Senior Software Engineer, Mozilla
+ Generous performance-based bonus plans to all eligible employees - we share in our success as one team
Internet software for people, not profit
Be an early applicant
Internet software for people, not profit
1001+ employees
Be an early applicant
+ Generous performance-based bonus plans to all eligible employees - we share in our success as one team
1001+ employees
Company mission
To ensure the internet remains open and accessible.
Role
Who you are
- 7+ years of experience in software development with a strong focus on backend technologies
- Deep expertise in Node.js and TypeScript, with experience building and leading backend engineering projects
- Proficiency with PostgreSQL and SQL query optimization; experience with query builders such as Knex is a plus
- Experience deploying and operating applications on Kubernetes
- Experience with GCP (Pub/Sub, Cloud Logging) with a solid understanding of DevOps and SRE collaboration
- Experience with Infrastructure as Code tools such as Terraform
- Experience with AWS (S3) or similar cloud storage services
- Hands-on experience with observability tooling including OpenTelemetry, Sentry, Prometheus, and Grafana
- Familiarity with Redis for caching and session management
- Experience with Next.js, React, and SCSS, with a willingness to contribute to full-stack development when needed
- Experience with modern testing practices including unit testing (Vitest), end-to-end testing (Playwright), and component testing
- Strong communication skills and ability to collaborate across engineering, product, and operations teams
- Experience mentoring junior engineers and driving technical excellence in code quality, testing, and process improvements
Desirable
- Stripe or payment platform integrations
- Mozilla Fluent or other i18n/l10n frameworks
- Storybook for component-driven development
- Performance/load testing
- Data breach intelligence or cybersecurity domain knowledge
What the job involves
- The Firefox Monitor Engineering Team builds tools that help people understand and respond to data breaches. We notify users when their credentials appear in exposed datasets and empower them to take back control of their online privacy. We operate at scale, serving millions of users, and our work sits at the intersection of security, data privacy, and product engineering
- As a Senior Software Engineer on the Firefox Monitor team, you will be a core contributor to a modern, cloud-native Node.js/TypeScript full-stack application. This role spans feature development, infrastructure ownership, and application support.
- You'll own backend systems and integrations that keep users informed and protected, help maintain and evolve the cloud infrastructure the application runs on, and play an active role in keeping the service reliable and healthy in production. You'll do this while collaborating closely with frontend, SRE, and product teams to deliver reliable, privacy-first features
- Lead backend development in Node.js and TypeScript, building and maintaining server-side logic within a Next.js full-stack architecture
- Design, implement, and maintain integrations with external data sources such as Have I Been Pwned (HIBP) and other breach intelligence providers, with a focus on data privacy and security
- Build and maintain event-driven systems using Google Cloud Pub/Sub, and own cloud infrastructure on GCP ( GKE) and AWS (S3, SES)
- Own and evolve the data layer, including PostgreSQL schema design and query optimization using Knex, and Redis caching strategies
- Work closely with our SRE team to maintain and improve production environments, including monitoring and alerting with OpenTelemetry, Sentry, Prometheus, and Grafana
- Triage and resolve production issues, partnering with SRE and support teams to investigate incidents, address bug reports, and keep the application running reliably
- Periodically rotate into a Base Load Engineer (BLE) role, handling releases, dependency updates, and incoming work requests from customer support and other stakeholders
- Partner with and support the frontend team in their work with React, TypeScript, Next.js, and SCSS, ensuring backend systems, APIs, and data contracts meet their needs
- Partner with cross-functional teams to align on project goals, ensure seamless frontend-backend integration, and contribute to API design and evaluations
- Participate in code reviews to maintain high standards of code quality and system reliability
- Participate in security and privacy reviews, ensuring all data protection measures meet compliance standards
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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