[Hiring] Staff Operations Engineer @Mozilla

Role Description

A Staff Operations Engineer leads the design, reliability, and evolution of hybrid-cloud and workplace infrastructure. This senior role spans teams, drives complex initiatives, sets technical direction, and ensures systems are scalable, secure, and efficient. This role combines technical execution with leadership, shaping architecture both directly and collaboratively.

What you’ll do:

• Domain Architecture & Technical Direction
  • Own and evolve architecture within a defined infrastructure domain
  • Design and implement scalable, reliable systems spanning multiple teams or environments
  • Establish and promote best practices, patterns, and standards within the domain
  • Contribute to medium- and long-term technical strategy (typically 6-18 months)
• Complex Problem Solving & Execution
  • Lead delivery of ambiguous, high-impact infrastructure projects
  • Break down elaborate system problems into implementable solutions
  • Drive migrations, re-architectures, and performance/reliability improvements
  • Remain hands-on with critical systems and implementations
• Cross-Team Collaboration
  • Work across teams (IT, SRE, Security, Service Owners) to unify solutions
  • Influence technical decisions through design reviews and collaboration
  • Ensure systems integrate cleanly across infrastructures (office, DC, cloud)
• Reliability, Operations & Scaling
  • Improve system reliability through monitoring, alerting, and operational design
  • Contribute to defining SLIs/SLOs and capacity planning within the domain
  • Participate in and lead root cause analysis for complex incidents
  • Decrease operational toil through automation and system improvements
• Infrastructure & Networking Depth
  • Design and support core infrastructure components (compute, DNS, networking, identity, etc.)
  • Drive improvements in performance, scalability, and dependability
  • Contribute deep expertise in at least one area (e.g., DNS, network architecture, cloud infra)
• Automation & Tooling
  • Build and improve automation using scripting and Infrastructure as Code
  • Contribute to internal tooling and platform improvements
  • Promote repeatable, standardized approaches to system management
• Mentorship & Technical Guidance
  • Mentor engineers and guide system design and troubleshooting
  • Raise the technical quality of the team through reviews and shared practices
  • Act as a go-to resource within the domain
• Documentation & Operational Clarity
  • Maintain clear documentation, diagrams, and runbooks for systems owned
  • Ensure systems are understandable and operable by others
  • Contribute to knowledge sharing across teams

Qualifications

• 6+ years of experience in systems engineering or infrastructure roles
• Strong experience designing and operating production infrastructure
• Solid expertise in:
  • VMware
  • Cisco UCS
  • Application/Network Loadbalancers
  • Linux/Unix Operating Systems
  • Networking fundamentals (DNS, TCP/IP, routing, firewalls)
  • Data center environments
• Demonstrated ability to lead complex technical work across teams

Requirements

• Experience with Infrastructure as Code
• Puppet/Ansible/etc.
• Python
• Familiarity with observability tooling and reliability practices
• Experience with containerization and modern platform tooling
• Exposure to security best practices in infrastructure design

Benefits

• Generous performance-based bonus plans for all eligible employees - we share in our success as one team
• Rich medical, dental, and vision coverage
• Generous retirement contributions with 100% immediate vesting (regardless of whether you contribute)
• Quarterly all-company wellness days where everyone takes a pause together
• Country-specific holidays plus a day off for your birthday
• One-time home office stipend
• Annual professional development budget
• Quarterly well-being stipend
• Considerable paid parental leave
• Employee referral bonus program
• Other benefits (life/AD&D, disability, EAP, etc. - varies by country)