Staff Security Engineer, Product Security
WFA Digital Insight
As the demand for digital security specialists surges, Mozilla is at the forefront of this trend. With a 25% increase in cybersecurity threats in 2025, companies are scrambling to find experts who can safeguard their products. This Staff Security Engineer role is a prime example of a position that requires a rare blend of technical expertise and strategic thinking. To succeed, candidates will need to demonstrate a deep understanding of secure coding practices, threat modeling, and security assessments. What sets Mozilla apart is its commitment to open-source software and a people-centric approach to technology. Before applying, candidates should be prepared to showcase their expertise in application security and their ability to collaborate with cross-functional teams.
Job Description
About the Role
The Staff Security Engineer role at Mozilla is a critical position that requires a unique blend of technical expertise and strategic thinking. As a key member of the product security team, you will be responsible for building, breaking, and hardening products that put people's privacy and safety first. This role is perfect for individuals who are passionate about security and want to make a meaningful impact on the internet.The product security team at Mozilla is a dynamic and collaborative group that is dedicated to protecting millions of users worldwide. As a Staff Security Engineer, you will be working closely with cross-functional teams, including engineering, product, and design, to ensure that security is integrated into every aspect of the product development lifecycle.
What You Will Do
- Safeguard millions of users by embedding security into Firefox, Mozilla VPN, and other mission-critical products.
- Ensure software products are secure by embedding security into the full Software Development Life Cycle (SDLC).
- Anticipate, prioritize, and mitigate risks through proactive threat modeling, security assessments, security testing, and automation.
- Perform security code reviews to identify vulnerabilities and provide recommendations for remediation.
- Lead penetration testing on web, mobile, and embedded applications, then guide remediation efforts.
- Develop and maintain automated security tests within CI/CD pipelines to catch vulnerabilities early.
- Partner with engineers to integrate security throughout the software development lifecycle.
- Help define and enforce security policies and provide security guidance to development teams.
- Help shape Mozilla's security culture through collaboration, guidance, and education.
What We Are Looking For
- Expertise in secure coding practices, application security tools (SAST, DAST), and a strong understanding of modern architecture, cloud environments (AWS, Azure, GCP), and various programming languages.
- Experience with threat modeling, security assessments, and security testing.
- Strong understanding of security principles, including confidentiality, integrity, and availability.
- Experience with automation and scripting languages, such as Python or Ruby.
- Excellent communication and collaboration skills, with the ability to work with cross-functional teams.
- Strong problem-solving skills, with the ability to analyze complex security issues and develop effective solutions.
- Experience with agile development methodologies and version control systems, such as Git.
Nice to Have
- Experience with cloud security, including AWS, Azure, or GCP.
- Experience with containerization, including Docker or Kubernetes.
- Experience with security information and event management (SIEM) systems.
- Experience with incident response and remediation.
- Certification in security, such as CISSP or CEH.
Benefits and Perks
- Competitive salary and benefits package.
- Opportunities for professional growth and development.
- Collaborative and dynamic work environment.
- Flexible working hours and remote work options.
- Access to the latest technologies and tools.
- Comprehensive health insurance and wellness programs.
- Generous paid time off and holidays.
- Retirement savings plan and matching program.
How to Stand Out
- Tip: Make sure to highlight your experience with secure coding practices and application security tools in your resume and cover letter.
- To stand out, create a portfolio that showcases your security projects and accomplishments.
- Be prepared to discuss your approach to threat modeling and security assessments in the interview.
- Show your passion for security and your commitment to ongoing learning and professional development.
- Don't be afraid to ask questions about the company culture and security team during the interview.
- Research the company's security policies and procedures to demonstrate your interest and knowledge.
- Be prepared to provide examples of your experience with automation and scripting languages.
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