1 to 25 of 42 API Design Jobs in London

Job Title: API Technical Lead Location: London (Hybrid) Job Description: We are seeking an experienced API Technical Lead to design, develop, and manage API solutions leveraging Kong API Gateway, IBM DataPower, and IBM Cloud Pak. This role requires a deep understanding of API management, security, and cloud-native architectures. The ideal candidate will have … expertise in designing scalable, secure, and high-performing API ecosystems for enterprise applications. Key Responsibilities: Lead the architecture, design, and implementation of API solutions using Kong API Gateway, IBM DataPower, and CloudPak. Define API standards, best practices, governance, and security models for API development and management. Collaborate with cross-functional teams to integrate APIs … with various backend services and external platforms. Ensure APIs are optimized for performance, scalability, and security. Implement API authentication, authorization, and security protocols (OAuth, JWT, Mutual TLS, etc.). Monitor API performance and troubleshoot issues using observability tools. Design and implement API versioning, rate limiting, and throttling policies. Provide mentorship to developers and drive API More ❯

in AI research and engineering in developing impactful solutions that are reshaping the world of regulatory compliance. Role Mission: To drive the strategic vision and execution of CUBE's API products, ensuring our APIs are the gold standard for integration enabling exceptional user experiences with minimal lift. The Role: Our APIs are the critical bridge between CUBE's powerful … Platform and users' existing tech stack. As a Senior Product Manager for API, you'll own the entire API product lifecycle-from strategic vision through to developer adoption and customer success. You'll be responsible for transforming complex integration problems into intuitive, scalable API solutions that enable financial institutions to integrate CUBE seamlessly. This is a hands … Working in our fast-paced, iterative environment, you'll navigate ambiguity with confidence, making strategic product decisions that balance technical excellence with commercial impact. Key Responsibilities: Manage and execute API product strategy, aligning with CUBE's strategic objectives and user needs. Develop, maintain and oversee execution of the API product roadmap. Define API product requirements, specifications, PRDs More ❯

Role Description: Working with the Project Manager, architects, clients & other stakeholders to implement MuleSoft APIs. This role will require knowledge of MuleSoft's Anypoint Studio & Anypoint Platform, which includes Design Center, Runtime Manager, API Manager, Exchange, etc. You must be capable of understanding business requirements, working with stakeholders & implementing complex integrations. Responsibilities: Designing & developing integration solutions using MuleSoft … modules. Collaborating with other developers & stakeholders to understand business requirements & translate them into integration solutions. Required Skills: Good experience of: integration concepts & technologies. MuleSoft Anypoint Platform & components (Mule ESB, API Manager, CloudHub, etc.) Java programming & experience with other programming languages such as XML, JSON, SQL Agile software development methodologies. Cloud-based integration platforms such as Amazon Web Services (AWS … or Microsoft Azure. API design and development. Knowledge of RESTful web services, SOAP, & other integration protocols Familiarity with API design & development best practices Strong problem-solving skills & ability to troubleshoot integration issues. Good communication & teamwork skills Strong understanding of Agile development methodologies & experience working in an Agile environment Nice to Have Skills: Experience with cloud platforms More ❯

and the latest trends in Audit delivery. Why Join KPMG As a Senior Python Developer As a Senior Python Developer, you will play a hands-on role in the design and development of secure, scalable, and high-performance backend services that drive key components of the audit technology landscape. You will develop integrations with internal and external APIs, build … code practices. What will you be doing Backend Development: Develop, test, and maintain Python-based backend services, leveraging asynchronous programming and multithreading to optimize performance and scalability where appropriate. API Integration: Develop, document, and consume RESTful APIs, including integration with Microsoft Graph APIs and other third-party systems. Security Compliance: Implement robust authentication and authorization mechanisms and enforce security … best practices to safeguard API communication and data integrity. Cloud Engineering: Design and implement components using Azure services such as Function Apps, API Management, Application Gateway, Azure AI Foundry, Databricks and Service Bus. DevOps & CI/CD: Collaborate on build and deployment automation using Git, Azure DevOps, and CI/CD pipelines. Workflow Automation: Collaborate with stakeholders More ❯

and the latest trends in Audit delivery. Why Join KPMG As a Senior Python Developer As a Senior Python Developer, you will play a hands-on role in the design and development of secure, scalable, and high-performance backend services that drive key components of the audit technology landscape. You will develop integrations with internal and external APIs, build … code practices. What will you be doing Backend Development: Develop, test, and maintain Python-based backend services, leveraging asynchronous programming and multithreading to optimize performance and scalability where appropriate. API Integration: Develop, document, and consume RESTful APIs, including integration with Microsoft Graph APIs and other third-party systems. Security Compliance: Implement robust authentication and authorization mechanisms and enforce security … best practices to safeguard API communication and data integrity. Cloud Engineering: Design and implement components using Azure services such as Function Apps, API Management, Application Gateway, Azure AI Foundry, Databricks and Service Bus. DevOps & CI/CD: Collaborate on build and deployment automation using Git, Azure DevOps, and CI/CD pipelines. Workflow Automation: Collaborate with stakeholders More ❯

and the latest trends in Audit delivery. Why Join KPMG As a Senior Python Developer As a Senior Python Developer, you will play a hands-on role in the design and development of secure, scalable, and high-performance backend services that drive key components of the audit technology landscape. You will develop integrations with internal and external APIs, build … code practices. What will you be doing Backend Development: Develop, test, and maintain Python-based backend services, leveraging asynchronous programming and multithreading to optimize performance and scalability where appropriate. API Integration: Develop, document, and consume RESTful APIs, including integration with Microsoft Graph APIs and other third-party systems. Security Compliance: Implement robust authentication and authorization mechanisms and enforce security … best practices to safeguard API communication and data integrity. Cloud Engineering: Design and implement components using Azure services such as Function Apps, API Management, Application Gateway, Azure AI Foundry, Databricks and Service Bus. DevOps & CI/CD: Collaborate on build and deployment automation using Git, Azure DevOps, and CI/CD pipelines. Workflow Automation: Collaborate with stakeholders More ❯

and the latest trends in Audit delivery. Why Join KPMG As a Senior Python Developer As a Senior Python Developer, you will play a hands-on role in the design and development of secure, scalable, and high-performance backend services that drive key components of the audit technology landscape. You will develop integrations with internal and external APIs, build … code practices. What will you be doing Backend Development: Develop, test, and maintain Python-based backend services, leveraging asynchronous programming and multithreading to optimize performance and scalability where appropriate. API Integration: Develop, document, and consume RESTful APIs, including integration with Microsoft Graph APIs and other third-party systems. Security Compliance: Implement robust authentication and authorization mechanisms and enforce security … best practices to safeguard API communication and data integrity. Cloud Engineering: Design and implement components using Azure services such as Function Apps, API Management, Application Gateway, Azure AI Foundry, Databricks and Service Bus. DevOps & CI/CD: Collaborate on build and deployment automation using Git, Azure DevOps, and CI/CD pipelines. Workflow Automation: Collaborate with stakeholders More ❯

Senior API Technical Consultant (GraphQL Specialist) Design and build next generation of high-scale SaaS platforms. We're looking for a senior/lead engineering consultant with deep expertise in GraphQL to take a leading role in developing our robust TypeScript/Node.js backend. You will be instrumental in shaping our technical direction, driving the evolution of our … APIs, ensuring our services are resilient, scalable and secure within a cutting-edge, cloud-native environment (Helm, Kubernetes). The Deliverables Design and build sophisticated, scalable GraphQL APIs and backend services using TypeScript and Node.js. Lead the design and evolution of our API schemas, ensuring they meet the complex demands of a rapidly growing platform. Champion best … team to guide process improvements and make key architectural decisions. Experience Extensive production experience architecting and delivering complex applications with TypeScript and Node.js . Expert level GraphQL , including advanced API design, schema evolution, performance optimisation. Strong automated testing frameworks like Vitest and Playwright . Proficiency with modern DevOps tooling and cloud-native architecture, including Docker , Helm , Kubernetes . More ❯

sectors. Key Responsibilities: Full stack developer with around 8-10 years development experience, working in a agile development team to deliver robust enterprise-wide solutions utilising industry standard practices Design, develop, enhance and maintain applications using agreed coding standards and quality targets. Ensure quality via code reviews and thorough unit testing. Liaise with immediate scrum team, other scrum/… Experience and expertise with the following technical stack Angular 13+ with DevExtreme UI library desirable Playwright, ReadyAPI and Specflow. Jira, Github, Confluenc Nice to have - C# and .NET6+ Rest API's and Microservice architecture SQL Server Database, NHibernate or Entity Framework Demonstrate expertise of: Building modern-web applications Modern UI design principles. i.e. Able to take initial design direction and interpret those guidelines to finalise the design through to a solution Restful API Design and development fundamentals Good SQL knowledge Test case preparation and execution EDUCATION & EXPERIENCE REQUIREMENTS 8-10 years' experience designing and developing applications both individually and as part of a team Familiarity with energy or financial trading environment Strong inter-personal More ❯

secure and robust solutions. The ideal candidate will be a technical leader, capable of designing and implementing the core architecture of our payment aggregation platform. Key Responsibilities: Lead the design and development of the core backend architecture, including the API gateway, transaction management layer, and merchant management layer. Select and implement appropriate technologies from our stack, which includes … python, Node.js, or Jave for programming languages; Django, Express.js, or Spring Boot for frameworks; and PostgreSQL or MySQL for transactional date, with Redis for caching and session management. Design and implement robust security measures, including AES-256 encryption for sensitive data, TLS for secure communication, and OAuth/JWT for authentication and authorisation. Ensure the platform is compliant with … external systems. Implement features for transaction tracking and status management (pending, completed, failed), refund and chargeback handling, and payment settlement (funds transfer to merchant accounts). Participate in architectural design discussions, code reviews, and technical mentoring. Contribute to the development of a developer-friendly API and comprehensive documentation. Set up and manage cloud infrastructure on AWS, Google Cloud More ❯

secure and robust solutions. The ideal candidate will be a technical leader, capable of designing and implementing the core architecture of our payment aggregation platform. Key Responsibilities: Lead the design and development of the core backend architecture, including the API gateway, transaction management layer, and merchant management layer. Select and implement appropriate technologies from our stack, which includes … python, Node.js, or Jave for programming languages; Django, Express.js, or Spring Boot for frameworks; and PostgreSQL or MySQL for transactional date, with Redis for caching and session management. Design and implement robust security measures, including AES-256 encryption for sensitive data, TLS for secure communication, and OAuth/JWT for authentication and authorisation. Ensure the platform is compliant with … external systems. Implement features for transaction tracking and status management (pending, completed, failed), refund and chargeback handling, and payment settlement (funds transfer to merchant accounts). Participate in architectural design discussions, code reviews, and technical mentoring. Contribute to the development of a developer-friendly API and comprehensive documentation. Set up and manage cloud infrastructure on AWS, Google Cloud More ❯

up-within a startup-style venture backed by the strength and stability of an established business. Key Responsibilities End-to-end development of high-quality, scalable SaaS platforms from design through deployment and maintenance. Architect and implement robust backend services primarily using Python and PostgreSQL. Develop and maintain responsive, performant front-end applications with TypeScript and modern frameworks (e.g. … development productivity and platform capabilities. Provide technical mentorship and leadership to development teams, fostering best practices in coding, testing, and deployment. Participate in code reviews, architecture discussions, and system design decisions. Troubleshoot and resolve complex technical issues across the full stack. Ensure software security, scalability, and performance are maintained at all times. Keep abreast of emerging technologies and industry … Proven expertise in full-stack 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 understanding and practical application of More ❯

Solution Architect - TOGAF, Network and Security Design Exp at N Consulting Ltd About the Role We are seeking a highly skilled Solution Architect with strong expertise in solution design, system integration, and technical leadership. The role involves defining end-to-end architectures, leading complex projects, and ensuring alignment with business and technical requirements. The ideal candidate will have … strong stakeholder management skills, deep knowledge of industry standards, and a solid understanding of security and cloud technologies. Key Responsibilities Lead solution architecture and high-level design for complex, large-scale projects. Design and integrate APIs and system components ensuring scalability, reliability, and security. Provide technical leadership across cross-functional teams to drive system integration initiatives. Collaborate with … analysis for new and existing solutions. Ensure adherence to formal architecture frameworks and standards (e.g., TMF, TOGAF). Evaluate and recommend cloud-based solutions and emerging technologies. Apply security design principles to ensure compliance and risk mitigation. Support project delivery teams by providing architecture guidance throughout the solution lifecycle. Key Skills & Experience Proven experience in Solution Architecture and System More ❯

robust and easy to maintain. You 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 in 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-scale web applications Experience working in an agile environment Strong experience with More ❯

secure, and privacy-compliant solutions that deliver measurable impact across the organization. A strong technical background is essential to understand and leverage the latest advancements in technology. Key Responsibilities: Design: Develop and document high-quality end-to-end solutions that meet internal requirements, ensuring they are fit for purpose, compliant, scalable, and secure. Innovation: Stay abreast of emerging technologies … and analyse data to support decision-making processes. Implement data governance frameworks and ensure data integrity, security, and compliance. This should include relational, graph, key-value and streaming data design constraints. Infrastructure Expertise: Design, deploy (using GitOps & IaC), and manage solutions on Azure and Kubernetes, ensuring high availability, scalability, and security. Risk Management: Identify and mitigate risks associated … with solution design and delivery, ensuring robust and resilient architectures. Mentor and develop technical talent, promoting a culture of learning and growth. Requirements: Proven experience in a senior leadership role driving innovation in complex, data-driven environments. Deep understanding of cloud infrastructure, data orchestration, and AI/ML applications in operational contexts. Strong business acumen with the ability to More ❯

secure, and privacy-compliant solutions that deliver measurable impact across the organization. A strong technical background is essential to understand and leverage the latest advancements in technology. Key Responsibilities: Design: Develop and document high-quality end-to-end solutions that meet internal requirements, ensuring they are fit for purpose, compliant, scalable, and secure. Innovation: Stay abreast of emerging technologies … and analyse data to support decision-making processes. Implement data governance frameworks and ensure data integrity, security, and compliance. This should include relational, graph, key-value and streaming data design constraints. Infrastructure Expertise: Design, deploy (using GitOps & IaC), and manage solutions on Azure and Kubernetes, ensuring high availability, scalability, and security. Risk Management: Identify and mitigate risks associated … with solution design and delivery, ensuring robust and resilient architectures. Mentor and develop technical talent, promoting a culture of learning and growth. Requirements: Proven experience in a senior leadership role driving innovation in complex, data-driven environments. Deep understanding of cloud infrastructure, data orchestration, and AI/ML applications in operational contexts. Strong business acumen with the ability to More ❯

secure, and privacy-compliant solutions that deliver measurable impact across the organization. A strong technical background is essential to understand and leverage the latest advancements in technology. Key Responsibilities: Design: Develop and document high-quality end-to-end solutions that meet internal requirements, ensuring they are fit for purpose, compliant, scalable, and secure. Innovation: Stay abreast of emerging technologies … and analyse data to support decision-making processes. Implement data governance frameworks and ensure data integrity, security, and compliance. This should include relational, graph, key-value and streaming data design constraints. Infrastructure Expertise: Design, deploy (using GitOps & IaC), and manage solutions on Azure and Kubernetes, ensuring high availability, scalability, and security. Risk Management: Identify and mitigate risks associated … with solution design and delivery, ensuring robust and resilient architectures. Mentor and develop technical talent, promoting a culture of learning and growth. Requirements: Proven experience in a senior leadership role driving innovation in complex, data-driven environments. Deep understanding of cloud infrastructure, data orchestration, and AI/ML applications in operational contexts. Strong business acumen with the ability to More ❯

secure, and privacy-compliant solutions that deliver measurable impact across the organization. A strong technical background is essential to understand and leverage the latest advancements in technology. Key Responsibilities: Design: Develop and document high-quality end-to-end solutions that meet internal requirements, ensuring they are fit for purpose, compliant, scalable, and secure. Innovation: Stay abreast of emerging technologies … and analyse data to support decision-making processes. Implement data governance frameworks and ensure data integrity, security, and compliance. This should include relational, graph, key-value and streaming data design constraints. Infrastructure Expertise: Design, deploy (using GitOps & IaC), and manage solutions on Azure and Kubernetes, ensuring high availability, scalability, and security. Risk Management: Identify and mitigate risks associated … with solution design and delivery, ensuring robust and resilient architectures. Mentor and develop technical talent, promoting a culture of learning and growth. Requirements: Proven experience in a senior leadership role driving innovation in complex, data-driven environments. Deep understanding of cloud infrastructure, data orchestration, and AI/ML applications in operational contexts. Strong business acumen with the ability to More ❯

in a greenfield, lab-first environment to prototype, iterate, and deploy solutions that meet the highest standards of performance, security, and compliance in a regulated financial setting. Accountabilities & Responsibilities Design and develop modern, responsive front-end applications from the ground up using React, TypeScript, and Next.js. Build secure, performant user interfaces that integrate with LLM APIs (e.g., Gemini, Azure … systems. Implement advanced front-end security features including token handling, session management, data masking, and audit logging. Translate UX/UI designs into modular, reusable components aligned with enterprise design systems. Integrate front-end applications with REST/GraphQL APIs, WebSockets, and backend services. Collaborate with AI engineers, backend developers, and cloud architects to deliver end-to-end solutions. … regular code reviews. Deploy applications to GCP (Firebase, Cloud Run) and Azure App Services using CI/CD pipelines hardened for security and compliance. Participate in code reviews, technical design discussions, and architecture planning sessions. Required Knowledge, Skills & Experience Proven experience building secure, production-grade front-end applications in regulated environments (e.g., finance, healthcare, government). Strong proficiency in More ❯

in a greenfield, lab-first environment to prototype, iterate, and deploy solutions that meet the highest standards of performance, security, and compliance in a regulated financial setting. Accountabilities & Responsibilities Design and develop modern, responsive front-end applications from the ground up using React, TypeScript, and Next.js. Build secure, performant user interfaces that integrate with LLM APIs (e.g., Gemini, Azure … systems. Implement advanced front-end security features including token handling, session management, data masking, and audit logging. Translate UX/UI designs into modular, reusable components aligned with enterprise design systems. Integrate front-end applications with REST/GraphQL APIs, WebSockets, and backend services. Collaborate with AI engineers, backend developers, and cloud architects to deliver end-to-end solutions. … regular code reviews. Deploy applications to GCP (Firebase, Cloud Run) and Azure App Services using CI/CD pipelines hardened for security and compliance. Participate in code reviews, technical design discussions, and architecture planning sessions. Required Knowledge, Skills & Experience Proven experience building secure, production-grade front-end applications in regulated environments (e.g., finance, healthcare, government). Strong proficiency in More ❯

have the opportunity to work across a modern engineering environment, collaborate with agile product teams, and contribute to a high-traffic platform used by millions of customers. Key Responsibilities: Design, build, and maintain scalable, high-performance services using Kotlin or Java Provide technical leadership and mentoring to other engineers in the team Contribute to solution architecture and strategic technical … Skills & Experience 5+ years of back-end development experience using Kotlin or modern Java Expertise in microservice architectures and frameworks like Spring Boot or http4k Deep understanding of RESTful API design and integration Proven experience mentoring engineers and contributing to high-performing teams Familiarity with Agile (Scrum or Kanban), TDD, and pair programming practices Experience with CI/ More ❯

code reviews Collaborating with designers, product managers, and QA to deliver high-quality releases SKILLS & EXPERIENCE Strong commercial experience with Python/Django and React Solid understanding of REST API design and integration Proficiency with relational databases (PostgreSQL preferred) Experience in secure coding practices, ideally within regulated environments (healthcare, finance, etc.) Familiarity with cloud platforms (AWS/GCP More ❯

the Software Engineering group. In addition to contributing to feature development, you will play a role in shaping the technology and process strategies, and occasionally lead innovation or software design initiatives. Key Responsibilities: Develop new features with a strong focus on high-quality code. Conduct peer code reviews to ensure quality and adherence to best practices. Participate in daily … organization's objectives. Work closely with tech leads, engineers, testers, and other personnel to deliver high-quality products. Take ownership of initiatives related to innovation or addressing technical debt. Design, document, and communicate system solutions with a balanced focus on time, quality, cost, and performance. Collaborate with colleagues across the organization to gain buy-in and feedback on proposals … Required Knowledge & Experience: Essential: Strong proficiency in C# at a commercial level. Solid experience with .NET Core and related open-source technologies. Knowledge of Object Orientation, SOA, and relevant design patterns. Experience with modern software development practices, including agile methodologies , version control, code reviews, and continuous integration. Understanding of concurrency, asynchrony, and parallelism. Experience with Test Driven Development (TDD More ❯

the Software Engineering group. In addition to contributing to feature development, you will play a role in shaping the technology and process strategies, and occasionally lead innovation or software design initiatives. Key Responsibilities: Develop new features with a strong focus on high-quality code. Conduct peer code reviews to ensure quality and adherence to best practices. Participate in daily … organization's objectives. Work closely with tech leads, engineers, testers, and other personnel to deliver high-quality products. Take ownership of initiatives related to innovation or addressing technical debt. Design, document, and communicate system solutions with a balanced focus on time, quality, cost, and performance. Collaborate with colleagues across the organization to gain buy-in and feedback on proposals … Required Knowledge & Experience: Essential: Strong proficiency in C# at a commercial level. Solid experience with .NET Core and related open-source technologies. Knowledge of Object Orientation, SOA, and relevant design patterns. Experience with modern software development practices, including agile methodologies , version control, code reviews, and continuous integration. Understanding of concurrency, asynchrony, and parallelism. Experience with Test Driven Development (TDD More ❯

part-time basis (4 days per week) in London. You will work alongside AI, ML, and app development teams to build scalable, secure, and intelligent backend services. Key Responsibilities Design, develop, and maintain scalable backend services using .NET Core/.NET 6+ Collaborate efficiently on an AI-driven project alongside the customers Lead Backend Engineer Work closely with ML … Engineers, App Developers, and Data teams for integrated feature delivery Design and build RESTful APIs to expose AI models and LLM prompt-based services Integrate trained ML models into backend systems supporting real product features Build and maintain infrastructure for data ingestion, processing, and secure storage Support full end-to-end testing with QA and development teams to prevent … models Secure APIs and data pipelines with encryption and appropriate authentication measures Required Skills and Experience Proven experience in .NET Core/.NET 6+ development Strong understanding of REST API design and backend microservices architecture Experience working on AI/ML integrations in production environments Familiarity with secure coding practices and enterprise-level data protection standards Comfortable with More ❯