101 to 125 of 235 API Design Jobs in London

shape requirements into pragmatic, iterative delivery plans. Own the front end architecture (React + TypeScript + RxJS), including state management, observables, and data flow design for live market data (WebSockets/Server Sent Events). Design and implement modular, testable, and reusable components and design system primitives … senior/lead role. WebSockets, Server-Sent Events, WebRTC or other high performance bidirectional data streaming experience. GraphQL, Protobuf, Flatbuffers or other schema-driven API design tools. Strong RxJS (or equivalent observables experience) and reactive architecture in production systems. Proven experience with real time UIs (market data streams ...

Spring Cloud, and related ecosystem technologies. Experience developing modern user interfaces using React and/or Angular . Deep understanding of Microservices Architecture , including design, development, deployment, and support of distributed systems. Experience with Cloud-Native Development principles and cloud platforms (AWS, Azure, and/or Google Cloud Platform … . Strong knowledge of API design , system integration, and event-driven architectures. Experience in Performance Engineering , application optimization, monitoring, troubleshooting, and capacity planning. This client will only accept workers operating via a PAYE engagement model. AMS’s payroll service is in partnership with Giant, we have worked with ...

influence how customers, internal teams, applications, and AI-powered consumers interact with the Comply Data Platform for years to come. What you'll do Design end-to-end platform solutions that connect data pipelines, data products, the security master, semantic models,lakehousetechnologies, APIs, event-driven services, AI interfaces … analytics platforms. Establish architectural standards for interoperability, including API design, event contracts, data exchange patterns, versioning, and access controls. Define scalable integration patterns for customers, partners, and enterprise systems across API, streaming, batch, and self-service access channels. Create consistent interfaces that support human users, analytics tools ...

search, price optimization) into user workflows Create admin dashboards for analytics, compliance tracking, and supplier management Implement secure payment systems and escrow functionality Develop API integrations with third-party services (payment, compliance verification) Optimize platform performance and user experience Collaborate with CTO on architecture and technical decisions What … 3+ years full-stack development experience Strong PHP skills with WordPress/WooCommerce development experience Frontend proficiency with JavaScript, React, or modern frameworks Database design and optimization (MySQL/PostgreSQL) RESTful API design and integration experience Understanding of secure coding practices and GDPR compliance Ability to work ...

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 our client … 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 ...

week in the office located in London. Your Impact Guide architectural and technical direction across various teams, executing scalable solutions from design through to deployment. Solve intricate technical problems, taking ownership of mission-critical components and establishing standards of excellence. Set and maintain high-quality benchmarks for system architecture … design patterns, testing, reliability, and performance. Collaborate extensively with senior stakeholders across product, data analytics, and growth teams, aligning engineering objectives with strategic business goals. Mentor and grow team members, enhancing their technical and leadership capabilities. Facilitate team effectiveness by clarifying ambiguous challenges, eliminating obstacles, and making sound technical ...

capabilities, improving the foundations of the product, and helping define how users interact with complex energy system models. You will work closely with product, design, backend engineers, AI engineers, and energy specialists to build intuitive experiences over large datasets and complex modelling workflows. From data-heavy interfaces and interactive … make a visible impact in a small team. Responsibilities Frontend Development Deliver frontend features from implementation through to release, working closely with product and design to build high-quality user experiences. Build and deliver frontend capabilities for Scenario Builder using React and TypeScript. Implement complex UI patterns including data ...

Wealth Technology London, United Kingdom Job Description Who we’re looking for We are looking for an experienced Principal Full-Stack Software Engineer to design, build and operate production-grade capabilities across APIs, data products, enterprise integrations and tools used by agents. This is a senior individual-contributor role … engineer who can take complex problems from first idea through design, implementation, release and ongoing support. You will remain strongly hands‐on while providing technical direction across teams. You will create reusable engineering patterns, make sound architectural trade-offs, mentor other engineers and raise standards for testing, security, observability ...

private markets. We are at an early stage of the build and looking for Senior Software Engineers to partner closely with Principal Engineers to design and deliver foundational capabilities. This is a hands‐on role for someone who wants to help shape the architecture, standards, and engineering culture … platform while leveraging modern coding practices to deliver high-quality code and infrastructure. What you’ll do Design and build backend services for the platform, primarily in Go, running on AWS with Postgres as a core data store. Own features and services end-to-end: from shaping requirements ...

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. ...

design Spotify’s consumer experience—end to end, moment to moment, across every screen, platform, and partner integration. Our mission is to make listening feel effortless, personal, and joyful for billions of users around the world. That means turning complexity into clarity across hundreds of touchpoints—from our mobile … cars, and integrations where Spotify shows up every day. If it touches a consumer, we shape it. We bring deep insight into human behavior, design, and technology to craft experiences that feel intuitive, expressive, and unmistakably Spotify. Policy & Safety (P&S) is a domain within Content Platform ...

Processing, and Cash & FX. You'll act as the technical authority within delivery teams, driving architecture strategy, governance, and engineering best practice. Key Responsibilities Design modern microservices and event-driven architectures using technologies such as Kafka, REST APIs and cloud platforms. Lead architecture governance, technical reviews, non-functional requirements … Processing Strong software engineering background in Java, Spring Boot, Oracle and SQL databases. Proven experience with: Microservices architecture Event-driven systems (Kafka, MQ, Solace) API design and integration AWS and/or Snowflake Knowledge of SWIFT MT, ISO 20022 and post-trade processing workflows. Experience operating within enterprise ...

skills and experience. Essential: Strong experience delivering production-quality software, ideally using C#/.NET Strong understanding of software architecture, concurrency, distributed systems and API design Experience building or operating security-sensitive systems where correctness and auditability are critical Sound engineering judgement, balancing security, performance, reliability and delivery ...

creativity and continuous improvement. As a Lead Software Engineer at JPMorgan Chase within the Data Platform & Strategy team within Corporate Risk Technology, you will design, build, and enhance advanced data engineering solutions. You will play a pivotal role in delivering secure, stable, and scalable technology products that support … multiple technical areas. Your work will help shape the team culture and the impact of our technology solutions. Job Responsibilities: Execute creative software solutions, design, development, and technical troubleshooting to solve complex problems Develop secure, high-quality production code for data-intensive applications and review code written by others ...

impact, and the opportunity to raise the bar on engineering excellence while operating within strong security, compliance, and control expectations. 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 ...

impact, and the opportunity to raise the bar on engineering excellence while operating within strong security, compliance, and control expectations. 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 ...

typical day might look like: Develop and maintain Laravel applications with clean, efficient code Integrate third-party services and APIs into web applications Design and implement RESTful APIs and microservices Collaborate with cross-functional teams to define and implement new features Write comprehensive tests and ensure code quality Responsibilities … Develop and maintain Laravel applications with clean, efficient code Integrate third-party services and APIs into web applications Design and implement RESTful APIs and microservices Collaborate with cross-functional teams to define and implement new features Write comprehensive tests and ensure code quality Optimize application performance and scalability Stay ...

will work alongside the engineers who built Heidi, shipping AI products that change how healthcare runs. Own features from database to browser: design the data model, build the Python service, ship the React and TypeScript interface, then watch how clinicians use it and iterate. Build fast, accessible interfaces … React, TypeScript and Next.js that hold up for a GP seeing twenty patients before lunch. Design, build and run high-performance backend services in Python, with MongoDB and Redis for storage and caching. Design APIs the rest of engineering and the AI team build on, and own their ...

scale of PBs of data and hundreds of GPUs Optimize the models and pipelines on all levels, from job scheduling down to GPU kernels Design and build scalable and robust infrastructure for end-to-end machine learning applications on cloud (CoreWeave, AWS) Continuously apply and improve engineering best practices … effectively Strong collaboration and communication skills, especially with research scientists Experience with software engineering concepts and best practices (e.g., versioning, testing, CI/CD, API design, MLOps) Experience building ML models and pipelines in Python, using common libraries and frameworks (e.g., PyTorch, TensorFlow, JAX) Experience with ...

Engineer to join our team. This role is ideal for a technically strong, customer-facing engineer who can understand complex customer operations, question requirements, design scalable solutions, and build the systems needed to deploy Didero successfully. You will work directly with our enterprise and strategic customers to understand their … understand their procurement, finance, ERP, and operational workflows. Question and clarify customer requirements, identifying the underlying business need rather than blindly implementing requests. Design and build integrations with ERP, procurement, finance, and operational systems. Build backend services, APIs, data pipelines, workflow automations, and customer-specific technical solutions. Partner with ...

strike platforms, the LIUT family of ground robotic platforms, and counter-UAS systems. About the role The Senior Software Engineer (Nova Core) will design, build, and operate the backend services and platform foundations that enable reliable, secure, and maintainable C2 operations across Nova Cloud deployments. This role focuses … ship critical Nova Core backend services (e.g., common APIs, configuration service, tenant/environment lifecycle, shared domain libraries). Design stable, backward-compatible API contracts (schemas, versioning, deprecation/migration playbooks) to protect dependent services and teams. Build and evolve data models and persistence layers, including schema evolution ...

work: We're a small team that ships frequently and iterates on real partner feedback. Engineers own features from technical discovery and design through to production support. We work closely with our PM and designer to understand partner needs, and with adjacent teams (API Experience, Account Discovery … identity mapping between partner systems and Wise. The communication layer services between Wise and partners, extending them to handle new case types and workflows. API design for partner-facing endpoints. We care about consistency, documentation, and making them usable without hand-holding. Work with FinCrime, Compliance ...

also: Lead, mentor and grow a squad of developers while staying close to the code Treat non-functional requirements as part of the design from the start, not something to deal with before go-live: performance budgets, availability, security, auditability, operability and cost Design and build back … observable and supportable in production, and help run incident response and learning when things go wrong Use AI throughout the software development lifecycle, from design and build through to testing and review Help shape how AI coding agents fit into our engineering workflow, including the guardrails, review standards ...

part of a small, highly experienced engineering team responsible for transforming ambitious ideas into production-ready software. Working closely with Product, Design and AI specialists, you'll take concepts from whiteboard sketches through to prototypes, proof of concepts, MVPs and ultimately scalable products. If you enjoy solving complex problems … frontend development, backend engineering and cloud technologies to rapidly build and validate new AI-powered products. You'll be heavily involved in architecture, technical design and proof-of-concept development, collaborating directly with stakeholders to transform ideas into working software. This is a hands-on engineering role where ...

expertise as it is about analysis. What You'll get to do: Develop, maintain, and enhance microservice applications using Java 21+ and Spring Boot. Design and implement scalable, resilient, and high-performance solutions. Work with relational and OLAP databases, writing efficient SQL queries in PostgreSQL and ClickHouse. Develop code … process complex data structures to/from Kafka. Ensure best practices in microservice architectures, including API design, scalability and security. Collaborate closely with other team members, including DevOps, Front End, Product and QA Participate in code reviews, technical discussions and continuous improvement initiatives. What we’re looking ...