Mozilla is hiring a Senior Software Engineer to design, build, deploy, and operate backend services for Ecosystem Services. The role emphasizes end-to-end ownership, collaboration with frontend, CloudEng and product teams, on-call production support, observability (OpenTelemetry, Sentry, Prometheus, Grafana), and hands-on GCP and Docker-based deployment experience. Required: 4+ years backend development experience with Python, TypeScript/Node.js, or Rust and familiarity with PostgreSQL and SQL optimization.

Mozilla is hiring Senior Software Engineers for multiple Ecosystem Services backend teams to design, build, deploy, and operate backend platforms focused on privacy, security, and reliability. The role requires end-to-end ownership of services, collaboration with cross-functional teams, on-call rotation, and hands-on experience with backend languages (Python/TypeScript/Node.js or Rust), PostgreSQL, Docker, and GCP-based deployments and observability tooling.

Join Mozilla's Ecosystem Services Team to build, operate, and maintain back-end platforms used by Firefox and other Mozilla products. Responsibilities include backend development, cloud deployments and operations (GCP/Docker), observability and monitoring (OpenTelemetry, Sentry, Prometheus, Grafana), participating in on-call rotations, API design, and collaborating with frontend, CloudEng, product, and UX teams. Requires 4+ years of software development experience with strong backend focus and professional experience in Python, TypeScript/Node.js, or Rust, plus PostgreSQL and hands-on GCP/DevOps experience.

Join Mozilla's Add-ons (AMO) team to deliver features and architectural improvements across submission flows, automated moderation pipelines, DevHub, and reviewer tools. The role emphasizes Python/Django backend work, React/TypeScript frontend, MySQL, asynchronous processing, CI/CD and infrastructure-as-code, observability, incident response, and improving developer platforms. Position is remote for Germany with a hiring range of €68,000–€91,000 EUR per year.

Join Mozilla's Add‑Ons team to deliver features and architectural improvements across AMO (DevHub, Reviewer tools, automated moderation). Role emphasizes Python/Django backend development, CI/CD and pipeline-as-code, observability (metrics, logging, tracing, SLOs), platform reliability, internal developer tooling, and production incident practices. Position is remote (UK) with a listed salary range of £66,000–£87,000.

Remote (Spain) Senior Software Engineer role on the Add-ons team to deliver features and architectural improvements across AMO (DevHub, Reviewer tools, moderation pipelines). Work includes backend and frontend development (Python/Django, React/TypeScript), improving CI/CD and infrastructure-as-code, building observability and reliability practices, and contributing in the open. Salary range listed: €58,000–€77,000 EUR (annual).

Join Mozilla’s Add-ons team to deliver features and architectural improvements across AMO (DevHub, Reviewer tools, automated moderation). Role centers on Python/Django backend, React/TypeScript frontend, CI/CD and infrastructure-as-code, observability, reliability and incident response. Hiring range for Remote Belgium: €56,000–€74,000 EUR/year.

Join the Add‑Ons team to deliver features and architectural improvements across AMO, DevHub, Reviewer tools, and automated moderation systems. The role involves Python/Django backend and React/TypeScript frontend work, improving CI/CD and observability, operating production services, and contributing in the open. Remote role based in Sweden; listed salary range: 512,925–683,900 SEK per year.