Top Software Engineer Jobs in London

Lead design and delivery of reliability frameworks, tooling, and platform capabilities to improve uptime, observability, and operational maturity. Embed reliability into services, define observability and incident practices, contribute to production code, mentor engineers, drive cross-team technical direction, and participate in on-call rotations while reducing operational load through automation and standards.

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.

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

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

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.

Hands-on Staff Software Engineer owning core product architecture and delivery. Design multi-component systems, write code, produce usable design docs, build AI-powered features (RAG, function calling, evaluation), set tooling and patterns, manage cross-team dependencies, and mentor/hire engineers.

Senior SDET who contributes across frontend and backend systems by building and maintaining features with a strong testing mindset. Develop and maintain automated tests, improve test coverage and CI/CD, investigate bugs, support regulatory and compliance testing strategies, and balance automation with exploratory and risk-based testing.

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.

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

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

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.

Develop and maintain the macOS endpoint client for an endpoint security product. Design features, shape architecture, review code (including agentic AI-generated code), improve build/deploy/test automation, resolve customer issues, and track macOS/security technologies while mentoring peers and owning product areas.

Lead Bloomreach Professional Services integrations: design and implement solutions using Java and modern frontend frameworks, validate scope, assess technical risks, make architectural decisions, improve DXP add-ons and documentation, coach peers, and occasionally travel to EMEA clients.

Design and develop software solutions from scratch, collaborating on government projects, and participating in the software development lifecycle.

Build and operate a managed PostgreSQL service for AI workloads: develop control plane and lifecycle automation in Go, tune PostgreSQL internals and ecosystem tooling, create migration tooling, integrate vector search, run SRE practices (SLOs, observability, incident response), and work directly with customers on architecture and escalations.

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

Hands-on operations-focused senior software engineer bridging application support and engineering. Provide L2.5 support for PHP services on EKS with MySQL, build automation and runbooks, tune observability (Datadog, Kibana, Heap), participate in on-call rotation, reduce escalations, and improve MTTR through automation, documentation, and collaboration with engineering and platform teams.

Deploy, test, and troubleshoot CHAOS software in customer environments; translate customer workflows into product requirements; design and build new software; integrate sensor data; develop and apply ML/AI solutions; collaborate with engineering teams and travel to customer sites and company offices as needed.

As a Senior Software Engineer, you will enhance our Affiliate Marketing platform through clean code, team collaboration, and mentorship, focusing on backend services and technical improvements.

Design and build web security solutions and internal infrastructure platforms. Collaborate with teams on technology research and product implementation.