Senior Software Engineer, Mozilla
€65-95k
Internet software for people, not profit
Be an early applicant
Internet software for people, not profit
1001+ employees
Be an early applicant
€65-95k
1001+ employees
Company mission
To ensure the internet remains open and accessible.
Role
Who you are
- 4+ years of professional experience building modern web applications
- Proficiency in React, JavaScript/TypeScript, HTML, and CSS, with strong debugging and testing skills
- Familiarity with Python/Django or similar backend frameworks
- Understanding of web security principles and practices
- Awareness of accessibility, responsive design, and API integration
- Strong collaboration and communication skills in a distributed team environment
- Comfortable working in an environment that includes contributions from both staff and the open-source community
- Commitment to our values:
- Welcoming differences
- Being relationship-minded
- Practicing responsible participation
- Having grit
- Exposure to cloud infrastructure (Google Cloud or similar)
- Other front end stacks such as Jinja2
Desirable
- Experience with relational databases such as MySQL
- Contributions to open source projects
- Experience mentoring or supporting junior developers
What the job involves
- Addons.mozilla.org (AMO) is the foundation of the Firefox add-ons ecosystem. It’s a showcase for developers to publish and grow their extensions, and a place of discovery for millions of users who customize Firefox to make it their own. AMO carries the responsibility of building a great, secure, and trustworthy experience for both users and developers
- As a Senior Software Engineer, you’ll bring a passion for crafting beautiful, accessible experiences to AMO. You’ll work closely with designers and product managers to turn ideas into polished features, modernize the platform and its architecture, and see your work reach millions of people around the world
- The Add-ons Engineering team builds and maintains AMO as a critical part of Firefox’s customizability. Our responsibilities include:
- Frontend and full stack development: React/TypeScript frontends, Django backend, MySQL datastore
- Platform reliability: deployments, monitoring, and incident response on Google Cloud
- Feature development: submission flows, trust and safety signals, and DevHub modernization
- Open collaboration: We work in the open, with contributions from Mozilla staff and community members
- Design, build, and refine frontend experiences in AMO and DevHub, ensuring they are fast, accessible, and user-friendly
- Contribute to modernization and improvements in architecture and maintainability
- Help keep the platform safe and trustworthy, with attention to security and user trust
- Step in to resolve issues impacting users and developers, from small bugs to larger incidents
- Collaborate with designers, product managers, QA, and community contributors to deliver end-to-end improvements
- Contribute in the open through pull requests, code reviews, and discussions
Our take
Mozilla develops a range of free and open-source software, with its most familiar product being Firefox. Operated with a mission-driven, not0for-profit ethos, Mozilla champions online privacy, open standards and user-choice.
Beyond Firefox, Mozilla has focused on privacy forward offerings such as Mozilla VPN, which allows users to browse securely without being tracked. The company has also streamlined its product portfolio to concentrate on initiatives that align closely with its core mission, ensuring resources are dedicated to improving user experiences while fostering safer, more open digital environments.
Alongside this, its impact extends into the developer and tech community, having played a pivotal role in the creation of Rust, a systems programming language celebrated for its speed and efficiency. With a loyal user base, ongoing innovation, and a clear commitment to privacy and open-source principles, Mozilla remains an influential player in the technology landscape.
Freddie
Company Specialist at Welcome to the Jungle
Insights
12% employee growth in 12 months
Company
Funding (last 2 of 3 rounds)
Apr 2018
$1.2m
GRANT
Jan 2005
$0.3m
ANGEL
Total funding: $3.5m
Company benefits
- Health and wellness: Mozilla covers medical, dental and vision plan premiums at 100% for U.S. and Canadian employees. Our offerings give you the options you need to manage your health — and your family’s — the way you want.
- Mental health: Mental health is as important as our physical health. That’s why Mozilla’s health benefits include therapy and coaching sessions to make sure our people have access to the care they need.
- Time away: With all of life’s demands, time away from work to disconnect and recharge is essential. In addition to country-specific holidays (12 in the U.S. and Canada), vacation and sick time start accruing right away (specifics vary by country). Everyone also takes a pause together on quarterly all-company wellness days, plus you get to celebrate the most personal holiday of all: your birthday.
- Parental leave: While Mozilla’s parental leave policies vary globally, our U.S. and Canadian-based employees can look forward to 26 weeks of paid leave for childbearing parents and 12 weeks of paid leave for non-childbearing parents.
- Financial: Mozilla is a private company, so our compensation isn’t tied to stock options or equity plans. Instead, we offer generous, performance-based bonus plans to all regular employees to underscore that we share in our success as one team. As for retirement savings for US and Canadian employees, Mozilla contributes a percentage of your eligible base salary each year to the 401(k) Plan/RRSP (regardless of whether you contribute or not), with 100% vesting.
- Learning and development: We’re big believers in learning by doing, and we also want to invest in your education and development beyond your role. Every employee is eligible for an annual professional development budget. Mozillians can put it toward technical or management training, certifications, conferences and more.
- Help when you need it: Life is full of surprises; that’s why it’s important to be prepared. Mozilla provides Life/AD&D and Short and Long Term Disability insurance (offerings may vary by locale) to ensure that you and your family will have a safety net in place should you ever need it.
- Plus a bit more: A few other benefits include a quarterly wellbeing stipend (to use on those things just for you), an employee referral bonus, internet reimbursement if you’re remote, and a budget for office essentials to make working remotely ergonomically comfortable.
Company HQ
Rincon Hill, San Francisco, CA
Leadership
Laura Chambers
(CEO)Alongside serving as the CEO at Mozilla, Laura is an Executive Fellow at Harvard Business School. Previously, she was the CEO and PResident at Willow Innovation, Director at Patelco Credit Union, and General Manager of Core Hosts & Community at Airbnb.
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