19 of 19 API Design Jobs in the City of London

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 ...

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 ...

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, integrate, deploy, and operate software. The ideal candidate is a strong software … 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 ...

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 ...

major advantage. Key Responsibilities Technical Leadership Own the technical roadmap, guide architectural decisions, and ensure engineering excellence across backend services. Python Engineering Design and build robust, secure, and scalable microservices using Python (FastAPI, Django, Flask). System Architecture Lead the design of distributed systems, event-driven architectures … data intelligence. DevOps & Cloud Collaborate on CI/CD pipelines, containerisation (Docker, Kubernetes), and cloud deployments (AWS/GCP/Azure). Data & API Strategy Oversee API design, data modelling, and integration with internal and external financial systems. Security & Compliance Ensure systems meet regulatory, security, and audit ...

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 ...

play a key part in driving the adoption of AI across engineering, leveraging emerging technologies and embedding AI-native workflows to improve how they design, build, and deliver software. This role is predominantly hands-on, with around 2030% of time on technical leadership: architecture, mentoring, and shaping … generated code to our standards for security, reliability, and cost-efficiency (FinOps). These are first-class concerns in agentic pipelines, not afterthoughts. Design, build, and operate software across our platform, applying the same rigour to AI-augmented work as to anything else you ship. Embed deeply with Product ...

services and automation that connect complex infrastructure environments. The wider goal is to remove manual infrastructure processes and replace them with reliable, self-service, API-driven services. You will design and develop integrations across areas including bare-metal compute, networking, storage, cloud and workload platforms. A major part … role will involve building API services around a central CMDB, creating a reliable source of truth that can drive automated provisioning, configuration and infrastructure lifecycle management. Responsibilities will include: Building production-grade services and automation primarily in Python Designing REST APIs and integration layers across infrastructure platforms Developing CMDB ...

driving alignment across various teams with different priorities, ways of working to achieve solution standardisation. You sit at the intersection of business strategy, solution design, and delivery execution, shaping how D365 integrates and evolves globally. You work closely with integration architects, solution architects, developers, engineering/product teams … event‐driven patterns. Review and approve specifications, customisations, and integrations that impact end to end process flows across multiple systems. Facilitate cross‐system design alignment with solution owners (POS, WMS, EDI, middleware, data platform, identity/security), ensuring decisions are understood, documented, and governable. Support environment and build strategy ...

Isaac Squires, Dr Steve Kench, and Dr Sam Cooper. The founders share a mission: to harness engineering, artificial intelligence, and materials science to design the materials of the future. Our vision is to become the world leader at the interface between AI and materials, combining scientific rigour with engineering … Deliver incremental improvements to our product or platform Share early insights to help shape technical and product decisions Month 3 – Take Ownership Lead the design and delivery of an end‐to‐end feature that provides clear customer value Collaborate cross‐functionally with ML and product teams to turn complex ...

include: Engage in all phases of application development, with a focus on coding and debugging in alignment with security standards throughout the entire lifecycle Design, build, and maintain efficient, reusable, and reliable code/APIs to support applications both for web and mobile Collaborate regularly in a cross-functional … version control software such as GIT Knowledge of SOLID principles Knowledge of clean code practices Experience using web service protocols such as Rest, API design for extensibility and integration Experience debugging complex applications Experience with Agile development project management methodologies Database Development in SQL Server or NoSQL Databases ...

Responsibilities Help define and deliver the future vision for attribute reputation services, driving simplification and consolidation where appropriate. Design and develop high-volume, high-availability, low-latency backend services. Enhance and optimise existing applications and services. Support incremental re-architecting initiatives to reduce technical complexity and improve maintainability. Develop … clean, testable and maintainable code using Scala and modern engineering practices. Design, build and maintain secure APIs, databases and applications. Collaborate with Product Owners, Business Analysts, Data Engineers and wider technical teams to deliver effective software solutions. Contribute to service support and operational excellence within a "build ...

Role Overview ICRV are seeking an exceptional Principal Engineer to own the architecture, design and hands‐on delivery of a desktop platform automating and streamlining trading desk workflows. This is a high‐visibility player‐coach role that may evolve to include formal people management. Role Responsibilities … output. Own the technical direction of the ICRV greenfield project, developing high‐performance, scalable, and robust solutions from first principles through to production operation. Design for hard non‐functional requirements: latency and responsiveness budgets as acceptance criteria, crash containment, least‐privilege isolation between sub‐applications. Work effectively with ...

team that executes complex, multi-leg synthetic strategies on behalf of institutional clients.Role OverviewICRV are seeking an exceptional Principal Engineer to own the architecture, design and hands-on delivery of desktop platform automating and streamlining trading desk workflows. This is a high-visibility player-coach role: you will apply … C#/.NET (LTS): back-end services with ASP.NET Core.Experience designing and delivering event-driven, service-oriented back-end systems (message brokers, async workflows, API design) in a production trading environment.Experience building desktop applications that host web content (e.g., Electron, Tauri, or custom .NET host); comfortable with WebSocket ...

heavily backend-biased position but given the size of the team you will be working across the stack when needed Build scalable, performant systems Design and deliver end-to-end features with direct impact on customer value Work with product and ML teams to help translate abstract and complex … software function About you: Strong ability across scalable and performant systems You have a product mindset Statically typed language expertise Experience with API design Low ego and love of engineering Full details are available. Please don't hesitate to reach out for more information. ...

build scalable customer engagement systems across a hybrid London/Dundee environment. The role covers front-end and back-end development, data flows and API design, using React, Node.js, GraphQL and modern databases. You will collaborate with cross-functional teams, optimize data pipelines and explore AI-enabled tooling ...

investigates that data, and the APIs and integrations connecting it with customers’ existing systems. This is a hands-on role for someone comfortable reading API documentation, mapping data flows and working through technical trade-offs with engineers. You’ll take problems from early discovery through to delivery and adoption … functional requirements, including security, compliance and scalability. Own the direction of customer-facing APIs and emerging agent-based capabilities. Contribute to decisions around API design, versioning, backwards compatibility and developer experience. Create clear documentation and examples for technical customers and partners. Lead discovery using customer conversations, product data ...

seeking a technically minded Product Manager to own the data sources, APIs and integrations at the heart of our platform. You will read API documentation, map data flows and work through technical trade-offs with engineers, translating detail into a roadmap that engages both engineering and commercial stakeholders. … lead discovery through to delivery, shaping API design and data ingestion for a range of customer use cases. #J-18808-Ljbffr ...

growing need to track new threats, develop new defences and deploy in a timely and efficient manner. How you can make an impact Design and execute Red Team Operations against iProov’s biometric platform, web apps, APIs, identity flows Strengthen the company’s security posture through offensive security assessments … reduction. Bring insight into all aspects of modern security issues to our products and rapidly developing prototypes for mitigations. Mentor engineers in secure-by-design patterns, client-side security, and secure API design. Work hand-in-hand with developers to propose pragmatic mitigations, remediation plans, and detection logic ...