Senior Security Engineer (Bug Bounty)

At Mozilla, we believe the internet is a global public resource—open and accessible to all

As a Security Engineer, you’ll protect that vision by building, breaking, and hardening products that put people’s privacy and safety first

We are looking for a security engineer to own, manage and administer the Mozilla Web Bug Bounty program and work with Mozilla product and SIRT teams to ensure risk mitigation of security incidents and events

Own and scale Mozilla’s web bug bounty program, including strategy, prioritization, KPIs, and continuous improvement

Act as the primary interface with external researchers and platforms (e.g., HackerOne), fostering a high-quality and trusted research community

Lead triage and technical validation of incoming reports across multiple intake channels (HackerOne, Bugzilla, email)

Drive end-to-end vulnerability remediation, partnering with engineering teams to ensure timely, effective fixes

Identify root causes and systemic issues, and influence long-term improvements in secure development practices

Collaborate with the Security Incident Response Team (SIRT) on active incidents and post-incident reviews

Perform targeted code reviews (primarily JavaScript and Python) during investigations and high-risk changes

Develop or leverage tooling to improve triage efficiency, signal quality, and program insights

Benefits

• Health and wellness: Mozilla covers medical, dental and vision plan premiums at 100% for U.S. and Canadian employees. Our offerings give you the options you need to manage your health — and your family’s — the way you want.
• Mental health: Mental health is as important as our physical health. That’s why Mozilla’s health benefits include therapy and coaching sessions to make sure our people have access to the care they need.
• Time away: With all of life’s demands, time away from work to disconnect and recharge is essential. In addition to country-specific holidays (12 in the U.S. and Canada), vacation and sick time start accruing right away (specifics vary by country). Everyone also takes a pause together on quarterly all-company wellness days, plus you get to celebrate the most personal holiday of all: your birthday.
• Parental leave: While Mozilla’s parental leave policies vary globally, our U.S. and Canadian-based employees can look forward to 26 weeks of paid leave for childbearing parents and 12 weeks of paid leave for non-childbearing parents.
• Financial: Mozilla is a private company, so our compensation isn’t tied to stock options or equity plans. Instead, we offer generous, performance-based bonus plans to all regular employees to underscore that we share in our success as one team. As for retirement savings for US and Canadian employees, Mozilla contributes a percentage of your eligible base salary each year to the 401(k) Plan/RRSP (regardless of whether you contribute or not), with 100% vesting.
• Learning and development: We’re big believers in learning by doing, and we also want to invest in your education and development beyond your role. Every employee is eligible for an annual professional development budget. Mozillians can put it toward technical or management training, certifications, conferences and more.
• Help when you need it: Life is full of surprises; that’s why it’s important to be prepared. Mozilla provides Life/AD&D and Short and Long Term Disability insurance (offerings may vary by locale) to ensure that you and your family will have a safety net in place should you ever need it.
• Plus a bit more: A few other benefits include a quarterly wellbeing stipend (to use on those things just for you), an employee referral bonus, internet reimbursement if you’re remote, and a budget for office essentials to make working remotely ergonomically comfortable.
• Experience operating bug bounty programs, including enhancements, automation and scaling, and/or bug hunting
• Formal credentials are great, but real-world experience, curiosity, passion and a growth mindset matter more
• Ability to develop your own tools as needed in a variety of programming languages (eg. Python, Go, Rust, Javascript, etc.) is a plus, but not required
• 3+ years of demonstrated ability in a security engineering role
• Practical experience working with modern cloud technologies (eg. Amazon Web Services, Google Cloud Platform, Heroku, Microsoft Azure, etc.)
• Experience analyzing code and systems to move from vulnerability → root cause → prevention
• Strong communication, collaboration, and problem-solving skills, with the ability to influence and guide cross-functional teams
• Real-world experience in software development and/or engineering operations

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