Senior Site Reliability Engineer, Fleet Management

MongoDB's Platform Engineering department within SRE is responsible for critical infrastructure and operational functions supporting the broader engineering organization, including multi-cloud Kubernetes infrastructure, networking, load balancing, and observability. The Fleet Management team provides the core runtime environment for developers, managing the end-to-end lifecycle of the Kubernetes fleet and critical components ensuring cluster reliability and security (e.g., CoreDNS, cert-manager, Gatekeeper). The team is spearheading a migration from Terraform-based Infrastructure as Code to an Operator-driven lifecycle management model.

• Contribute to developing and maintaining a scalable and secure runtime environment on top of Kubernetes that supports product needs across MongoDB.
• Provide internal support for the Kubernetes ecosystem, partnering with engineering teams to solve domain-specific problems.
• Participate in a 24/7 on-call rotation to resolve critical issues.
• Prioritize blameless post-mortems and dedicate engineering time to systemic fixes.

• 6+ years of experience in software development and operating distributed systems.
• Proficient in Go, Python, or similar language, with strong commitment to code quality and testing (unit, integration, E2E).
• Deep experience using and extending containerization technologies, preferably Kubernetes.
• Solid understanding of Linux internals and networking concepts (filesystems, TCP/IP, DNS, TLS).
• Customer-focused mindset, treating internal developers as primary users.
• Strong operational ownership, debugging complex production issues.
• Prefer automation over manual processes.

• Experience designing secure, multi-tenant runtime environments from first principles.
• Proficiency with Kubernetes ecosystem tools: Helm, Kustomize, Gatekeeper, Kyverno, CRDs/Operators, CRI, CSI.
• Expertise in cloud platforms: AWS, GCP, or Azure.
• Proficiency with Terraform, Crossplane, AWS Controllers for Kubernetes (ACK).
• Advanced Linux internals and networking concepts for containers (namespaces, cgroups).

Must be a US Citizen.

Base salary range for this role in the U.S. is $127,000—$249,000 USD. Other benefits for eligible U.S.-based employees may include: equity, employee stock purchase program, flexible paid time off, 20 weeks fully-paid gender-neutral parental leave, fertility and adoption assistance, 401(k) plan, mental health counseling, transgender-inclusive health insurance coverage, and health benefits offerings.

Apply via the provided link.