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.

You will work with Node.js, React, JavaScript, TypeScript, REST APIs, MySQL, Git, Next.js, Express.js, and Tailwind CSS, along with AWS or GCP cloud infrastructure. Mas & Pas Limited is the employer; no specific product or project is described in this listing.

Build scalable backend services using modern Java, TypeScript, React, and Next.js, and design GraphQL/gRPC APIs with PostgreSQL on the Monaco squad. You will create internal products enabling Spotify teams to launch, configure, and manage Premium offers, subscriptions, and pricing.

You will work with JavaScript (Angular), TypeScript, Python, FastAPI, Tailwind CSS, Docker, Kubernetes, and AWS. As part of a 13-strong Full Stack team, you'll build features for Urban Jungle’s insurance platform, collaborating with Product, Commercial, and Data.

Ledgy★0.0· London

Work with TypeScript, React, Tailwind CSS, tRPC, Node.js, MongoDB, Temporal, GCP, Terraform Cloud, Kubernetes, Docker, and GitHub Actions. Build features across the stack for Ledgy’s equity management and financial reporting platform, helping companies manage equity and compliance.

Spotify★4.1 (116)· London

As a Fullstack Engineer on the Monaco squad, you'll build end-to-end features with Java 17+, TypeScript, React, Next.js, and PostgreSQL, and develop GraphQL and gRPC APIs for Spotify's subscription business. You will create internal tools that enable teams to launch, configure, and manage Premium offers globally.

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.

Lead Engineer using Vue (frontend), Django/Laravel (backend), AWS, Stripe/Salesforce/Netsuite integrations, SOAP, REST/OpenAPI, and project tools like JIRA, GitHub. Builds and maintains the user-facing commercial platform central to customer interaction. Manages and mentors junior developers, acting as project manager for releases.

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 Docker, Docker Compose, PostgreSQL, PostGIS, Atlas migrations, Node.js, Prisma, React, TypeScript, Konva, and Tailwind CSS. You will own the architecture and technical strategy for a platform that addresses real-world problems like heat loss modelling, 2D/3D floor-plan tooling using LiDAR, and large-scale geospatial analysis.

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.

Building TypeScript, Next.js, Supabase, Vercel, Tailwind CSS, shadcn/ui, AI/LLMs, and observability tools like PostHog and Sentry. This early-stage startup redefines how companies generate, manage, and grow revenue. As a founding engineer, you shape the product and technical direction.

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.

Ledgy★0.0· London

You’ll work with TypeScript, React, Tailwind CSS, tRPC, Node.js, MongoDB, GCP, Terraform Cloud, Kubernetes, Docker, and GitHub Actions. Ledgy builds a modern equity management and financial reporting platform for private and public companies, automating complex equity workflows and reporting.

Ledgy★0.0· London

You will lead a fullstack feature team building equity management and compensation/savings features using TypeScript, React, Tailwind CSS, tRPC, Node.js, MongoDB, Temporal, Docker, GitHub Actions, GCP, Terraform Cloud, and Kubernetes. The team owns the product logic and UX for equity plans, pensions, and carry. You report to the Head of Engineering and stay hands-on with the codebase.

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).