In your role you will: Architect and implement AWS integrations using EKS (Kubernetes) and Lambda, with a focus on scalability and container orchestration. Build and manage secure REST/GraphQL APIs via API Gateway, including auth, throttling, and schema validation. Integrate with enterprise systems (e.g. SAP, Salesforce, Oracle) for both batch and real-time data flows. Use SQS, SNS, and More ❯
worlds largest enterprises. What youll be doing: Designing and developing enterprise-grade SaaS features across backend and frontend systems Building secure, scalable, and high-performing APIs and services (NestJS, GraphQL, REST) Creating data-driven dashboards and UIs with React, Next.js, and Chakra UI Translating product and design requirements into elegant, maintainable solutions Troubleshooting and optimising performance across the full stack … tooling, and processes What theyre looking for: 5+ years experience building enterprise SaaS products (ideally in cybersecurity or data-heavy environments) Strong backend development with TypeScript, NestJS, Sequelize ORM, GraphQL, REST APIs Frontend expertise with ReactJS, NextJS, Typescript, Chakra UI Experience with MySQL and NoSQL databases Familiarity with messaging/event-driven systems (Kafka) Ability to work closely with designers More ❯
browser rendering behaviour. * Experience with front-end build tools, testing frameworks (Cypress, Jest or Vitest) and CI/CD pipelines. * Strong API integration skills, consuming and integrating RESTful and GraphQL APIs, with an understanding of security mechanisms. * Proficiency with development tools including Visual Studio, VS Code, Git, and GitHub. * Solid understanding of SEO principles, structured data, content delivery strategies, as More ❯
team to create new features in the app Be part of a team to deal with any incidents Engage in coding and RFC tests Requirements: Programming skill in Python, GraphQL and MongoDB Advanced skill in building APIs Previous experience in building on the blockchain Experience in working with start ups Benefits: Competitive salary Bonus Medical, Dental and vison insurance Flexible More ❯
City of London, London, United Kingdom Hybrid / WFH Options
Bounteous
back-end development - Solid experience with Angular (preferably Angular 15+) - Hands-on experience with Next.js and React ecosystem - Familiarity with MongoDB, PostgreSQL, or other databases - Knowledge of RESTful APIs, GraphQL, and WebSockets - Experience with Git, CI/CD pipelines, and cloud platforms (GCP) Nice to Have: - Experience with Docker and container orchestration (e.g., Kubernetes) - Familiarity with testing frameworks (Jest, Mocha More ❯
back-end development - Solid experience with Angular (preferably Angular 15+) - Hands-on experience with Next.js and React ecosystem - Familiarity with MongoDB, PostgreSQL, or other databases - Knowledge of RESTful APIs, GraphQL, and WebSockets - Experience with Git, CI/CD pipelines, and cloud platforms (GCP) Nice to Have: - Experience with Docker and container orchestration (e.g., Kubernetes) - Familiarity with testing frameworks (Jest, Mocha More ❯
design. • Good understanding of responsive design and cross-browser compatibility. • Experience with build tools and version control (Vite & Git). • Experience working in an Agile team. Desirable • Experience with GraphQL and Apollo Client. Key Performance Indicators: • Successful delivery of software to agreed timeframes and standards • Proactive collaboration with other teams • Contributions to meetings, informal training and technical discussions • Contributions to More ❯
software engineering with a strong grasp of API design, cloud architecture, and scalable system design. Hands-on coding experience with modern technologies including Typescript (Node.js/React), AWS, Kubernetes, GraphQL, Kafka. Track record of working directly with clients on technical solutions, RFPs, and complex integrations. Ability to build prototypes and proof-of-concepts that validate ideas and showcase value. Expertise More ❯
City of London, London, United Kingdom Hybrid / WFH Options
Formula Recruitment
software engineering with a strong grasp of API design, cloud architecture, and scalable system design. Hands-on coding experience with modern technologies including Typescript (Node.js/React), AWS, Kubernetes, GraphQL, Kafka. Track record of working directly with clients on technical solutions, RFPs, and complex integrations. Ability to build prototypes and proof-of-concepts that validate ideas and showcase value. Expertise More ❯
Greater London, England, United Kingdom Hybrid / WFH Options
Tuza
PR reviews, and knowledge sharing. Continuously improve our engineering approach by actively engaging in retrospectives and contributing ideas to elevate the team. The tech Our stack includes React, TypeScript, GraphQL, REST, Express, Relay, Prisma, Redis, Postgres, AWS and Styled Components. We like to experiment with different technologies and libraries, particularly when building proof of concepts. Make your case, and we More ❯
Greater London, England, United Kingdom Hybrid / WFH Options
VirtueTech Recruitment Group
and .NET . Proven experience in designing and building scalable, event-driven architectures . React experience is a plus , particularly for building modern user interfaces. Proficiency in SQL , with GraphQL and Redux being beneficial. Experience in software development best practices, performance optimization, and debugging . Strong analytical skills for solving complex technical challenges. Excellent communication and stakeholder management skills. Financial More ❯
lead role Experience developing large-scale business-critical SaaS applications In-depth knowledge of the React and React Native frameworks Excellent programming skills in JavaScript, preferably with TypeScript and GraphQL experience A good understanding of the Android and iOS platforms Experience with frontend testing frameworks Familiarity with modern front-end build pipelines and tooling Understanding of mobile UI/UX More ❯
City of London, London, United Kingdom Hybrid / WFH Options
Reward Gateway
lead role Experience developing large-scale business-critical SaaS applications In-depth knowledge of the React and React Native frameworks Excellent programming skills in JavaScript, preferably with TypeScript and GraphQL experience A good understanding of the Android and iOS platforms Experience with frontend testing frameworks Familiarity with modern front-end build pipelines and tooling Understanding of mobile UI/UX More ❯
clear, pragmatic communication style Experience leading complex technical projects or products, either in a company, startup, or open-source community Bonus points if you’ve worked on privacy tech, GraphQL, OAuth, embedded systems, or large-scale data pipelines. 🌍 Why You Might Love It: ✅ A bold mission with global impact ✅ Remote-first setup (EST to CET) + offices in Berlin & multiple More ❯
City of London, London, United Kingdom Hybrid / WFH Options
Cavendish Professionals
clear, pragmatic communication style Experience leading complex technical projects or products, either in a company, startup, or open-source community Bonus points if you’ve worked on privacy tech, GraphQL, OAuth, embedded systems, or large-scale data pipelines. 🌍 Why You Might Love It: ✅ A bold mission with global impact ✅ Remote-first setup (EST to CET) + offices in Berlin & multiple More ❯
Trading UI Engineer – Front Office JavaScript, React, typescript, NodeJS, Tailwind, GraphQL, ApolloQL, Webpack, Cypress, HTML, CSS, REST, Data Visualisation, API. Real Time Trading Software, UI Development Perm Role – London – Onsite. £80000 - £100000 plus bonus Harrington Starr has partnered up with a Global Investment Bank in the City of London who are looking to hire a Senior UI Trading Software Developer … Key Tech Stack: Extensive React UI Development. Solid JavaScript programming Experience with Typescript Experience with Data Visualisation development. HTML and C55 Experience in Real Time trading application. Experience with GraphQL RESTful API development. BSc with Computer Science, Engineering or Mathematics. With a generous Basic Salary there is also a very healthy bonus scheme available including a number of other benefits. More ❯
Trading UI Engineer – Front Office JavaScript, React, typescript, NodeJS, Tailwind, GraphQL, ApolloQL, Webpack, Cypress, HTML, CSS, REST, Data Visualisation, API. Real Time Trading Software, UI Development Perm Role – London – Onsite. £80000 - £100000 plus bonus Harrington Starr has partnered up with a Global Investment Bank in the City of London who are looking to hire a Senior UI Trading Software Developer … Key Tech Stack: Extensive React UI Development. Solid JavaScript programming Experience with Typescript Experience with Data Visualisation development. HTML and C55 Experience in Real Time trading application. Experience with GraphQL RESTful API development. BSc with Computer Science, Engineering or Mathematics. With a generous Basic Salary there is also a very healthy bonus scheme available including a number of other benefits. More ❯
london (city of london), south east england, united kingdom
Harrington Starr
Trading UI Engineer – Front Office JavaScript, React, typescript, NodeJS, Tailwind, GraphQL, ApolloQL, Webpack, Cypress, HTML, CSS, REST, Data Visualisation, API. Real Time Trading Software, UI Development Perm Role – London – Onsite. £80000 - £100000 plus bonus Harrington Starr has partnered up with a Global Investment Bank in the City of London who are looking to hire a Senior UI Trading Software Developer … Key Tech Stack: Extensive React UI Development. Solid JavaScript programming Experience with Typescript Experience with Data Visualisation development. HTML and C55 Experience in Real Time trading application. Experience with GraphQL RESTful API development. BSc with Computer Science, Engineering or Mathematics. With a generous Basic Salary there is also a very healthy bonus scheme available including a number of other benefits. More ❯
Trading UI Engineer – Front Office JavaScript, React, typescript, NodeJS, Tailwind, GraphQL, ApolloQL, Webpack, Cypress, HTML, CSS, REST, Data Visualisation, API. Real Time Trading Software, UI Development Perm Role – London – Onsite. £80000 - £100000 plus bonus Harrington Starr has partnered up with a Global Investment Bank in the City of London who are looking to hire a Senior UI Trading Software Developer … Key Tech Stack: Extensive React UI Development. Solid JavaScript programming Experience with Typescript Experience with Data Visualisation development. HTML and C55 Experience in Real Time trading application. Experience with GraphQL RESTful API development. BSc with Computer Science, Engineering or Mathematics. With a generous Basic Salary there is also a very healthy bonus scheme available including a number of other benefits. More ❯
interface to the core data system, directly influencing mission-critical trading and risk infrastructure. You will work hands-on with modern technologies such as Python, AWS, Kafka, Redis, and GraphQL to build robust, production-grade solutions. Collaboration with top-tier engineers and quantitative specialists will be central to your role as you deliver tools that power trading and risk management. … at a top-tier firm BS or higher in Computer Science, Mathematics, or related field Experience with databases, ORM models, and ETL workflows Familiarity with AWS, Kafka, Redis, and GraphQL Background in financial reference data and large-scale systems More ❯
compliance sector. Their platform integrates hardware and software to provide real-time insights and automated reporting across multiple environments. They’re seeking a Backend Developer with strong Node.js and GraphQL experience to help build and refine APIs powering multiple applications (web and mobile). You’ll work within a small, focused team, supporting new product features and data integrations. Tech … Stack: Node.js (essential) GraphQL (essential) TypeScript Experience designing and maintaining scalable APIs Familiarity with microservices or cloud-based architecture (bonus) You’ll be: Helping build secure, performant services used across a growing platform On-site 5 days per week in London for close collaboration. If you’re a hands-on Node.js engineer who enjoys solving real-world problems in fast More ❯
field and operations teams. You’ll be part of a small, skilled engineering group, building performant mobile experiences that function reliably without constant connectivity. Tech Stack: React Native (essential) GraphQL API integration Proven experience building offline-capable mobile apps TypeScript or Expo familiarity is a plus You’ll be: Working under a senior team lead in a collaborative environment Contributing More ❯
knowledge with server-side languages and frameworks (e.g. Java/SpringBoot) Excellent knowledge with front-end languages and frameworks (e.g. typescript/react) Good knowledge of integration technologies (e.g. GraphQL, REST etc..) Experience in developing, debugging, and maintaining code with modern programming languages and database querying languages Solid understanding of agile methodologies such as CI/CD, Applicant Resiliency, and More ❯
london, south east england, united kingdom Hybrid / WFH Options
Bounteous
back-end development - Solid experience with Angular (preferably Angular 15+) - Hands-on experience with Next.js and React ecosystem - Familiarity with MongoDB, PostgreSQL, or other databases - Knowledge of RESTful APIs, GraphQL, and WebSockets - Experience with Git, CI/CD pipelines, and cloud platforms (GCP) Nice to Have: - Experience with Docker and container orchestration (e.g., Kubernetes) - Familiarity with testing frameworks (Jest, Mocha More ❯
