Senior Staff Software Engineer, Mozilla
0DIN
$165-283k
Actual salary range is dependent on location. Offers performance-based bonus plans
Internet software for people, not profit
Open for applications
Internet software for people, not profit
1001+ employees
Open for applications
$165-283k
Actual salary range is dependent on location. Offers performance-based bonus plans
1001+ employees
Company mission
To ensure the internet remains open and accessible.
Role
Who you are
- 15+ years proven experience in backend systems and distributed infrastructure
- Deep understanding of cloud-native deployments (Kubernetes, Helm, Terraform, multi-cloud)
- Strong programming skills in at least two of: Python, Go, Rust, Ruby or Java
- Experience with inline enforcement systems, firewalls, or high-performance APIs
- Experience in Security Product Development
- Familiarity with AI/ML security challenges (adversarial ML, content filtering, prompt injection)
- Expertise in leveraging AI tools in the development workflow
Desirable
- Contributions to open-source AI safety or security projects
- Experience with streaming protocols (gRPC, WebSocket, SSE) and edge/CDN deployments
- Background in adversarial ML research, red-teaming, or compliance-focused security
What the job involves
- 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
- Build ultra-low-latency request/response enforcement pipelines capable of 10k+ Requests Per Second (RPS) per node
- Implement real-time input/output validation, multi-turn monitoring, and adversarial pattern detection
- Engineer flexible deployment options, including reverse proxy, sidecar, SDK, edge, and on-premises
- Evaluate and recommend open source and custom software solutions
- Integrate real-world threat intelligence into adaptive rules and signatures
- Develop semantic attack detection, evasion handling, and contextual monitoring
- Enable configurable enforcement actions: block, redact, replace, or log-only
- Deliver compliance-ready logging, alerting, and severity scoring pipelines
- Support integrations with SIEM/SOAR, SOC tools, and regulatory frameworks (HIPAA, PCI-DSS, GDPR, SOC2, ISO, NIST)
- Provide SDKs and APIs for rapid developer adoption
- Achieve P95 <15ms latency, 99.99% availability, and linear scalability under load
- Build distributed infrastructure optimized for edge and cloud environments
- Partner with security researchers and product leaders to define the roadmap
- Mentor engineers and help grow a high-performing technical team
- What success looks like:
- 90 days: Deliver MVP prototype with real-time detection and <50ms latency
- 6 months: Reach enterprise readiness with multi-turn detection, policy creation, and SDKs
- 12 months: Achieve industry-leading latency, global adoption, and predictive defenses
Our take
Mozilla develops a range of free and open-source software, with its most familiar product being Firefox. Operated with a mission-driven, not0for-profit ethos, Mozilla champions online privacy, open standards and user-choice.
Beyond Firefox, Mozilla has focused on privacy forward offerings such as Mozilla VPN, which allows users to browse securely without being tracked. The company has also streamlined its product portfolio to concentrate on initiatives that align closely with its core mission, ensuring resources are dedicated to improving user experiences while fostering safer, more open digital environments.
Alongside this, its impact extends into the developer and tech community, having played a pivotal role in the creation of Rust, a systems programming language celebrated for its speed and efficiency. With a loyal user base, ongoing innovation, and a clear commitment to privacy and open-source principles, Mozilla remains an influential player in the technology landscape.
Freddie
Company Specialist at Welcome to the Jungle
Insights
12% employee growth in 12 months
Company
Funding (last 2 of 3 rounds)
Apr 2018
$1.2m
GRANT
Jan 2005
$0.3m
ANGEL
Total funding: $3.5m
Company 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.
Company HQ
Rincon Hill, San Francisco, CA
Leadership
Laura Chambers
(CEO)Alongside serving as the CEO at Mozilla, Laura is an Executive Fellow at Harvard Business School. Previously, she was the CEO and PResident at Willow Innovation, Director at Patelco Credit Union, and General Manager of Core Hosts & Community at Airbnb.
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