Senior Software Engineer, Firefox Security

Mozilla
Germany
Workplace: RemoteFull timeEUR 68,000 - 91,000 annuallyFunction: Software EngineeringSkills: ["Security","Cryptography","Memory management","Multithreading","Design review","Communication"]

Join Mozilla as a Senior Software Engineer focusing on cryptography and security for Firefox. You’ll advance the cryptography stack, build security features for the web platform, and improve browser reliability in a multi-threaded environment. Collaborate across teams to drive security initiatives, participate in technical design, and contribute to open-source, multi-language codebases with a growth mindset and interest in Rust.

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FursaFursa
Mozilla
Mozilla
2 months ago

Senior Software Engineer, Firefox Security

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Source: Company careers pageValidated by: Fursa AI
Last checked: 20 hours agoStatus: Live

Job Summary

Join Mozilla as a Senior Software Engineer focusing on cryptography and security for Firefox. You’ll advance the cryptography stack, build security features for the web platform, and improve browser reliability in a multi-threaded environment. Collaborate across teams to drive security initiatives, participate in technical design, and contribute to open-source, multi-language codebases with a growth mindset and interest in Rust.
Location: Germany
Workplace: Remote
Employment Type: Full time
Job Function: Software Engineering
Seniority: Sr. Manager level

Key Responsibilities

  • •Advance Firefox’s security architecture and cryptography stack by contributing to improvements in core security systems, focusing on cryptographic protocols, WebPKI, and security-sensitive web APIs.
  • •Design and implement web platform security features and ship standards-based, secure, interoperable 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 and participate in debugging and root cause analysis.
  • •Contribute to technical design and planning through engagement in design reviews and project planning for security-related initiatives.

Pay and Benefits

Salary: EUR 68,000 - 91,000 annually
Perks:Health InsuranceAnnual BonusHome OfficeLearning BudgetWell-being StipendPensionDentalVisionLife Insurance

Key Requirements

  • •Strong software engineering and security fundamentals with proficiency in C/C++ and cryptographic protocol understanding.
  • •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 focusing on performance and memory management.
  • •Collaborative and effective communicator with experience working with distributed teams.
  • •Willingness to learn and interest in web platform security and Rust; comfortable with large, multi-language codebases.
Experience:Browser securityCryptographyOpen sourceWeb platform
Skills:SecurityCryptographyMemory managementMultithreadingDesign reviewCommunication
Languages:English
Tech Stack:CC++RustWebPKICryptographyMemory managementMultithreading

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
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