Top Software Engineer Jobs in London

Develop and support business software solutions for large-scale projects using Microsoft Navision and Dynamics 365, leading teams and coaching junior developers.

As a Senior Software Engineer II, you will drive the technical vision for backend solutions, enhance recipient management, and ensure system reliability.

Design and implement complex, responsive Angular web applications; own end-to-end frontend features; collaborate with UX, backend, ML, and data teams; contribute to frontend architecture, component libraries, state management, testing, CI/CD and observability; optimize performance and accessibility; support production systems and mentor other engineers within an Agile environment.

Design and implement multi-agent systems and orchestration in TypeScript to power an AI-driven video editor. Build agent workflows, interfaces between agents and the editor, plan-and-execute loops, memory/context systems, and APIs for programmatic control. Collaborate with founders and early engineers to shape product architecture, reliability strategies, and agent capabilities for autonomous editing and visual generation.

Develop high-quality backend software solutions, solving complex problems and collaborating with product teams on a scalable investment platform. Respond to technical issues in an on-call environment.

The Software Engineer will develop high-quality software, solve complex technical challenges, collaborate with the team, and maintain a robust platform for investment solutions.

Design, build, and operate enterprise-grade AI agents and agentic workflows. Integrate multi-provider AI platforms, implement orchestration, retrieval/RAG, observability, and IaC. Partner with clients to define use cases, run POCs, deploy scalable cloud-native systems, measure agent performance, and craft reusable patterns and documentation.

Join an agile development team to contribute to underpinning platform services using the Microsoft .NET stack. Learn best-practice programming, gain MCP qualifications, write clean code, collaborate with UX, product and test teams, and continuously develop technical skills.

Build and maintain scalable, reliable agentic AI systems for biomedical research, integrating LLMs, tool-calling, and data platforms. Drive technical decisions, optimize analytical workflows, deploy agents on the data platform, mentor teammates, and participate in on-call rotation to ensure performance, security, and continuous improvement.

Join Canonical as a graduate software engineer to write high-quality code across the open source stack, work on Linux system-level and application projects, engage with communities, respond to customer issues, and develop security-aware software while collaborating remotely and attending biannual in-person team sprints.

Analyze and optimize ClickHouse database performance, develop performance tests, support engineering teams, collaborate with core teams, and engage with the open-source community.

Join a small founding engineering team to design, build, and maintain scalable backend services and APIs for an FCA-regulated trading platform. Take end-to-end ownership of features, contribute to system design and architecture, maintain high code quality and testing standards, monitor and improve reliability, and participate in on-call production support. Work across the stack to ship secure, performant software and help shape the engineering culture as the company scales.

Customer-embedded principal software engineer driving production-grade solutions for strategic accounts. Translate business needs into technical designs, build and deploy end-to-end systems, influence senior stakeholders, and transition work to FDE crews. Operate in ambiguous, fast-paced environments with strong ownership, industry context, and an entrepreneurial mindset to deliver measurable business outcomes.

Lead end-to-end project lifecycles in AI and robotics, developing software solutions and integrating technologies to enhance the F&B experience at Kaikaku.

Develop software solutions for portfolio management and trading systems, focusing on scalable applications and utilizing cloud technologies. Responsibilities include coding, testing, mentoring, and participating in agile processes.

Lead the development of AI-driven solutions, architect scalable AI products, mentor junior engineers, and integrate AI across the organization.

As a Founding Engineer, you will develop innovative features, integrate AI into products, design APIs, and shape backend infrastructure while ensuring high-quality outputs and rapid feature delivery.

Build, operate, and optimize a high-throughput inference platform serving large ML models. Harden and scale inference services, drive architectural tooling decisions, collaborate with research and applied ML teams, and deliver well-tested, reliable features for production model serving.

The role involves developing and maintaining back-end systems for e-commerce platforms using .Net technologies, ensuring data delivery and optimizing application logic. Responsible for integrating API services and enhancing application performance.

Build and maintain production-ready infrastructure tooling and automation for deployment, observability, orchestration, backup/disaster recovery, and CI/CD integrations to support scalable, highly available services.

Join Watershed's sustainability AI reporting team to prototype, build, and productionize AI features (LLMs, embeddings) for information extraction and report generation. Ship production-ready, well-tested full-stack code and keep systems current with state-of-the-art AI to deliver customer-facing product features.

As a Financial Software Engineer, you will design, architect, and build systems to enhance liquidity access for Capital Market clients, while leading projects and mentoring junior members.

As a Financial Software Engineer, you'll build and improve financial systems, ensuring access to liquidity and capital for clients, while engaging in client relations and technical tasks.

Build and scale an enterprise Generative AI platform. Own large product areas across backend and frontend, develop reliable Python backend services, integrate LLMs, vector databases, and AI infrastructure, work with distributed systems and data pipelines, and ship features quickly while collaborating with product, ML, and infrastructure teams.

The Software Engineer Consultant will design and deliver secure software for UK Defence, collaborating with stakeholders and applying secure development practices.