Senior Quality Engineer — Investigate & Respond

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

We are looking for a Senior Quality Engineer to champion quality across the Investigate & Respond product area. In this role, you will work autonomously across services, APIs, and user-facing workflows — helping teams catch issues early, build meaningful automated coverage, and deliver reliable customer experiences.

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What You Will Do

• Own and evolve the team's quality strategy across functional, integration, API, and end-to-end testing.
• Design, implement, and maintain automated test coverage using established frameworks and practices.
• Partner with engineers and product managers — from refinement through release — to identify risk, sharpen acceptance criteria, and build quality into every stage of delivery.
• Test complex workflows spanning distributed services, asynchronous processing, APIs, and web applications.
• Investigate production issues and customer-reported defects; translate findings into regression coverage and process improvements.
• Raise quality risks early and advocate for pragmatic solutions that protect the customer experience.
• Improve test reliability, execution speed, observability, and developer feedback loops.

What You Will Bring

• 5+ years of experience in software quality engineering, SDET, or a closely related role.
• Hands-on experience designing and maintaining automated tests across API, service, and UI layers.
• Experience with Python and pytest for test automation.
• Experience with modern testing frameworks and automation practices.
• Strong API testing experience.
• The ability to build test strategies for ambiguous, cross-service, or high-risk changes.
• A self-directed working style — you take initiative, drive investigations to completion, and know when to pull others in.
• Clear, direct communication and comfort influencing decisions across engineering and product teams.
• Familiarity with CI/CD pipelines, test reporting, and test environment management.

Nice to Have

• GraphQL experience.
• Familiarity with Go testing ecosystems.
• Hands-on experience with Playwright.
• Experience writing or reviewing Go code.
• Experience in cybersecurity, SaaS, or complex enterprise products.

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In the United States, the base salary for this role ranges from $126,000 to $210,000. In addition to base salary, we offer additional  compensation including bonus eligibility and a comprehensive benefits package.  A candidate’s specific pay within this range will depend on a variety of factors, including job-related skills, training, location, experience, relevant education, certifications, and other business and organizational needs. 

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Ready to Join Us?

At Sophos, we believe in the power of diverse perspectives to fuel innovation. Research shows that candidates sometimes hesitate to apply if they don't check every box in a job description. We challenge that notion. Your unique experiences and skills might be exactly what we need to enhance our team. Don't let a checklist hold you back – we encourage you to apply.

What's Great About Sophos?

·   Sophos operates a remote-first working model, making remote work the primary option for most employees. However, some roles may necessitate a hybrid approach. While we are a remote first organization, applicants must have legal authorization to work in the jurisdiction where the position is posted, without requiring employer sponsorship.

·   Our people – we innovate and create, all of which are accompanied by a great sense of fun and team spirit

·   Employee-led diversity and inclusion networks that build community and provide education and advocacy

·   Annual charity and fundraising initiatives and volunteer days for employees to support local communities

·   Global employee sustainability initiatives to reduce our environmental footprint

·   Global fitness and trivia competitions to keep our bodies and minds sharp

·   Global wellbeing days for employees to relax and recharge 

·   Monthly wellbeing webinars and training to support employee health and wellbeing

Our Commitment To You

We’re proud of the diverse and inclusive environment we have at Sophos, and we’re committed to ensuring equality of opportunity.   We believe that diversity, combined with excellence, builds a better Sophos, so we encourage applicants who can contribute to the diversity of our team.  All applicants will be treated in a fair and equal manner and in accordance with the law regardless of gender, sex, gender reassignment, marital status, race, religion or belief, color, age, military veteran status, disability, pregnancy, maternity or sexual orientation.  We want to give you every opportunity to show us your best self, so if there are any adjustments we could make to the recruitment and selection process to support you, please let us know. 

Data Protection

If you choose to explore an opportunity, and subsequently share your CV or other personal details with Sophos, these details will be held by Sophos for 12 months in accordance with our Privacy Policy and used by our recruitment team to contact you regarding this or other relevant opportunities at Sophos.  If you would like Sophos to delete or update your details at any time, please follow the steps set out in the Privacy Policy describing your individual rights.  For more information on Sophos’ data protection practices, please consult our Privacy Policy Cybersecurity as a Service Delivered | Sophos