Top Software Engineer Jobs in London

Lead design, development, deployment and maintenance of critical software systems. Own team deliverables, collaborate with product, frontend and QA, mentor junior engineers, and work across the full SDLC with CI/CD, containerisation and cloud platforms to deliver scalable, high‑quality solutions in an agile environment.

Lead technical design, build, and operate backend systems powering high-traffic web and data platforms. Serve as a Staff-level technical authority, mentor peers, drive cross-team technical direction, and own operational health, reliability, and reporting pipelines. Transition into people management, directly managing engineers and participating in hiring and performance processes.

Lead the delivery of scalable software solutions to improve patient outcomes in primary care. Collaborate across teams to define requirements and drive impactful changes.

Lead development of the Jamf Insights web application, design and implement features in a microservice architecture, build and test APIs, troubleshoot performance, produce designs, complete work end-to-end, and communicate technical concepts to stakeholders across Product, Cloud, and Support.

Design, build, and operate the Axon Alerts platform: ingest events from 1P/3P sources, enrich metadata, apply routing rules, and deliver notifications across channels. Ensure high availability and low latency, lead architecture reviews, improve observability and operational excellence, collaborate with Product and Design, and mentor other engineers.

Design, develop, test, and maintain high-performance C++ software. Lead architecture, optimize performance and memory, build multithreaded systems, write automated tests, support CI/CD, troubleshoot complex issues, mentor engineers, and collaborate with international teams.

As a DTN Software Engineer, you will develop and maintain DTN products, work on distributed systems, and collaborate with other engineers to innovate communication solutions.

Build and operate backend systems, workflow tooling, and data pipelines for lawful data access requests. Implement least-privilege access, audit trails, data minimization, and approval gates. Partner with Legal and Operations to translate requirements into secure, auditable, and operator-friendly systems. Own production reliability, testing, observability, and incident response while defining reusable privacy infrastructure.

Build and operate backend systems, workflow tooling, and data pipelines to support lawful data access requests. Implement least-privilege, audit trails, approval gates, and data-minimization. Partner with Legal and Operations, automate responsibly, and own production reliability, observability, incident response, and documentation while shaping privacy infrastructure.

Join the Financial Engineering team to develop innovative reporting solutions, enhance existing systems, support clients, and contribute to new initiatives.

Develop high-performance, real-time sports data services using C#/.NET and modern engineering practices. Apply Specification-Driven Development, ATDD/BDD, AI-assisted tooling, AWS/serverless and GitLab CI to build and maintain scalable APIs and frontend features (ideally React). Collaborate in an Agile team and translate cricket domain complexity into software solutions.

Lead developer for low-latency, high-volume equities trading systems. Build, deploy and support algorithmic trading strategies and scalable trading engine infrastructure using core Java. Work across global trading, quant and IT teams through full SDLC to improve execution performance, analytics, messaging, and time-series analysis (KDB/q).

Develop high-performance, cloud-first applications for Premium Cricket using specification-driven development (ATDD/BDD). Use C#, modern .NET, asynchronous programming and LINQ, integrate front-end React components, work with AWS/serverless and GitLab CI, and leverage AI-assisted tools to accelerate development and maintain code quality for real-time sports data services.

Build and ship production-grade AI features inside established C# .NET products: prompt and context design, LLM integration, evaluation, error handling, monitoring, and collaboration with product and engineering teams to deliver accurate, safe, measurable AI capabilities.

Work on an agile team building and maintaining mission-critical call-taking and dispatch software. Develop, document, and test features across frontend and backend using modern practices, collaborate with product and test engineers, and lead development for expansion products. Obtain required UK security vetting.

Owner of the asset discovery experience across tokens, perpetuals, and prediction markets. Design, build, and scale features for web, mobile, and browser extension platforms. Lead initiatives to add blockchain support and new products, interface with users and developers for feedback, and help grow and hire a high-performing Discovery team.

Lead the architectural vision and hands-on development of scalable, cloud-native API and event-driven systems. Drive engineering excellence across security, observability, performance, CI/CD and IaC; mentor engineers and influence cross-squad technical strategy; embed AI-driven engineering practices and build high-throughput Kafka-backed services.

Lead design and build of a greenfield, ultra-low-latency C++ trading platform covering execution, market data, order and risk management. Implement direct exchange connectivity, optimize microsecond/nanosecond performance, collaborate with traders and quants, own systems end-to-end from design through production support for live trading.

The Senior Software Engineer will architect and build backend systems, own clinical system integrations, improve performance, and shape engineering culture.

Build and scale Deliveroo's Android rendering layer for a server-driven UI platform. Design and implement client and backend systems (Kotlin, Golang, Protobuf), lead architecture and code reviews, own large initiatives and migrations, collaborate with iOS/Web/product/design teams, and mentor engineers while driving platform reliability and performance.

Develop and maintain FortiDLP server-side services, building APIs, databases, and integrations. Own features from design through delivery, write and review code and tests, ensure code quality and secure practices, collaborate cross-functionally, and support high-volume data pipelines and operational tasks as needed.

Lead architecture and technical direction for Console, a platform powering DeepLs enterprise product. Design integration contracts, access control, entitlements, and migration paths; drive standards, contract testing, DORA targets, and self-service patterns; align roadmaps with product teams and mentor engineers to raise platform quality and delivery velocity.

Build and maintain backend services for Customer Engineering: triage and fix customer-reported bugs, deliver small feature requests, create automation and tooling to reduce manual work, debug microservices and event-driven pipelines, integrate identity providers and data security platforms, instrument and monitor systems, and partner with customers and stakeholders to prevent recurring issues.

Design, develop, test, and deliver features for Webex real-time media services. Work in agile teams on microservices, participate in on-call rotations, build automated tests, and apply AI tools to improve productivity and quality.

Lead Engineer will shape technical direction and build AI-native user-facing products across the stack. Responsibilities include end-to-end delivery, cross-functional collaboration, mentoring engineers, defining engineering practices for AI-enabled development, and hands-on frontend (React/Remix/TypeScript) and backend (Golang) work.