76 to 100 of 235 API Design Jobs in London

Formal training or certification on API Management Platform concepts and proficient advanced experience Hands-on practical experience delivering system design, application development, testing, and operational stability Advanced in one or more programming language(s) - Golang or LUA Script Proficiency in automation and continuous delivery methods In-depth knowledge … financial services industry and their IT systems Practical cloud native experience Professional experience in API management technology e.g APIGEE, Kong, Mulesoft Strong understand of OpenAPI Specification (OAS) for RESTful APIs DevOps (CICD, Kubernetes, Terraform) Required qualifications, capabilities, and skills · Programming languages: Advanced proficiency in one or more programming languages ...

platform APIs and SDKs, including client interfaces, compatibility rules, documentation, and examples. Build FastAPI services for enforcement decisions, evidence, policies, and red-team results. Design authentication, sessions, API keys, authorisation, and rigorous multi-tenant isolation. Build data and event interfaces, real-time streams, and a tamper-evident audit … ledger. Create customer onboarding, policy integration, and operator dashboard workflows. Own testing and deployment across API compatibility, browser smoke tests, Cloud Run, and Cloud SQL. What we're looking for A product-minded platform engineer who makes complex systems clear and predictable and takes ownership from the data model ...

landscape. Set direction, make and record sound architectural decisions, and weigh trade-offs clearly. Shape how front ends and back ends fit together, including API design, contracts, integration patterns and the boundaries between teams and services. Design for scale. Make sure our systems stay fast, available … explain and defend your decisions to engineers and senior stakeholders, and manage technical debt and dependencies over time. Solid understanding of sync and async design patterns for enterprise integration and data, which are crucial for reliable, resilient, high-performance systems. Experience with Agile and XP practices, and with helping ...

will develop our suite of security-focused cloud services and infrastructure. You’ll have the opportunity to learn, grow, and directly contribute to the design and implementation of scalable, reliable, and secure systems. You’ll collaborate closely with the rest of our engineering team to design APIs, build … ideal for an early-career engineer with a few years of industry experience who is interested in a high-growth environment. Key Responsibilities Design, build, and maintain cloud infrastructure and cloud-based services and APIs to support the functionality and scalability of our platform Contribute to the development ...

building secure, reliable backend services that allow AI agents, merchants, payment platforms, and risk systems to work together in real time. AI Agent Integrations Design and build secure checkout and payment APIs that AI agents can invoke reliably and deterministically, including support for concepts such … transaction evidence, and downstream reporting data. Integrate agentic commerce capabilities with global payment platforms, gateways, checkout, tokenization, authentication, fraud, reporting, and merchant-facing systems. API & SDK Development Build merchant-facing APIs, SDKs, documentation, sample flows, sandbox experiences, and developer tools that make agentic commerce easier to adopt. Design ...

cloud-native adoption, and AI-assisted development practices. Position As Lead Application Architect, you'll take ownership of application-level architecture and low-level design, helping to establish development standards and modern engineering practices across the organisation. Key responsibilities include: Producing component-level and code-level designs and detailed … Level Design (LLD) documentation Translating high-level architectural designs into clear implementation plans for development teams Creating and maintaining Architecture Decision Records (ADRs) and facilitating design reviews Defining and embedding engineering standards, coding principles, and security best practices Driving adoption of AI-assisted development tools across the software ...

SDLC towards a more agentic one, you will use AI-assisted tools to increase technical leverage, improve engineering workflows and raise the quality of design, code review, testing and documentation - always with rigorous human judgement. Key Responsibilities Technical Direction : Lead the backend technical effort, establish architectural direction, and guide … team through complex design choices, refactoring priorities and engineering trade-offs. NestJS Architecture : Design and evolve a clean, modular NestJS architecture with clear module boundaries, dependency management, testability and maintainable conventions. Typed APIs and Contracts : Design well-typed, version-aware APIs and integration contracts that are clear ...

services include Consulting, System Integration, and Digital Services. Role overview: As a Graduate Software Integration Engineer within the Integration practice, you will support the design and delivery of integration solutions across enterprise environments, contributing to both client engagements and internal capability development. You will gain hands‐on experience … MuleSoft, WebMethods, Talend, Tibco, and Dell Boomi. We are hiring for Summer/Autumn 2027! Responsibilities: Support the delivery of high-quality Integration Design and Development consultancy across client projects Contribute to integration best practices, including API design, data transformation, and system interoperability Work alongside senior consultants ...

infrastructure at massive scale, and help define how self-improving AI agents operate real-world AI infrastructure. Remote based in the UK Responsibilities Design and build production AI agent systems that diagnose, investigate, and remediate infrastructure issues across one of the world’s largest GPU fleets. Build the distributed … production into reliable, reviewed software and automation. Requirements 5+ years of experience building production backend systems, distributed systems, or infrastructure platforms. Strong systems design skills and experience owning significant systems from design through production. Depth in at least one of the following: AI agent systems, orchestration, tool ...

want to be. Be Selective To Be Effective. Be Highly Aligned, Loosely Coupled. Disagree Transparently. Build Dream Teams. Who You Are: You'll design and build backend systems powering blockchain infrastructure and staking products across Galaxy — spanning Ethereum-based systems, staking infrastructure (native and liquid), and blockchain data systems … first development environment that increasingly leverages AI‐assisted workflows. Typical time allocation:roughly 60%building systems and features, 20% code review and mentorship, 20% design, architecture, and product collaboration. What You’ll Do: Build and own backend systems Design and build APIs, services, Ethereum data pipelines and indexers ...

shape and build our platform. You will work closely with business stakeholders to turn ideas into well-designed, reliable software, taking features from technical design through to delivery and iteration. This is a technical leadership role in a small, growing team. You will spend most of your time designing … separate, secure and available, so reliability and security are part of the job from day one. Key responsibilities Front-end engineering and product delivery Design, build and improve applications using React and TypeScript. Develop accessible, maintainable front-end experiences using HTML and CSS. Improve front-end performance, reliability ...

workloads Data foundations: pipelines andlakehousepatterns (Microsoft Fabric/OneLake, Databricks, or equivalents), streaming and event-driven integration where the problem demands it Enterprise integration: API design and consumption at scale, including REST, OData,GraphQL, and webhook/event patterns into ERP-class systems What sets candidates apart Classical … delivery on the CTO Office's highest-priority technical projects, end to end Write and review code daily; the role never becomes slideware Design and ship agentic and LLM-based systems to production standard: retrieval at scale, evals, guardrails, security and identity,monitoringand auditability Drop into unfamiliar codebases, stacks ...

core mission capabilities. You'll work as part of empowered, autonomous DevOps teams with regular contact with end-users to flexibly and efficiently understand, design, develop, deploy and maintain applications and services on AWS. You'll be encouraged to identify new ways of solving problems and get to work … help you with them AWS Certification at Associate level eg Solution Architect, Developer or DevOps Expertise in microservices and API design Docker, and container runtime platforms such as Kubernetes, EKS, ECS etc Strong understand of operational concepts on AWS, particularly monitoring and observability, FinOps Utilising CI/ ...

core mission capabilities. You’ll work as part of empowered, autonomous DevOps teams with regular contact with end-users to flexibly and efficiently understand, design, develop, deploy and maintain applications and services on AWS. You’ll be encouraged to identify new ways of solving problems and get to work … help you with them AWS Certification at Associate level eg Solution Architect, Developer or DevOps Expertise in microservices and API design Docker, and container runtime platforms such as Kubernetes, EKS, ECS etc Strong understand of operational concepts on AWS, particularly monitoring and observability, FinOps Utilising CI/ ...

part of a collaborative and forward-thinking team. Key Responsibilities Build impactful GenAI solutions: Within your first year, you will contribute to the design and delivery of our new GenAI platforms, directly impacting the productivity of thousands of developers. Shape our technical direction: You will contribute to the technical … Kubernetes, containers, microservices, and event-driven architectures. Solid architectural understanding: A good grasp of distributed systems, resiliency patterns, scalability, and performance engineering. Data and API proficiency: Knowledge of SQL and NoSQL databases, as well as API design and integration patterns. Strong collaboration skills: The ability to communicate ...

well before any code gets written, with clear communication about the outcomes to be delivered, followed by planning, prototyping when it helps, and a design the team agrees on. As technical lead of an R&D team, you'll work closely with a Product Manager on initiatives, improvements … time. You plan, size and hand out the work, and keep the team unblocked while it ships. Security, scalability, availability and performance are design inputs on every initiative, not a hardening phase at the end. You cover tenant isolation, auth, data protection and auditability, because our clients' data ...

scale with us. Your Responsibilities in this Role Own key architecture and implementation decisions for NALA's wallet and Global Accounts foundation Lead design work (RFCs, diagrams, API and system specs) to align on solutions before building Partner with the PM and stakeholders to translate business intent into … generated wallet delegation success rates Help launch Global Accounts into additional markets and kick off our stablecoin card capability Drive engineering quality across API standards, testing strategy, code review bar, and maintainability Manage delivery by breaking down complex work, sequencing milestones, and keeping projects moving end to end Make ...

basis with development team, designers, copy writers and other IT teams. The role develops and presents recommendations from analysis of current solution. Assist in design peer reviews, code peer reviews, build and unit test functional enhancements. Identify areas for code refactoring. Review and contribute to development process and procedures … Defends a recommendation and can confidently support it. Strong organization, communication, and interpersonal skills. Ability to communicate with business and technical audiences and produce design documents suitable for multiple audience types, both client-facing and internal- Must be able to exhibit technical thought leadership and excellent problem solving ability ...

join the team redesigning their client portal. This is a hands-on role for an experienced mid-level or senior Python engineer. You will design and build the APIs and backend workflows behind new portal features and own your work through to production. You will work in a collaborative … designing maintainable REST APIs, with solid data modelling and relational database practice Good knowledge of authentication, authorisation, single sign-on patterns and secure API design A testing mindset and experience working with CI/CD Confidence diagnosing application, database and performance issues in live environments An understanding ...

week in the office located in London. Your Impact: Guide architectural and technical direction across various teams, executing scalable solutions from design through to deployment. Solve intricate technical problems, taking ownership of mission-critical components and establishing standards of excellence. Set and maintain high-quality benchmarks for system architecture … design patterns, testing, reliability, and performance. Collaborate extensively with senior stakeholders across product, data analytics, and growth teams, aligning engineering objectives with strategic business goals. Mentor and grow team members, enhancing their technical and leadership capabilities. Facilitate team effectiveness by clarifying ambiguous challenges, eliminating obstacles, and making sound technical ...

research engineers, product managers, and platform engineers—to deliver scalable, reliable, and low-latency ML solutions. What you’ll own Software and Service Delivery: Design, implement, and deploy software features, backend services, and APIs that operationalize ML models in production (with a focus on backend, API, and service … MLOps Engineer, or similar, with hands-on production experience operating backend services or ML-backed APIs Proven expertise deploying ML models as production services, API design, and service integration Strong Python skills and service/backend engineering experience (ideally in FastAPI/OpenAPI, Flask, Go, or Java) Production ...

This will be an initial 6 month contract (inside IR35) and working predominantly remotely with occasional travel to sites. Position Overview To lead the design and development of modernised Python microservices deployed into Kubernetes, rebuilding existing network data services to be efficient, secure and scalable while guiding the team … engineering best practice. What you'll be doing: Design and develop Python microservices to replace and modernise existing services, preserving known functionality while improving performance and security. Provide technical guidance to the team on service design, code quality and secure development practices. Build highly concurrent services capable ...

including Python and at least one additional production language such as TypeScript or equivalent, version control, testing, CI, and maintainable code, together with SQL, API design, code review and secure coding practices. Hands-on LLM application development, covering tool use, structured outputs, retrieval and agent frameworks, including embeddings ...

Coding Proficiency: Fluency in at least one modern systems or backend language— Go, Java, Python, or C/C++ —with solid fundamentals in concurrency, API design, and asynchronous patterns. Data Modeling & Storage Foundations: Practical experience working with low‐latency key-value stores, distributed databases, or streaming data platforms ...

advance safe, reliable, and effective AI in financial services. As an Applied AI Engineering Lead - Vice President in Markets Operations, you will lead the design and implementation of agentic AI applications that improve operational workflows, controls, productivity, and engineering practices. You will build reusable AI engineering patterns, context management … specialists, and operations stakeholders to identify high‐value opportunities and deliver robust solutions integrated with strategic platforms and operational processes. Job Responsibilities Lead the design, development, and implementation of agentic AI applications that support Markets Operations workflows, controls, exception management, and productivity use cases Define and drive AI engineering ...