Mozilla seeks a senior staff-level browser engineer to design and implement experiments in browser engine subsystems (DOM, layout, rendering, JS runtimes, accessibility, etc.), prototype engine capabilities, instrument and measure performance and correctness, and work closely with a small technical team. Strong systems expertise in C++ or Rust, profiling, concurrency, and working in large codebases is required; experience with AI tools and open-source browser projects is a plus.

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.

Work on AMO to deliver features and architectural improvements across submission flows, automated moderation pipelines, DevHub and Reviewer tools. The role involves Python/Django backend work, React/TypeScript frontend, MySQL, asynchronous processing, improving CI/CD and developer platforms, observability, incident response, and writing technical documentation (ADRs, runbooks).

Work on the addons.mozilla.org stack to deliver features and architectural improvements across DevHub, Reviewer tools and automated moderation pipelines. The role centers on Python/Django backend work, React/TypeScript front-end, CI/CD and platform reliability (observability, deployments, incident response), and contributing to internal developer platforms and engineering standards.

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.

Work on AMO systems including DevHub, Reviewer tools, automated moderation pipelines, and internal developer platforms. The role emphasizes Python/Django backend work, React/TypeScript frontend, CI/CD and infrastructure-as-code, observability and SRE practices, technical documentation, and contributing in the open.

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.

Mozilla is hiring a Staff Operations Engineer to lead architecture, reliability, and evolution of hybrid-cloud and workplace infrastructure. The role requires 6+ years in systems/infrastructure engineering and experience with VMware, Cisco UCS, Linux/Unix, networking (DNS, TCP/IP), data center environments, automation/IaC (Puppet/Ansible), Python, observability, and containerization. US-based remote; listed salary ranges span approximately $139,000–$218,000 USD annually across tiers.

Staff Operations Engineer responsible for designing and operating scalable, secure hybrid-cloud and on-prem infrastructure (compute, DNS, networking, identity, load balancers, data centers). Leads cross-team initiatives, drives migrations and reliability improvements, builds automation and IaC, mentors engineers, and maintains runbooks. Preferred experience with Puppet/Ansible, Python, observability, and containerization. Remote (Canada).

The Staff Operations Engineer will lead architecture, reliability, and evolution of hybrid-cloud and workplace infrastructure, drive complex cross-team initiatives (migrations, re-architectures, performance/reliability work), and remain hands-on with critical systems. Required: 6+ years in systems/infrastructure engineering and strong experience with VMware, Cisco UCS, load balancers, Linux/Unix, DNS/TCP-IP/routing/firewalls and data center environments. Preferred skills include IaC (Puppet/Ansible), Python, observability, containerization, and security best practices. Posting lists a salary range of €81,000–€108,000 (year) and is for Remote Germany.

Mozilla is hiring a Staff Operations Engineer to own and evolve architecture within a defined infrastructure domain, lead high-impact infrastructure projects (migrations, re-architectures, performance/reliability improvements), and improve operations through automation, observability, and documentation. Requires 6+ years in systems/infrastructure roles and expertise with VMware, Cisco UCS, load balancers, Linux/Unix, networking (DNS, TCP/IP), and data center environments; IaC (Puppet/Ansible), Python, observability, and container experience are preferred.

Work on full-stack features and architecture for addons.mozilla.org (DevHub, Reviewer tools, automated moderation pipelines). Responsibilities include React/TypeScript frontends, Django backend, MySQL, observability, deployments, monitoring, incident response, security, and collaborating with engineers, reviewers, product, and community contributors. Role emphasizes open-source collaboration and ecosystem safety.

Join the Add-ons team to deliver features and architectural improvements across AMO (DevHub, Reviewer tools, automated moderation). Work primarily with Python/Django, MySQL, React/TypeScript and asynchronous systems, improve CI/CD and infrastructure-as-code, and build observability and reliability practices for production services. Remote role based in Canada with stated annual hiring ranges.