Top Software Engineer Jobs in London

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.

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.

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.

As a Principal Forward Deployed Engineer, you'll deploy JetBrains Central in enterprise environments, implement AI governance, mentor teams, and advise customers on AI-native development best practices.

The Senior Software Engineer will enhance the reliability of AI systems, implement monitoring frameworks, manage failover systems, and lead incident responses, focusing on serving infrastructures for large language models.

Design, build, and ship production-ready software; decompose ambiguous problems into system architectures; modernise legacy systems and develop greenfield features; own technical decisions, testing, observability, and documentation; collaborate with product and design and ensure operational readiness.

Design and evolve systems for Motion's infrastructure, focusing on reliable and secure operations across APIs, Linux systems, and cloud environments with a focus on hands-on coding and engineering judgment.

Lead cross-product engineering work: design APIs and data models, turn ambiguous customer problems into technical plans, implement and roll out features across web, APIs, CLI, integrations, and infra, debug production issues, and raise engineering quality through docs, reviews, and mentorship.

The role involves designing, developing, and maintaining high-throughput systems for the billing platform, collaborating with teams, leading technical discussions, and mentoring other engineers.

Optimize Ubuntu integration across latest IoT and server-class hardware, lead customer engagements, and work with open source communities in a remote, collaborative environment.

As a Software Support Engineer, you will troubleshoot and resolve complex issues related to Ubuntu and open source technologies, collaborate with teams, and contribute to community development.

Build pixel-accurate UI from Figma and Claude-generated templates using TypeScript/React, and contribute to C# backend services/APIs. Establish AI-native workflows with Claude, implement telemetry, troubleshoot full-stack issues, and improve tooling and maintainability.

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

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.

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.

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.

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.