26 to 50 of 138 API Design Jobs in London

Contribute to the development of our next-generation platform channels. Partner on the delivery of new products while continuously maintaining and improving existing ones.Architecture & Design: Collaborate with team members and engineering leaders to design new services and components utilizing our internal Request for Comments (RFC) process.End … Experience with Micro Frontends (MFEs) is a major plus.DevOps & Cloud: Hands-on experience with Docker, Kubernetes, Terraform, and AWS.Foundations: Strong understanding of system architecture, API design, scalable service integration, Linux systems, and Git version control.Core Soft Skills:Strong knowledge of basic algorithms, object-oriented/functional design ...

course‐correct proactively.RequiredTechnology:15+ years of progressive software engineering; 5+ years leading AI‐native solutions at enterprise scale.Hands‐on with LLMs and agentic frameworks; design and deploy AI systems that augment SDLC (requirements coding testing ops).Tooling & Platforms (practitioner proficiency):Claude Code (Anthropic) for secure, context‐rich code assistance … traceability.NotebookLM/Gemini for research workflows where permitted; govern enterprise knowledge ingestion.Architecture & Integration: Distributed systems, microservices, cloud‐native (Azure/AWS/GCP); secure API design (REST/GraphQL).MLOps & AIOps: CI/CD for AI, model lifecycle (eval, versioning, rollout/rollback), guardrails, telemetry, drift monitoring, prompt ...

Spring Boot background to support customer-specific delivery workstreams and wider digital transformation projects.The role requires hands-on architecture experience across modern service design, integration, cloud-hosted platforms and delivery governance. The successful candidate will help shape robust, maintainable and scalable services, working closely with engineering teams, delivery leads …/Spring Boot services and supporting platform components.Produce high-quality architecture artefacts including HLDs, LLDs, roadmaps, integration patterns, sequence diagrams and data models.Lead technical design governance, ensuring alignment with enterprise architecture principles, GDS Service Standard and delivery best practice.Provide technical assurance across delivery teams, suppliers and stakeholders.Own and articulate ...

helping shape modern platforms that leverage Agentic AI, workflow orchestration, and intelligent automation to solve complex business challenges. What You'll Do Lead the design and delivery of scalable Java 17+/Spring Boot microservices Own architecture decisions, system design, and engineering standards Design resilient, high-performance … adoption of AI engineering tools including GitHub Copilot, Cursor, and Claude Code Deliver AI-powered features using LLMs, RAG, semantic search, and intelligent automation Design workflow orchestration solutions using Camunda or similar BPM platforms Lead the implementation of Agentic AI capabilities, autonomous workflows, and AI-driven decision making Drive ...

microservices using Java or Python within large-scale, consumer-facing environments. You will have deep expertise in modern software architecture, event-driven systems, API design, cloud-native development, CI/CD, automated testing practices, and Agile engineering methodologies. Strong experience with relational databases such as MySQL and PostgreSQL … exposure to Scala or an interest in working with it will be viewed favourably. Additional experience with Infrastructure as Code, containerisation, complex third-party API integrations, e-commerce platforms, or applying AI technologies to improve engineering productivity would also be beneficial.The technology stack includes Java, Python, TypeScript, React, Scala ...

Java.Design and develop well-structured APIs and integrations.Build reusable services, APIs and components that enable other teams to deliver consistently and reduce duplication.Contribute to API design standards, documentation and versioning across services.Deliver complete end-to-end features by connecting backend services and data models with responsive web interfaces.Use … software engineering context.Event-driven architecture and messaging or streaming technologies.Experience with frameworks such as Spring Boot, Quarkus, Micronaut or Ktor.GraphQL or comparable API technologies.Cloud platforms such as AWS, Azure or GCP.Containerisation and orchestration using Docker and Kubernetes.NoSQL, caching or distributed data technologies.Experience choosing between relational, NoSQL and other persistence ...

agile delivery methodology to ensure timely and high-quality delivery of software applications.Technical Ownership: Take technical ownership of a product or software solution, covering design, estimation, shaping, and user story/requirement creation.Solution Documentation: Document solutions, including architecture, configuration, release, and support handover.Stakeholder Collaboration: Collaborate and liaise with other … coding best practices and modern architectural patterns, including microservices and message-driven architectures.Non-Functional Requirements: Experience developing applications with non-functional requirements in mind.Application Design: Experience in application/digital services design.Software Engineering Practices: Proficiency in software engineering practices like code reviews, CI/CD pipelines, and SOLID/ ...

insurers alike. Ideal for a candidate who is driven to succeed, take ownership and pride in delivering exceptional levels of customer service. Key Accountabilities Design, develop, test, and maintain Python applications, scripts, and services Build and maintain APIs and integrations with third-party systems and internal platforms Write clean … technical solutions Participate in code reviews, sprint planning, and agile ceremonies Troubleshoot, debug, and resolve production issues in a timely manner Contribute to the design and optimisation of data pipelines and database interactions Support CI/CD pipeline development and deployment automation Write and maintain unit, integration, and regression ...

engineering role for a developer who is deeply enthusiastic about the intersection of decentralized technologies and institutional finance.The successful candidate will contribute to the design, development, and deployment of Web3-native components and integrations that power Citi's digital asset infrastructure — spanning tokenization, smart contracts, on-chain settlement … event-driven architectures to handle on-chain events, transaction lifecycle management, and blockchain state synchronizationCollaborate with architects and senior engineers to contribute to the design of scalable, secure, and resilient Web3 infrastructureParticipate in code reviews, providing and receiving constructive technical feedback to maintain high engineering standardsSupport the integration ...

platform is built to last and built to scale.Drive Scalability & Reliability. Lead the engineering effort to make RoD elastically scalable and enterprise-grade reliable. Design for high availability, graceful degradation, and zero-downtime deployments. Define SLOs, own the SRE practice for the platform, and be accountable when things need … must be fully understood at all times. You will set the standard and ensure the team can operate with confidence.Establish End-to-End Testing. Design and champion a robust E2E testing strategy across the platform. From contract testing at service boundaries to full integration and regression suites, you will ...

Ireland providing specialist services to a wide range of blue-chip clients. The role We are seeking technical polyglots who enjoy both technical architectural design, hands-on coding and peer reviews, though also like the idea of the equally important social/client-facing aspect of the role. … development architecture as well as supporting business analysts and product owners in planning and story-mapping for new development. You will act as technical design authority (TDA) for delivery of technical stories and produce technical documentation artefacts to support the delivery process. Main Responsibilities Duties will include: The design ...

product proposals grounded in customer data, SME input, and market context. Present options with explicit tradeoffs to support executive decision-making. Ensure all product design complies with applicable regulatory requirements across immigration, tax, social security, and posted-worker obligations. Coordinate with legal and compliance leads on language, logic … platform. Identify and resolve data quality issues in coordination with engineering. Manage vendor relationships relevant to the Business Travel product, including travel data providers, API partnerships, and compliance data sources. Conduct data analysis to inform product decisions, including API response analysis, integration data validation, and client usage pattern ...

deliver the roadmap for horizontal platform capabilities serving all private markets asset classes — including core data services, cross-fund analytics, workflow automation, and API infrastructure.Lead initiatives in AI/ML-enabled product features, including document extraction (e.g., fund documents, LP agreements, investment memos), NLP-powered search, and intelligent alert … investor reporting cycles.Demonstrated experience owning platform-level or infrastructure product workstreams with high technical complexity.Familiarity with data architecture concepts: data modeling, ETL pipelines, API design, and event-driven systems.Experience with agile development methodologies; strong proficiency with product management tools (Jira, Confluence, Productboard, or similar).Exceptional analytical, communication ...

heart of their core engineering capability.This isn't a purely strategic seat. You'll have genuine technical authority over a business-critical API platform while staying close to the engineering, partnering with skilled squads to solve complex distributed systems challenges at scale.Key Responsibilities:Set the technical direction … large-scale API platform across both synchronous and event-driven servicesLead architectural design across a modern, cloud-native stackDrive continuous improvement across security, observability, performance, and long-term maintainabilityMentor and develop engineers and technical leads across multiple teamsWork closely with Product and Delivery leadership to keep engineering strategy ...

applications while collaborating with architects, engineers and stakeholders to deliver innovative digital solutions. The Role As a Senior Software Engineer, you'll lead the design and development of modern cloud-native applications, working closely with clients to understand business requirements and translate them into robust technical solutions. … contribute to solution design, mentor other engineers, promote engineering best practices, and help shape scalable, resilient platforms built on Microsoft Azure. What You'll Be Doing Design, develop and deliver modern cloud-native applications. Build scalable, secure and resilient event-driven solutions. Develop production-quality software using .NET ...

accordingly.The defining challenge of this role is composability: a marketing site that marketers, and increasingly AI agents, can build pages with, without breaking design, performance or SEO.You can expect to:Build, scale and evolve our section library: the Astro components, Sanity schemas and design tokens that … compose marketing pages consistently and accessibly.Own the content model. Design schemas that resist misuse, so an editor, or an agent, can build a page that is correct by construction rather than correct by review.Take Figma component specs all the way to production: responsive across mobile, tablet and desktop, accessible ...

team you'll be working with:We are looking for a Solution Architect to help our clients design and deliver modern, scalable and secure digital solutions, primarily on Microsoft technologies.You will combine architecture leadership with client-facing consulting. That means working directly with stakeholders to understand their goals, shaping … technical options and trade-offs, and guiding delivery teams to implement the design safely.This role suits someone who enjoys turning ambiguity into clear decisions, can explain technology, and is happy getting close to the code when needed.What you'll be doing:Discovery and stakeholder engagementLead workshops to clarify business ...

role in shaping the future technology landscape supporting advisers and clients across the organisation. The Role As Engineering Lead, you'll own the design, development, integration and operation of the firm's financial planning platform, ensuring it remains scalable, secure and fit for future growth. You'll provide technical … senior technical authority for the financial planning domain. Define and maintain engineering standards covering code quality, documentation, testing and release management. Lead architecture and design decisions, ensuring scalability, maintainability and security. Conduct technical design reviews and provide expert guidance across engineering teams. Balance delivery objectives with technical debt ...

Senior Engineering Manager to lead the Loan Portfolio Mitigation Application (IRIS). The successful candidate will lead a team of software developers, overseeing the design, development, and implementation of sophisticated credit risk hedge decision systems. This leadership role requires a deep understanding of financial markets, quantitative methodologies, robust software … grade solutions at scale. The ideal candidate is a practitioner-leader who does not just direct from the sidelines, but actively engages in technical design, architectural decision-making, and hands-on development. You will serve as the definitive technology authority for IRIS, owning end-to-end solutioning from requirements ...

improve transparency within the firm and across our broad community of investors and portfolio companies. BXTI is nimble and entrepreneurial – our open, iterative design processes and rapid pace of development mean that everyone on the team has the opportunity to make an impact from day one. We are problem … with proficiency in C#, JavaScript (React and/or Angular), Typescript, databases (relational and/or NoSQL), and cloud technologies, preferably AWS.Experience with RESTful API design, development, and scalable microservice architecturesAbility to develop scalable, secure, and maintainable code, with a strong background in object-oriented programmingExcellent problem-solving ...

reliability, and performance of our applications.Design and implement monitoring, alerting, and incident response systems.Collaborate with application software engineers (as needed) to guide their design and ensure it scales for what Carta needs in the long run.Act as an agent of change and push boundaries to incrementally improve our systems … secure, reliable, scalable and performant infrastructure to Carta’s customers and developers.We are Software and Infrastructure Engineers who specialize in cloud computing, networking, systems design and architecture, storage, real time data telemetry, associated automation, tooling and processes. We possess a breadth and depth of knowledge about Carta’s infrastructure ...

Java, Spring Boot, Hibernate, and JPA.Strong proficiency in front-end technologies: HTML5, CSS3, JavaScript, and frameworks like React, Angular, or Vue.js.Experience with RESTful API design and implementation.Familiarity with database technologies (SQL and NoSQL, such as MySQL, PostgreSQL, MongoDB).Knowledge of version control systems (Git preferred).Experience with ...

will coordinate with the rest of the team working on different layers of the infrastructure. Therefore, a commitment to collaborative problem solving, sophisticated design, and quality product is important. Responsibilities Working in a team of Front-End engineers Writing clear & concise code Working closely with Back-End engineers Participate … architecture design code reviews API design with the Back-End engineers and other team members to establish more functional, cohesive code Create, maintain documentation while implementing the best coding practices standards Hands-on approach Participation in sprint rituals What you’ll need 6+ years experience developing large ...

Sufficient depth in fraud prevention, abuse detection, rate limiting, or bot protection to guide architectural decisions across a complex, multi-layered fraud stack.Distributed systems design: Proven experience designing, building, and operating scalable, highly available distributed systems in a cloud-native environment.Modern tech stack experience: Demonstrable experience with cloud platforms … preferably AWS), containerisation (Docker, Kubernetes), and API design (gRPC, REST).Database expertise: Hands-on experience with both relational and NoSQL databases.A people-first approach: Deep commitment to the growth and well-being of your team, with proven experience in coaching, mentorship, and performance management.Commercial and data fluency: Comfort ...

engineering and delivery, shaping how apps, services, and systems come together. It’s a varied role that mixes hands-on coding with architectural design and technical leadership. You’ll design and build modern environments, integrate multiple SaaS platforms, and help set the standards for how things are done … code using Terraform and CloudFormation• Docker and Kubernetes• Automation and CI/CD pipelines• GitHub and GitHub ActionsSoftware and Frameworks• React, Node, Next.js, Python• API design and integration• RESTful services and automationData and Platforms• Salesforce• Google Workspace• Atlassian tools such as Jira and Confluence• Databases including DynamoDB, MongoDB ...