Senior Software Engineer – Quality Engineering & Testing

About Us

Sophos is a global leader and innovator of advanced security solutions for defeating cyberattacks. The company acquired Secureworks in February 2025, bringing together two pioneers that have redefined the cybersecurity industry with their innovative, native AI-optimized services, technologies and products. Sophos is now the largest pure-play Managed Detection and Response (MDR) provider, supporting more than 28,000 organizations. In addition to MDR and other services, Sophos’ complete portfolio includes industry-leading endpoint, network, email, and cloud security that interoperate and adapt to defend through the Sophos Central platform. Secureworks provides the innovative, market-leading Taegis XDR/MDR, identity threat detection and response (ITDR), next-gen SIEM capabilities, managed risk, and a comprehensive set of advisory services. Sophos sells all these solutions through reseller partners, Managed Service Providers (MSPs) and Managed Security Service Providers (MSSPs) worldwide, defending more than 600,000 organizations worldwide from phishing, ransomware, data theft, other every day and state-sponsored cybercrimes. The solutions are powered by historical and real-time threat intelligence from Sophos X-Ops and the newly added Counter Threat Unit (CTU). Sophos is headquartered in Oxford, U.K. More information is available at www.sophos.com.

About The Role

We’re looking for a Senior Software Engineer who cares deeply about building high-quality products - not just testing them after the fact. In this role, you’ll help shape how quality is engineered into our products from day one, working across software development, automation, and modern testing practices.

This role includes a blend of hands-on testing and automation. You’ll design systems, build tooling, and dive into manual testing where it adds the most value - all while helping the team deliver reliable software at scale.

We’re exploring how AI can meaningfully improve quality engineering beyond code assistants, and you’ll have the opportunity to shape that journey in a practical, grounded way. This is an area we’re actively evolving, not a fully mature capability today.

If you enjoy solving real engineering problems, improving how teams build software, and taking a pragmatic approach to quality, this role will give you the space to do it.

What You Will Do

Engineering Quality into the Product

• Partner with engineers, product managers, and designers to build quality into features from the start - not bolt it on at the end.
• Contribute directly to product code where it improves reliability, testability, and observability.
• Help shape system design decisions to reduce defects before they happen.

Building Scalable Test & Automation Systems

• Design and implement robust, maintainable automation across API, integration, and UI layers.
• Evolve our testing approach using modern engineering practices - focusing on fast feedback, meaningful and reliable results, and developer productivity.
• Improve CI/CD pipelines so quality checks are fast, reliable, and genuinely useful (not just gates).

Exploring AI-Driven Engineering

• Experiment with AI to improve how we test and validate software - from intelligent test generation, smarter failure analysis and self-healing approaches.
• Build or integrate tools that reduce manual effort and increase confidence in releases.

Raising the Bar for Engineering

• Help establish a strong, pragmatic quality culture that developers actually value.
• Ensure quality is a shared responsibility across the team, not owned by a single individual.
• Share ideas, mentor others, and contribute to how we continuously improve as a team.
• Influence engineering practices beyond your immediate team.

What You Bring

• Strong software engineering experience (JavaScript, TypeScript, or similar).
• A track record of building or improving automated testing in real-world systems.
• Experience working in modern development environments with CI/CD and cloud platforms.
• A practical mindset: you care about outcomes, not just frameworks or theory.
• Hands-on experience applying AI within quality engineering or testing contexts - for example, test generation, failure analysis, test optimisation, or similar.
• Ability to go beyond basic coding assistants and use AI to solve real testing or quality problems in innovative ways.

Nice to Have

• Experience working on security or high-reliability systems.
• Exposure to performance or security testing.
• Contributions to engineering communities, blogs, or open source.

What Success Looks Like

• Engineers move faster with more confidence because quality is built into their workflow.
• Testing provides fast, meaningful feedback - not noise.
• AI-driven approaches reduce manual effort and uncover issues earlier.
• The team sees quality as an enabler, not a bottleneck.

Why This Role Is Different

• You’ll be treated as a software engineer first, not a gatekeeper.
• You’ll have room to experiment with new ideas, including AI, and turn them into real impact.
• You’ll influence how software is built - not just how it’s tested.

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

We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.