Site Reliability Engineer (Senior or Staff), Infrastructure Security

ABOUT THE ROLE MongoDB’s Site Reliability Engineering team is the guardian of our cloud‑native infrastructure, ensuring that the Atlas platform remains secure, resilient, and compliant at scale. As a Senior or Staff Site Reliability Engineer – Infrastructure Security, you will lead the design, deployment, and continuous improvement of security controls across AWS, Azure, and GCP. You will be a hands‑on technical leader who mentors a small group of SREs, drives cross‑team collaboration, and shapes the security posture of the entire data platform. Your work will directly protect the data of over 67,000 customers, including a majority of the Fortune 100, and enable them to innovate safely in the AI era. WHAT YOU'LL DO You will architect and implement cloud security solutions, integrating IAM, VPC, security groups, and native CSPM services such as GuardDuty, Security Hub, and CloudTrail. You will build automated pipelines for real‑time monitoring, logging, and alerting, leveraging Terraform, CloudFormation, and Ansible to codify security policies. You will evaluate and deploy third‑party tools for endpoint protection and runtime scanning, ensuring they fit seamlessly into our multi‑cloud environment. You will collaborate with product, platform, and compliance teams to translate regulatory requirements into enforceable controls. You will coach junior SREs, conduct code reviews, and drive a culture of continuous learning and operational excellence. Finally, you will own incident response processes, leading post‑mortem analyses to strengthen our defenses. WHAT YOU'LL NEED You have 6+ years of SRE or infrastructure engineering experience with a strong focus on security, and at least 2 years in a senior or staff role. You possess deep knowledge of cloud security fundamentals, from OS networking to provider‑specific configurations, and have led projects in runtime scanning, CSPM, and security observability. You are proficient in at least one programming language, preferably Golang, and have hands‑on experience with IaC tools such as Terraform, CloudFormation, or Ansible. You understand Linux internals, networking protocols, and how they interact in complex distributed systems. You can articulate complex security concepts to technical and non‑technical stakeholders, and you have a proven track record of mentoring small teams while delivering high‑impact results. You thrive in an async, distributed environment and are comfortable working across time zones. WHY REMOTE MongoDB embraces a fully distributed, asynchronous culture that empowers engineers to work from any location that aligns with their personal and professional rhythms. Our remote model offers flexible schedules, allowing you to balance deep technical work with collaboration across global teams. We provide the tools and processes that enable seamless communication, knowledge sharing, and real‑time collaboration, ensuring that distance never hinders impact. Whether you choose a hybrid office presence in New York, Austin, Seattle, or San Francisco, or a fully remote setup in Eastern or Central time zones, you will be part of a high‑performing, mission‑driven community that values autonomy, continuous improvement, and a shared commitment to security excellence. BENEFITS MongoDB offers a comprehensive benefits package that includes competitive health, dental, and vision coverage; a generous paid time off policy; a remote work stipend; a learning and development budget; and a flexible parental leave program. We also provide access to wellness resources, employee assistance programs, and a robust equity plan. Our culture supports professional growth through mentorship, technical training, and opportunities to lead cross‑functional initiatives. Join MongoDB and help shape the security foundation of the world’s most widely used data platform.