26 to 50 of 52 API Design Jobs in Central London

your field and build new products and expend on existing products while working with the team to further improve our SDK document capture experience Design and deliver solutions that will scale with significant volumes, be highly available, performant and resilient. We’re on a rapid growth trajectory and have … designers, product managers, and other engineers to deliver great experiences to our customers and their users, leveraging your strong understanding of the iOS SDK, API design and mobile engineering good practice. Working within the team, prototype and iterate until the solutions are impactful and well-polished, supporting multiple … Proven iOS and Swift Experience: 3+ years of hands-on iOS Swift development experience UI/UX Best Practices: Good understanding of Apple’s design guidelines , mobile user experiences principles, and best practices for building intuitive and responsive interfaces. API Integration: Proven ability to design and integrate More ❯

libraries. Key Responsibilities: Build cloud-based, distributed data solutions. Understand and prioritize investment data needs. Collaborate with users and team members to refine requirements. Design high-performance data ingestion and delivery systems. Technical Skills: 7+ years with Python, Rust is a bonus Strong expertise in distributed systems Experience with … event streaming platforms like Kafka . Familiarity with DevOps , CI/CD , and infrastructure-as-code . API design experience; front-end experience with React is a plus. Cloud experience (especially AWS ) is highly valued. Additional Requirements: Experience working within the data space within a Hedge Fund Environment More ❯

innovation. Strong engineering background with the ability to communicate architectural decisions to both technical and non-technical stakeholders. You create guardrails on scope, technical design, NFRs, and quality-then empower your team to innovate within them. Client- and product-focused mindset, with experience partnering closely with Product Managers and … business teams. You embrace ambiguity, foster collaboration, and promote psychological safety to help teams navigate change. Hands-on knowledge of secure API design, authentication services, and mobile development (Swift/Kotlin, React Native). Exposure to Figma, Vercel, and modern DevOps tools and practices. Experience leading engineering efforts More ❯

seamless user experience ✔ Mentoring junior engineers and shaping best practices across the codebase Tech Stack Highlights: 🔹 Python , FastAPI , React , TypeScript 🔹 Docker, Terraform, AWS 🔹 Strong API design & database architecture Why This Role? → Join a passionate, mission-driven engineering culture → Work on greenfield systems with considerable real-world impact → Excellent More ❯

client are heavily engrained in the Microsoft ecosystem and its key you have a wealth of experience across the following tooling;- Tech : C# Azure API Design and Development (REST) Event-driven architecture/Microservices at Scale Messaging Architecture (Service Bus) K8s Excellent communication skills across Senior Stakeholders and More ❯

systems Collaborate with cross-functional teams on end-to-end features Mentor junior developers through code reviews and guidance Enhance UX and maintain consistent design principles across the platform Participate in Agile ceremonies including stand-ups, backlog refinement, and retrospectives Evaluate and improve the frontend architecture, including state management … and API integrations Help implement real-time frontend/backend communication using WebSockets Extend and optimise the use of Nx for a frontend monorepo setup Leverage Zustand and TanStack Query for state/data handling, and React Router for navigation Work on real-time data visualisation, such as interactive … Proficiency in writing clean, testable code with solid test coverage Experience with testing frameworks such as Vitest and Playwright Familiarity with REST or GraphQL API design Ability to write high-quality CSS Independent ownership of deliverables and strong communication skills in a collaborative environment Preferred Qualifications: Experience working More ❯

systems Collaborate with cross-functional teams on end-to-end features Mentor junior developers through code reviews and guidance Enhance UX and maintain consistent design principles across the platform Participate in Agile ceremonies including stand-ups, backlog refinement, and retrospectives Evaluate and improve the frontend architecture, including state management … and API integrations Help implement real-time frontend/backend communication using WebSockets Extend and optimise the use of Nx for a frontend monorepo setup Leverage Zustand and TanStack Query for state/data handling, and React Router for navigation Work on real-time data visualisation, such as interactive … Proficiency in writing clean, testable code with solid test coverage Experience with testing frameworks such as Vitest and Playwright Familiarity with REST or GraphQL API design Ability to write high-quality CSS Independent ownership of deliverables and strong communication skills in a collaborative environment Preferred Qualifications: Experience working More ❯

you a technical leader ready to guide a high-performing engineering team? Do you enjoy mentoring others while staying close to architecture and system design? Interested in shaping tools that support real-world infrastructure at scale? We’re recruiting for a Lead Software Engineer on behalf of a fast … is Great Lead a talented team delivering software that supports the installation, configuration and maintenance of distributed systems at scale Balance hands-on technical design with mentoring and team development Collaborate across product, cloud, QA and systems engineering to deliver robust solutions Contribute to technical strategy, system architecture and … Node.js development, or similar backend technologies Designing and deploying services in a modern cloud environment Working with databases (SQL or NoSQL) and scalable system design Agile delivery and team collaboration Building for maintainability, performance and clear documentation Experience or interest in the following would also be valuable: Managing or More ❯

you a technical leader ready to guide a high-performing engineering team? Do you enjoy mentoring others while staying close to architecture and system design? Interested in shaping tools that support real-world infrastructure at scale? We’re recruiting for a Lead Software Engineer on behalf of a fast … is Great Lead a talented team delivering software that supports the installation, configuration and maintenance of distributed systems at scale Balance hands-on technical design with mentoring and team development Collaborate across product, cloud, QA and systems engineering to deliver robust solutions Contribute to technical strategy, system architecture and … Node.js development, or similar backend technologies Designing and deploying services in a modern cloud environment Working with databases (SQL or NoSQL) and scalable system design Agile delivery and team collaboration Building for maintainability, performance and clear documentation Experience or interest in the following would also be valuable: Managing or More ❯

you a technical leader ready to guide a high-performing engineering team? Do you enjoy mentoring others while staying close to architecture and system design? Interested in shaping tools that support real-world infrastructure at scale? We’re recruiting for a Lead Software Engineer on behalf of a fast … is Great Lead a talented team delivering software that supports the installation, configuration and maintenance of distributed systems at scale Balance hands-on technical design with mentoring and team development Collaborate across product, cloud, QA and systems engineering to deliver robust solutions Contribute to technical strategy, system architecture and … Node.js development, or similar backend technologies Designing and deploying services in a modern cloud environment Working with databases (SQL or NoSQL) and scalable system design Agile delivery and team collaboration Building for maintainability, performance and clear documentation Experience or interest in the following would also be valuable: Managing or More ❯

AI in a professional capacity. ✅ We're Looking For: 3+ years experience with Node.js and TypeScript Solid understanding of backend architecture , databases (PostgreSQL), and API design Exposure to React on the front end (bonus for design system knowledge) Experience with cloud infrastructure (preferably AWS) A builder’s More ❯

to lead the implementation of a brand-new system and ensure its seamless integration across the business. You will be responsible for leading the design and implementation of Azure solutions, with a strong focus on API integration, Azure Integration Services, and Infrastructure as Code using Bicep. Proficiency in … in London office. Key Responsibilities: Lead the implementation of Azure cloud platform Develop robust APIs using OpenAPI, JSON, and Azure Integration Services (Logic Apps, API Management, Service Bus) Write clean, maintainable code in C#/.NET for cloud-native applications and integrations Define and implement Infrastructure as Code using … hands-on experience with Microsoft Azure, particularly Azure integration services Proven track record of leading Azure solution implementations in enterprise environments Strong expertise in API design and integration, including OpenAPI/Swagger, JSON, and RESTful services Solid experience with C#/.NET for backend development and integration Deep More ❯

to lead the implementation of a brand-new system and ensure its seamless integration across the business. You will be responsible for leading the design and implementation of Azure solutions, with a strong focus on API integration, Azure Integration Services, and Infrastructure as Code using Bicep. Proficiency in … in London office. Key Responsibilities: Lead the implementation of Azure cloud platform Develop robust APIs using OpenAPI, JSON, and Azure Integration Services (Logic Apps, API Management, Service Bus). Write clean, maintainable code in C#/.NET for cloud-native applications and integrations. Define and implement Infrastructure as Code … hands-on experience with Microsoft Azure, particularly Azure integration services Proven track record of leading Azure solution implementations in enterprise environments. Strong expertise in API design and integration, including OpenAPI/Swagger, JSON, and RESTful services. Solid experience with C#/.NET for backend development and integration. Deep More ❯

technical audits Build applications, prototypes, and POCs Create enablement content: code samples, documentation, tutorials Provide ongoing support including bug resolution and performance optimization Influence API design and contribute feedback to product roadmaps Requirements: BS/MS in Computer Science or equivalent work experience 5+ years in web, software More ❯

related discipline Experienced full-stack engineer (5+ years) with strong Python backend skills and modern frontend framework expertise, particularly React. Solid database knowledge RESTful API design experience Familiarity with cloud platforms Docker containerisation What's In It For Me? Salary of £70,000 - £90,000 dependent on experience More ❯

the vision to build scalable, secure, and performant systems. Key Responsibilities Architect and lead the development of modern web applications using React and TypeScript Design scalable, secure, and resilient systems on AWS Collaborate closely with product, design, and data teams to deliver high-quality user experiences Mentor and … company Deep expertise in React , TypeScript , and modern JavaScript frameworks Strong experience designing and deploying web applications on AWS Excellent understanding of application architecture, API design, and cloud-native best practices Comfortable working autonomously and making strategic technical decisions Based in the UK and eligible to work without More ❯

AWS (Lambda, DynamoDB, SQS, SNS, ECS) Proven ability to take product requirements and deliver production-ready systems Background in event-driven architecture and RESTful API design 🌍 Location: London (Hybrid flexibility available) If you’re passionate about building high-impact systems and want to be part of a mission More ❯

and order architecture. Data - Data Architecture, Data Warehousing & Lakes, ETL/ELT Pipelines, Customer Data Platforms (CDPs), Data Governance & Compliance, or, Analytics & BI. Integration - API Design & Management, Middleware & ESB, Event-Driven Architecture, BSS/OSS Integration, Partner Ecosystem Integration, CI/CD & DevOps. Digital - Customer Portals & Self-Service More ❯

and order architecture. Data - Data Architecture, Data Warehousing & Lakes, ETL/ELT Pipelines, Customer Data Platforms (CDPs), Data Governance & Compliance, or, Analytics & BI. Integration - API Design & Management, Middleware & ESB, Event-Driven Architecture, BSS/OSS Integration, Partner Ecosystem Integration, CI/CD & DevOps. Digital - Customer Portals & Self-Service More ❯

and order architecture. Data - Data Architecture, Data Warehousing & Lakes, ETL/ELT Pipelines, Customer Data Platforms (CDPs), Data Governance & Compliance, or, Analytics & BI. Integration - API Design & Management, Middleware & ESB, Event-Driven Architecture, BSS/OSS Integration, Partner Ecosystem Integration, CI/CD & DevOps. Digital - Customer Portals & Self-Service More ❯

to shape product decisions, tech choices, and company culture Enjoy the freedom and challenge of working across the stack, from intuitive UX and robust API design to AI architectures and prompt engineering Believe AI is fundamentally reshaping the world - and want to be part of it Sound like More ❯

Product Manager – Embedded Payments (API, H2H, SWIFT) Location: London/Hybrid Industry: Banking | Payments | Embedded Finance Employment Type: 12+ month Contract (Daily rate) Our client, driving innovation in embedded finance, is seeking a talented Product Manager to join their Payments team. This is a unique chance to own and … to deliver scalable solutions that meet regulatory requirements and commercial goals. Key Responsibilities Lead the development and ongoing evolution of embedded payment products across API, H2H, and SWIFT channels Define and execute product strategy and roadmap focused on client outcomes and revenue growth Collaborate closely with engineering teams to … build integration-friendly, scalable payment solutions Partner with risk, compliance, and legal to embed regulatory controls into product design Own commercialisation efforts including pricing, P&L management, and go-to-market strategy Incorporate client feedback and market insights into product improvements Manage the full product lifecycle from launch through More ❯

and Engineering. Act as a liaison between technical teams and non-technical stakeholders to ensure a shared understanding of implementation details and impact. Support API design and documentation efforts, ensuring internal and third-party APIs are clearly defined, versioned, and well-integrated. Contribute to platform consistency by identifying More ❯

currently seeking an experienced Senior iOS Developer. You will be responsible for building and maintaining new and exciting features while also driving technical discussions, API designs and architecture. You will get the opportunity to make a big impact in a rapidly growing business. Their culture is based on working More ❯

business card interactions. As part of this role, you’ll help migrate our backend from Flask to Django , ensuring a scalable and well-structured API design. Responsibilities Design and develop analytics and reporting tools , providing insights into user engagement and marketing performance. Build and optimize data pipelines for … e.g., dashboards, tracking systems, attribution models). Strong experience with Django (or Flask) and PostgreSQL . Solid understanding of data pipelines, event tracking, and API integrations . Proficiency in React, TypeScript, and frontend visualization frameworks (e.g., D3.js, Chart.js, Recharts) . Hands-on experience with AWS services (EC2, S3, CloudFormation More ❯