Top Software Engineer Jobs in London

Develop and maintain a scalable research platform supporting distributed computation, large-scale backtesting, and rapid experimentation. Build user-friendly, reusable APIs and libraries, integrate research workflows with production deployment, and ensure high code quality via automated tests and CI/CD. Collaborate closely with researchers and engineering teams to design and implement new framework features.

The role involves building infrastructure for AI agent execution environments, ensuring system reliability and optimizing performance at scale.

Join a team building a foundational React Native platform at Hargreaves Lansdown, focusing on architecture, testing, and developer tooling.

Canonical seeks open-source enthusiasts to optimize Ubuntu for new silicon technologies, collaborating with teams and customers to enhance software quality and performance across various platforms.

The Software Engineer will design, develop, and support the MEMX Trading system software, focusing on production support during US evening hours.

The Software Engineer will develop AI solutions for defense, implement engineering patterns, collaborate with teams, and ensure high-quality code and deployments.

Dragonfly is seeking Software Engineers for various portfolio companies, focusing on crypto technologies. Engineers of all experience levels are needed across multiple stacks.

Seeking software engineers with at least 2 years of production backend experience, interested in crypto and blockchain technologies, for roles with portfolio companies.

The Software Engineer on Mission Dev will build custom applications, design data pipelines, and collaborate closely with clients to solve complex challenges. Responsibilities include direct customer engagement and contributing to team growth.

Design, build and maintain infrastructure tooling for deployment, observability, orchestration, disaster recovery and CI/CD to support scalable, highly available production systems and customer integrations.

The role involves building a large-scale event streaming platform, mentoring teams, supporting cloud-based technologies, and developing streaming applications using tools like Kafka and Flink.

The Software Engineer will develop high-performance trading systems for OTC operations, optimize trading infrastructure, and collaborate on trading strategies and workflows.

As a Software Engineer, you will design and build scalable systems for AI transcription models, improve architecture and collaborate with teams to ensure performance and stability of cutting-edge technology.

Join Checkout.com as a Golang Software Engineer, focusing on enhancing payment success rates through innovative software solutions, collaboration across teams, and applying cutting-edge technologies.

Build and maintain low-latency, high-throughput backend trading systems in Java. Develop order booking, execution, real-time risk and valuation features, optimize distributed systems for performance, and apply TDD/BDD, CI/CD and DevOps practices to deliver resilient 24/7 trading functionality.

Build and maintain APIs and systems for money movement, debug production issues, mentor engineers, and collaborate with stakeholders.

Software Engineers at Zopa focus on building scalable microservices and solving financial problems, working collaboratively with various teams.

The Software Engineer role involves developing high-quality web and mobile applications, collaborating with cross-functional teams, and ensuring core engineering practices while maintaining a strong user focus.

As a Software Engineer Consultant, you will design, develop, and maintain secure software systems for public safety, working closely with clients and multidisciplinary teams.

As a Senior Backend Engineer, you will architect and build scalable data systems using Kotlin, design distributed analytics infrastructure on AWS, and deliver analytics features for insurers, improving their risk decision-making.

The role involves tackling critical technical challenges, ensuring clear project direction, and participating in multiple technical interviews, including coding and system design.

The Senior Software Engineer will develop and maintain a large-scale calculation engine, mentor other developers, optimize performance, and support customer needs for distributed calculations.

Join the Customer Identity & Fincrime team to develop critical systems for identity verification, fraud detection, and financial security using Java and cloud technologies.

Develop high-throughput, low-latency APIs as part of a collaborative Agile team, contributing to backend services and enhancing system performance and resilience.

Design, develop, and maintain scalable backend services for pricing solutions, implement caching mechanisms, and integrate AI/ML features while collaborating in an Agile environment.