Top Software Engineer Jobs in London

As a Staff Software Engineer, you'll lead development and architecture design, mentor engineers, and implement impactful projects in a fast-paced environment.

Lead the design and development of AI-powered applications, mentor engineers, and collaborate across teams while ensuring high coding standards and deployment in cloud environments.

As a Staff Software Engineer, you'll work on large-scale distributed systems, optimizing performance for AI inference, and managing complex infrastructure challenges.

Design, build, and maintain internal tools, services, and pipelines for game development. Own delivery from design through release, improve systems, write tests and docs, support studios, and drive engineering standards and reliability.

The Senior Full Stack Engineer will design and develop scalable backend services, APIs, and infrastructure while collaborating with clients and team members. Responsibilities include end-to-end delivery, Agile methodologies, and participating in a high-performing engineering team.

As a Senior Software Engineer I, you'll design, develop, and deliver the Axon Alerts platform, ensuring timely notifications and operational excellence while mentoring junior engineers.

As a Senior Software Engineer II, you will build advanced video forensics capabilities, design scalable systems, mentor engineers, and drive cross-team collaboration.

Lead design and deliver scalable XVA risk software, embed AI/ML and Generative AI into workflows, own projects end-to-end, drive architecture and Agile delivery, ensure regulatory compliance, and mentor engineering teams.

The Senior Software Engineer at Sotheby's will own systems, solve business problems pragmatically, communicate clearly across teams, and ensure code maintainability while working with distributed systems and microservices.

Design and build the Capacity and Quota Management control plane for GPU resource allocation. Implement reservation engines, quota control algorithms, APIs, rebalancing, and auto-reclamation; ensure consistency, reliability, and scalable distributed backend services.

Design, build and maintain cloud-native full-stack applications. Develop secure Node.js REST APIs and responsive Angular front ends, write automated tests, contribute to CI/CD, and support AWS/container deployments within Agile teams.

Design, build and maintain cloud-native full-stack applications. Develop secure REST APIs with Node.js/Express, build Angular front ends, write tests (Jest), contribute to CI/CD (GitLab), and support AWS container deployments.

Lead end-to-end design and implementation of Diagnostics backend: high-throughput Go services, ingestion and OpenTelemetry pipelines, ClickHouse-based storage and queries, and dashboard surfaces. Collaborate cross-team, mentor engineers, raise code-review and AI-agent workflow standards, and ensure reliability, performance, and secure data handling.

Build and scale backend systems for a large social game. Design microservices and distributed systems, implement backend best practices, ensure reliability, security, and performance, collaborate cross-functionally, drive DevOps and testing, and continuously improve processes.

Lead a small engineering team to deliver and operate large-scale Roblox game features. Drive technical planning, estimation, code quality, monitoring, releases, and mentorship while partnering cross-functionally to improve performance and player experience.

Design, build, and maintain high-performance C++ systems on Linux to support large-scale quantitative research and portfolio production. Develop distributed, scalable tooling, optimize algorithms and concurrency, collaborate with researchers and portfolio managers, and drive platform reliability and performance.

Build and maintain scalable, serverless microservices and APIs in Go; own services end-to-end from design to deployment and monitoring; use AI-powered developer tools daily; mentor engineers and improve engineering practices to support global fulfilment operations.

Build and operate backend services, data pipelines, and operator-facing web apps that ingest, process, and present real-time radar sensor data. Design secure, scalable Azure cloud infrastructure and instrumentation, influence platform architecture, and collaborate with hardware, systems, and field teams to deliver resilient, low-latency distributed systems.

Lead full‑stack product delivery for B2B features with backend emphasis: design APIs, own architecture, ship production systems, ensure testing/observability, and partner with product and platform teams to support demos, trials, and customer onboarding.

Perform software safety lifecycle tasks: hazard analyses (HARA, FMEA, FTA, STPA), derive and trace software safety requirements, review C++/Python/ROS code, define fail-safes, collaborate across teams, and support safety cases for airport deployment per ISO 26262 and SOTIF.

Build end-to-end features for DeepL Voice across frontend and backend, focusing on real-time streaming, low-latency audio, transcript stability, and AI inference integration. Prototype and scale features in a 0-to-1 environment while collaborating closely with PMs, designers, and researchers to solve product and technical challenges.

Lead and own end-to-end development of revenue-critical full-stack systems: define problems, design architectures, make pragmatic trade-offs, deploy and ensure production reliability, and translate technical constraints into business impact. Work across backend, frontend, and infra, mentoring teams and using AI-assisted tools to accelerate delivery.

Design and implement enterprise-grade full‑stack features for DeepL's Enterprise platform, owning everything from React admin UIs to C#/.NET billing logic. Architect secure identity (SSO/SCIM/SAML), subscription and provisioning flows, ensure idempotent distributed transactions, and collaborate with Sales, Product, and Finance to deliver reliable, auditable revenue systems.

Design and deliver secure, cloud-native, production-grade services. Write high-quality code while shaping architecture and technical strategy. Champion CI/CD and DevSecOps, mentor teammates, and work directly with customers to solve complex, regulated problems. Must work onsite four days per week and hold active SC clearance with DV eligibility.

Manage and scale Kubernetes clusters, automate infrastructure, optimize performance, maintain blockchain nodes, and improve system reliability while collaborating with product teams.