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Senior Software Engineer, Firefox Security

1 month, 4 weeks ago
Belgium
Full-time
Senior
Software Engineer
Software Development
C C++ Encryption Rust
Apply Now
Mozilla

Mozilla

Mozilla, the maker of Firefox, is a non-profit organization ensuring an open, safe, and accessible internet for all users worldwide.

Internet Software & Services
251-1K
Founded 2005
$2M raised
View All Jobs 29

Description

  • Advance Firefox’s security architecture and cryptography stack, including cryptographic protocols, WebPKI, and security-sensitive web APIs.
  • Design and implement web platform security features in collaboration with teammates and the broader web community.
  • Develop and ship standards-based, secure, and interoperable implementations across Firefox.
  • Investigate and resolve issues affecting browser stability, correctness, performance, memory usage, and resource efficiency.
  • Partner with engineers across teams to identify, prioritize, and address security issues.
  • Participate in debugging, root cause analysis, and implementation of long-term solutions.
  • Contribute to technical discussions, design reviews, and project planning for security-related initiatives.
  • Evaluate tradeoffs and help inform engineering decisions within your area of work.

Requirements

  • Strong software engineering experience with proficiency in C/C++.
  • Solid understanding of security principles, including cryptographic protocols and implementations.
  • Experience contributing to the design, implementation, testing, and maintenance of complex software systems.
  • Ability to diagnose and resolve issues in multi-threaded, cross-platform native applications.
  • Strong debugging and problem-solving skills, especially for performance and memory-related challenges.
  • Ability to work effectively with distributed teams and communicate technical concepts clearly.
  • Curiosity and willingness to deepen expertise in browser security, cryptography, and systems programming.
  • Familiarity with web technologies and interest or experience in Rust.
  • Comfort working within large, complex, multi-language codebases.

Benefits

  • Generous performance-based bonus plans for eligible employees.
  • Rich medical, dental, and vision coverage.
  • Generous retirement contributions with 100% immediate vesting.
  • Quarterly all-company wellness days.
  • Country-specific holidays plus a day off for your birthday.
  • One-time home office stipend.
  • Annual professional development budget.
  • Quarterly well-being stipend.
  • Considerable paid parental leave.
  • Employee referral bonus program.
  • Additional benefits such as life insurance, AD&D, disability, and EAP, depending on country.
  • Remote Belgium hiring range of €56,000 to €74,000 EUR.

Interested in this position?

Apply directly on the company website

Apply Now

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