Senior Backend Engineer, Ecosystems
Core
Build and own back-end systems, integrations, and cloud infrastructure for Mozilla products like Firefox, VPN, and Relay to ensure reliability and security for millions of users.
Role type
Senior IC backend engineer (distributed systems & cloud infrastructure)
Builds
Privacy services, Web Push platforms, configuration management systems, and APIs for Firefox and Mozilla services
Domain
Internet infrastructure, privacy, security, open-source software
Deliverable
production ML models | product features | infrastructure
Required skills
Python, TypeScript/Node.js, Rust, PostgreSQL, SQL query optimization, Google Cloud Platform (GCP), Docker, observability tooling (Sentry, Grafana, Prometheus, OpenTelemetry), on-call support, code reviews, security/privacy compliance
Preferred skills
Performance/load testing, Infrastructure as Code (Terraform, Kubernetes), Django, open-source contributions
Technologies
Python, TypeScript, Node.js, Rust, PostgreSQL, Knex, GCP, Docker, Sentry, Grafana, Prometheus, OpenTelemetry, Terraform, Kubernetes, Django
Responsibilities
Lead backend development and maintain server-side logic; deploy, operate, and monitor services in production; participate in on-call rotation for incident resolution; handle releases and dependency updates; partner with frontend and cross-functional teams on API design and data contracts; conduct code reviews and security/privacy reviews
Seniority
Senior, hands-on IC with mentorship responsibilities