Jobs at Mozilla

As a Senior Data Engineer, you'll build and manage data pipelines, ensure data quality, collaborate with teams, and uphold data governance at Mozilla.

The Senior Frontend Engineer role at Mozilla involves building user interfaces for Firefox, collaborating with designers, ensuring code quality, and mentoring fellow engineers. They focus on performance, security, and usability while working in a geographically-distributed team, contributing to open-source software.

Lead design, reliability, and evolution of hybrid-cloud and workplace infrastructure. Own domain architecture, drive complex migrations and reliability improvements, reduce toil via automation, mentor engineers, and ensure operational clarity through documentation, SLIs/SLOs, monitoring, and cross-team collaboration.

Build, operate, and optimize core AI platform components for training and serving ML models at scale. Own model serving, inference workflows, GPU orchestration, CI/CD for ML, observability, and deployment automation. Improve performance, reliability, and cost efficiency across CPU/GPU workloads, participate in incident response/on-call, mentor junior engineers, and collaborate with product, infrastructure, security, and data teams.

Operate and evolve an EKS-based Kubernetes platform, design CI/CD pipelines (GitHub Actions, OIDC), maintain infra-as-code (Pulumi/Terraform/OpenTofu) across AWS accounts, run observability stack, enforce security best practices, diagnose incidents and lead postmortems, participate in on-call rotation, and produce runbooks and documentation.

Execute digital marketing activities to grow Thunderbird's brand and users: create and publish social, blog, and email content; manage campaign calendars; track and report metrics; support email automation, surveys, and cross-functional campaign execution; and ensure consistent brand messaging.

The Technical Support Specialist will manage support tickets, troubleshoot technical issues, and assist users with Thunderbird products while identifying improvements in support processes.

The Front End Engineering Manager will lead a distributed team, driving improvements to the Firefox Desktop experience, managing multiple projects, and ensuring quality software delivery while fostering an inclusive team environment.