Top Software Engineer Jobs in London

Develop and implement reliability features, improve system performance, provide L2 support, and create automation tools for operational stability.

As a Software Engineer on the Safeguards team, you will build systems for monitoring AI models to promote safety and prevent misuse, ensuring oversight and user well-being.

Join Uncountable's Implementations Engineering team to build software that integrates R&D lab instruments with their platform, working closely with customers and developing automated data pipelines.

Software Engineers at Jane Street engage in collaborative technology-driven work, using functional programming with OCaml and Python for various business problems.

Develop complex distributed systems using Java, Kafka, and Kubernetes. Mentor team members and contribute to all phases of the product lifecycle.

Build and improve Mozilla’s Add-ons platform, including Python/Django applications, automated moderation pipelines, reviewer tools, DevHub, internal developer platforms, and CI/CD systems. Establish engineering standards, observability, safe deployment practices, documentation, and incident response processes. Debug complex production systems, improve reliability, collaborate across distributed teams, mentor peers, and contribute to open-source development.

As a Senior Software Engineer, you will enhance the REDAPL platform, leading initiatives in data ingestion, processing, and supporting infrastructure-related projects while mentoring other engineers.

The role involves building a fraud engine for the Receive Risk team, ensuring secure and fast money reception while mitigating risks. Collaboration with various teams is essential for delivering features efficiently.

Build, optimize, and deploy production-grade low-latency pricing services and microservices for sportsbook quantitative models. Develop robust APIs and streaming interfaces, improve technical requirements, champion testing, observability, CI/CD, and automation practices, review peer solutions, plan delivery workstreams, document architecture, communicate technical concepts, and mentor junior engineers.

Leads a software development team through the full product lifecycle, including user research, product strategy, roadmap planning, application development, testing, code reviews, documentation, team performance management, budgeting, partnerships, and user support. The role also manages Agile processes, reports metrics, develops funding proposals, and participates in conferences and periodic travel.

Own the full software development lifecycle for JetBrains identity and access services. Develop and operate reliable Kotlin-based services, with some Go, supporting authentication, authorization, organizations, memberships, groups, and workspaces. Design new platform features, improve existing production systems, review code, manage integrations, and address JVM and PostgreSQL performance in distributed, multi-tenant SaaS environments.

Develop and enhance scalable enterprise SaaS solutions across the full .NET stack. Responsibilities include coding, solution design, third-party integrations, database optimization, API development, CI/CD contributions, troubleshooting, testing collaboration, peer reviews, and maintaining secure, high-quality software for automotive retailers and OEMs.

As a Platform Engineer, you'll manage cloud infrastructure, enhance developer tooling, optimize CI/CD pipelines, ensure system security, and provide support for operations, contributing to team efficiency and productivity.

Design, develop, and maintain scalable server-side components for the Joybuy online shopping experience. Implement modular microservices, APIs (GraphQL/REST), and CI/CD pipelines, contribute to architecture decisions, estimate and break down tasks, document best practices, and work onsite in London.

As a Senior Digital Assets Software Engineer, you will design and build trading systems, improve system reliability, and collaborate with traders to prototype trading strategies. Your role involves direct integration with cryptocurrency exchanges and contributing to the digital asset platform's architecture.

Build and optimise ultra-low latency Java systems for pricing, risk and trading. Design scalable, resilient architecture, support live trading, troubleshoot production incidents, and mentor junior engineers while collaborating with quants, front office and business ops.

Develop, integrate, debug, and maintain autonomy software for unmanned aircraft using C++ and Python. Integrate software with hardware, radios, sensors, and flight controllers; support SIL/HIL/VIL, lab and live flight testing; operate ground control systems; analyze flight data; troubleshoot field issues; and produce test and deployment documentation.

Senior backend engineer role building scalable, resilient Go-based backend services and APIs for cloud environments (AWS/Azure/GCP). Work with containers, Docker, Kubernetes, TDD, and performance optimisation while collaborating with client teams in a remote-first consultancy.

Responsible for building and maintaining Android applications with AI features. Focus on performance, UX design, and collaboration with backend and ML engineers.

The Software Engineer will develop and maintain cross-platform desktop applications, focusing on performance, reliability, and integration of AI features. Responsibilities include optimizing applications, managing local data, and ensuring stability on macOS and Windows.

Build and ship native Android features using Kotlin and Jetpack Compose. Design clean user flows for financial services, integrate backend APIs, improve performance and stability, use analytics and production feedback, and implement AI-assisted on-device experiences where beneficial.

As a Software Engineer in Sustaining Engineering, you will resolve complex issues related to Ubuntu and open-source software, engage with upstream communities, and develop bug fixes while maintaining close collaboration with support and product teams.

As a Python and Kubernetes Software Engineer, you will develop data analytics solutions using open source tools, collaborating with a distributed team.

The software engineer will develop and operate backend services for Snap Store and Charmhub.io, focusing on clean APIs and feature implementation.

The role involves developing software for Linux-based systems on autonomous devices, optimizing performance and ensuring reliability in various hardware environments.