Senior Site Reliability Engineer, Fleet Management

We are the Team Platform Engineering department within SRE, responsible for critical infrastructure and operational functions that support MongoDB’s broader engineering organization. Our scope includes multi-cloud-provider Kubernetes infrastructure, networking, load balancing (public-facing edge and internal service mesh), and observability and alerting systems.

About the role

The Fleet Management team provides the core runtime environment that empowers our developers to build and ship products. We manage the end-to-end lifecycle of our Kubernetes fleet and the critical components that ensure cluster reliability and security (e.g., CoreDNS, cert-manager, and Gatekeeper). As our infrastructure scales, we are spearheading a migration from Terraform-based Infrastructure as Code (IaC) to an Operator-driven lifecycle management model.

This role can be based in one of our offices (Austin, Boston, Los Angeles, New York City, Raleigh, San Francisco, or Dublin) or remotely in the United States.

Responsibilities

• 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 our Kubernetes ecosystem, partnering with engineering teams to help them 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, ensuring you aren’t paged for the same issue twice

Requirements

• 6+ years of experience in software development and operating distributed systems
• Proficiency in Go, Python, or a similar language, with a strong commitment to code quality and testing practices (writing unit, integration, and E2E tests)
• Deep experience using and extending containerization technologies, preferably Kubernetes
• Solid understanding of Linux operating system internals and networking concepts (e.g., filesystems, TCP/IP, DNS, TLS)
• Customer-focused mindset, treating internal developers as your primary users
• Strong operational ownership, including a track record of debugging complex production issues and driving them to resolution
• Preference for automation over manual processes (“allergic to ops work”)

Nice-to-have skills

• Designing and implementing secure, multi-tenant runtime environments from first principles
• Proficiency with Kubernetes ecosystem tools such as Helm, Kustomize, Gatekeeper, Kyverno, CRDs/Operators, CRI, and CSI
• Expertise in cloud infrastructure platforms, including AWS, GCP, or Azure
• Proficiency in provisioning infrastructure using tools like Terraform, Crossplane, and AWS Controllers for Kubernetes (ACK)
• Advanced Linux systems internals and networking concepts specifically relevant to containers, such as namespaces and cgroups

About MongoDB

MongoDB is built for change, empowering our customers and our people to innovate at the speed of the market. We have redefined the data platform for the AI era, enabling builders to create, transform, and disrupt industries with software. Our unified data platform, the most widely available, globally distributed data platform on the market, helps organizations modernize legacy workloads, embrace innovation, and unleash AI. MongoDB Atlas, our cloud-native platform, is the only globally distributed, multi-cloud data platform available across AWS, Google Cloud, and Microsoft Azure.

With offices worldwide and over 67,000 customers—including 75% of the Fortune 100 and AI-native startups—we’re powering the next era of software. Our compass is our Leadership Commitment, guiding how and why we make decisions, show up for each other, and win. To drive personal growth and business impact, we’re committed to developing a supportive and enriching culture for everyone. From employee affinity groups to fertility assistance and a generous parental leave policy, we value our employees’ wellbeing and want to support them along every step of their professional and personal journeys.

Pay

MongoDB’s base salary range for this role in the U.S. is $127,000—$249,000 USD.

Benefits

• Equity
• Participation in the 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
• Access to transgender-inclusive health insurance coverage
• Health benefits offerings