Staff Software Engineer, 0DIN

Why Mozilla?

Mozilla Corporation is the non-profit-backed technology company that has shaped the internet for the better over the last 25 years. We make pioneering brands like Firefox, the privacy-minded web browser. Now, with more than 225 million people around the world using our products each month, we’re shaping the next 25 years of technology and helping to reclaim an internet built for people, not companies. Our work focuses on diverse areas including AI, social media, security and more. And we’re doing this while never losing our focus on our core mission – to make the internet better for people. 

The Mozilla Corporation is wholly owned by the non-profit 501(c) Mozilla Foundation. This means we aren’t beholden to any shareholders — only to our mission. Along with thousands of volunteer contributors and collaborators all over the world, Mozillians design, build and distribute open-source software that enables people to enjoy the internet on their terms. 

About this team and role:

In the rapidly advancing world of technology, GenAI and deep learning models are transforming our digital interactions. 0DIN, a next-generation bug bounty program, is here to secure these AI services that are becoming essential to our daily lives.

0DIN's mission is simple: identify, fix and prevent security flaws in popular AI services. By rewarding security researchers, 0DIN aims to uncover new types of vulnerabilities in GenAI and provide those learnings to the AI builders of the future.

The rise in AI adoption, exemplified by platforms like ChatGPT, highlights the urgent need for security. 0din fosters a collaborative environment where innovation in security is both recognized and rewarded, ensuring these technologies remain safe and trustworthy.

0DIN is more than just an initiative; it's a testament to Mozilla's commitment to digital safety and trust.

What you’ll do:

• Backend & System Design
• Build and scale APIs and backend services, with a focus on Ruby on Rails.
• Implement real-time validation, monitoring, and security enforcement for AI-driven workflows.
• Evaluate and integrate open source and custom software solutions.
• Deploy and manage applications in cloud-native environments (Kubernetes, Terraform, multi-cloud).
• Application Development
• Develop Rails-based features for enterprise integration, compliance reporting, and security workflows.
• Build intuitive front-end components, including charting and visualization tools for monitoring and analytics.
• Ensure reliability and scalability of services with performance targets (e.g., P95 <15ms latency, 99.99% availability).
• Collaboration & Leadership
• Work with security researchers and product leaders to define the roadmap.
• Mentor engineers and contribute to a high-performing technical team.

What you’ll bring:

• 10+ years of proven experience in backend systems, distributed infrastructure, or security engineering.
• Strong modern Ruby on Rails expertise with solid backend architecture experience.
• Deployment experience across modern cloud-native stacks (Docker, Kubernetes, Helm, Terraform, multi-cloud).
• Front-end development skills, particularly with data visualization and charting frameworks (e.g., Chart.js, echarts, or similar).
• Strong programming skills in at least one additional language (Python, Go, Rust, or Java).
• Familiarity with AI/ML security challenges (adversarial ML, content filtering, prompt injection).

Nice to have:

• Contributions to open-source security or AI projects.
• Experience with enterprise integrations (SIEM/SOAR, SOC tools, HIPAA, PCI-DSS, SOC2, ISO, GDPR).
• Background in adversarial ML research or compliance-focused security.

What success looks like:

• 90 days: Build key product features for on prem and cloud native core products.
• 6 months: Build out policy creation, compliance reporting, and chart-driven analytics dashboards.
• 12 months: Achieve global adoption with a secure, scalable Rails platform powering predictive defenses.
• Commitment to our values:

• Welcoming differences
• Being relationship-minded
• Practicing responsible participation
• Having grit

What you’ll get:

• Generous performance-based bonus plans to all eligible employees - we share in our success as one team
• Rich medical, dental, and vision coverage
• Generous retirement contributions with 100% immediate vesting (regardless of whether you contribute)
• Quarterly all-company wellness days where everyone takes a pause together
• Country specific holidays plus a day off for your birthday
• One-time home office stipend
• Annual professional development budget
• Quarterly well-being stipend
• Considerable paid parental leave
• Employee referral bonus program
• Other benefits (life/AD&D, disability, EAP, etc. - varies by country)

About Mozilla 

Mozilla exists to build the Internet as a public resource accessible to all because we believe that open and free is better than closed and controlled. When you work at Mozilla, you give yourself a chance to make a difference in the lives of Web users everywhere. And you give us a chance to make a difference in your life every single day. Join us to work on the Web as the platform and help create more opportunity and innovation for everyone online.

Commitment to diversity, equity, inclusion, and belonging

Mozilla understands that valuing diverse creative practices and forms of knowledge are crucial to and enrich the company’s core mission.  We encourage applications from everyone, including members of all equity-seeking communities, such as (but certainly not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientations, gender identities, and expressions.

We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at hiringaccommodation@mozilla.com to request accommodation.

We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws.  Mozilla will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose.

Group: C

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Req ID: R2943