Mozilla Corporation is the non-profit-backed technology company that has shaped the internet for the better over the last 25 years. We make pioneering brands like Firefox, the privacy-minded web browser. Now, with more than 225 million people around the world using our products each month, we’re shaping the next 25 years of technology and helping to reclaim an internet built for people, not companies. Our work focuses on diverse areas including AI, social media, security, and more.

The Mozilla

Corporation is wholly owned by the non-profit 501(c) Mozilla Foundation. Along with thousands of volunteer contributors and collaborators worldwide, Mozillians design, build, and distribute open-source software that enables people to enjoy the internet on their terms. 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.

Domain

Architecture & Technical Direction Contribute to medium- and long-term technical strategy (typically 6-18 months) Lead delivery of ambiguous, high-impact infrastructure projects Drive migrations, re-architectures, and performance/reliability improvements Remain hands-on with critical systems and implementations Influence technical decisions through design reviews and collaboration Ensure systems integrate cleanly across infrastructures (office, DC, cloud) 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 Infrastructure & Networking Depth Design and support core infrastructure components (compute, DNS, networking,



identity, etc.) Drive improvements in performance, scalability, and dependability DNS, network architecture, cloud infra) Mentorship & Technical Guidance Mentor engineers and guide system design and troubleshooting Raise the technical quality of the team through reviews and shared practices 6+ years of experience in systems engineering or infrastructure roles ~ Strong experience designing and operating production infrastructure ~ Solid expertise in: ~ 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 Python Multi-Team Impact: Demonstrate influence and contributions that extend beyond your immediate team.

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. Hands-On Leadership: actively contributes to implementation, not just design Bonus Skills/Competencies Policy Enforcement 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)



Country-specific holidays plus a day off for your birthday One-time home office stipend Considerable paid parental leave Employee referral bonus program Other perks (life/AD&D;, disability, EAP, etc.

- 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. 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. 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. 128,000—$171,000 CAD 116,000—$155,000 CAD #

📌 Engineer Senior - Operations Engineering (Toronto)
🏢 Mozilla
📍 Toronto