Top Software Engineer Jobs in London

Optimize Ubuntu integration across latest IoT and server-class hardware, lead customer engagements, and work with open source communities in a remote, collaborative environment.

As a Software Support Engineer, you will troubleshoot and resolve complex issues related to Ubuntu and open source technologies, collaborate with teams, and contribute to community development.

As a Senior Blockchain Engineer, you will design and optimize smart contracts and blockchain infrastructure, collaborate with teams to ensure secure solutions, and lead development efforts in the DeFi ecosystem. You will analyze technologies, mentor staff, and enhance performance while maintaining security best practices.

The role involves designing, developing, and maintaining high-throughput systems for the billing platform, collaborating with teams, leading technical discussions, and mentoring other engineers.

The Sr. Software Engineer will develop public APIs, build integrations with HRIS, maintain platform services, and enhance code quality using Generative AI tools.

Develop and improve Firefox desktop features for installs, updates, and OS integration. Implement platform-specific enhancements (Windows/macOS), debug complex issues, participate in design and code reviews, collaborate with a distributed team, and use data to guide product decisions.

Lead architecture and multi-quarter initiatives for Tempo, Grafana's distributed tracing backend. Own ingestion, storage, query, APIs, and operational SLOs; mentor engineers, participate in on-call, collaborate with product and sibling teams, and contribute to the open-source project to improve performance, scalability, and AI/agent-friendly interfaces.

Join Reedsy to develop and improve a collaborative word processor, adding features and ensuring performance and security for users.

Design and maintain Golang infrastructure services for the Confluent Cloud Platform, ensuring performance, availability, and capacity planning of the service.

Work hands-on in a large, mature C++ (Windows/MFC) codebase to own and modernize features and subsystems, refactor legacy components, optimize performance-sensitive spectral algorithms, and collaborate with engineers and domain experts to ensure correctness, maintainability, and backward compatibility.

Lead development of ClickHouse's Python connector and SDKs, build integrations with orchestration and transformation tools, drive AI/LLM integration strategy for production data workflows, engage with open-source community, and collaborate across product and platform teams to deliver enterprise-grade data integrations.

The Senior Software Engineer will architect and develop the Solver network, ensuring performance, collaborating with teams, and leading engineering standards.

As a Lead Software Engineer at Anima, you will enhance existing products and develop new ones focused on healthcare technology. You will work with various technologies, join customer calls, and potentially transition into a managerial role while impacting patient care.

Lead design and build of API-first product platforms and high-scale APIs consumed by internal teams, external integrations, and AI agents. Drive API standards, reliability, observability, and scalability; develop agentic workflows and reduce systemic technical risk while mentoring senior engineers.

As a Staff Software Engineer on the Developer Platform team, you will enhance CI/CD pipelines, improve developer experience, and productionize AI tooling while mentoring teammates and collaborating with engineering leaders.

The Senior Software Engineer will design and architect scalable software solutions, mentor engineers, drive technical decisions, and improve engineering practices within the team.

Lead design and delivery of core platform systems for an AI-driven insurance ecosystem. Build scalable backend services, APIs, workflow engines, and integration layers; define standards for reliability, observability, and extensibility; mentor engineers; collaborate with product, operations, QA, and DevOps; own production stability, incident response, and reliable releases.

As a Software Development Engineer II, you will develop and maintain web services for navigation solutions, ensuring reliability and performance while collaborating with the team.

The Senior Software Engineer will focus on backend development, designing and maintaining APIs and services, collaborating on features, and enhancing integrations at Motion.

As a Senior SDET, you will enhance testing practices, improve CI pipelines, mentor engineers, and ensure platform reliability through comprehensive testing strategies.

The Staff Software Engineer will develop AI tools integrated with game engines and services, focusing on C++ and automation for game development.

Senior Software Engineer will be a founding member of a Learner Experience pod owning end-to-end delivery: discovery, solution design, production, iteration and outcome measurement. Work across full stack with strong front-end/UX focus, use AI-assisted development, uphold TDD and code review standards, coach peers, and collaborate closely with non-technical stakeholders to shape impactful edtech features.

As a Senior Software Engineer, you'll enhance the Affiliate Marketing platform by designing reliable services, mentoring engineers, and ensuring system efficiency using Agile methodologies.

Design and build scalable applications using JavaScript or Python, implement data storage solutions, optimise performance, ensure testing and CI/CD practices, collaborate with clients and technical leaders, and maintain high code quality through reviews and agile delivery.

Lead backend and edge/IoT engineering, implementing scalable solutions and mentoring team members while collaborating with Data Science teams.