Senior Quality Engineer

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.

As a Senior Quality Engineer, you will lead and drive quality across our security product portfolio, including ZTNA, Enterprise Browser, Firewall, and DNS solutions. This role owns end‑to‑end quality while partnering closely with engineering, product, and platform teams, and plays a critical role in validating performance, longevity, and real‑world customer impact across highly complex, distributed systems.

• Develop comprehensive test plans and test strategies; design and execute test cases based on high‑level requirements and use cases
• Design, build, and maintain automation frameworks for API, backend, and system‑level testing
• Contribute to and help drive the QE strategy with a focus on scalability, performance, and long‑running system validation
• Identify, document, and track defects, driving them to closure in partnership with engineering teams
• Actively participate in design and architecture discussions, providing testability and quality feedback early
• Embed quality early through shift‑left testing practices, design reviews, and use of modern testing tools
• Validate system behaviour across large tenant volumes, high throughput, and long‑running scenarios
• Represent the engineering team in customer discussions or onsite engagements, as required
• Serve as a quality advocate, evangelizing the importance of product quality across teams
• Act as a quality activity initiator and driver within feature teams
• Partner closely with developers to improve test coverage, observability, and defect prevention
• Quickly learn and understand complex systems and diagnose technical issues effectively
• Demonstrate strong troubleshooting, problem‑solving, and analytical skills
• Prioritize work effectively, maintain focus, and drive tasks through to completion in a fast‑paced environment

• 8–10 years of total work experience with strong hands‑on expertise in the SASE domain
• Solid understanding of cloud‑native architectures across AWS, Azure, and GCP
• Proven experience designing and driving automation‑first testing strategies and QE architecture
• Exposure to or hands‑on experience with AI‑assisted test automation tools is preferred
• Strong foundation in operating systems and network security concepts
• Prior hands‑on experience with networking technologies and protocols, including HTTP, TCP/IP, UDP, DHCP, DNS, proxy servers, and load balancers
• Hands‑on experience with performance and scalability testing tools such as JMeter, Gatling, Locust, or equivalent
• Understanding of multi‑platform environments, including UNIX/Linux, macOS, and Windows
• Familiarity with observability practices and tools, including logs, metrics, and distributed tracing
• Experience validating identity‑centric workflows, including integrations with Microsoft Entra ID (Azure AD)