Senior Staff Privacy Engineer, Firefox

Core Product-Firefox

We are Mozilla.

At Mozilla, our mission is to ensure the internet remains open and accessible to all. We are a mission-based, technology company.

Mozilla is a great place to work because of our mission, the quality and complexity of the work, and most importantly, the people who do the work. Come to Mozilla if you want to feel good about your work again.

Why Join?

Mozilla is a great place to work because of our mission, the quality and complexity of the work, and most importantly, the people who do the work. Come to Mozilla if you want to feel good about your work again.

About this role

The Company

A lot of companies say they’re “mission-driven”. Our unique corporate structure guarantees that every decision we make upholds our mission: to make sure the internet stays available, safe, and welcoming to everyone. Beholden to neither shareholders nor investors, Mozilla Corporation is wholly owned by the not-for-profit Mozilla Foundation.

Along with 20,000+ volunteer contributors and collaborators all over the world, Mozilla Corporation’s staff designs, builds, and distributes software that allows people to enjoy the internet on their own terms. Our flagship product — the Firefox browser — has expanded into a family of products that protects users and alerts them of risks.

The Opportunity

  • Opportunity to impact and influence privacy features in Firefox.
  • Develop cutting-edge privacy features with world-class engineering and cross-functional teams to protect the privacy of millions of Firefox users.
  • Develop a good understanding of the technologies used to track users online like browser fingerprinting, cookie synchronization, and persistent tracking techniques.
  • Help analyze and develop privacy-preserving technologies for core web functions such as authentication, monetization, and identity.
  • Provide recommendations and represent Mozilla in web standards bodies.

What You'll Get To Do

  • Lead the team to build reliable, efficient, and well-tested solutions to complex problems that directly impact users’ security, privacy, and convenience.
  • Work closely with the Privacy team to productize, integrate, and maintain privacy features in Firefox.
  • Shape the future of the web by editing and reviewing web standards for privacy-preserving APIs.

What You Bring

Minimum Qualifications

  • 2+ years in a previous leadership role in software development or privacy.
  • Understanding of the core web technologies like the same origin policy and storage access policies.
  • Understanding of the Web architecture, APIs, and design approaches.
  • Effectively collaborate and lead across a diverse and cross-functional team, including interaction with external partners.
  • Have excellent written and verbal communication skills.
  • Passion for user privacy.
  • Ability to quickly analyze and solve sophisticated software development problems spanning multiple components, sometimes outside your area of expertise.
  • Be comfortable navigating large and complex codebases.
  • Programming experience in at least one major programming language such as C++, Python or JavaScript.

Bonus points for

  • Experience auditing the privacy practices of websites or products.
  • Experience working on web client technology such as browsers or browser extensions.
  • Participation in an internet standards body such as the W3C or IETF.

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 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