46,001 London jobs
Open tech roles based in London.
(Senior) Backend Engineer, Marketplace
Backend engineer on Wheely's Marketplace team, building the Go services behind supply/demand balancing, pricing, and driver-passenger matching for its premium ride-hailing service. Stack includes PostgreSQL, MongoDB, RabbitMQ, Redis, gRPC, and Thrift on AWS/Kubernetes, with an office-based role in West London 4 days a week.
Global Banking & Markets - Backend Developer, Systematic Market Making - London
Backend developer on Goldman Sachs' Systematic Market Making team in London, designing, building and monitoring high-performance trading strategies and tailoring algos to client needs. Core stack is Java or C++ with a low-latency, quantitative trading focus.
Software Engineer
Software engineer on WisdomTree Europe's IT team taking ownership of CUBE, the internal investment-management platform for risk and valuation. Day to day: evolving the codebase and dev experience, building full-stack Python/React research apps with LLMs and agentic workflows, and improving containers, CI/CD and observability.
Low-Latency Java Engineer for Front Office Trading
Experienced Java developer in Bonhill Partners' Fixed Income Technology team in London, building and running high-performance, event-driven, low-latency applications for front-office trading. Day to day: end-to-end ownership from dev to production, CI/CD, and Linux/Unix scripting, working closely with traders and global tech teams.
Python & C# Developer for AI-Driven Financial News
Build and optimize Python and C# systems that process news flow and financial data for external investors, applying AI to speed up analysis of information streams. Financial services experience is welcomed; the team focuses on innovation and research projects.
Senior Java Engineer - Spring Boot & Microservices Lead
Senior Java engineer at ImmigrationGPT building scalable enterprise Java/Spring Boot microservices for finance and healthcare clients in London. Day to day involves hands-on service development, agile collaboration with client stakeholders, mentoring junior developers, and contributing to architecture reviews and technical documentation.
Java Developer - Cloud, Kafka & AWS | FinTech Solutions
Java developer in London delivering client projects in a global technology consulting setting: designing and implementing solutions focused on Kafka, migrating legacy systems to AWS, and setting up CI/CD and cloud deployments, with regular client interaction.
Backend java developer in market risk
Backend Java developer building and enhancing market-risk applications at Methods, an IT services consultancy serving UK public-sector and financial clients. Day-to-day: Java/Spring and Python services, optimized SQL on large relational databases, JUnit testing, Shell/Perl scripting, and DevOps practices in an Agile squad.
Java developer in financial services
Java developer at a global technology consultancy in London, delivering transformational projects for financial-services clients — Kafka messaging, migrating legacy systems to AWS, and introducing CI/CD pipelines and cloud deployments. Core stack: Java, Spring Boot, Kafka, REST APIs, AWS, microservices.
Java Developer (Fixed Income)
Java developer on a global investment bank's Fixed Income Technology team, building and supporting mission-critical, low-latency, event-driven applications for front-office trading. Core stack: Java, Spring/Spring Boot, Kafka/MQ/AMPS, AWS, Oracle/PostgreSQL and CI/CD tooling.
Senior Java Developer
A senior engineer building scalable enterprise applications for UK clients in finance and healthcare. Day to day involves designing Java/Spring Boot microservices, working with agile teams and client stakeholders, mentoring juniors, and contributing to architecture reviews.
Software Engineer (Python) Revolut
Python engineer at Revolut building APIs, data pipelines, event consumers, and automated financial-crime quality controls for heavily regulated financial systems, working alongside data scientists and product owners. Core stack includes Python, SQL, Docker/K8s, Ansible/TeamCity. Posting lists London as location, with salary bands shown for Krakow/Poland.
Actuarial Python Developer — End-to-End Automation (12m UK)
Experienced Python developer builds end-to-end automation tools for a leading life insurer on a 12-month UK contract: designing, developing, testing and delivering solutions and carrying projects from implementation to BAU, applying IFRS17/SII regulatory knowledge.
Python developer for financial news
Python/C# developer on a Global Research Technology team in London, building and maintaining systems and algorithms that collect, process, and distribute financial news streams for investor clients, with scope to explore AI applications for news analysis.
Actuarial Python Developer - Life
12-month fixed-term contract in London with a leading life insurer, developing end-to-end Python automation tools from design and development through to BAU. Requires workplace Python experience, actuarial qualification (FIA or part-qualified), and IFRS17/SII knowledge.
Product Owner - iD Mobile App
Product Owner for the iD Mobile app (an MVNO owned by Currys PLC), owning and prioritising the backlog for iOS/Android customer journeys — taking changes from problem identification through launch, then measuring results and iterating with designers, developers, testers and external delivery partners.
Senior iOS Engineer — Remote, Family Safety & Shared UI
Six-month Inside IR35 contract (remote within the UK) for a Senior iOS Engineer building scalable iOS features and shared UI frameworks for family-safety, youth-focused apps, while advancing an AI-assisted development workflow with Cursor and Claude. Core stack: Swift, iOS.
Senior React Native Developer - Fully Remote
Senior React Native developer hired (via Pearson Carter) into the in-house team of a UK retail organisation, working fully remote on mobile apps, web platforms and backend services with React Native, React, TypeScript and C#/.NET. Includes mentoring duties; UK right to work required.
Senior React Native Developer
Senior developer in a retail organisation's in-house team, building mobile apps with React Native alongside React/TypeScript web frontends and C#/.NET backend microservices, working with MongoDB/SQL Server and retail/ePOS integrations. Fully remote; salary up to £90k.