Senior Software Engineer 1

About the role

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 www.sophos.com. Role Summary The Senior Software Engineer 1 is responsible for owning medium-complexity engineering initiatives that improve the automation, tooling, cloud infrastructure, and software delivery capabilities that enable Sophos engineering teams to build, test, and deliver cloud-based services reliably, securely, and at scale. This is a hands-on engineering role requiring strong technical depth across platform engineering, DevOps, cloud infrastructure, CI/CD, Kubernetes, and developer tooling. The engineer is expected to lead work from design through production, make sound technical decisions with minimal guidance, improve engineering practices, and mentor less experienced engineers. Success in this role requires balancing software engineering fundamentals with operational excellence while collaborating across engineering, QA, product management, architecture, security, and release teams. The ideal candidate is passionate about automation, operational reliability, and continuous improvement, communicates effectively with both technical and non-technical stakeholders, and leverages approved AI-assisted engineering tools responsibly to improve productivity, documentation, troubleshooting, and engineering quality.