Software Engineer 1 - UK

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
At Sophos, our mission is clear: defeat cyberattacks and protect organizations around the world. We are seeking a Junior Software Engineer to join our Security features team and help build the systems that make that mission possible.
In this role, you will work as part of a fast-paced, high-performing engineering team that designs, architects, and builds systems from the ground up. You'll work on real production code that protects customers at scale and gain hands-on experience throughout the software development lifecycle - from understanding requirements, to implementing, testing, and deploying out new features.
This position is for someone early in their career, who is excited to learn by doing. As a Junior Software Engineer, we will guide you through breaking down complex problems and translating their solutions into clean, production-ready code. As you grow, you'll develop strong systems-level thinking and gain confidence debugging issues, improving existing systems, and building new services from scratch.
Overall, we value curiosity, flexibility, and creative problem solving, and are committed to helping new hires build the foundations they need to grow into strong software engineers.

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

What you will do  :
• Write code, primarily in TypeScript, across frontend (e.g. Vue, React, Angular) and backend services.

• Design and implement APIs to query, aggregate, and serve data reliably at scale.

• Debug production issues and improve system performance, reliability, and code quality.

• Learn the fundamentals of building cloud infrastructure using Infrastructure as Code (e.g., Terraform).

• Participate in research, prototype and evaluate solutions, making thoughtful technical trade-offs.

• Contribute to code reviews and automated testing to enable safe, frequent releases.

• Use the latest AI coding tools to help you learn faster and accelerate delivery, while building the deep engineering foundations to become an expert in your own right. Collaborate with experienced engineers, Product Managers, UI designers, and Cyber Analysts to solve meaningful security problems. Contribute to sprint ceremonies, provide dependable estimates, and deliver on commitments with transparency.

What you will bring  :
Essential

• Strong foundations in computer science fundamentals (e.g., data structures, algorithms, software design, and debugging).

• Experience writing your own code through academic projects, internships, personal projects, or open-source contributions.

• Ability to break down ambiguous problems and reason through trade-offs.

• Clear written and verbal communication skills.

• Curiosity, continuous learning, and a willingness to take ownership.

• BSc in Computer Science or a related numerate discipline, or equivalent practical experience.

Desirable

• Experience with JavaScript or TypeScript (professional experience not required).

• Familiarity with frontend development (e.g., Vue, React, Angular).

• Familiarity with backend development and writing API endpoints.

• Understanding of relational and/or NoSQL databases.

• Exposure to automated testing (unit, integration, or end-to-end).

• Familiarity with REST APIs or GraphQL.

• Interest in cybersecurity and distributed systems.