Top Software Engineer Jobs in London

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.

As a Software Engineer in the Safeguards Foundations team, you'll design and maintain internal tools for reviewing AI safety, collaborating with various teams to optimize workflows and build essential systems.

As a Senior Full Stack Software Engineer at Entrust, you will develop, maintain, and enhance systems for secure identity verification, focusing on both frontend and backend technologies. This role emphasizes collaboration across teams and ensures high-quality product delivery while adhering to privacy and security standards.

Build systems integrating AI into UK healthcare workflows, focusing on simplicity and quality while collaborating closely with teams. Manage complex systems that clinicians rely on and improve healthcare delivery.

The Software Engineer on Mission Dev will build custom applications, design data pipelines, and collaborate closely with clients to solve complex challenges. Responsibilities include direct customer engagement and contributing to team growth.

The AI Software Engineer will develop backend services, AI components for monitoring, and maintain data pipelines while collaborating on system insights and reliability improvements. This role necessitates software development experience with AI/ML applications.

Design and implement multi-agent systems and orchestration in TypeScript to power an AI-driven video editor. Build agent workflows, interfaces between agents and the editor, plan-and-execute loops, memory/context systems, and APIs for programmatic control. Collaborate with founders and early engineers to shape product architecture, reliability strategies, and agent capabilities for autonomous editing and visual generation.

Build and maintain Python services that automate finance and operations workflows. Deliver features end-to-end, write tests, participate in code review, support production systems, collaborate with Finance/Operations stakeholders, and grow ownership of components toward senior responsibility.

As a Backend Engineer, you will build and maintain backend services, write maintainable code, review peers' work, and learn from experienced engineers while leveraging AI tools.

Design and implement scalable IAM architecture and tooling for AuraDB. Integrate enterprise SSO providers, implement auth protocols (OAuth2, OIDC, SAML, LDAP, MFA), manage lifecycle (SCIM), develop access control models (RBAC/ABAC/PBAC/ReBAC/FGA), enforce least-privilege, apply zero-trust patterns, ensure SOC 2 compliance, mentor engineers, and collaborate across product, security, and infrastructure teams.

As a Senior Software Engineer II, you will drive the technical vision for backend solutions, enhance recipient management, and ensure system reliability.