Staff Operations Engineer

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

What you’ll bring:

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

Mozilla exists to build the Internet as a public resource accessible to all because we believe that open and free is better than closed and controlled. When you work at Mozilla, you give yourself a chance to make a difference in the lives of Web users everywhere. And you give us a chance to make a difference in your life every single day. Join us to work on the Web as the platform and help create more opportunity and innovation for everyone online.

Commitment to diversity, equity, inclusion, and belonging

Mozilla understands that valuing diverse creative practices and forms of knowledge are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but certainly not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientations, gender identities, and expressions.

We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at [email protected] to request accommodation.

We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. Mozilla will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose.

Group: C

#LI-REMOTE

Req ID: R3138

Hiring Ranges:

Remote Germany€81.000—€108.000 EUR