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

Information Technology

251-1K (750)

Founded 2005

$2M raised

41 open positions

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Senior Software Engineer, Firefox Security

4 weeks ago

Canada

Full-time

Senior

Software Engineer

Software Development

C C++ Encryption Rust

Apply Now

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 41

Description

Advance Firefox’s security architecture and cryptography stack, including cryptographic protocols, WebPKI, and security-sensitive web APIs.
Design and implement secure web platform features in collaboration with teammates and the broader web community.
Develop 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 fixes.
Contribute to technical discussions, design reviews, and project planning for security-related initiatives.
Help evaluate tradeoffs and contribute to engineering decisions within the area of work.

Requirements

Experience in software engineering with proficiency in C/C++.
Solid understanding of security principles, including cryptographic protocols and implementations.
Experience building, testing, maintaining, and contributing to complex software systems in large-scale or security-sensitive environments.
Strong debugging and problem-solving skills for multi-threaded, cross-platform native applications.
Ability to communicate technical concepts clearly and collaborate effectively with distributed teams.
Demonstrated curiosity and willingness to learn 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/AD&D, disability, and EAP coverage, varying by country.
Remote work designation (#LI-REMOTE).
Hiring salary range of $104,000–$139,000 CAD for Canada Tier 1 locations and $95,000–$126,000 CAD for Canada Tier 2 locations.

Interested in this position?

Apply directly on the company website

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