Mozilla

4 weeks ago

Senior Software Engineer, Firefox Security

✓ Verified Job

Canonical indexed version, validated from employer's careers page.

Source: Company careers pageValidated by: Fursa AI

Last checked: 6 hours agoStatus: Live

Job Summary

Join Mozilla to advance Firefox security architecture and cryptography, shaping core security systems, cryptographic protocols, and WebPKI. Design and ship web platform security features, improve browser reliability and performance, collaborate across teams on security initiatives, and contribute to technical design and planning for security-related work in a large, multi-language codebase.

Location: Sweden

Workplace: Remote

Employment Type: Full time

Job Function: Software Engineering

Seniority: Manager level

Key Responsibilities

•Advance Firefox's security architecture and cryptography stack, focusing on cryptographic protocols, WebPKI, and security-sensitive web APIs; help implement and maintain security features supporting the web's PKI evolution.
•Design and implement web platform security features; develop and ship web platform features in collaboration with teammates and the broader web community for standards-based, secure implementations across Firefox.
•Improve browser reliability, performance, and resource efficiency by investigating and resolving issues affecting stability and memory usage in a multi-threaded environment.
•Collaborate on security initiatives by partnering with engineers across teams to identify, prioritize, and address security issues; participate in debugging and root cause analysis.
•Contribute to technical design and planning by engaging in design reviews and project planning for security initiatives and evaluating tradeoffs.

Pay and Benefits

Salary: SEK 513,000 - 684,000 annually

Perks:Health InsuranceDentalVisionRemote WorkLearning BudgetHome OfficeWellness StipendPaid ParentalAnnual BonusLife/ad&d

Key Requirements

•Strong software engineering and security fundamentals with proficiency in C/C++ and solid understanding of cryptographic principles and implementations.
•Experience building and maintaining complex software systems in large-scale or security-sensitive environments.
•Strong debugging and problem-solving skills for multi-threaded, cross-platform native applications, including performance and memory-related challenges.
•Collaborative and effective communication skills; ability to work with distributed teams and explain complex concepts clearly.
•Growth mindset with willingness to learn, curiosity about browser security, cryptography, and systems programming; familiarity with web technologies and Rust is a plus.

Experience:Browser securityOpen sourceWeb platform

Skills:SecurityCryptographyMulti-threadingMemory managementRustC++WebPKIWeb platform securityDebuggingCollaboration

Languages:English

Tech Stack:CC++RustWebPKICryptographyMultithreadingMemory management

Company Brief

Mozilla

Mozilla is a mission-driven organization that builds open-source internet products (notably the Firefox browser) and advocates for an open, private, and secure web through software, research, and community programs.

Industry: Enterprise Software

Company Size: Large (251 to 1,000 employees)

Growth: Nonprofit & NGO

Headquarters: San Francisco, United States

Founded: 1998

Glassdoor: 2.9

Website LinkedIn Glassdoor

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Mozilla

4 weeks ago

Senior Software Engineer, Firefox Security

✓ Verified Job

Canonical indexed version, validated from employer's careers page.

Source: Company careers pageValidated by: Fursa AI

Last checked: 6 hours agoStatus: Live

Job Summary

Location: Sweden

Workplace: Remote

Employment Type: Full time

Job Function: Software Engineering

Seniority: Manager level

Key Responsibilities

•Advance Firefox's security architecture and cryptography stack, focusing on cryptographic protocols, WebPKI, and security-sensitive web APIs; help implement and maintain security features supporting the web's PKI evolution.
•Design and implement web platform security features; develop and ship web platform features in collaboration with teammates and the broader web community for standards-based, secure implementations across Firefox.
•Improve browser reliability, performance, and resource efficiency by investigating and resolving issues affecting stability and memory usage in a multi-threaded environment.
•Collaborate on security initiatives by partnering with engineers across teams to identify, prioritize, and address security issues; participate in debugging and root cause analysis.
•Contribute to technical design and planning by engaging in design reviews and project planning for security initiatives and evaluating tradeoffs.

Pay and Benefits

Salary: SEK 513,000 - 684,000 annually

Perks:Health InsuranceDentalVisionRemote WorkLearning BudgetHome OfficeWellness StipendPaid ParentalAnnual BonusLife/ad&d

Key Requirements

•Strong software engineering and security fundamentals with proficiency in C/C++ and solid understanding of cryptographic principles and implementations.
•Experience building and maintaining complex software systems in large-scale or security-sensitive environments.
•Strong debugging and problem-solving skills for multi-threaded, cross-platform native applications, including performance and memory-related challenges.
•Collaborative and effective communication skills; ability to work with distributed teams and explain complex concepts clearly.
•Growth mindset with willingness to learn, curiosity about browser security, cryptography, and systems programming; familiarity with web technologies and Rust is a plus.

Experience:Browser securityOpen sourceWeb platform

Skills:SecurityCryptographyMulti-threadingMemory managementRustC++WebPKIWeb platform securityDebuggingCollaboration

Languages:English

Tech Stack:CC++RustWebPKICryptographyMultithreadingMemory management

Company Brief

Mozilla

Industry: Enterprise Software

Company Size: Large (251 to 1,000 employees)

Growth: Nonprofit & NGO

Headquarters: San Francisco, United States

Founded: 1998

Glassdoor: 2.9

Website LinkedIn Glassdoor