1 to 25 of 56 API Design Jobs in Central London

Lead Software Engineer – UK Remote | £80,000 to £85,000 | Hands-on Leadership in Scalable Systems w/API Design Are 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 … 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 ❯

Lead Software Engineer – UK Remote | £80,000 to £85,000 | Hands-on Leadership in Scalable Systems w/API Design Are 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 … 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 ❯

advancements, initially targeting the medical, education, and legal sectors. We specialize in turning innovation into impact. We are seeking an experienced Solution Architect to design and own the solution architecture for our scalable SaaS and custom products . The ideal candidate will align with the product roadmap, purpose, and … strong focus on Microservices Architecture , ensuring that our solutions are scalable, configurable, and cloud-agnostic, with seamless integrations across various systems. Key Responsibilities: Architecture & Design: Microservices Focus : Architect, design, and implement a robust microservices-based solution, enabling agility, scalability, and independent service deployments. Define and own the solution … architecture for the product, ensuring scalability, configurability, and cloud-agnostic capabilities. Develop HLD (High-Level Design) and LLD (Low-Level Design) documents for the product. Create and maintain the deployment architecture , ensuring efficient and resilient deployment strategies. Design the integration architecture , including APIs, microservices, and third-party More ❯

working closely with infrastructure, architecture, and infosec teams to support high-availability production systems. The role also involves guiding CI/CD improvements, REST API design, and steering collaborative technical decisions across squads. What they’re looking for: Proven experience supporting large-scale, business-critical systems Strong background … and large enterprise environments Confident leading technical conversations across multiple engineering disciplines Experience with CI/CD pipelines and modern deployment practices Greenfield REST API design including HATEOAS implementation Angular, React or frontend exposure Familiarity with Snowflake or backend SQL variants This is a great opportunity for an More ❯

teams in London as Permanent or with 12 months FTC. Salary is up to £70k pa, hybrid. Main Duties & Responsibilities Include: Power Platform Development: Design, develop, and deploy custom applications using Power Apps, Power Automate, and Power BI, integrating with various data sources and systems. Azure Functions Integration: Create … and manage serverless Azure Functions to implement custom business logic, data processing, and API endpoints. Front-End Development: Build responsive and accessible user interfaces using modern JavaScript frameworks like React, Angular, incorporating the Fluent UI design system for a consistent and polished user experience. Ensure seamless interaction with … Fluent UI (or similar component library) Database Management: SQL Server, Azure Cosmos DB Cloud Architecture: Understanding of cloud concepts, Azure services, and best practices API Development: RESTful API, OData API design and implementation PowerShell Scripting: Experience in developing and maintaining PowerShell scripts for automation. Experience with More ❯

working closely with infrastructure, architecture, and infosec teams to support high-availability production systems. The role also involves guiding CI/CD improvements, REST API design, and steering collaborative technical decisions across squads. What they’re looking for: Proven experience supporting large-scale, business-critical systems in the … and large enterprise environments Confident in leading technical conversations across multiple engineering disciplines Experience with CI/CD pipelines and modern deployment practices REST API design This is a great opportunity for an experienced Java Developer to join a prestigious financial player. If you’re someone who thrives More ❯

join their growing team in the healthcare sector. In this role, you will take a high-level strategic approach to architecture, ensuring the overall design of complex systems is optimized for scalability, security, and performance. You will collaborate closely with stakeholders, engineers, and product owners, acting as a technical … and lead the architecture of complex, large-scale systems using modern Java technologies, ensuring alignment with the businesss strategic goals. Provide high-level architecture design decisions for microservices, APIs, and cloud solutions, ensuring adherence to best practices and industry standards. This role will be largely hands-off, however liaising … engineers, fostering a culture of learning and continuous improvement. Guide and collaborate with product owners to ensure that technical decisions align with business objectives. Design and Strategy: Design scalable, efficient, and secure microservices-based architectures that can scale with business needs. Develop strategies for integrating with existing systems More ❯

developers. This is an opportunity to shape the direction of our platform and foster a culture of collaboration and innovation. Key Responsibilities: Ruby Development: Design, build, and maintain robust, scalable, and high-performance Ruby applications. Write clean, maintainable, and efficient code following best practices and coding standards. Collaborate with … frontend developers to integrate backend services with the frontend. DevOps & Automation: Collaborate with the DevOps team to design and implement CI/CD pipelines and deployment automation. Ensure the smooth deployment of Ruby applications by utilizing infrastructure-as-code tools (e.g., Terraform, Ansible). Maintain and improve our cloud … based infrastructure (AWS, GCP, or Azure) to ensure scalability and reliability. Database Architecture & Optimization: Design and optimize databases (PostgreSQL, MySQL, or MongoDB) for high performance and scalability. Write efficient queries, manage indexing, and improve query performance. Implement data integrity and backup strategies to ensure data security. Leadership & Collaboration: Mentor More ❯

AI Agents Solution Architect - Future Talent (Q2/Q3 opportunities) for leading GSI in the software engineering market AI Solution Architect to design and implement AI-driven agent solutions for the online commerce space. Deep understanding of AI/ML models, cloud computing, and scalable system architecture. This role … requires expertise in architecting intelligent agents, optimizing cloud-based deployments, and integrating AI services into enterprise applications. Key Responsibilities: Architect and design AI-powered agent solutions that integrate with enterprise systems and cloud platforms. Develop and optimize RESTful and GraphQL APIs to facilitate AI-driven interactions. Utilize AWS services … Lambda, S3, API Gateway, SageMaker, DynamoDB, ECS, etc.) to deploy scalable AI solutions. Implement Full Stack JavaScript (Node.js, React.js, Express, TypeScript, Next.js, etc.) applications to support AI-driven interfaces. Work closely with data scientists and ML engineers to integrate machine learning models into cloud-native applications. Ensure security, scalability More ❯

This is an excellent opportunity for a seasoned professional to make a significant impact on our product and technical direction. Role Responsibilities: Lead the design, development, testing, and deployment of high-performance, scalable, and secure backend applications using PHP. Architect and optimize SQL databases (e.g., MySQL, Aurora) for performance … professional experience in backend development, with a strong focus on PHP. Extensive experience with modern PHP frameworks, especially Symfony. Deep expertise in SQL database design, optimization, and administration (e.g., complex queries, indexing, stored procedures, replication). Proven experience leading and mentoring a team of developers. Strong understanding of object … oriented programming (OOP) principles and design patterns. Experience with RESTful API design and development. Familiarity with version control systems, especially Git. Solid understanding of software development lifecycle (SDLC) and agile methodologies. Excellent problem-solving skills and the ability to troubleshoot complex technical issues. Strong communication and interpersonal More ❯

and implementation, ensuring our platform is scalable, secure, and aligned with the rapidly evolving AI landscape. Key Responsibilities Provide visionary architectural leadership for the design, development, and delivery of a new generation AI-driven SaaS platform. Lead, mentor, and manage a team of Senior Full-Stack Developers and engineers … development using: TypeScript (and JavaScript frameworks such as NextJS, Node, or Tailwind) Python (including frameworks like Django, Flask, or FastAPI) PostgreSQL and relational database design, optimization, and maintenance. AI Development Tools such as Windsurf, Aider or Augment. Demonstrable experience building and scaling SaaS platforms in a production environment. Strong … or platforms into software solutions. Domain experience in Recruitment Technology, HRTech, or closely related fields is a must. Proficient in software architecture, microservices, RESTful API design, and cloud-native development (AWS, Azure, or GCP preferred). Experience with CI/CD pipelines, automated testing, and DevOps practices. Solid More ❯

us accelerate development across our entire technology stack. Key Responsibilities: Build and enhance our application Develop robust front-end interfaces and back-end services Design and implement scalable database systems and APIs Build and enhance our AI agents Optimize application performance and ensure system reliability Collaborate with product and … with vector databases and AI/ML integration Experience with LLM orchestration frameworks (LangChain, LangGraph, etc.) Financial domain knowledge or fintech experience Experience with API design and microservices architecture Background in data engineering or ETL processes Knowledge of monitoring, logging, and performance optimization Understanding of agent architectures and More ❯

both frontend and backend development, ensuring seamless integration and high performance of web applications. Responsibilities Lead technical initiatives and projects, ensuring high-quality delivery. Design and implement complex software applications, emphasizing robust and scalable solutions. Collaborate with cross-functional teams to define, design, and ship new features. Ensure … code quality and maintainability through code reviews and adherence to design patterns. Optimize the performance of web applications to ensure fast and efficient user experiences. Mentor junior engineers and promote a culture of continuous learning and improvement. Address and refactor legacy code, bringing it up to modern standards and … in single-page applications (SPA) or back-office systems. Experience in optimizing the performance of web applications. Strong knowledge of software engineering principles and design patterns. Understanding of backend technologies, including Node.js, Express, or similar frameworks. 5+ years preferred. Experience with RESTful API design and development. Familiarity More ❯

. Support implementation of authentication systems (OAuth 2.0, Auth0, AWS Cognito). Gain exposure to security best practices (e.g., OWASP). Work on RESTful API design and consumption. Collaborate on version control practices using Git, documentation, and code reviews. Desired Skills: Passion for software development and continuous learning. … databases (relational and NoSQL). Familiarity with cloud platforms (AWS/Azure) is a plus. Exposure to Docker/Kubernetes is advantageous. Understanding of API integration and security fundamentals. Experience or interest in OCR and NLP is beneficial. Knowledge of version control (e.g., Git). Education & Experience: Degree in More ❯

talented 3 Fullstack Engineers (React/Python) to join the growing team and contribute to the development of intelligent, scalable digital products. Key Responsibilities: Design, build, and maintain scalable fullstack web applications using React on the frontend and Python (Django/FastAPI/Flask) on the backend. Collaborate closely … and modern JavaScript (ES6+) or TypeScript. Proficiency in Python , ideally with experience in web frameworks such as Django, FastAPI, or Flask. Strong understanding of API design, microservices, and web architecture. Experience with relational and NoSQL databases (e.g. PostgreSQL, MongoDB). Comfortable working with cloud services like AWS, Azure More ❯

designing, developing, and maintaining scalable backend systems, ensuring high performance and responsiveness to requests from front-end applications and third-party systems. Key Responsibilities: Design and develop robust backend services and RESTful APIs using Python (FastAPI, Flask, or Django) Build and deploy microservices that are scalable, loosely coupled, and … independently deployable Develop and manage serverless applications using AWS Lambda , API Gateway , DynamoDB , S3 , SNS , SQS , and Step Functions Implement event-driven architectures and data processing pipelines Collaborate with front-end developers, DevOps, and product teams to deliver high-quality software Ensure code quality through unit testing , integration testing … Experience: 7+ years of backend development experience using Python Strong experience in designing and implementing microservices Hands-on experience with AWS Serverless services: Lambda, API Gateway, S3, DynamoDB, SQS, SNS, etc. Proficient in RESTful API design , JSON, and OpenAPI/Swagger specifications Experience with asynchronous programming in More ❯

ll work side-by-side with the Founder & CEO to bring Tetto from concept to product-market fit and beyond. You’ll lead the design and build of our MVP, data infrastructure, and API-first architecture, setting the foundation for how we acquire, underwrite, and serve customers in … and launch the MVP using lean, modern technologies (utilising low/no-code, AI-powered IDEs, external APIs, pre-built insurance tools where useful) Design, integrate, and manage data pipelines across property data, IoT, geospatial risk, customer behavior, and third-party APIs Build Tetto’s own API layer … startup or fast-scaling tech company Proven ability to ship MVPs fast , with a pragmatic approach to technical debt and iteration Deep understanding of API design and integration , including building API endpoints that can embed into third-party platforms Experience with data architecture and enrichment , particularly around More ❯

code Security: CSPs, secure cookies, XSS/CSRF mitigation, OAuth2, SSO, SAML, encryption SEO & Performance: Core Web Vitals, metadata structuring, sitemap configuration, crawl budget API Design: RESTful APIs, OpenAPI/Swagger, GraphQL CMS: Experience with various CMS platforms; headless CMS integration (e.g., Contentful, Sanity, Strapi) Testing: Automated testing More ❯

lot of responsibility, and are passionate about producing reliable software solutions. Responsibilities Plan and execute technical strategies from concept to deployment, shaping software architecture, design, and best practices. Work with designers, PMs, and engineers to build, test, and refine desktop and enterprise-level software. Engage in all SDLC phases … design, development, testing, deployment—to set standards for future projects Use agile practices like TDD, CI, and rapid releases to enhance team efficiency and high-quality delivery. Solve complex technical challenges, ensuring scalable, reliable products through brainstorming and problem-solving. Foster collaboration by sharing expertise, mentoring, and promoting continuous … in agile methods like sprints, pair programming, and test-driven development. Adaptable, thrives in fast-paced environments, and quickly learns new technologies. SQL, RESTful API design, and modern front-end frameworks (React/Angular) experience is a plus. More ❯

backend experience, DevOps awareness, and proven technical leadership capabilities to join our Client’s London team. This is a high-impact role involving the design, development, and deployment of backend services that power our client’s security platform. You’ll work on systems at significant scale, leading both engineering … efforts and mentoring team members, while collaborating with globally distributed teams in the US, Ireland and India. Responsibilities: Design, develop, and maintain Java-based backend services using Spring Boot , REST/GraphQL , Kafka , PostgreSQL , and RabbitMQ . Contribute to infrastructure modernisation efforts, working closely with DevOps teams on Kubernetes … professional experience in software engineering, with a strong focus on Java backend development . Solid understanding of Spring Boot , Kafka , RabbitMQ , PostgreSQL , and modern API design patterns. Hands-on experience or familiarity with DevOps tools and concepts – e.g. Kubernetes , Git-based CI/CD , cloud infrastructure (AWS/ More ❯

re recruiting for a talented Senior Back End Developer to join our excellent team, based in Bank, London. The Senior Back End Developer will design, develop, test and support capabilities in our digital experience platform to create competitive advantage for SThree, as part of a small software development team. … and discovering life-changing jobs for the unsung heroes who will positively shape our future. What are the day-to-day tasks? Hands-on design, development and testing of solutions, adhering to SThree's architectural principles, policies, and guidelines. Work with business stakeholders to understand opportunities and to design solutions that deliver the required outcomes. Work with other technology teams to design and deliver end-to-end capabilities. Integrate solutions with other systems in SThree's technology landscape, for example CRM and ERP systems. Provide support to users and resolve systems issues. Configure CICD pipelines to support More ❯

you will define the business or technology architecture and plan how large projects will be delivered. You will be responsible for overseeing the solution design and implementation. In this role you will contribute to program and platform centre of excellence vision while advising and articulating program/project strategies … Key responsibilities: Identify and drive the organization's needs for Salesforce foundations (Health Cloud). Take a creative, critical-thinking approach to CRM solution design, creating outside-the -box recommendations to design well-thought-out Salesforce solutions that balance business needs and end-user experience. Lead cross-team … system design discussions, offering alternate choices, trade-offs, and impact analysis with a focus on long-term solutions. Provide guidance on application and integration development best practices, Enterprise Architecture standards, and functional/technical solution architecture, including environment management, testing, and Salesforce Platform. Drive the adoption of best engineering More ❯

SwiftUI | HealthTech, AI, Greenfield Start-up | Shoreditch, Hybrid | Up to £110,000 + Stocks & Benefits APIs & Communication: Strong understanding of REST, GraphQL, WebSockets, and API design best practices Ideally Fullstack TypeScript Engineer (across frontend and backend) Proven experience as a senior software engineer or tech lead, ideally in … framework (e.g., React with Tailwind, Angular, Vue) and SwiftUI (for mobile) Ideally experience with cloud services (AWS, GCP) and DevOps practices Knowledge of database design and management (SQL and NoSQL). Strong understanding of security best practices and data protection regulations. Compensation for the Founding Full Stack Tech Lead More ❯

SwiftUI | HealthTech, AI, Greenfield Start-up | Shoreditch, Hybrid | Up to £110,000 + Stocks & Benefits APIs & Communication: Strong understanding of REST, GraphQL, WebSockets, and API design best practices Ideally Fullstack TypeScript Engineer (across frontend and backend) Proven experience as a senior software engineer or tech lead, ideally in … framework (e.g., React with Tailwind, Angular, Vue) and SwiftUI (for mobile) Ideally experience with cloud services (AWS, GCP) and DevOps practices Knowledge of database design and management (SQL and NoSQL). Strong understanding of security best practices and data protection regulations. Compensation for the Founding Full Stack Tech Lead More ❯

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 … use 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 More ❯