Top Software Engineer Jobs in London

Develop and maintain frontend software using TypeScript and modern frameworks. Implement state management, API integrations (REST, WebSockets), write tested maintainable code, follow CI/CD workflows, collaborate across teams, and apply engineering best practices and data-structure/design-pattern knowledge.

As a Software Engineer, you'll design and manage GPU/TPU infrastructure targeting AI/ML workloads, collaborating across teams to optimize performance and ensure reliability of machine learning systems.

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

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.

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

As a Backend Engineer, you'll enhance accounting integrations, improve workflows, expand global offerings, and build a scalable platform architecture.

Build and scale core observability services for high-volume telemetry ingestion, distributed storage, query engines, alerting pipelines, and AI-assisted troubleshooting. Work on reliability, performance, and production incident resolution across a cloud AI platform.

The Senior Software Engineer II will work on the Send Core team, enhancing critical infrastructure for money transactions and developing customer-facing products.

Join as an early engineer to design and build production-quality, full‑stack systems that analyze billions of AI interactions. Own architecture, ship fast at scale, set technical standards, and mentor future hires.

Own availability and performance of mission-critical services, improve scalability and observability, build platform tooling, run on-call rotations, practice blameless incident response, collaborate with product teams, and follow FinOps best practices.

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.

The Forward Deployed Software Engineer will design custom software solutions using OpenAI's APIs, work closely with customers, and provide technical expertise to solve complex problems while collaborating with various teams.

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

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.

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.

You will prototype and develop new features for cybersecurity products, collaborate with cross-functional teams, and improve existing platforms while embracing innovation.

Design, build and operate cloud-native .NET microservices on Azure. Deliver features with test-first practices, define CI/CD and IaC, ensure scalability, reliability and support SRE-driven operations.

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.

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.

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.

As a Senior Growth Software Engineer, you will enhance product adoption and user engagement through data-driven development and experimentation.

Design and develop scalable reference-data services, automate lifecycle events, build/internal and external reporting (real-time and batch), collaborate with research and execution teams, maintain CI/CD and automated testing, and integrate Python and C# components to support trading and research workflows.

Develop scalable cloud-native platforms for real-time tick data. Collaborate with researchers, architect systems, and build distributed data architectures.

Design, develop, and maintain services for Smarkets, implement monitoring, ensure code quality, mentor teammates, and collaborate on projects.