Build scalable, high-performance backend services and reliable APIs using C# and .NET as part of a fast-paced engineering team.

You'll work with Python, SQL, ETL/ELT, FastAPI, and AI/LLMs to build a mission‑critical Data Migration Platform that connects to legacy CRMs and onboard financial agencies at scale.

Write Python and FastAPI to build a real-time intelligence platform for private markets, used by venture capital and private equity firms to analyze live data and make faster investment decisions.

Developers use C#/.NET, Java, or Python, along with SQL databases and cloud platforms like Azure or AWS. The role involves problem-solving and communicating with technical and non-technical audiences, with no specific project or team scope detailed.

This role involves working with Thermo Fisher SampleManager (v12.1/v21.3), VGL, C#, .NET Framework, SQL, REST/SOAP services, XML, and Oracle/PostgreSQL databases. The position is at an IT consulting company, and responsibilities include configuring and customising SampleManager for client systems integration.

You will work with Java, Spring Boot, Hibernate, REST APIs, microservices, Spring MVC, Spring Data JPA, Spring Security, and SQL databases (MySQL/PostgreSQL). You will design, develop, and maintain scalable Java-based applications and microservices for enterprise clients as part of a UK-based IT consultancy serving Fortune 500 and FTSE 100 companies.

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.

Samsara★3.6 (32)· London

Work with Golang, TypeScript, React, GraphQL, and React Native. As a new grad, you’ll build backend infrastructure for an IoT platform, full-stack web features, mobile app infrastructure, or embedded software that runs on Samsara hardware.

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.

Lead architecture design for scalable, secure platforms using AWS/Azure/GCP, Kubernetes, Docker, Terraform, GitHub, CI/CD, Kafka, and microservices/event-driven patterns. This role at RX Global—a global events and exhibitions company—partners with worldwide engineering and DevOps teams to align technical decisions with business goals.

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'll work with React, TypeScript, Node.js, Next.js, GraphQL, Postgres, and AWS on an AI-native platform that empowers private investors to manage their portfolios.

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.

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 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.

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.

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.

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 will work with Node.js, TypeScript, NestJS, React, AWS, Kubernetes, and Terraform on an event-driven, cloud-native architecture using EventBridge and SQS. You will design and evolve the B2B API, personalisation, and payments infrastructure for Super Payments, the fintech platform providing 0% processing fees for merchants.

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.

You will deploy ML models and engineering surrogates (e.g., deep learning on CAE/CFD/FEA data) to production environments, using Python, PyTorch, Pandas, fastAPI, Scipy, and Kubeflow. PhysicsX builds an AI-driven simulation software stack for engineering and manufacturing.