Senior Software Engineer - AI Security

**About Us** Sophos is a cybersecurity leader defending 600,000 organizations globally with an AI-driven platform and expert-led services. Sophos meets organizations wherever they are in their security maturity and grows with them to defeat cyberattacks. Its solutions combine machine learning, automation, and real-time threat intelligence with frontline human expertise from Sophos X-Ops to deliver advanced, 24/7 threat monitoring, detection, and response. Sophos offers industry-leading managed detection and response (MDR) alongside a comprehensive portfolio of cybersecurity technologies — including endpoint, network, email, and cloud security, extended detection and response (XDR), identity threat detection and response (ITDR), and next-gen SIEM. Together with expert advisory services, these capabilities help organizations proactively reduce risk and respond faster, with the visibility and scalability needed to stay ahead of evolving threats. Sophos goes to market with a global partner ecosystem, including Managed Service Providers (MSPs), Managed Security Service Providers (MSSPs), resellers and distributors, marketplace integrations, and cyber risk partners, giving organizations the flexibility to choose trusted relationships when securing their business. Sophos is headquartered in Oxford, U.K. More information is available at [](https://www.sophos.com). **Role Summary** We’re looking for a Senior Software Engineer who can own end-to-end product development — from idea to production, for our AI security team. You’ll build and ship AI-powered products (LLM-driven workflows, automation, intelligent systems) across the stack — frontend, backend. This is a high-agency, low-process role. You won’t wait for specs. You’ll define problems, make decisions, and move fast with strong engineering judgment. Your work will directly shape how we build, scale, and accelerate software using AI. ### What You Will Do - Own end-to-end product development — from idea, research, and architecture to production. - Build and ship AI-powered security products across frontend, backend, and APIs. - Develop scalable, high-quality interfaces and systems that power real user workflows. - Work with minimal specs — define problems, make decisions, and execute independently. - Collaborate when needed, but primarily operate with lean ownership and high autonomy. - Drive adoption and impact — iterate based on real usage, not just requirements. - Leverage LLMs and AI tooling to accelerate development and improve team productivity. - Continuously improve systems, code quality, and developer workflows. ### What You Will Bring We’re not looking for just a coder — we want a builder with ownership and first-principles thinking who: - Is comfortable building end-to-end products (UI, APIs, systems, deployment). - Thinks from first principles, not just patterns or frameworks. - Demonstrates high agency — takes ownership, drives clarity, and executes without waiting. - Writes clean, scalable, maintainable code with strong fundamentals. - Has experience or strong interest in AI-powered development (LLMs, agents, automation, copilots). - Uses AI tools to accelerate development and decision-making. - Can operate in low-structure, fast-moving environments with minimal PM/design dependency. - Makes pragmatic trade-offs — balances speed, quality, and long-term thinking. - Cares about shipping real products, not just building components. - Years of experience does not matter to us, but we think most devs would need 4+ years of engineering experience across frontend + backend. - Interest and knowledge of security is a plus.