Top Software Engineer Jobs in London

You will be the first engineering hire responsible for developing a real-time AI decision-making platform for airport operations using Python and TypeScript, focusing on fault-tolerant agentic systems.

Architect and build backend systems managing billions of data points, ensuring high performance for machine learning workflows, and scaling infrastructure during hyper-growth.

As a Staff Software Engineer, you will develop user-facing features, focus on performance and usability, and collaborate with designers and product managers on high-quality code, owning features end-to-end.

Build, test and ship growth-focused user journeys and subscription funnels across web and app. Design and run experiments, implement instrumentation and tracking, own features end-to-end, collaborate with product/design/data, and improve CI/CD, testing and release workflows to increase conversion and engagement.

Lead growth-focused engineering work: implement and maintain ad tracking SDKs/MMPs, build tracking/tag manager setups, design and ship full-stack growth features, integrate CRM/lifecycle tooling, build internal automation tools (Python/Node), and collaborate with Growth, Marketing and Data to run experiments and A/B tests.

The Senior Go Developer will design, implement, and maintain scalable microservices, integrating with Kafka, while ensuring high availability and fault-tolerance.

Design and build the C++ integration layer for TV audio/video playback, integrate with native media frameworks (AVPlayer/ExoPlayer), own buffering/ABR/A-V sync, debug performance across OS and hardware, improve tooling and observability, and collaborate with platform and device teams to raise playback quality.

Lead complex projects, develop scalable software solutions, mentor junior engineers, and ensure high standards of quality, performance, and security in game features.

Senior full‑stack engineer to join a cross‑functional delivery team for a discovery-into-delivery project. Lead technical decisions, write production code, coach peers, work with clients, apply modern CI/CD, TDD and cloud-native practices, and support live systems as required. Hybrid role (2 days/week London), 6 months initially.

This role involves leading Android platform development, resolving system-level issues, deep technical triage for customer escalations, and collaborating with partners to enhance video collaboration devices.

Lead design and delivery of cloud-native Data Integration Services: define scalable data access patterns, storage integrations, dataset lifecycle and permissioning, ensure observability and governance, and mentor engineers to drive platform adoption.

Lead the development and maintenance of large-scale AI infrastructure systems, ensuring reliability and scalability while mentoring team members and collaborating with stakeholders.

Lead technical direction across platform squads, ship and operate critical platform services, improve CI/CD and delivery workflows, drive reliability (SLOs, observability, runbooks), remediate production issues, mentor engineers, and participate in on-call and incident response to raise platform quality and developer experience.

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.

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.

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 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.

As a Senior Software Engineer, you will lead your team in shipping features, making technical decisions, and mentoring others to scale products effectively.

The role involves learning from senior engineers, contributing to the Motorway platform, and using AI tools for development. It emphasizes collaboration and personal growth.

The Senior Software Engineer II will design and implement generative AI services, drive architectural standards, mentor engineers, and collaborate across teams to enhance data solutions.

As a Go Software Engineer for Identity Management, you will design, implement, and enhance identity management solutions, collaborate with a distributed team, and contribute to the development of authentication and authorization systems.

The Principal Software Engineer I will focus on improving distributed systems for Elasticsearch, managing cluster coordination, and addressing performance issues.

The role focuses on enhancing Elasticsearch's distributed systems for performance, resilience, and managing data indexing across multiple nodes while diagnosing challenges and collaborating across teams.