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
Preferred Skills
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
Key Competencies
Multi-Team Impact: Demonstrate influence and contributions that extend beyond your immediate team. Consistently participate in initiatives that affect infrastructure within your broader domain, and provide support or guidance across multiple teams when necessary.
Technical Ownership (Scoped): Take responsibility for systems or architecture within a clearly defined area of the infrastructure. Oversee the health, evolution, and quality of these systems, ensuring alignment with organizational standards.
Execution Amid Ambiguity: delivers on loosely defined problems with high impact
Influence Without Authority: drives alignment through credibility and alliance
Balance of Depth + Breadth: deep in one area, competent across adjacent systems
Hands-On Leadership: actively contributes to implementation, not just design
Bonus Skills/Competencies
GitHub Enterprise Administration
User Access Management
GH Org / Repo Management
SSO / SCIM Integration
Policy Enforcement
What you’ll get
Generous performance-based bonus plans for all eligible employees – we share in our success as one team
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)
About Mozilla
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 hiringaccommodation@mozilla.com 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
