You'll work with Java 17+, Python, Spring Boot, Oracle SQL, document-store DBs, Kubernetes, Jenkins, and GitHub Copilot. The team builds mission-critical systems providing end-to-end visibility into payment lifecycles for an investment bank. You will mentor junior engineers and lead code reviews.

Founding ML Engineer role at an early-stage consumer health-tech startup building systems for chronic disease management. You will own the technical stack end-to-end, working with Python, Bayesian/probabilistic modelling, NLP/LLM tooling, knowledge graphs, and causal inference methods. The 12-month fixed-term position involves co-designing a domain ontology and building extraction pipelines with human-in-the-loop validation, with a path to CTO.

You'll work with Python, TypeScript, AWS, PostgreSQL, and event-driven architectures building real-time software for energy trading and grid optimization. This early-stage climate tech startup is building a new platform from scratch, and as part of a small engineering team you'll own backend services, APIs, and product features end-to-end.

You will work with Rust, Python, Java, Go, C++, and a distributed systems stack involving edge computing, low-bandwidth radio links, and air-gapped networks. This company builds AI software that turns unstructured sensor data into real-time intelligence for semi-autonomous platforms. You will set technical direction across multiple teams.

You'll work with React, TypeScript, and Python (or Node.js) to build AI-driven matchmaking systems connecting pharma with medical experts. The platform processes 9M+ clinician profiles and billions of records, automating healthcare commercialization workflows for global drug development at G LNK (YC W25).

Work with Vue.js, React, or Angular, JavaScript, HTML/CSS, and Figma. You will implement features and build reusable UI components for TransPerfect's TechOps team, which delivers workflow tools and client interfaces for the GlobalLink platform.

You'll build end-to-end features for &Dine's food marketplace using Vue.js/Nuxt.js, Node.js, TypeScript, MySQL, Docker, and AWS. The platform connects independent Makers with customers seeking handmade food. You'll be part of a lean engineering team of four, owning from design to deployment and mentoring junior engineers.

You will work with Java, React, and DevOps automation to build scalable, cloud-native applications for critical business services. The role focuses on delivering high-quality software across front-end and back-end technologies in a financial services environment.

Full Stack Python Developer using Python and Claude Code to build solutions for a leading consultancy client. This fully remote six-month contract requires US/UK candidates working Eastern Time hours.

You will work with Java, C#, modern cloud and DevOps tools to build scalable, high-performance applications. The team designs and develops these applications in an Agile environment, collaborating across functions.

You will work with Java, SQL, REST APIs, event-driven architectures, Angular, and distributed systems. You will lead an existing team of 4 to 6 developers, architecting and integrating systems.

Lead, coach, and mentor engineers using Java and JavaScript frameworks. The client is a healthcare provider building modern, scalable products to deliver world-class patient experiences across the UK as part of a digital transformation.

Product Engineer role working with TypeScript and Python, owning full-stack feature development from database schema design (Postgres) to frontend interactions. You’ll build tools enabling Fortune 500 organizations to test strategies via large-scale AI simulations, collaborating directly with the CTO and CPO.

Build full-stack products from scratch using TypeScript, React, Node.js, Python, JavaScript, SQL/NoSQL databases, Google Cloud, and AI/ML/LLM tooling. The ITO builds proprietary AI infrastructure, consumer/enterprise digital products, and the data/intelligence layer for Steven.com's creator-economy operating system. You will work directly with the VP of Engineering and product leaders on features and strategy.

This Junior Software Engineer role uses Python, Node.js, PostgreSQL, MongoDB, React, and AWS to build backend services, APIs, and frontend applications while supporting commercial machine learning model deployment.

You'll work with Java (8, 17, 21), React/TypeScript (or Angular/Vue), and REST APIs to sustain current environments and deliver new capabilities across full-stack development. You will also mentor less experienced engineers through code reviews and technical guidance.

Tech Lead role using Java, Kotlin, Python, JavaScript/TypeScript, Spring, and Node.js to build cloud-based digital banking solutions. The consultancy helps clients build, launch, and run digital banks. You lead a team of engineers, contributing to system architecture, coding, and strategic decisions.

You will work with ReactJS, NodeJS, MongoDB, and AWS. The team builds a web-based SaaS platform for private equity, venture capital, and alternative investment firms to manage investing, fundraising, and operations. This senior role includes leading and mentoring junior engineers.

KPMG★3.8 (9.9k)· London

Develop web applications using C#, ASP.NET Core, TypeScript, React or Angular, and deploy on Azure Kubernetes Service with containers. You'll work on modernising tax and legal services for KPMG, building cloud-first microservices and client-facing portals for a team of 300+ technologists.

GUARDIAN NEWS & MEDIA★4.6 (7)· London

Build the Guardian Android app using Kotlin, Java, Jetpack Compose, Coroutines & Flow, MVVM, Jetpack libraries, and modular architectures. As a Staff Engineer on the Apps Experience team, you will shape technical direction, architecture, and engineering standards across multiple teams for an app used by millions.

Work with Kotlin, Java, Python, TypeScript, Kafka, Flink, Redis, and clustered Postgres on AWS/GCP to design, build, and maintain backend services for a real-time, data-driven commodity trading platform. You will own features end-to-end, optimizing pipelines for low latency and high throughput.

You will build scalable backend services using Go, Python, Rust, React, Kubernetes, Docker, and cloud platforms (AWS, GCP, Azure). The Core Platform team develops foundational services like authentication, APIs, and multi-tenancy that power Lightning AI Studio and support AI application development.

You will use React, front-end technologies, iOS/Android, Java with Spring Boot, REST APIs, Kafka, IBM MQ, and apply TDD and automated testing within Agile and DevOps practices. As part of a permanent feature team, you will design, produce, and test software for a platform, collaborating with engineers and stakeholders to support business objectives.

Senior engineers at Great Yellow design and own data pipelines (ETL, dbt, SQL) and write production code in a Cloudflare-native TypeScript/React monorepo. The team builds the data and software platform that powers a system for making regenerative land-use investable and scalable.

Build production AI products using LLMs, Agentic AI, RAG, and retrieval systems with Python or TypeScript on AWS, Azure, or GCP. You will design cloud-native architectures, evaluation pipelines, and work directly with customers to solve operational problems for industrial manufacturing, energy, and construction companies. The small engineering team ships products from 0 to 1.