Top Software Engineer Jobs in London

Design, build, and operate cloud-native backend services in Go for Neo4j Aura IAM. Develop custom Kubernetes operators/controllers, drive platform architecture, and implement secure service-to-service authentication (JWT, mTLS, SPIFFE/SPIRE). Collaborate with product, infrastructure, and security teams and produce clear technical documentation.

Lead technical strategy and roadmap for developer productivity infrastructure. Design and build scalable, reliable distributed systems, build environments, package/dependency management, CI/CD and developer tooling to enable fast, reproducible builds and improve engineering workflows across a large monorepo.

The Software Engineer will manage data collection for model training, operate cloud infrastructure, and collaborate on data management strategy to enhance Speechify's AI capabilities.

The Software Engineer will design and maintain backend APIs, enhance performance, collaborate on B2B solutions, and align architecture with product strategy.

The Senior iOS Engineer will lead product decisions, enhance the iOS app, maintain app architecture, and ensure excellent user experiences.

Build and operate production-grade AI tools, agents, and workflows to accelerate product development. Partner with teams to embed agentic workflows, define guardrails and governance, measure adoption and model performance, and deliver scalable, observable, and secure AI-native capabilities.

The Senior Software Engineer will lead the architecture and development of the Zeta Marketing Platform's Addressability part, focusing on real-time data processing, mentoring developers, and collaborating across teams to build scalable solutions.

Design and build scalable serverless solutions on GCP using Node.js, React and Next.js. Map large PIM datasets to retailer formats, own microservices and deployments, champion TDD and observability, mentor engineers, and collaborate cross-functionally to deliver customer-focused sales enablement tools.

The role involves building infrastructure for AI agent execution environments, ensuring system reliability and optimizing performance at scale.

Dragonfly is seeking Software Engineers for various portfolio companies, focusing on crypto technologies. Engineers of all experience levels are needed across multiple stacks.

Seeking software engineers with at least 2 years of production backend experience, interested in crypto and blockchain technologies, for roles with portfolio companies.

The Software Engineer role involves developing high-quality web and mobile applications, collaborating with cross-functional teams, and ensuring core engineering practices while maintaining a strong user focus.

The Software Engineer will develop AI solutions for defense, implement engineering patterns, collaborate with teams, and ensure high-quality code and deployments.

As a Software Engineer Consultant, you will design, develop, and maintain secure software systems for public safety, working closely with clients and multidisciplinary teams.

Build scalable, data-driven internal tools and services in Python to measure AI impact. Lead technical strategy, own end-to-end features from requirements through deployment and observability, partner with engineering and data teams, set squad-level technical direction, and mentor junior engineers.

Build and operate production data pipelines and streaming integrations ingesting market data and asset telemetry. Partner with trading and data science teams to deliver data for forecasting models. Work with stakeholders to build integrations and analytical views and improve the data platform powering GAIA across the business.

Design and build scalable scientific software, data pipelines and APIs to support research biology and drug discovery. Collaborate with scientists, data engineers and ML/ops to enable AI/ML, search and visualization while ensuring performance, reliability and security.

Design, build and maintain Python-based systems and integrations for Risk, Finance & Compliance. Own end-to-end delivery: requirements, solution design, production deployment and support. Implement APIs, data pipelines, visualisations, data cleansing/enrichment, and platform improvements while collaborating with stakeholders and a small technical team.

Build and optimize low-level, high-performance software and cloud-scale storage systems for ML-focused data infrastructure. Design data layouts, compression strategies, and orchestration layers; drive performance engineering and systems-level improvements. Collaborate with a small team in New York or London, leveraging open-source tools and cloud warehouse architectures.

As a Graduate Software Engineer at Ebury, you will design, develop, test, and deploy software solutions, collaborating with cross-functional teams and participating in the full software development lifecycle.

Build and maintain low-latency, high-throughput backend trading systems in Java. Develop order booking, execution, real-time risk and valuation features, optimize distributed systems for performance, and apply TDD/BDD, CI/CD and DevOps practices to deliver resilient 24/7 trading functionality.

The Software Engineer will develop betting solutions, create mathematical models, automate operations, and collaborate closely with data scientists.

Develop advanced automation and visual data processing workflows using AI tools, focusing on computer vision and data streaming techniques while ensuring system reliability and scalability.

The Senior Java Software Engineer will build and maintain payment integration systems, ensuring stability and accuracy while delivering robust scalable solutions in a fast-paced environment.

Software Engineers at Zopa focus on building scalable microservices and solving financial problems, working collaboratively with various teams.