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Mozilla

Senior Software Engineer

Mozilla, Littlestown, Pennsylvania, United States

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Overview Employer Industry: Technology (Non-Profit-Backed)

Benefits

Salary up to €99,000 EUR

Generous performance-based bonus plans for all eligible employees

Rich medical, dental, and vision coverage

Considerable paid parental leave and generous retirement contributions with 100% immediate vesting

Opportunities for professional development and wellness stipends

Flexible remote work environment

Responsibilities

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 maintain platform safety and trust with a focus on security

Resolve user and developer issues, from minor bugs to larger incidents

Collaborate with designers, product managers, QA, and community contributors to deliver end-to-end improvements

Qualifications

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

Strong collaboration and communication skills in a distributed team environment

Preferred Qualifications

Experience with relational databases such as MySQL

Exposure to cloud infrastructure (Google Cloud or similar)

Contributions to open source projects

Experience mentoring or supporting junior developers

Familiarity with other frontend stacks such as Jinja2

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