176 to 200 of 203 API Design Jobs in the UK

Associates is seeking an AI Integration Engineer with active UK SC clearance for a contract position in London. The role focuses on backend development, API design, and data pipelines, with hands-on work integrating LLMs and vector databases in secure, classified environments. You will work on self-hosted ...

Essential Experience: React Next.js Strong commercial experience developing scalable backend systems using TypeScript and Node.js. Deep understanding of software architecture, API design, integration patterns and modern engineering best practices. Experience working with high-volume data platforms, data integrations and large-scale data migrations. Exposure to Databricks integrations would ...

Python Engineer to build next-generation autonomous AI agents for a major global financial services hub. You will move beyond basic chatbots to design multi-step reasoning workflows and enterprise-grade Python APIs that let AI interact directly with real-world software tools. Key Responsibilities Agentic Orchestration: Build stateful … workflows using LangGraph or LangChain . API & Backend Engineering: Write robust Python backends enabling LLMs to execute Function Calling and tool-use. Context & Memory: Optimize prompt engineering, context windows, and retrieval systems (RAG). What You Need Strong Python software development experience. Hands-on experience with GenAI frameworks ( LangGraph ...

programming experience. Technology/programming skills in Rust, C++, Java, KDB, Python, and SQL. Experience with messaging and data serialization technologies, market data processing, API design, latency optimization, code testing, build and deployment tools. Experience taking ownership of existing technologies, building new ones, and performing technology migrations. Working ...

programming experience. Technology/programming skills in Rust, C++, Java, KDB, Python, SQL. Extensive experience in messaging and data serialization technologies, market data processing, API design, latency optimization, code testing, build and deployment tools. Experience in taking ownership of existing technologies, building new ones, and performing technology migrations. ...

responsible for writing production-grade code and guiding engineers through mentorship. You should have a strong background in JavaScript and TypeScript, comfortable with API designs and relational databases. This hybrid position demands both technical and managerial skills, emphasizing the development of a healthy engineering culture. #J-18808-Ljbffr ...

enabled technology stack, developing prototypes and guiding client adoption. You will collaborate with the Lab team and financial services clients, research emerging tools, and design practical solutions that connect data, tools and user intent to automate workflows. The role demands strong engineering and consulting experience, with emphasis on architecture … API design, #J-18808-Ljbffr ...

Mimica is seeking an experienced backend engineer to scale the Mimica platform (MERN stack). You will design scalable architecture, build and optimize backend services and APIs, and improve performance and reliability. As part of our early engineering team, you’ll influence technical direction, participate in architecture decisions … development—from API design to deployment and monitoring. #J-18808-Ljbffr ...

global technology company in London seeking a Lead Staff Software Engineer to own backend systems for a high-traffic data platform. You will design, build, and operate core services, mentor engineers, and collaborate across teams to drive technical direction in a fast-paced environment. You will lead a growing … engineering effort, run 1:1s, and participate in hiring to grow the London team. Strong experience with C#/.NET, SQL, and API design is highly valued. #J-18808-Ljbffr ...

teams, mentor senior engineers, and drive step-change impact across business-critical, scientific, and R&D domains.## **Key Responsibilities*** Provide technical leadership in the design and architecture of large-scale, production-grade ML systems and platforms across the organisation.* Own end-to-end delivery of complex ML solutions — from … scientific problem framing and algorithm design through to deployment, operationalisation, and product delivery.* Apply advanced machine learning science to develop novel algorithms and models, ensuring they are rigorously validated and deployed as scalable, reliable, production-grade products.* Bridge the gap between scientific research and enterprise deployment — taking ML innovations ...

Product team to deliver highly efficient systems. You would also: Collaborate with product managers, architects, and other stakeholders to define technical requirements and design, develop, and maintain backend systems that power our access control and security solutions. Evaluate , develop, and implement AI-powered tools and solutions to enhance products … services. Stay current with emerging AI technologies and provide technical leadership on the adoption of AI best practices across the team and participate in API design discussions and contribute to the evolution of our platform. Lead and assist a team of backend engineers, fostering a collaborative, high-performing ...

engineering leadership to influence technical architecture decisions, ensuring solutions are scalable, maintainable, and aligned with platform direction. Ensure delivery quality through close collaboration with design, engineering, and QA - holding a high bar for what ships. Launch & Growth Own the end-to-end launch of significant features and capabilities, partnering … card scheme rules (Visa, Mastercard), authorisation and settlement flows, interchange, and regulatory frameworks. Strong technical fluency - ability to engage with engineering teams on architecture, API design, and system integration decisions. Demonstrated experience mentoring or coaching other product managers. Excellent stakeholder management skills with experience influencing senior leaders ...

Doist in London is seeking a Senior Product Engineer who shapes product direction by starting from user problems and owning features from API design to infrastructure. You will work with Slack/React stack, TypeScript, and AI-powered features across the stack. You will collaborate with sales ...

Required 7+ years' experience, including 4+ years of Python Solid experience building a product and rapidly iterating according to user feedback Good eye for API design, focused on scalability and reliability Familiarity with equity and/or fixed income products (in particular pricing/analytics) Desirable Front-office ...

Senior Software Engineer II , you will work with a passionate team that delivers scalable, reliable, and innovative solutions that accelerate scientific discovery. Key responsibilities: Design and implement graph-based search services. Develop applications using Java , Spring Boot, Spring, GraphQL , and GraphQL Federation . Integrate with databases, web services … Proven track record building scalable backend systems and APIs. Strong expertise in Java and the Spring Boot ecosystem . Hands-on experience with GraphQL API/REST APIs design. Solid background in cloud-native architectures with AWS and Kubernetes (EKS) . An advocate of best practices for rapid development ...

infrastructure in a hybrid work environment. The ideal candidate will have a strong background in distributed systems, particularly with Rust, and possess skills in API design and implementation. Join Neara to help shape new solutions in the financial sector, ensuring reliability and compliance while working with innovative technologies. ...

high-availability systems. You will collaborate across product and operations to deliver robust services that power our bitcoin-based offerings. The role emphasizes API design, modular libraries, performance improvements, and internal tooling, with a strong focus on code quality through reviews. Remote-friendly within Europe/US time ...

time, AI-native platform for in-store grocery experiences. We seek a senior backend-focused engineer who can own end-to-end delivery from API design to production, partnering with Product and Platform teams to ship complex, customer-facing features at pace. You will work in a fast ...

Integration Technology Architect on the adoption of Hybrid Integration or an iPaaS solutions with a particular focus on Mulesoft Anypoint platform that includes API Designer, AP manager and API studio • To be responsible for the definition and delivery of the Integration Technology aspects of the projects, to include … timely production of architectural designs and documentation • Become a key contributor and advocate of Microservice, API Management and how to incorporate AI • You will have the opportunity to work with Mulesoft and also our wider Capgemini teams on large programs that includes multiple technology streams and complex architecture ...

cases. You will also be accountable for the end‐to‐end engineering of GenAI and ML platforms, embedding governance, observability and operational resilience by design, hile enabling teams to deploy and run AI solutions with clarity, assurance and accountability at scale. To be successful as an AI Ops Platform … services such as Amazon Bedrock for foundation models, agent orchestration patterns, Lambda and Step Functions, alongside demonstrated Python engineering capability and secure microservices and API design. AI governance, observability and cost optimisation, embedding governance by design through policy as code, alignment to model risk framework expectations, lifecycle traceability ...

principles , reusable patterns, integration standards and guardrails for the domain and work closely with the development teams to implement the same • Drive domain APIs design and adoption • Evaluate different solution options for business requirements and recommend best option to move forward • Keeping track of industry developments, conducting … incorporate best in class practices and methodologies and sharing the same with team and stakeholders. • Chair and run governance forums - Architecture review forum, tech design authority to provide guidance and govern that investment dollars actually move towards target state • Align architecture across different domains within bank from integration standard ...

have opportunities to contribute to other initiatives that directly advance our core values and support you in elevating your craft. How You’ll Contribute: Design Secure Systems: Partner with engineering teams to conduct threat modeling. You’ll ensure security is "baked‐in" to new features from the first line … attack vectors. How We Thrive: You’ll work with a team of talented engineers with a variety of areas of expertise, from devops to design, architecture to accessibility. The team’s experience level ranges from seasoned developers with well over a decade in industry to junior developers and contractors ...

Role: We are seeking an experienced Full-Stack Engineer (5-7 years) to join a leading global financial institution in London. You will design, build, and maintain high-performance, cloud-native applications supporting critical financial operations. Key Responsibilities: Design and deliver end-to-end applications using Java (Spring … proficiency in Java, Spring Boot, and ReactJS . Hands-on experience with AWS, Kubernetes, and Kafka . Strong grasp of multithreading, microservices architecture, and API design. Financial services, Investment Banking, or Risk domain experience is highly advantageous. Ability to work from the London office 3 days per week . ...

performance. System Architecture: Convert complex functional and non-functional requirements into elegant, high-performance, and resilient system designs across AWS infrastructure. Build the Foundation: Design and develop reusable libraries, APIs, and real-time Kafka data pipelines to be leveraged by engineering teams across the entire bank. Stakeholder Partnership: Engage … strategies from scratch. Excellent communicator and building teams. Modern Practices: A strong advocate for Test-Driven Development (TDD) , automated test frameworks, mocking, stubbing, and API design. Adaptability: The ability to rapidly translate complex business requirements into technical solutions, and a proven track record of supporting and maintaining code written ...

drive architectural decisions will be essential. Responsibilities Define and maintain the end-to-end solution architecture across the rewards portal and wider Salesforce ecosystem. Design integration patterns across Salesforce, customer identity, APIs, mobile applications and enterprise platforms. Translate business and technical requirements into scalable, resilient and maintainable solution designs. … Define the architecture for SSO, customer identity integration and associated authentication journeys. Review and assure API designs, data flows, integration components and system dependencies. Support the design of mobile and in-app webview customer experiences. Produce architecture artefacts, solution options, design decisions and technical roadmaps. Coordinate suppliers ...