26 to 50 of 98 API Design Jobs in London

your career while helping us deliver exceptional solutions. \n As a Lead Software Development Engineer in Test (SDET) in our technology team, you will design, build, and support automated testing frameworks for backend applications. You will collaborate closely with developers and engineers to ensure robust, scalable, and reliable systems. … driving innovation and efficiency within our testing processes. Together, we foster a culture of learning, teamwork, and excellence. \n Job Responsibilities: \n \n Design and support automated testing frameworks for backend applications \n Develop and maintain test scripts using Python3 and pytest \n Implement and validate REST API ...

Overview: Youll operate as the technical spearhead for a greenfield product build, reporting to the Director of Engineering. Expect deep backend engineering, distributed system design, and high-quality serverless delivery, plus the chance to adopt modern AI-assisted development practices as part of your workflow. What Youll Bring: Senior … ability to architect and lead distributed REST microservices at scale. Strong authority in AWS serverless engineering: Lambda-first mindset, hands-on experience with API Gateway, SQS, Step Functions, EventBridge and IAM. Deep data expertise across Aurora MySQL and DynamoDB: schema design, access patterns, indexing, query tuning, and pragmatic ...

senior, individual engineers have outsized impact which is exactly why ownership matters so much in this role. What you'll own Backend & architecture. Design, build and evolve the services, APIs, data pipelines and scoring/recommendation logic at the core of the product owning architecture, infrastructure, schema design … looking for Must-haves Strong full-stack/backend engineering. 5+ years of professional software development (stack flexible) with strong server-side fundamentals API design, data modelling/schema design, authentication patterns and clean service architecture. Comfortable across SQL databases and a modern backend stack (e.g. Python ...

make your application. JOB DESCRIPTION As a Software Engineer III at JPMorganChase, you serve as a seasoned member of an agile team to design and deliver trusted market-leading technology products in a secure, stable, and scalable way. You are responsible for carrying out critical technology solutions across multiple … Your success will be measured by resiliency, usability, and speed of delivery in a highly operational, business-critical environment. Job Responsibilities Executes software solutions, design, development, and technical troubleshooting with ability to think beyond routine or conventional approaches to build solutions or breakdown technical problems Creates secure and high ...

this role. \n JOB DESCRIPTION \n As a Software Engineer III at JPMorganChase, you serve as a seasoned member of an agile team to design and deliver trusted market-leading technology products in a secure, stable, and scalable way. You are responsible for carrying out critical technology solutions across … measured by resiliency, usability, and speed of delivery in a highly operational, business-critical environment. \n Job Responsibilities \n \n Executes software solutions, design, development, and technical troubleshooting with ability to think beyond routine or conventional approaches to build solutions or breakdown technical problems \n Creates secure and high ...

applications, platforms and deployment processes. This is not a traditional vulnerability management role, it is a hands-on Application Security role centred on secure design, CI/CD security, cloud-native technologies, Kubernetes, API security, code analysis, security-as-code and supporting development teams to build secure applications. … controls throughout CI/CD pipelines. Strengthening the security of GitHub Actions and comparable continuous integration and deployment platforms. Providing technical guidance on secure API design and protecting externally accessible systems. Supporting the security of Azure cloud infrastructure, including Azure Kubernetes Service (AKS). Assisting with the protection ...

team works with top tier global financial institutions and major tech companies to offer Wise products and services directly to their customers. Through our API, we help partners to architect and build integrations to our world class-leading international finance products, which in turn improves Wise Platform by increasing … improve turnaround times. Designing and developing innovative new features that expand the functionality of Wise's services and exposing these features through the public API, enabling seamless integration with partner systems and empowering them to leverage the full potential of Wise's platform. Diagnosing and resolving complex technical issues ...

foundational systems that power our embedded finance platform at global scale. The team owns multi‐tenant infrastructure, drives cross‐domain product capabilities, and helps design technical solutions for enterprise customers. Key areas of ownership include: Embedded Finance Platform: Build and maintain the infrastructure powering customers like Rippling, Navan, Qantas … career development. Set technical direction for scalable, reliable backend systems and partner with senior engineers on architecture and design. Ensure high standards for system design, code quality, testing, and operational excellence. Drive improvements across reliability, observability, security, and developer productivity. Work cross‐functionally with product, design, compliance, sales ...

Boomi AtomSphere, connecting multiple enterprise platforms across cloud and on-premise environments. This is a hands-on technical position requiring strong Boomi development experience, API integration knowledge and the ability to support complex integration landscapes. Key Responsibilities: Design and develop scalable integration solutions using Dell Boomi AtomSphere, including … secure Managed File Transfer (MFT) workflows to support high-volume and sensitive data transfers Publish, secure and govern REST/SOAP APIs through Boomi API Management, including gateway configuration, throttling and developer portal management Develop and maintain CI/CD pipelines using Git, Azure DevOps or Jenkins, supporting automated ...

works with top tier global financial institutions and major tech companies to offer Wise products and services directly to their customers. \n Through our API, we help partners to architect and build integrations to our world class-leading international finance products, which in turn improves Wise Platform by increasing … times. \n \n Designing and developing innovative new features that expand the functionality of Wise's services and exposing these features through the public API, enabling seamless integration with partner systems and empowering them to leverage the full potential of Wise's platform. \n \n Diagnosing and resolving complex ...

Tech Lead, Senior Software Engineer or Software Architect who enjoys solving complex technical problems and building modern, scalable software. Role & Responsibilities Lead the technical design and evolution of a large-scale business-critical platform. Improve the existing architecture and define a pragmatic roadmap towards a modern, scalable solution. Design … powered capabilities into the product to improve functionality and user experience. Drive the adoption of AI-assisted software development tools and engineering best practices. Design integrations with enterprise platforms, APIs and wider business systems. Work closely with Product, Architecture and Engineering teams to deliver incremental improvements. Mentor developers ...

professionals for this role.\ NJOB DESCRIPTION\ NAs a Software Engineer III at JPMorganChase, you serve as a seasoned member of an agile team to design and deliver trusted market-leading technology products in a secure, stable, and scalable way. You are responsible for carrying out critical technology solutions across … success will be measured by resiliency, usability, and speed of delivery in a highly operational, business-critical environment.\ NJob Responsibilities\ N\nExecutes software solutions, design, development, and technical troubleshooting with ability to think beyond routine or conventional approaches to build solutions or breakdown technical problems\ NCreates secure and high ...

this is an opportunity to help shape the future of a rapidly evolving platform. Role The Full Stack Developer will contribute to full-stack design and development across the platform. Design, develop, and maintain both front-end user interfaces and back-end services, APIs, and databases. Monitor platform … strong focus on backend development. Bachelor's or Master's degree in Computer Science, Engineering, or a related discipline. Strong understanding of database design, data modelling, and optimisation, particularly using SQL. Hands-on experience working with Google Cloud Platform (GCP) services. Experience monitoring production systems, triaging issues, and distinguishing ...

enjoys building from the ground up. The salary range is up to £120,000 depending on experience and fit. Key Responsibilities Own the design, development, and operation of the core backend services that power our consumer-facing products and internal operational tooling. Build scalable, low-latency systems that … notification preferences, audience segmentation, and delivery tracking. Integrate with third-party data providers and external services, ensuring robust failure handling, observability, and system resilience. Design and support secure internal tooling APIs, including role-based access controls, audit trails, change history, and safe administrative workflows. Build and operate event-driven ...

Chicago). The role offers the opportunity to contribute to business-critical systems while working in a collaborative and supportive environment. Key Responsibilities Design, develop, enhance, and maintain enterprise applications using C# and .NET technologies. Support and improve existing business-critical systems, ensuring stability, performance, and scalability. Work closely … with business users, analysts, and technical teams to gather requirements and deliver solutions. Participate in the full software development lifecycle, including design, development, testing, deployment, and support. Collaborate with globally distributed development teams across multiple locations and time zones. Contribute to technical discussions, solution design, code reviews ...

Chicago). The role offers the opportunity to contribute to business-critical systems while working in a collaborative and supportive environment. Key Responsibilities Design, develop, enhance, and maintain enterprise applications using C# and .NET technologies. Support and improve existing business-critical systems, ensuring stability, performance, and scalability. Work closely … with business users, analysts, and technical teams to gather requirements and deliver solutions. Participate in the full software development lifecycle, including design, development, testing, deployment, and support. Collaborate with globally distributed development teams across multiple locations and time zones. Contribute to technical discussions, solution design, code reviews ...

This role emphasizes engineering excellence, operational readiness, and secure, compliant delivery in a fast-paced global environment. \n Job Responsibilities \n \n Lead the design and delivery of user interface capabilities across Execute, from discovery to production support \n Set front-end technical direction, including architecture, standards, performance … setting standards, leading designs, and directly managing or mentoring small teams of mid-level engineers \n Solid software engineering fundamentals, including OO/design patterns, debugging, and documentation \n Familiarity with agentic development approaches across the software development lifecycle \n Strong communication and people skills, with the ability ...

What were looking for: Hands-on experience running real production workloads on AWS not just deploying to it Strong Postgres/SQL skills: schema design, query tuning, migrations Solid API design chops: clear contracts, versioning, backwards compatibility Python-first mindset (FastAPI or similar) Redis experience: caching patterns ...

lead a team of elite engineers who embed directly with Fortune 500 customers to ship deeply integrated AI agents—owning everything from agent design and evaluation to the backend services, data systems, and cloud infrastructure that make them production-ready. You'll partner closely with our Forward Deployed … volume for senior engineering roles. Hands‐on fluency with the full AI stack. Deep familiarity with LLMs and agent systems, evaluation frameworks, backend and API design (Python or TypeScript), data systems (PostgreSQL, DynamoDB, MongoDB, or similar), and cloud infrastructure (AWS, Azure, or GCP) including Kubernetes, Docker ...

Tech Lead, Senior Software Engineer or Software Architect who enjoys solving complex technical problems and building modern, scalable software. Role & Responsibilities Lead the technical design and evolution of a large-scale business-critical platform. Improve the existing architecture and define a pragmatic roadmap towards a modern, scalable solution. Design … powered capabilities into the product to improve functionality and user experience. Drive the adoption of AI-assisted software development tools and engineering best practices. Design integrations with enterprise platforms, APIs and wider business systems. Work closely with Product, Architecture and Engineering teams to deliver incremental improvements. Mentor developers ...

scale. This role emphasizes engineering excellence, operational readiness, and secure, compliant delivery in a fast-paced global environment.\ NJob Responsibilities\ N\nLead the design and delivery of user interface capabilities across Execute, from discovery to production support\ NSet front-end technical direction, including architecture, standards, performance, and testing strategy … time or data-intensive user experiences\ NDemonstrated technical leadership in setting standards, leading designs, and mentoring teams\ NSolid software engineering fundamentals, including OO/design patterns, debugging, and documentation\ NFamiliarity with agentic development approaches across the software development lifecycle\ NStrong communicationskills and ability to work effectively in global, cross ...

workflows at scale. This role emphasizes engineering excellence, operational readiness, and secure, compliant delivery in a fast-paced global environment. Job Responsibilities Lead the design and delivery of user interface capabilities across Execute, from discovery to production support Set front-end technical direction, including architecture, standards, performance, and testing … time or data-intensive user experiences Demonstrated technical leadership in setting standards, leading designs, and mentoring teams Solid software engineering fundamentals, including OO/design patterns, debugging, and documentation Familiarity with agentic development approaches across the software development lifecycle Strong communication skills and ability to work effectively in global ...

division. This position falls under our Cross Border line of business and is located in London. In this role, you will contribute to the design and development of our eMoney and FX payment systems. You will report directly to the Engineering Manager and collaborate closely with Product, Design … will set you up for success by providing: Assigned workspace or home office setup Company-issued equipment Role Responsibilities Provide significant contribution to the design, development, and maintenance of secure and scalable payment systems. Collaborate with engineering managers, designers, and product teams to gather and analyse requirements, implement technical ...

This role emphasizes engineering excellence, operational readiness, and secure, compliant delivery in a fast-paced global environment. \n Job Responsibilities \n \n Lead the design and delivery of user interface capabilities across Execute, from discovery to production support \n Set front-end technical direction, including architecture, standards, performance … data-intensive user experiences \n Demonstrated technical leadership in setting standards, leading designs, and mentoring teams \n Solid software engineering fundamentals, including OO/design patterns, debugging, and documentation \n Familiarity with agentic development approaches across the software development lifecycle \n Strong communication skills and ability to work effectively ...

team culture. This role emphasizes engineering excellence, operational readiness, and secure, compliant delivery in a fast-paced global environment.\ NJob Responsibilities\ N\nLead the design and delivery of user interface capabilities across Execute, from discovery to production support\ NSet front-end technical direction, including architecture, standards, performance, and testing … leadership in setting standards, leading designs, and directly managing or mentoring small teams of mid-level engineers\ NSolid software engineering fundamentals, including OO/design patterns, debugging, and documentation\ NFamiliarity with agentic development approaches across the software development lifecycle\ NStrong communicationand people skills, with the ability to work effectively ...