Work with React, TypeScript, and REST API integration to build analyst-facing interfaces on a next-generation Defence Intelligence platform. The role supports a major AI-enabled Defence programme, improving operational decision-making for mission-critical users.

You'll work with TypeScript, Node.js, Go, AWS, PostgreSQL, and event-driven architecture, building AI infrastructure including vector stores and LLM orchestration. Fanvue is a Series A AI-powered creator platform connecting millions of fans with creators. This role leads the platform's monolith-to-services decomposition and AI infrastructure evolution.

Build features across a Svelte/TypeScript front end and Python back end using FastAPI, Django, PostgreSQL, and AWS. Tab is a YC-backed London travel fintech processing thousands of real-time payments per hour for over 100,000 global tourism businesses in 100+ currencies.

Use Python (FastAPI/Django) and Svelte with TypeScript to build and scale a payments platform processing 100 currencies and a discovery engine listing 100,000+ tourism businesses. Work on AWS cloud infrastructure and real-time transaction processing as part of a profitable, lean team of nine.

Build a comprehensive platform for 1,500+ charities using TypeScript, React, and Node.js. You will architect features like grant management, AI impact reporting, and safeguarding tools, and build migration tools for charities. Work in a high-autonomy team of 15.

Build customer-facing web applications with React, Next.js, Node.js, TypeScript, and Postgres. You will work on transactional flows involving payments for SwapTix, a ticket exchange platform.

Big Potato· London

You will own and evolve a Flutter companion app and confidently handle backend work on Node/TypeScript MongoDB systems. Additionally, you will maintain the gaming web platform and its integrations. The role works closely with a Senior Game Developer on the platforms behind Big Potato's games.

You will work with Astro, Sanity, GROQ, Portable Text, TypeScript, HTML, CSS, Tailwind CSS v4, Figma, SSR, serverless/edge runtimes, SQL, and CI. You will co-own the component library, content model, and rendering stack for synthesia.io, the marketing website of the world’s leading AI video platform.

You would work with TypeScript, Golang, Postgres, Kafka, Vercel, and AWS, building the product and owning greenfield development for an AI-focused B2B SaaS business automating processes for global SaaS clients. As the Engineering Lead, you would steer a highly collaborative team about to double in size.

Develop and enhance Acturis' global SaaS insurance platform using

You will work with React, TypeScript, Node.js, Express, PostgreSQL, and AWS. The team builds B2B SaaS technology used by leading UK retail brands, evolving the product.

SharkNinja★2.9 (146)· London

You’ll work with HTML, CSS, JavaScript/TypeScript, React or Vue, Git, Jira, Figma, and AI tools like Claude Enterprise, coding assistants, and automated testing. As a CodeShark, you’ll be embedded in SharkNinja’s D2C business, fixing website bugs and bridging Design and Engineering to improve consumer-facing sites. This is an early-career fixed-term role.

Ebury★3.3 (13)· London

Senior Software Engineer (Money Flows) at Ebury (London, hybrid) will work with Python, Django, FastAPI, PostgreSQL, Kafka, AWS, Kubernetes, Terraform, Jenkins, Prometheus, and Kibana. The role owns development, scalability and optimisation of the company’s multi-currency account systems, incoming funds, and outgoing payment processes on its core transactional platform. This is a global team spanning Europe and South America.

Build cross-platform mobile apps with React Native + TypeScript and native Swift/Kotlin for hardware/sensor integrations, plus offline-first architectures. You will own mobile product development for an AI startup that builds custom, AI-native software modernizing field operations.

You’ll build full-stack features with Python (FastAPI), React, Next.js, and own AWS infrastructure, data pipelines (dbt, BigQuery, Airbyte), and AI/ML initiatives (LLM agents, computer vision). Sojo is a B Corp fashion-tech startup making clothing repairs simple. As the primary full-time engineer, you’ll own architecture and shape engineering culture.

Build and maintain backend services in Node.js/TypeScript and Ruby/Rails, frontend apps in Nuxt, and infrastructure as code using AWS CDK with serverless event-driven architecture, plus Salesforce development. The "In Life" squad delivers improvements to core backend services and Digital Renewals customer journeys for Bionic, the UK's leading business comparison and switching service for small businesses.

Work with Python, Flask/FastAPI, PostgreSQL, MySQL, MongoDB, Redis, Docker, Jenkins or GitLab CI/CD, Linux shell scripts, and Git. Build and maintain automation solutions, REST APIs, and tooling for large-scale telecom network operations, supporting 5G and enterprise platform testing and monitoring.

Work with JavaScript/TypeScript, React, Redux, Golang, NodeJS, PostgreSQL, MongoDB, AWS, Terraform, Docker, and Kubernetes. You will join an internal product incubator squad focused on exploring and developing new product opportunities for Cuvva, which offers short-term car insurance through its app.

You'll develop responsive web apps with HTML5, CSS3, modern JavaScript (ES6+), React/Angular/Vue.js, REST APIs, Git, and testing frameworks; TypeScript, Next.js/Nuxt, Node.js, CI/CD, Azure/AWS are desirable. The engineering team builds modern, user-focused web applications alongside product managers, UX designers, and backend engineers. No team size is stated.

You'll use Zapier, Make, n8n, Python or JavaScript, APIs, SQL, and webhooks. You'll own the automation layer for influencer marketing, building workflows for discovery, onboarding, contracts, content tracking, reporting, and payments.

Build backend services and APIs in Python and FastAPI, working with PostgreSQL, ClickHouse, SQL, LLMs (OpenAI, Anthropic) and embeddings/vector databases. You will develop the production infrastructure and orchestration layer for agentic AI capabilities powering a data intelligence platform used by 300+ VC and PE firms for private markets insights.

You will work with HTML, CSS, JavaScript/TypeScript, React/Vue, Git, Jira, Figma, and AI tools like Claude Enterprise. As a CodeShark embedded in SharkNinja's D2C business, you fix bugs from a ticket backlog, accelerate velocity, and translate design intent into buildable requirements for websites millions visit.

You will architect and build a real-time computer vision system using C++ (17+), GPU inference (CUDA/TensorRT), OpenCV, GStreamer, gRPC/Protobuf, Kafka, Debezium, Redis, PostgreSQL, React/Next.js, FastAPI, Docker, Ansible, and Azure. The project is AI4Fibres, an AI-powered textile recycling system for transforming garment waste. No team size is stated.

Design, develop, and deploy AI solutions using C# or Python, Azure services, FastAPI, LangChain, and vector databases. The role is on a new financial-sector AI team of 20, building production-scale GenAI, LLMs, chatbots, and agents. You will integrate AI into existing systems and analyse large datasets.

You will build frontend applications with React, TypeScript, JavaScript (ES6+), Material UI, WebSockets, and GraphQL. The company creates real-time products for enterprise customers in specialised financial markets. You join a small, experienced engineering team with significant ownership.