Senior Software Engineer, Add-Ons

Responsibilities

• Deliver major features and architectural improvements across the Add-ons stack, including automated moderation pipelines, Reviewer tools, and DevHub
• Create robust observability systems and data-backed insights
• Improve platform reliability through deployments, monitoring, and incident response on Google Cloud
• Resolve issues impacting users and developers, from small bugs to larger incidents
• Collaborate with designers, product managers, QA, and community contributors
• Contribute to open source through pull requests, code reviews, and discussions

Requirements

• Experience building modern web applications
• Strong experience with Python/Django or similar backend frameworks
• Understanding of web security principles and practices
• Strong collaboration and communication skills in a distributed team environment

Preferred Qualifications

• Experience building automated security systems
• Exposure to cloud infrastructure (Google Cloud or similar)
• Contributions to open source projects
• Experience with policy-compliant ecosystem moderation tools

Benefits

• Performance-based bonus plans
• Medical, dental, and vision coverage
• Retirement contributions with 100% immediate vesting
• Quarterly all-company wellness days
• Home office stipend and professional development budget
• Paid parental leave

About the Company

Mozilla is a non-profit-backed technology company that shapes the internet for the better. They create pioneering brands like Firefox and focus on making the internet a public resource accessible to all, prioritizing privacy and open-source software.