficient code Design and implement RESTful APIs using API Platform or FOSRestBundle Build reusable bundles and Symfony components Integrate third-party services and APIs into applications … Optimize application performance and database queries Responsibilities Develop and maintain Symfony-based applications with clean, efficient code Design and implement RESTful APIs using API Platform or FOSRestBundle Build reusable bundles and Symfony components Integrate third-party services and APIs into applications Optimize application performance and database queries Write ...

across the firm to ensure our data products deliver value to our customers and they can be readily maintained and enhanced. This encompasses the design and architecture of logical and physical data models and schemas, data transport mechanisms, metadata management, lineage management, API schema design and enabling … financial information to be accessible to AI agents. What You Will Do Design, develop and maintain the technology-agnostic, business-aligned canonical/conceptual data models for Financial Information, defining class definitions, standards and association semantics. Provide data architecture expertise to all delivery teams to ensure we build data ...

across the firm to ensure our data products deliver value to our customers and they can be readily maintained and enhanced. This encompasses the design and architecture of logical and physical data models and schemas, data transport mechanisms, metadata management, lineage management, API schema design and enabling … financial information to be accessible to AI agents. What You Will Do Design, develop and maintain the technology-agnostic, business-aligned canonical/conceptual data models for Financial Information, defining class definitions, standards and association semantics. Provide data architecture expertise to all delivery teams to ensure we build data ...

Solirius Reply, part of the Reply Group, is a technology consultancy and digital transformation partner that helps organisations solve complex challenges through strategy, design, engineering, and delivery. We work closely with our clients to deliver secure, accessible, user-focused services that evolve with their needs. By combining deep technical … expertise with people-centred design, we create solutions that deliver meaningful, lasting impact. Our consultants partner directly with client teams, embedding into organisations to understand their goals, challenges, and users. This collaborative approach enables us to deliver tailored solutions that drive measurable outcomes across public and private sectors. Past ...

Defence delivery team. This is a versatile, high-impact role designed for funded client delivery: you will build mission-critical web applications and API backends for central MoD programmes, while contributing to low-level system integrations (Kotlin, Android ART, IPC/AIDL) on tactical edge and Situational Awareness … platforms. You will sit at the intersection of modern enterprise software engineering and tactical edge integration, ensuring all code meets MoD Secure by Design (SbD) principles and Def Stan 00-056 safety boundaries. Full-Stack Application Development: Design and build resilient, secure web applications, microservices, and APIs (TypeScript ...

transformation and ensuring data is protected and used ethically. Talan UK & Ireland provides a range of consultancy and outsourcing capabilities including programme management, market design and governance. We also have extensive and award-winning capabilities across cyber security, data privacy and digital transformation. We are IIP Gold accredited … recruiting an ambitious and technically accomplished Solutions Architect to join our Digital business unit as a Principal Consultant. You will lead the design and delivery of scalable, secure, and cloud-native platforms across Energy (including Low Carbon and UK regulatory systems), Financial Services, Public Sector, and Healthcare domains. This ...

will be a hands‐on technical leader who defines direction, raises engineering standards, and delivers measurable product outcomes, all while remaining deeply involved in design and development. This is not a traditional people‐management or delivery‐management role—here, you will write code, architect solutions, lead complex projects … role is perfect for leaders seeking high‐growth, product‐driven environments, who are passionate about distributed systems, and who want to directly influence the design of secure, scalable, and resilient infrastructure while cultivating top engineering talent. What You’ll Do: Architect and design scalable, resilient, high‐performance backend ...

every trading day, across low-latency services, large-scale data pipelines, distributed compute, and the APIs and interfaces on top of them. Key Responsibilities Design, build, and own the firm's risk calculation and exposure aggregation services, from position capture through to delivered risk numbers. Develop real-time … operating production systems, with deep expertise in Python and at least experience in one systems language Strong grounding in distributed systems, concurrency, service design, and API design; you have owned systems in production, not just written code for them. Solid engineering discipline: automated testing, code review ...