Works with Kubernetes, Terraform, AWS/GCP/Azure, and systems languages (Rust, Go, Python) to build agent-driven automation for compute cluster lifecycle management. This team owns provisioning, updates, and decommissioning of clusters across major cloud providers and internal datacenters, ensuring high-bandwidth, secure-by-default infrastructure.

Lead a ~132-person engineering org (5 direct reports) building financial services for Africa on Python/GraphQL, Postgres/Redis, Kotlin, Swift, TypeScript/React, GCP, Kubernetes, and Terraform—including AI-powered voice and digital agents handling 10M+ monthly interactions.

You'll work with JavaScript, ElasticSearch, OpenSearch, MongoDB, Apache Kafka, EKS and Kubernetes on Ripjar's Labyrinth Screening SaaS platform, which automates detection of financial crime for banks and governments. This role leads technical decisions and architecture for scaling the platform.

Build features across Svelte/TypeScript front end and Python (FastAPI/Django) back end. Tab is a profitable YC-backed travel fintech processing thousands of hourly payments for 100,000+ global tourism businesses.

Build and ship end-to-end features using TypeScript, Vue.js/Nuxt.js, Node.js, Docker, AWS, MySQL, and AI-assisted tools like Claude. You’ll own infrastructure and deployment for &Dine’s online food marketplace connecting independent makers with customers. Join a lean engineering team of four.

Public Sector Resourcing★1.0 (1)· London

Work with Python, AWS, and Terraform to design, build, and maintain cloud-native applications. Support the National Cyber Crime Unit’s mission to disrupt online organised crime by developing AI-driven capabilities and automating operational processes within a multidisciplinary technical team.

Build and operate the distributed systems serving Claude to millions of users, using Python or Rust, Kubernetes, and cloud platforms (AWS/GCP/Azure). The Inference team handles request routing, autoscaling, and fleet orchestration across diverse AI accelerators.

You will work with Python, TypeScript, Rust, and Claude Code to build foundational infrastructure for monitoring AI models, preventing misuse, and detecting unwanted model behaviors. The Safeguards team develops systems for data storage, metrics, evaluations, and tooling for human and agentic review that operate at scale. The team size or scope is not stated.

Founding Product Platform Engineer working full-stack with Python, FastAPI, React, TypeScript, and SQL (BigQuery/Snowflake). Build the platform layer for a decision platform that helps high-stakes teams explore outcomes and understand uncertainty, translating complex AI workflows into repeatable B2B products. As the first dedicated product engineering hire, you will architect platform foundations including auth, permissions, and APIs.

You will use Python, Trio, PyTorch, TensorFlow, JAX, Kubernetes, Rust, C++, and GPU clusters. The team advances reinforcement learning for large language models, improving Claude’s autonomy, coding, and reasoning capabilities.

You will build low-latency teleoperation infrastructure using Rust, custom video protocols, distributed mesh networks, and middleware like ROS2, Zenoh, DDS. As an early hire on a three-person team, you'll own systems enabling sub-40ms remote control of humanoids and autonomous vehicles while capturing training data for AI.

Senior Full Stack Engineer working with Python (Django, FastAPI), TypeScript, React, Astro, Svelte, PostgreSQL, AWS, Terraform, and frontier AI models via Amazon Bedrock. Build and scale AI products within small cross-functional teams, owning everything from infrastructure and APIs to user-facing interfaces. Hands-on role with significant ownership, including mentoring and shaping technical direction from discovery to deployment.

Design and scale low-latency backend systems using Python, Go, or Rust, with streaming pipelines (Kafka, Flink, Spark), SQL/NoSQL data systems, and cloud infrastructure (AWS/GCP, containers, CI/CD). The team builds real-time security infrastructure that detects risk and prevents attacks inside transaction flows for wallets, exchanges, and fintech platforms.

You will work with Svelte, TypeScript, Python, FastAPI, Django, PostgreSQL, and AWS. Tab is a YC-backed London startup building a payments and discovery platform for independent tourism businesses. You will join a lean team of nine as one of the first developers.

Lead projects developing scalable web apps for global financial clients using React, TypeScript, modern CSS (Flexbox/Grid, SASS, Material UI), Redux, Webpack, and Jest/Mocha. You will mentor engineers, drive front-end strategy, and work with DevOps/CI/CD and containerisation (Docker/Kubernetes).

You will work with Rust, Flutter/Dart, gRPC, Arrow, and Postgres to design and scale distributed, mission-critical systems. The team builds an AI-enabled operations platform replacing legacy infrastructure for airports, airlines, and ground handlers. You join a small team of three engineers reporting to the CTO.

You will work with C#, .NET, Angular, Python, REST APIs, SQL/NoSQL, Docker, Kubernetes, Git, and CI/CD. The company develops highly secure software for mission-critical environments within defence, government, or national security. You will join a small, collaborative engineering team.

You will work with Python, FastAPI, PostgreSQL, ClickHouse, OpenAI, Anthropic, and production APIs. The team builds the Bloomberg of Private Markets, providing AI-powered discovery of investment opportunities for 300+ VC and PE firms. You will build backend infrastructure powering new AI features.

Full stack developers will use Python, Django, HTML5, CSS3, SASS/LESS, JavaScript, React/Angular, AWS, Ansible, and PostgreSQL. The company builds blockchain technology for the financial industry, and the role involves scaling an existing platform within a tight-knit team.

JPMorgan★3.9 (20k)· London

This role involves building the native iOS (Swift) and Android (Kotlin) mobile platform for Chase UK, a digital bank. Responsibilities include owning mobile architecture, CI/CD pipelines, testing, and mentoring iOS and Android teams apeex. The work entails collaborating with backend, product, and design teams using REST and GraphQL APIs.

Work with Google Cloud, Kubernetes, serverless, Terraform, Node.js (TypeScript), and CI/CD pipelines. You'll join the Platform Engineering team at Freetrade, an investing platform, to treat the platform itself as a product—building the foundational infrastructure, observability, and security that Freetrade's own engineers rely on to ship.

Verisk★3.5 (361)· London

Principal Engineer using TypeScript, JavaScript, Angular, Node.js, Azure or AWS, microservices, and CI/CD with Docker and Kubernetes. Builds cloud-native, large-scale software for Verisk's data, analytics, and technology platform that serves the global insurance industry. Provides technical leadership across multiple teams and products.

You’ll work with Python or Rust, Kubernetes, major clouds (AWS/GCP/Azure), distributed systems, and AI accelerators. The Inference team builds and operates the systems serving Claude, including request routing, load balancing, autoscaling, and deployment pipelines. Headquartered at Anthropic, which creates reliable, interpretable, and steerable AI systems.

React, TypeScript, JavaScript, React Hooks, ChartJS, NextJS, and REST APIs. You will join a front-office development team at a hedge fund, rebuilding a greenfield Portfolio Management Application Suite using React and JavaScript with some AI/ML.

You'll work with Python (pandas, OOP), SQL (PostgreSQL, Snowflake), CI/CD pipelines, Git, and GitHub. You'll develop and support in-house fund management tools that assist Fund Managers in managing funds for Legal & General's asset management division.