Senior Software Engineer (C/C++ and Networking)

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 Sophos Firewall is the flagship product of Sophos, operating in the network security domain to safeguard customer network traffic when deployed in router or switch mode. It processes traffic across all layers, from L2 to L7. As a mature yet continuously evolving product adapting to the changing cybersecurity landscape, it offers the opportunity to work on L2/L3/L4 protocol stacks, high availability, SD-WAN, kernel-space data paths, and highly scalable design challenges handling millions of network flows, among other areas. You’ll be a part of NSG engineering group. In this senior role, you will be part of an innovative engineering team, designing and developing features for the next generation firewall product. Your skills and experience will be put to good use in continually modernizing, scaling, upgrading, and innovating existing platforms that keep pace with the fast-moving industry. We have a highly collaborative work culture where you will work within and across different scrum teams to architect/design/develop/maintain features and solutions for the network security products that protect millions of end users.