You will build and evolve customer-facing interfaces for AI Virtual Agents using React, TypeScript, Next.js and Vite, and refactor the frontend into a scalable platform with a shared component library and design system. Unitary’s factory builds custom operations agents that complete complex workflows end-to-end in customer tools.

Koinly★3.0 (1)· London

Work with React 19, TypeScript, TanStack (Router, Query, Table), Radix UI, Mantine, Tailwind CSS v4, Vite, Vitest, Storybook, Highcharts, Sentry, Bun, and RabbitMQ on a data platform that reconciles crypto transactions and tax obligations for Koinly’s web application, with a React Native mobile app joining scope later.

Senior WordPress Developer role: build bespoke WordPress sites and apps using PHP, MySQL, ACF, WooCommerce, Gutenberg, JavaScript (ES6+), SASS/SCSS, Git, Composer, npm, Vite, CI/CD. You’ll also drive AI-assisted development (RAG, MCP, Copilot) and mentor junior developers.

Work across the stack with React, TypeScript, and Node.js or Golang on privacy-focused systems and architecture that keep users' location data inaccessible. As part of Wheely's small core-engineering team, you'll collaborate with Product Managers, Designers, and Software Engineers to shape solutions from concept through production.

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.

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.

Build full-stack applications with TypeScript, React, NestJS, Prisma, PostgreSQL, and AWS on the Reap Direct team, which develops client-facing web and mobile platforms for stablecoin-powered corporate cards, payments, and expense management tools.

You will work with React, Tailwind, Node.js, tRPC, PostgreSQL, and Elasticsearch to build and scale a B2B property data platform that integrates thousands of data sources. As a hands-on lead, you will provide architectural oversight across frontend, backend, and data infrastructure while mentoring senior and mid-level engineers.

Charles Tyrwhitt★3.5 (143)· London

You'll work with HTML5, CSS3, BEM, JavaScript, jQuery, and ISML templates on a Salesforce Commerce Cloud (SiteGenesis) storefront, and migrate to a headless PWA or Storefront Next stack using React, TypeScript, Tailwind CSS, React Router, Vite, pnpm, Git, and SCAPI/REST APIs. You'll build and enhance customer-facing ecommerce features and supporting the company's future frontend architecture.

You will work with TypeScript, React, Next.js, and Vite on SoundCloud’s desktop and mobile web surfaces. You will join a three-person feature team on the Revenue Group Web Team to build and maintain user-facing features for ads, subscriptions, payments, and creator commerce.

You will work with React, TypeScript, Vite, TailwindCSS/SCSS, Node.js, NestJS, AWS (Lambda, API Gateway, S3, DynamoDB), and CI/CD tools like GitHub Actions. You’ll contribute to designing and developing eMoney and FX payment systems within the Alpha division.

Java, React (Vite, NX), Kafka/Solace/RabbitMQ, WebSockets/SSE, Rx, Kubernetes, and SQL drive a multi-year platform modernisation building real-time, low-latency, high-performance microservices for front office trading. You will combine hands-on engineering with technical leadership, shaping architecture and engineering standards.

Corpay★3.0 (944)· London

Work with React, TypeScript, Vite, TailwindCSS, Node.js, NestJS, AWS (Lambda, API Gateway, S3, DynamoDB), and CI/CD tools (GitHub Actions, CircleCI). You will design and develop secure, scalable eMoney and FX payment systems for Corpay’s Cross Border division.

Ebury★3.3 (13)· London

You will work with React, TypeScript, Python, FastAPI, Strands Agents SDK, AWS Bedrock, RAG, Ragas, Langfuse, AWS/GCP, Terraform, and Docker. You will build Flow, an internal AI agent platform that orchestrates multi-step workflows across data warehouses and services to automate business operations. The role involves end-to-end ownership of agent workflows, reasoning UIs, and cross-system integrations.

Senior UI Platform Engineer role at Jain Global using React, TypeScript, Vite, Next.js, Ant Design, AG Grid, Datadog, OpenTelemetry, Grafana, Microsoft Entra ID/Azure AD, and npm packages. The Core Platform team builds reusable frontend foundations—shared UI packages, application scaffolding, authentication/authorization integration, developer tooling, and internal platform applications (onboarding, access, service discovery).

Ebury★3.3 (13)· London

Build an AI-powered financial crime investigation platform using React, TypeScript, FastAPI, Python, LangGraph, LlamaIndex, and AWS (Bedrock, ECS, DynamoDB, OpenSearch). Design AI agent workflows and micro-frontend architecture while mentoring engineers.

Ebury★3.3 (13)· London

You will work with React 19, TypeScript, Material-UI, Python 3.13, FastAPI, LangGraph, AWS Bedrock, DynamoDB, OpenSearch, Terraform, GitHub Actions, Docker, and Kubernetes. The team is building an AI-powered financial crime investigation platform that automates screening for compliance teams. This is a full-stack, individual-contributor role.

You'll build frontend interfaces for Nevis, an AI-native wealth management platform managing $50+ billion in assets, using TypeScript, React with cutting-edge features, Vite, SCSS, and component libraries. Working closely with designers and backend engineers, you'll turn complex financial and AI data into intuitive interfaces for advisors globally, focusing on performance, accessibility, and design system development.

You'll work with React and TypeScript, using Vite, Vitest, and Cypress, building AI-powered features and advanced data visualizations for Pigment's business planning platform used by enterprises like Unilever and Coca-Cola. The Product Community team consists of approximately 30 engineers across the Product division, organized into small, focused squads working on AI capabilities, data visualizations, and design system maintenance.

JPMorgan★3.9 (20k)· London

You'll build and maintain web applications for Nutmeg (JPM Personal Investing's UK wealth management platform) using React, HTML5, CSS, JavaScript ES6, Jest/RTL, Webpack/Vite, Docker, Git, Jenkins, and GitHub Actions within a cross-functional team. The role involves delivering product features end-to-end, fixing defects, conducting code reviews, and ensuring accessibility, security, and performance standards across the web ecosystem powered by an internal React design system.

You'll work with TypeScript, React, and REST/GraphQL APIs, maintaining a component library and frontend standards for Helsing, a defence AI company protecting democracies. You'll own the UI end-to-end across multiple internal products, collaborate with backend teams (primarily Rust-based), and help mentor and grow a small frontend engineering team while establishing best practices across the organization.

Yapily★0.0· London

Yapily seeks a Principal Front End Developer to architect and lead its front-end ecosystem using React, Playwright, Vite, Node.js, Java, and Spring while mentoring the front-end team in AI-native development workflows. The role involves designing high-performance SPAs, establishing technical standards, and partnering with product and backend teams to ensure UI components—Yapily's primary client interface—meet scalability and security requirements. This open banking infrastructure platform connects companies to thousands of banks globally for data access and payment initiation.