Senior Security Engineer – Firefox Web Crypto

Mozilla Corporation; Spain (TX); Hybrid; USD 81,000 - 127,000; Full time

Benefits offered by this job

Performance-based bonus

Medical, dental, and vision coverage

Retirement contributions

Home office stipend

Well-being stipend

Parental leave

Employee referral program

Other benefits

Job summary

The Mozilla Corporation is seeking a Senior Software Engineer focused on Firefox security. This remote Spain role emphasizes cryptographic protocols, WebPKI, and secure web APIs across large-scale, multi-language codebases.

You will design and ship web platform security features, partner with engineers globally, and contribute to technical design reviews, while maintaining highly secure software systems.

Qualifications

• Experience in software engineering with proficiency in C/C++ and cryptographic protocols.
• Ability to diagnose and resolve issues in multi-threaded, cross-platform native applications.
• Strong communication and collaboration with distributed teams.

Responsibilities

• Advance Firefox security architecture and cryptography stack.
• Design and implement web platform security features across Firefox.
• Collaborate on security initiatives and contribute to long-term solutions.
• Contribute to technical design, planning, and engineering decisions.

Skills

C/C++

Security fundamentals

Debugging

Collaboration

Web platform

Rust

Job description

The Mozilla Corporation is seeking a Senior Software Engineer focused on Firefox security. This remote Spain role emphasizes cryptographic protocols, WebPKI, and secure web APIs across large-scale, multi-language codebases.

You will design and ship web platform security features, partner with engineers globally, and contribute to technical design reviews, while maintaining highly secure software systems.