Junior C# and ASP.NET developers will use SQL, .NET Core/Framework, JavaScript and Azure to build a centralized SaaS platform for FX payments, helping financial institutions manage compliance, costs and cashflow.

You will work with Python (Django/FastAPI), TypeScript, React, Astro, Svelte, PostgreSQL, AWS, Terraform, and frontier AI models via Amazon Bedrock. You'll own technical direction, mentor engineers, and build AI products for UK public services in health, education, planning, and Parliament. The role is in small, empowered, cross-functional teams.

As a Node.js/TypeScript Engineer in Sainsbury's Martech domain, you'll work on the Multichannel Messaging Hub (MMH) team using JavaScript, TypeScript, Node.js, microservices, Kafka, Snowflake, Kubernetes, AWS Serverless, and Terraform. The team orchestrates campaign delivery across email

Work with Vue.js, React, Angular, JavaScript, HTML/CSS, Figma, and Agile (SCRUM/Kanban) to build reusable UI components and optimize performance. Join the TransPerfect TechOps team delivering the GlobalLink platform and client interfaces.

You'll work with Node.js, React, TypeScript, APIs, cloud platforms (AWS/Azure/GCP), and CI/CD tools. The role is on a product team building a high-traffic global eCommerce platform processing thousands of daily transactions, developing customer-facing features and improving performance.

Backend Engineer (Python) at a fast-scaling AI-enabled property technology business. You will build and scale backend applications using Python and FastAPI on AWS, collaborate with frontend engineers on React, and use AI-assisted development workflows like Claude and Cursor to accelerate delivery.

Python, TypeScript, React and PostgreSQL power this Senior Full Stack Developer role. The work involves building and owning a flagship AI platform that handles large-scale data processing, entity resolution and production AI workflows within a small, experienced engineering team.

Build features across Tab's Svelte/TypeScript front end and Python back end (FastAPI, Django), using PostgreSQL and AWS. The YC-backed travel fintech processes thousands of real-time payments per hour in 100+ currencies for 100,000+ tourism businesses.

Build and deploy production-grade agentic systems and RAG pipelines using Python/FastAPI and TypeScript/React. Lead the architectural development of an AI-driven agency model, replacing manual workflows with autonomous agents for the global property market.

Build AI agents, workflows, and automations using LLMs, retrieval, tool calling, Python, TypeScript, and JavaScript. The role focuses on building AI-native systems for BJAK’s AI Neobank app, applying AI to financial workflows like onboarding, KYC, risk review, and operations.

Superdrug★3.3 (3k)· London

Design polished, accessible, development-ready digital experiences for Superdrug’s website and mobile app using Figma (including components, variants, and design system patterns). Own product-design projects from problem definition through wireframing, prototyping, and high-fidelity UI, collaborating with developers, product teams, and analytics.

You will work with Azure, CI/CD pipelines, and test automation to build component-oriented front ends. As a Lead Engineer on the Digital Product Team at Canada Life UK (a financial services firm), you will set UI/UX, accessibility, and front-end performance standards and coach engineers across the product lifecycle.

You will build a fully bespoke blockchain from scratch using Rust, C++, CUDA, Python, Shell for the protocol layer; Solidity, Foundry, Hardhat for smart contracts; and TypeScript with React, Next.js, Node.js for frontends. This greenfield project powers Arena Entertainment’s digital entertainment platforms, spanning gaming, DeFi and Web3.

Zaizi★4.0 (5)· London

Building mission-critical web apps, APIs, and microservices (TypeScript, React, Node.js, Python) plus native Android/Kotlin tactical systems with AIDL IPC and CoT routers for MoD programmes. Working on edge platforms (TAK) with CI/CD (Docker, GitLab CI) and NCSC Secure by Design standards. Mentoring mid-level engineers.

Google★4.3 (6.2k)· London

You will work with C++, Java, Kotlin, TypeScript, front-end frameworks, API development, machine learning, agentic coding, and GCP. This role is in Google Labs Science, which partners with DeepMind to transform GenAI research (e.g., Co-Scientist, AlphaEvolve) into products that accelerate scientific discovery.

Guiding Reset Health's Live Platforms team, this role combines hands-on development in React Native and Kotlin with scrum master duties. The team delivers production releases in two-week sprints, handling customer setups, enhancements, bug fixes, and 2nd line support using Mongo, Git, CI/CD, Jira, and REST APIs.

Build AI systems using Python, TypeScript, React, and LLM orchestration for automated competitive intelligence monitoring clinical trials and regulatory filings in pharma/biotech. As a founding engineer, you'll own full-stack development and data pipelines while shipping production code directly to enterprise clients alongside the CTO.

Build payment-fraud investigation infrastructure using Python, TypeScript/React, GCP, Terraform, and SQL. You'll own APIs, UIs, an orchestration layer coordinating unstructured data, and AI agents for real-time verdicts, ensuring 24/7 uptime on fault-tolerant distributed systems. Join a small engineering team at a VC-backed startup scaling across billions of transactions for major UK banks.

Work daily with React, HTML, CSS, and JavaScript/TypeScript to build user-facing features for Revit tools that help architects and engineers manage content, track usage, and make decisions. Own features including advanced search, model usage dashboards, and interactive previews.

Work with React, Redux, JavaScript, and HTML/CSS to build the front end of a SaaS multi-issuer platform that automates the conception, pricing, execution, and monitoring of structured products for private banks, asset managers, and distributors.

Work on low-latency trading systems, using Java, Python, TypeScript, SystemVerilog, Raft, Kubernetes, DLT, and Angular. Projects include an FPGA-based hardware accelerator, the ALX Trading Engine, DLT solutions for TradFi, and internal tooling for a firm building trading technology for tier-1 banks.

Mintel★3.8 (40)· London

The role involves WordPress/WooCommerce development using PHP, JavaScript, React, Python, Docker, NodeJS, MySQL, ElasticSearch, and Git. The team owns the eCommerce platform and corporate websites for Mintel, a market intelligence agency that delivers data and insights to clients globally.

You'll build and maintain software across TypeScript, React, NestJS UIs, APIs and data pipelines for Treefera, a first-mile intelligence platform providing visibility into global agricultural and soft commodity supply chains using AI and satellite data. You'll own end-to-end implementation from idea to shipped product, moving fast in ambiguity while supporting reliability, documentation and customer impact across the Environmental Intelligence team.

Design product experiences across Superdrug’s website and mobile app using Figma, wireframing, prototyping, and design-system components. You will own UI/UX projects from problem definition through implementation, collaborating with developers, analysts, and product teams.

Build Python (FastAPI/Flask) features for the NHS Digital Onboarding Service (DOS) within a serverless architecture, paired with a NextJS/React client frontend. The service is part of the NHS API Platform.