Software Developer (UK)

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.

We are seeking a Senior Software Engineer to join our Managed Services and Emerging Technology Group. The successful candidate will bring strong hands-on experience in Go, ideally alongside experience in TypeScript, to design, build, ship, and support reliable software within a collaborative engineering team. This role is suited to an engineer who can lead complex feature and service delivery end to end, contribute to technical direction and engineering standards, mentor less experienced engineers, and make effective use of modern developer tooling, including AI-assisted tools, while continuing to strengthen our frontend and backend platforms.

Design, develop, test, deploy, and maintain complex software features and services, primarily in Go, with opportunities to contribute to TypeScript-based systems where needed.

Take ownership of the full lifecycle of your work, including technical design, implementation, testing, production support, defect resolution, and iterative improvement.

Lead the delivery of well-defined projects or complex features, breaking work into clear tasks, managing technical risks, and driving execution to agreed timelines and quality standards.

Contribute to design and architecture discussions, helping improve system structure, maintainability, scalability, and operational resilience.

Participate in and lead peer reviews of code, designs, documentation, and test cases, while using modern developer tooling, including AI-assisted tools where appropriate, to improve development efficiency, code quality, and team outcomes.

Support the systems your team owns, including contributing to production support, incident response, and on-call activity where needed, while improving the team development experience and delivery practices through better tooling, test coverage, code structure, observability, continuous improvement, and support for junior engineers through mentoring and knowledge sharing.

Commercial experience in software engineering, ideally around 5-8 years, with strong practical experience in Go. Experience with TypeScript would be advantageous

Strong experience building and maintaining backend services, preferably in Go, and familiarity with TypeScript and a modern frontend framework such as Angular or React.

Ability to own and deliver well-defined feature work, consistently meeting agreed timelines and quality standards.

Experience writing maintainable, well-tested code, participating in design and code reviews, and contributing to process and quality improvements within the team.

Good understanding of software design, debugging, testing, and operational support in production environments.

Strong problem-solving skills, sound engineering judgement, and the ability to identify risks, resolve ambiguity, and work effectively with other teams when needed.

Experience mentoring or supporting less experienced engineers, contributing positively to team collaboration, and using modern developer tooling, including AI-assisted coding tools such as GitHub Copilot or Cursor, to improve development efficiency and code quality would be advantageous

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.

· 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

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.

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