Software Engineer (SRE), Oxford

Software Engineer (SRE)

New Today

About Sophos

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 with innovative, native AI-optimized services, technologies and products. Sophos is the largest pure-play Managed Detection and Response (MDR) provider, supporting more than 28,000 organizations. The complete portfolio includes endpoint, network, email, and cloud security that interoperate via the Sophos Central platform. Secureworks provides Taegis XDR/MDR, ITDR, next-gen SIEM capabilities, managed risk, and advisory services. Sophos sells these solutions through reseller partners, MSPs and MSSPs worldwide, defending more than 600,000 organizations from phishing, ransomware and cybercrime. Information is powered by Sophos X-Ops threat intel and the Counter Threat Unit (CTU). Sophos is headquartered in Oxford, U.K. More information is available at www.sophos.com. Role Summary

We are looking for a Site Reliability Engineer with 3-5 years of experience to join our team at Sophos, a leading cybersecurity company. The ideal candidate will be responsible for building, maintaining, and improving highly available, secure, and scalable cloud infrastructure and CI/CD pipelines while ensuring operational excellence, cost efficiency, and production reliability. This role will be part of the Site Reliability Engineering (SRE) team that manages production environments on AWS with EKS and ECS-based microservices. They are responsible for deployment automation and application deployments via CI/CD pipelines using Jenkins and GitHub Actions. The team uses Infrastructure as Code (IaC) with Terraform to build secure, reliable, and scalable systems while enabling observability across the platform. They collaborate with application, engineering and security teams to ensure smooth delivery and adherence to best practices. They focus on incident management, proactive issue handling, and maintaining optimized system performance through analytics and automation. What you will do

Design, implement, and maintain infrastructure as code (IaC) using Terraform. Build, maintain, and enhance CI/CD pipelines using Jenkins and GitHub Actions for secure and automated deployments. Implement and manage cloud infrastructure on AWS, ensuring high availability, scalability, cost optimization, and security compliance. Design, deploy, and manage containerized applications using Docker and Kubernetes (EKS). Handle microservices-based infrastructure, ensuring reliability, scalability, and smooth orchestration. Responsible for production deployments, ensuring smooth and secure releases with minimal downtime. Conduct Root Cause Analysis (RCA) for production incidents and implement preventive measures. Set up and manage monitoring, alerting, and observability using Grafana, Prometheus, CloudWatch, or similar, with a focus on security and reliability metrics. Collaborate across multiple teams including development, security, and product teams to ensure smooth operations and delivery. Work on incident response, vulnerability remediation, and ensure systems meet SLA/SLO targets. Ensure compliance with security policies, standards, and best practices in deployments and infrastructure management. Work on an on-call basis to support production systems and ensure continuous service availability. What you will bring

3-5 years of experience in an SRE environment. Strong experience with Terraform, AWS, and security-first cloud architecture. Hands-on experience with CI/CD pipelines using Jenkins and GitHub Actions. Expertise in Kubernetes and container orchestration. Experience handling microservices-based infrastructure. Strong understanding of monitoring, observability, and alerting: Grafana, Prometheus, CloudWatch, or similar. Experience with incident management, RCA, and troubleshooting production issues. Responsible for production deployments with high reliability and security. Knowledge of Linux/Unix systems, networking, and security principles. Strong scripting and programming skills in Bash, Python, or similar for automation and operational tasks. Experience with cloud cost optimization and resource management. Ability to collaborate effectively across cross-functional teams. Strong troubleshooting skills and problem-solving ability in a fast-paced product environment. Familiarity with SRE principles in a security-focused product environment. Bachelor’s degree in computer science, Information Technology, or related field. Desirable

Hands-on experience with AWS, CI/CD, Jenkins, Git, Terraform, Kubernetes, scripting & programming skills. Proven troubleshooting skills and deep operational expertise. Experience working in high-availability, production-critical environments. Strong understanding of security and compliance considerations in cloud-native environments. Ready to Join Us?

At Sophos, we believe in the power of diverse perspectives to fuel innovation. We encourage you to apply even if you do not meet every bullet; your unique experiences and skills might be exactly what we need. What’s Great About Sophos?

· Sophos operates a remote-first working model; some roles may require a hybrid approach. Applicants must have legal authorization to work in the posting jurisdiction without requiring employer sponsorship. · Our people—innovation, teamwork, and a sense of fun. · Employee-led diversity and inclusion networks, community building and advocacy. · Annual charity and fundraising initiatives and volunteer days for employees. · Global sustainability initiatives to reduce environmental footprint. · Global fitness and trivia competitions and wellbeing days for employees. · Monthly wellbeing webinars and training to support employee health and wellbeing. Our Commitment To You

We are committed to equality of opportunity. All applicants will be treated fairly 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. If adjustments are needed in the recruitment process to support you, please let us know. Data Protection

If you share your CV or personal details with Sophos, these details will be held for 12 months in accordance with our Privacy Policy and used by our recruitment team to contact you regarding this or other opportunities. For information on data protection practices, consult our Privacy Policy.

#J-18808-Ljbffr

Apply

Location:: Oxford
Salary:: £150,000 - £200,000
Job Type:: FullTime
Category:: IT & Technology

Start a New Search