Citi★3.9 (21k)· London

You will work with TypeScript, React, HTML5, CSS, JavaScript (ES6+), Chromium/Electron/OpenFin, FDC3, REST/WebSocket APIs, Kafka/Solace/Tibco, and CI/CD with Jenkins. The team delivers pricing solutions and trading GUIs for Citi’s Foreign Exchange business. You will provide technical leadership, mentor junior engineers, and drive AI integration.

Develop backend services using Node.js, Python, Java, C#, PHP, and Ruby on Rails, with databases including MySQL,

Build enterprise-grade web applications using Python (Django/FastAPI), React, TypeScript, and PostgreSQL. Develop RESTful APIs, responsive UI components, and contribute to system design, CI/CD pipelines, and performance optimization.

You’ll work with Python (Django/FastAPI), React, TypeScript, PostgreSQL, REST APIs, and CI/CD. You’ll own end-to-end feature delivery on scalable, enterprise-grade web applications.

Infosys★3.8 (17k)· London

You will work with Java, Spring Boot, Hibernate, JPA, React/Angular/Vue.js, HTML5, CSS3, JavaScript, RESTful APIs, SQL/NoSQL databases, Git, and CI/CD tools on cloud platforms (AWS, Azure, GCP). As a Senior Consultant at Infosys, a global digital services and consulting firm, you'll contribute across the consulting lifecycle—defining problems, proposing solutions, and guiding development, configuration, and deployment while mentoring teams and shaping client-focused solutions. Docker and Kubernetes experience is a plus.

This role develops generative AI applications using Java, Python, React or Angular, LangChain, LlamaIndex, Hugging Face, Docker, Kubernetes, and AWS, with tools like GitHub Copilot. You will build scalable, AI-powered solutions for Citi’s global finance operations.

Senior Java developer working with Spring Boot, J2EE, RESTful APIs, Microservices, Kubernetes or OpenShift, Angular, JavaScript, Bootstrap, HTML5, CSS3, SQL, PL/SQL, JBoss or Oracle 10gAS, Git, Maven, Jenkins. You will design, develop and enhance enterprise BSS/OSS solutions, mentoring junior developers within an Agile team.

You'll work with JavaScript, TypeScript, React, HTML5, CSS, and server-side rendering to build production web applications and responsive interfaces. As a founding engineer at Hyre AI Limited, you'll shape the frontend architecture from an early stage.

Mott MacDonald★3.9 (699)· London

You will work with CI/CD, testing, observability and secure development practices, identifying AI opportunities. You lead the Connect Projects team, building software capabilities for Mott MacDonald’s digital portfolio in the architecture, engineering and construction sector.

Work with TypeScript, Python, Node.js, Playwright, Cypress, WebdriverIO, Docker, GitHub Actions/GitLab CI, bash, and Jira to build and maintain test automation frameworks and CI pipelines for Connected TV devices.

You'll work with Azure, Kubernetes (AKS), Terraform, GitHub Actions, Prometheus, Grafana, and PowerShell to build and maintain the Azure platform and CI/CD for a 100-person fintech. As the third member of the Platform team, you'll support a 10-person dev team by improving infrastructure and making the platform easier for them to use.

You'll use TypeScript, Python, Node.js, Playwright, Cypress, or WebdriverIO, plus Docker, GitHub Actions/GitLab CI, and bash. The Quality Engineering team builds test-automation frameworks and CI pipelines that run on real Connected TV devices, targeting global TV users.

State Street★3.4 (3k)· London

You will work with ReactJS, NextJS, TypeScript, NodeJS, Java, Spring Boot, Docker, and AWS to build cloud-native microservices. The role involves modernizing legacy platforms and developing enterprise-scale applications for a financial services firm. You will also mentor junior developers.

You will work with Angular, TypeScript, HTML5, Java, Spring Boot, REST/GraphQL, MongoDB/MSSQL, Kafka, and AI coding agents like Copilot and Devin. This role is on Citi’s Banking Technology team building a microservices-based web platform for senior bankers as part of the Opus Capital Management strategic transformation.

You will work with SharePoint Subscription Edition, SharePoint Online, SPFx, TypeScript, JavaScript, React, REST APIs, C#, .NET, Microsoft Graph, HTML5, and CSS3. You will lead migration of 2016 on‑premise solutions to modern platforms, design custom solutions, and provide technical leadership for a prestigious US law firm’s intranet and SharePoint environment.

Citi★3.9 (21k)· London

Design and build enterprise web application platforms using Angular, TypeScript, Java, Spring Boot, REST/GraphQL, MongoDB/MSSQL, and Kafka. The Banking Technology team delivers the Opus Capital Management strategic transformation, building a microservices platform used by senior bankers globally. This VP role leads a small, high-autonomy squad within an agile delivery team.

Java, Spring Boot, React/Angular/Vue.js, PostgreSQL/MySQL, REST APIs, AWS/Azure/GCP, Docker/Kubernetes, Git, Maven/Gradle, and CI/CD. You will design, code, test, and maintain scalable Java applications for mission-critical systems as part of an agile squad.

You will work with Vue.js, Vuex, Pinia, Vite, TypeScript, and real-time data tools (WebSockets, SSE) to build high-performance trading UIs. The role is on the team that continuously improves Interactive Brokers’ critical platform for automated trade execution and custody across global markets.

You will work with Vue.js, React, HTML5, CSS, SASS, ES6 JavaScript, and Webpack. The firm is a UK digital technology leader delivering digital transformation for PE-backed and high-growth companies. You will join the engineering team, leading front-end strategy and documentation.

Grid Dynamics★3.4 (19)· London

Build high-performance React and TypeScript trading applications using WebSockets, RSocket, and streaming market data. Work within an embedded team modernising a Tier 1 investment bank’s electronic trading platforms, migrating legacy Angular apps to React. Collaborate with backend Java engineers on mission-critical front-office systems.

Citi★3.9 (21k)· London

Build and scale AI-powered financial systems using Java, Spring, React/Angular, Python, FastAPI, Docker, and GitHub Copilot within Citi’s global tech environment. You will design generative AI agents, LLM workflows, and RAG pipelines while working on enterprise microservices, mobile, or front-end development. This role is for an individual contributor on an agile team.

Design and build full-stack applications using Java and React, working with Azure cloud services, Terraform, and CI/CD pipelines. The team is building a next-generation AI digital platform for global STEM workforce solutions.

This Web Designer role uses HTML, CSS, JavaScript, Figma, Adobe XD, React, Angular, Bootstrap, Node.js, Redux, AJAX, WordPress, custom PHP, MySQL, and Git. You craft visually compelling, user-friendly websites for the company, collaborating with developers and stakeholders on wireframes, prototypes, and front-end features.

Develops modern web applications using Angular, TypeScript, RxJS, and REST APIs on a cloud-native AWS platform. Works on a globally used flagship product, collaborating with product, UX, backend, and ML engineers.