Jobs at Mozilla

Build, maintain, and evolve Mozilla’s Internal Developer Infrastructure Platform: CI/CD, observability, Kubernetes optimization, environment bootstrapping, and cost optimization. Lead technical decisions, create Claude skills and agentic workflows to boost developer productivity, mentor teammates, write proposals, and deliver cross-functional platform features while ensuring usability, maintainability, and safe production paths.

Produce and manage German short-form social content for Firefox: ideate, script, film, edit, translate global content, manage community across TikTok/Instagram/Threads, and build creator partnerships.

Lead and manage the Thunderbolt engineering team to transition an R&D AI product into a production-ready, enterprise-grade open-source product. Drive execution, hiring, release discipline, code quality, CI/CD, cross-platform delivery, and collaboration with product and design while remaining hands-on with code, architecture, and technical tradeoffs.

Lead Mozilla's long-range strategic finance, oversee direct and venture investments, build 3-5 year financial models, perform TAM/SAM/SOM market sizing, advise executives, manage a small strategic finance team, and evaluate build-vs-partner decisions across subsidiaries.

Lead hands-on engineering execution and people management for Thunderbolt, defining production readiness, release discipline, and engineering practices for an enterprise-ready open-source AI product across desktop, web, and mobile.

Design, build, and operate AI platform services for model training and inference at scale. Own reliability, Kubernetes/GKE deployments, GitOps pipelines, Terraform provisioning, observability, packaging and deployment automation, and incident response while collaborating with product, infrastructure, security, and data teams.

Lead and grow a senior engineering team to transition Thunderbolt from R&D to production-ready AI product. Drive execution, release discipline, code quality, cross-platform delivery, and enterprise-readiness while staying hands-on in code reviews and technical planning. Partner with product, design, and security to balance speed, privacy, and maintainability.

Execute digital marketing and communications across social, email, blog, and other channels. Create and publish content, manage campaign calendars, track performance metrics, support email automation, collect customer feedback, and coordinate with internal teams and vendors to drive brand awareness, user growth, and product adoption.

Execute day-to-day digital marketing across social, blog, email, and other channels. Draft and publish content, manage campaign calendars, track engagement metrics, support email automation, collect customer feedback, coordinate with teams and vendors, and ensure brand-aligned messaging to drive awareness, user growth, and product adoption.

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.

Lead and unify Mozilla's global editorial vision across platforms, curating impactful stories and collaborating across teams to shape narratives about technology's future.

As a Senior Marketing Data Scientist, you will conduct quantitative analyses, manage marketing tests, and provide actionable insights to enhance marketing performance and investment effectiveness.

The Staff Data Scientist will own the analytical strategy for Firefox, driving data-informed decisions through measurement frameworks, experiments, and user growth analysis, while mentoring other data scientists.

The Staff Data Scientist will lead analytical strategies for Firefox, focusing on product growth, measurement frameworks, and mentoring data scientists while guiding data-driven decisions.

Work on Firefox's accessibility engine (Gecko) to improve architecture, stability, performance, and platform integration. Debug multi-process, multi-threaded and OS-specific issues, build tests and prototypes, collaborate with cross-functional teams, influence web accessibility standards, and engage with the open-source community to make web content accessible to all users.

Work on Firefox accessibility by improving the Gecko accessibility engine: write and test C++ code, debug multi-process/multi-threaded and OS-specific issues, collaborate with designers and other browser teams, influence web accessibility standards, and build infrastructure to expose the web platform to assistive technologies.

Lead development and improvement of Firefox's Gecko accessibility engine: write and test C++ code, debug multi-process/multi-threaded and OS-specific issues, collaborate with design and product teams, influence web accessibility standards, build infrastructure exposing the web platform to assistive technologies, and ensure memory and performance targets are met.

Design, fine-tune, evaluate, and deploy LLM-driven, user-facing browser features using RAG, embeddings, prompt engineering, and modern ML tooling. Lead end-to-end model lifecycle, run production experiments, collaborate with product and engineering, and document and review work with an emphasis on privacy, latency, and usability.

Produce and publish short-form social media content (Instagram Reels, Stories, TikTok) to build awareness and community. Collaborate with the Social Media Manager, appear on camera, edit high-performing content, and deliver ~15–20 hours/week as an independent contractor. Remote (USA/Canada).

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