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Senior Fullstack Engineer


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

Are you passionate about Mozilla and the Internet? Do you want to ship software to a massive user base? Do you want your contributions to have a positive impact on the world? Do you want to build state of the art privacy & security features for everyone on the Internet?

Join us on the Privacy & Security Engineering team. We are a vanguard protecting people on the internet. We embody the Mozilla manifesto principle: individuals’ security & privacy are fundamental and must not be treated as optional.

We work with Product, UX, other engineering teams, as well as QA, Ops, and Legal teams across Mozilla. We build comprehensive full-stack software like Mozilla VPN, Firefox Monitor, Relay, and Containers. We code web services and APIs, web front-ends, browser extensions, and client-side apps.

What You’ll Get To Do

  • You will collaborate with people across Product, UX, Design, Engineering, QA, Localization, Ops, and Support teams to build and maintain comprehensive privacy & security products.
  • You will build and maintain code across the “full stack” of applications, so you will need to design proper client/server interactions and architecture.
  • You will build, maintain, use, and combine a number of APIs for end products.

What You Bring

Minimum Qualifications

  • You have 3+ years experience writing HTML, CSS, and JavaScript code.
  • You have 3+ years experience writing server-side code in python and/or node.js, including web service APIs
  • You speak English fluently and can conduct software engineering work in the open.

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 [email protected] to request an 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.

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