Senior Software Engineer

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

Role Summary

Performance Engineer, drives the optimization of the Sophos Central webservices and websites, as well as design, implementation, and maintainance of performance monitoring tools to enable other engineers to discover and mitigate performance issues in their code.

The role is for Central Performance engineering team. We manage, design and implement performance frameworks, provide guidance in writing and running good performance tests to product teams.

• Design, implement, and maintain performance monitoring tools
• Work with development teams to design performance test strategies
• Execute component and system level performance tests
• Participate as part of a team in design and implementation, leveraging modern design patterns to achieve better performance, scalability, and overall stability of applications
• Analyze metrics and code to uncover performance regressions and opportunities for optimization, and work with teams across the organization to speed things up.
• Ability to work effectively with UX, PM, DevOps, QE and other developers to advocate for performance improvements
• Proven ability to find, troubleshoot, and fix performance issues that span multiple systems.
• Technically curious to stay up to date with advances in technology
• Experience with best of breed Cloud technologies (NoSQL, high throughput event processing, cloud-scale data analytics, etc)

• 6-8 yrs of experience in Java, Groovy or Scala
• Experience integrating performance tools into CI/CD pipelines (GitHub Actions, Jenkins, bamboo, etc.)
• Experience using performance tooling (Gatling, JMeter, SOASTA, Load Runner)
• Experience with real-user/synthetic performance monitoring (Catchpoint, Navigation / Resource Timing API, webpagetest, SiteSpeed)
• Experience in Cloud computing(AWS)
• Experience/Knowledge with Agile Software Development methodologies
• Excellent attention to detail
• Excellent verbal and written communication skills
• Ability to design and write high quality code
• Understand how products and technologies interface with each other and fit with the strategy and business needs
• Evaluation of technical and functional specifications and their cohesion
• Work well on a team

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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. Please refer to the location details in our job postings for further information.

· 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