Senior Software Engineer
Remote · Remote US · 4+ years experience · Remote · Posted Sep 24, 2026
At a glance
- Experience
- 4+ years experience
- Workplace
- Remote
- Location
- Remote · Remote US
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: D
About the role
- As a Senior Software Engineer on the Ecosystem Services Team, you'll build and own back-end systems and the integrations that keep services running.
- You will help maintain and evolve the cloud infrastructure the application runs on while playing an active role in keeping the service reliable and healthy in production.
- Collaborate closely with frontend engineers, product managers, CloudEng, and UX and design partners to deliver reliable features.
Responsibilities
- Lead backend development, building and maintaining server-side logic
- Take real ownership of the services you work on: deploy them, operate them, and keep them healthy in production rather than handing them off
- Work closely with our CloudEng Team to maintain and improve production environments, including monitoring and alerting with tools such as OpenTelemetry, Sentry, Prometheus, and Grafana
- Participate in an on-call / off-hours support rotation, triaging and resolving production issues, partnering with CloudEng and support teams to investigate incidents, address bug reports, and keep the application running reliably
- Periodically rotate into a support role, handling releases, dependency updates, and incoming work requests from customer support and other stakeholders
- Thoughtfully apply AI-assisted development tools to move faster and raise quality, while maintaining good judgment about where they fit and where they don't
- Partner with and support stakeholders (e.g. front-end, platform), ensuring backend systems, APIs, and data contracts meet their needs
- Partner with frontend and cross-functional teams to align on project goals, contribute to API design, and ensure backend systems, APIs, and data contracts meet their needs
- 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
Requirements
- 4+ years of experience in software development with a strong focus on backend technologies
- Strong professional experience with Python, TypeScript/Node.js, or Rust building back-end services and confidence leading back-end engineering projects
- Proficiency with PostgreSQL and SQL query optimization, including relational schema design and migrations with a query builder such as Knex
- Hands-on DevOps experience on Google Cloud Platform (GCP), with Docker-based build and deploy pipelines
- Hands-on experience with observability and monitoring tooling such as Sentry and Grafana
- A pragmatic commitment to shipping quality work
- Strong engineering judgment to navigate ambiguity, weigh trade-offs, and make sound decisions with incomplete information
- A genuine ownership mindset with experience operating what you build in production, including experience with on-call or off-hours production support
- Experience mentoring junior engineers and driving technical excellence in code quality, testing, and process improvements
Preferred qualifications
- Performance / load testing
- Experience with IaC tools such as Terraform and Kubernetes
- Open-source contributions or personal engineering projects
- Django experience
Benefits
- Generous performance-based bonus plans to all eligible employees
- Rich medical, dental, and vision coverage
- Generous retirement contributions with 100% immediate vesting
- Quarterly all-company wellness days
- 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
Workplace
- Remote Canada or Remote US
Skills
- Python
- TypeScript
- Node.js
- Rust
- PostgreSQL
- SQL
- Knex
- Google Cloud Platform (GCP)
- Docker
- OpenTelemetry
- Sentry
- Prometheus
Show all 15 skills
- Grafana
- Terraform
- Kubernetes
