This role supports eTrading platforms using Windows/Linux, Bash, PowerShell, Python,

This Full Stack Engineering Lead role at Citi’s Finance Technology team involves hands-on development with Java, Spring Boot, Spring Cloud, React, TypeScript, Node.js, and microservices. The team is re-platforming applications to support the Finance business, focusing on building scalable solutions for regulatory and operational needs. Testing practices use Jest, Cypress, JUnit, and Mockito, with AWS or GCP experience as a plus.

React Native developer will work with JavaScript/TypeScript, APIs, and CI/CD to build and optimise mobile apps for iOS and Android. The role is with a FinTech undergoing a digital transformation programme, modernising core mobile products and improving user journeys.

Senior Kotlin backend role with full-stack exposure to Angular/React, Spring AI, reactive streams, and event-driven tools like Kafka or RabbitMQ. You'll build a data integration platform for banks, an open-source schema language, and a greenfield AI agent for autonomous orchestration.

You’ll work with C++, Java, C#, or Rust on the core team of a crypto-native prop firm that runs one of the world’s largest DeFi trading operations. As a pure individual contributor, you ship to production and can later move into trader–dev hybrid roles.

You'll work with Python, C++, Java, or Rust. The company builds security technology that combines AI, data and software to help organisations make better decisions in complex environments. You'll work directly with customers to build and deploy solutions.

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.

Relay Technologies★2.0 (9)· London

Work with Python, Rust, TypeScript, Flutter, GCP, BigQuery, Cloud Run, ML modelling and LLM inference on a logistics platform reshaping goods movement. You will own end-to-end problems from routing algorithms to real-time optimisation and operational tools.