26 to 50 of 59 API Design Jobs in London

institutions? At JPMorganChase, we build platforms that move markets - and we're looking for engineers who want to lead at the intersection of performance, design, and scale. Here, your work will be seen, felt, and used by traders and sales professionals every day. As a Lead Software Engineer … thrives on technical ownership, engineering excellence, and building intuitive, high-signal workflows at scale in a fast-paced global environment. Job responsibilities Lead the design and delivery of user interface capabilities across Execute, from discovery through to production support Set front-end technical direction, including architecture, standards, performance benchmarks ...

Applications (C&CA) practice as a Solution Engineer supporting business-critical acquiring and chargeback services. Working within a collaborative delivery environment, you will help design and build scalable, resilient solutions that enable clients to respond to evolving business needs with confidence. In line with our vision, Consult with Purpose. … Company offices, client sites, and your home; noting that you will be unable to work at home 100% of the time. Key Responsibilities: Design and deliver scalable, secure, and resilient business services that support critical acquiring and chargeback processes. Build and maintain event-driven solutions that enable reliable processing ...

security etc). Working within a project management/agile delivery methodology Experience in technical ownership for a product or software solution, covering design, estimation, shaping and user story/requirement creation Documentation of solutions (e.g. architecture, configuration, release, support-handover Collaborate and liaise with other Version … including microservices and message-driven architectures NFR/Non-Functional requirement understanding and experience developing applications with this in mind Application/Digital Services Design experience Experience in software engineering practices like Code Reviews, CI/CD Pipelines and SOLID/DRY principals Hands-on developing/coding role ...

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 ...

Slack and React: the agents people talk to and the apps they click through, built in TypeScript. And you don't stop there. From API and MCP design to infrastructure on Vercel, AWS, Supabase, and BigQuery, plus the agents that work across the stack, you own complete features … software factory. What you'll bring 5+ years of experience building applications or tooling that automate human workflows Full-stack experience across the board: API design, databases, async workflows and background jobs on the backend, and clean, user-friendly UX on the frontend. Being AI-native. An early ...

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 internalMust be able to exhibit technical thought leadership and excellent problem solving ability, with ...

Full Stack Engineering experience 5 years of React or React Native development 5 years of Java development experience Spring Boot framework expertise RESTful API design development and integration Microservices architecture and implementation SQL and database technologies Test Driven Development TDD and Behaviour Driven Development BDD Unit integration … testing practices GitLab and CICD pipeline implementation Open API Specification OAS YAML Cloud engineering experience AWS preferred Secure coding and application security best practices DevOps and Continuous Delivery methodologies Strong stakeholder management and client facing communication skills Experience translating business requirements into technical solutions Agile delivery methodologies and cross ...

global platform for the LGBTQ+ business community. Please do not contact the recruiter directly. Are you passionate about shaping technology strategy and guiding the design of scalable, secure software solutions? Do you enjoy collaborating with senior engineering leaders and influencing architectural direction to deliver long-term business value About … event-driven architecture and domain-driven design. Experience defining solution architectures, integration patterns and non-functional requirements for business-critical systems. Strong knowledge of API design, systems integration, messaging technologies and distributed systems. Experience with cloud platforms such as AWS and modern engineering practices including containerisation, infrastructure ...

teams to integrate security throughout the software development lifecycle. Microsoft Azure and KQL experience are essential, alongside relevant experience in CI/CD, Kubernetes, API security, security-as-code and security automation. This is a hands-on application security role focused on secure design, application security testing … Integrating security controls into CI/CD pipelines. Strengthening the security of GitHub Actions and similar CI/CD platforms. Providing guidance on secure API design and externally accessible systems. Supporting Azure cloud infrastructure, including Azure Kubernetes Service (AKS). Developing security-as-code and policy-as-code. ...

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 ...

Software Architect – Retail Wealth Management 100,000 Plus Bonus and Bens 10% Pension Quant Capital is urgently looking for a Technical Architect with REST API Experience to join or well known Fintech client who are a well know wealth management software business. We are looking for a technically strong … architect to help to design and grow a SaaS platform. The company has bold global ambitions. They have a comprehensive microservices architecture in backend and are looking to extend the pattern into an ambitious micro-frontend strategy for user-facing applications. This is a leadership position. You will ...

inclusive team culture. 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 … leadership in setting standards, leading designs, and directly managing or mentoring small teams of mid-level engineers Solid software engineering fundamentals, including OO/design patterns, debugging, and documentation Familiarity with agentic development approaches across the software development lifecycle Strong communication and people skills, with the ability to work ...

Experience with AWS or Azure Familiarity with Docker and Kubernetes Experience working in secure or highly regulated environments Strong understanding of software architecture and API design IT WOULD BE NICE FOR THE AI SOFTWARE ENGINEER TO HAVE. Experience with RAG pipelines and vector databases Knowledge of MLOps tooling ...

across our client estate, spanning multiple platforms, hosting environments and codebases. Shape technical solutions for new business, from initial qualification through discovery to solution design and estimation. Lead the architecture of our largest and most complex client projects. Act as the senior technical escalation point for live incidents … client's budget, team and long-term maintenance capability, not to the most interesting technical solution available. You uphold a clear software design philosophy and ensure teams deliver maintainable solutions. You have a clear understanding of simplicity. You define solutions that are simple by design and challenge requirements ...

skilled Java Software Engineer with a growing interest and demonstrated exposure to AI/ML integration. This role is primarily Java-centric — you will design and build cloud-native microservices on our BPA (Beyond Policy Administration) platform — with the expectation that you actively apply AI tooling and patterns … prototype level. Role Details Location: London Experience: 4–7 years of overall software engineering experience Engagement Model: Full-time, Product Engineering Job Responsibilities Design and implement RESTful APIs and microservices using Java 17+ and Spring Boot 3.x. Build and maintain business logic within the BPA platform, ensuring correctness, performance ...

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 ...

Develop and maintain high-quality software applications using .NET (4.5+/.NET Core) and Python. Collaborate with cross-functional teams to gather requirements and design effective solutions. Provide support to team members and stakeholders to ensure smooth project execution. Liaise with technical and business colleagues to understand functional requirements … deliver solutions that align with business objectives. Utilise your understanding of Web Services (REST, SOAP) to design and document APIs effectively. Work with MS SQL Server, including TSQL, SSIS, SSRS for database management and reporting. Utilise version control tools such as Git/Bitbucket and job scheduling tools like ...

working on the underlying systems that make complex visualisations fast, accurate, and scalable. The challenges range from rendering performance and interaction design through to algorithms, graphics, API design, and numerical correctness. What you’ll be doing Designing and building core charting features used by developers around … exceptionally high technical standards High levels of ownership and autonomy Small team, significant impact Opportunity to deepen expertise in performance, graphics, visualisation, and systems design Package Salary up to £200,000 Hybrid working (London) Private healthcare Pension Additional benefits If you’re interested in building the technology behind modern ...

designing and implementing APIs and integrations within complex digital ecosystems, including CRM, payment and marketing platforms. Database and data management. Strong expertise in database design and efficient querying in the context of web applications. Cloud and deployment. Practical experience with cloud platforms and managed hosting, particularly Azure and Umbraco … .NET practice Umbraco Cloud, or equivalent managed hosting experience, including environment strategy and deployment workflow Major version upgrade planning and delivery on live platforms API design and consumption, REST and GraphQL, including third-party integrations SQL Server and efficient data querying in a web application context Modern front ...

deliver improvements for the firm. All of these sub-projects offer great exposure to linear products and working with the business. You will help design and build a suite of modern services including: Instrument Management Integration with enterprise data sources Support for pre-issuance, corrections, and overrides Direct integration … roadmap with multiple strategic deliverables What we are looking for in required skills; Strong C# development experience Real-time data and event-driven systems API design and backend service development Performance optimisation, threading, and memory management Experience building scalable, highly available systems What we would like ...

Hybrid Build the AI systems our users actually experience. We're looking for a dynamic AI Engineer (5+ years) to design, build, and deploy autonomous, user-facing AI solutions - LLM-powered applications, agentic workflows, and intelligent systems that perform reliably at scale, not just in a demo. What … Degree in Computer Science (or equivalent) with strong AI/ML/NLP foundations Strong Python skills, familiarity with Java/Kotlin, and solid API design experience Hands-on experience with LangChain, LangGraph, and LLM APIs (OpenAI, Anthropic, etc.) Skilled in prompt engineering and orchestrating AI agents/ ...

models and integration patterns Reviewing significant technical initiatives and providing architectural guidance across multiple engineering teams Embedding security, resilience, scalability and observability into platform design from the outset Identifying architectural risk, technical debt and platform constraints Partnering with Engineering and Product leadership on strategic technical decisions Influencing engineering teams … experience defining architecture across SaaS, product-led or platform-based environments Experience working across complex, multi-system or distributed technology landscapes Strong understanding of API design, integration architecture and service-oriented systems Cloud architecture experience, ideally within Azure A strong appreciation for security-by-design, resilience, scalability ...

technical challenges. Identifying appropriate technologies and approaches for different customer requirements. Developing cloud-native applications and services. Contributing across the full delivery lifecycle, from design and development through to deployment and operational support. Identifying innovative ways to solve complex engineering and business problems. Working collaboratively with software engineers, cloud … following areas would be advantageous: AWS Associate-level certification, such as AWS Solutions Architect, AWS Developer or AWS DevOps Engineer. Microservices architecture and API design. Docker and container platforms including Kubernetes, Amazon EKS or Amazon ECS. AWS operational concepts, including monitoring, observability and FinOps. CI/CD tooling such ...

between Coupa and SAP S/4HANA. This is an opportunity to work on a high-profile global programme, owning integration architecture from initial design through to deployment, cutover and Hypercare. What you'll be doing: Designing and delivering Coupa SAP S/4HANA integrations across complex enterprise landscapes … Leading integration architecture, solution design and technical delivery Building and managing APIs including REST/JSON, OData, IDocs and BAPIs Supporting procurement process integrations covering: Supplier and Business Partner data Purchase Orders Goods Receipts Service Entry Sheets Invoices and payment status updates Master data synchronisation Working with integration platforms ...

vertical, evolving it from a standalone capability into a scalable platform proposition Lead expansion into new acceptance channels and emerging adjacent sectors.] Own API strategy and enablement, ensuring seamless integration with partner technologies and external devices. Develop the vision and roadmap for a key new vertical, shifting from … within Card Present/In-Person Payments Experience owning and scaling payment APIs and third-party integrations Ability to engage in technical discussions around API design, integrations and hardware/software interactions Proven track record identifying product-market fit and expanding into new verticals Experience operating within Agile ...