Mozilla Senior Full Stack Web Developer

Posted on July 23rd, 2019

Why join Mozilla engineering?

Learn: Code review at Mozilla includes pushing to passionate contributors around the world. Building Firefox and its family of products requires knowledge up and down the stack, and extremely high standards for security and optimization. Beyond the browser, we’re developing AR/VR, IoT, and voice recognition products that respect and protect privacy.

Grow: We’re dedicated to helping every team member develop. We give engineers trust and responsibility from day one, offer generous stipends for learning opportunities, and provide mentorship, especially around key leadership skills like collaboration and clear, kind communication.

Make Your Mark: We’re small but mighty, challenging the biggest behemoths on the internet with a staff the size of their marketing departments. That means every engineer can have an outsized impact on products that touch tens of millions of users—ultimately influencing how the entire internet works.

The Role

Mozilla is looking for a Senior Full Stack Web Developer for MDN to help us with maintaining and evolving the open-source platform behind the web standard documentation developers love. On MDN, we strive to provide developers with the information they need to easily build on the open web using standards, and we have a real passion for helping our fellow developers.

As a senior developer on this team, you will work closely with team members from a variety of disciplines such as writers, UX, product management, and marketing (design) to build and evolve MDN and other parts of Mozilla's tech stack. We also hope you will coach and mentor team members and volunteers who contribute to the MDN platform (and learn from them too).

Key Qualifications

  • Highly experienced in front-end and backend web development in a professional capacity, preferably on a high-volume site or web application.
  • Extensive front-end development using JavaScript, jQuery, front-end JS Frameworks (React), HTML, and CSS.
  • Experience coding with Python/Django
  • Designing, building, and using web-based REST APIs
  • Experience developing within the Node.js ecosystem
  • Experience with relational databases (MySQL, PostgreSQL)
  • Comfortable working with Git & GitHub
  • Good knowledge of the continuous deployment and integration process.
  • Experience with large scale software projects - source code control, continuous integration, documentation. It would be extremely helpful to know fundamentals of Docker, Jenkins, multi-branch pipelines, AWS (Route53, S3, CloudFront, RDS, IAM, etc.), Kubernetes.
  • Prior experience with Scrum/Agile/Kanban or similar development methodology.
  • Experience working with UI/UX designers
  • Ability to work productively on a remote, geographically distributed team
  • Share knowledge with team and mentor junior members of the team.

The Team You’ll Join

You’ll be part of our developer relations team, alongside folks who create content, work on events, and do outreach directly with tech audiences around the world. Our team is mostly remote and meeting hours tend to span the Central European to the Pacific time zones (early evening in Europe/UK, morning on the West Coast of the US).


Feel good about your work again.

At Mozilla, we’re serving humanity—by maintaining a safe, open internet—while also helping the individual humans employed here to reach their personal and professional goals. With a relatively small team serving hundreds of millions of people, a culture of exploration, and a commitment to mentorship, opportunities abound to learn and grow at Mozilla.

Our values drive our actions

  • Purpose is built into our work, with our mission driving every decision
  • We challenge assumptions, the status quo, ourselves, and each other
  • We are transparent: in our code, our business partnerships, and our everyday interactions 
  • We seek out people from diverse backgrounds and with perspectives different from our own 
  • We pair purpose with performance and put people ahead of profit


Our impact is global

  • 1000+ paid staff from over 30 countries
  • Thousands of volunteer contributors across six continents
  • 10 global offices: Beijing, Berlin, London, Paris, Mountain View, Portland, San Francisco, Taipei, Toronto and Vancouver
  • Hundreds of home offices globally

Our benefits are world-class 

  • Flexible work environment (nearly half of Mozillians work remotely)
  • Industry-leading paid parental leave (up to 26 weeks of fully paid leave for childbearing parents and up to 12 weeks for non-childbearing parents)
  • Reimbursement for professional development (up to $3,000/year)
  • A work setup including the latest hardware and software of your choice
  • Wellness programs—we reimburses up to $1700/year for expenses like child and elder care, mental wellness, and personal enrichment 


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.

We are an equal opportunity employer and value diversity. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.

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. Mozilla’s Emerging Technologies group incubated and sponsors Rust — Stack Overflow’s “most loved programming language” for the last four years — and is building safe, private versions of virtual reality, internet of things, and voice recognition.



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