Mozilla

AI Engineer

• Design, build, and operate core AI platform components used to train, deploy, and serve machine learning models in production environments.
• Own model serving and inference workflows end-to-end, driving improvements in reliability, scalability, performance, and operational excellence.
• Lead efforts to optimize inference systems for throughput, latency, and cost efficiency across CPU and GPU workloads.
• Design and manage GPU-based inference and training workloads, including performance tuning, capacity planning, and resource utilization optimization.
• Own and improve critical parts of the model lifecycle, including packaging, versioning, testing strategies, validation, and deployment automation.
• Implement and evolve observability practices (metrics, logging, tracing, alerting) to improve visibility and operational resilience of ML services and pipelines.
• Partner closely with product, infrastructure, security, and data teams to design scalable platform capabilities that enable AI-powered features.
• Contribute to technical design discussions, propose architectural improvements, and mentor junior engineers through code reviews and knowledge sharing.
• Participate in and help improve operational processes, including incident response, on-call rotations, and post-incident reviews.

Senior Machine Learning Engineer, AI Platform

DevOps Engineer

• Operate and evolve our EKS-based Kubernetes platform
• Design and develop CI/CD systems supporting websites, services, and Thunderbird desktop releases
• Write and maintain infrastructure in Pulumi and/or Terraform/OpenTofu across multiple AWS accounts
• Operate and evolve our observability stack and partner with engineering teams to incorporate instrumentation and monitoring into service design
• Apply security-conscious infrastructure practices
• Diagnose and debug production incidents and drive root-cause analysis
• Participate in on-call rotation and collaborate with SDEs and fellow SREs
• Contribute to runbooks, architecture documentation, and team processes

Senior Site Reliability Engineer

• Operate and evolve our EKS-based Kubernetes platform, supporting service migrations, platform improvements, and reliability initiatives.
• Design and develop CI/CD systems supporting websites, services, and Thunderbird desktop releases, contributing to pipeline reliability and OIDC-based authentication across GitHub Actions workflows.
• Write and maintain infrastructure in Pulumi and/or Terraform/OpenTofu across multiple AWS accounts.
• Operate and evolve our observability stack (VictoriaMetrics, VictoriaLogs, Grafana, Vector) and partner with engineering teams to incorporate instrumentation and monitoring into service design.
• Apply security-conscious infrastructure practices, including least-privilege IAM, secrets management via AWS Secrets Manager and External Secrets Operator, and network segmentation.
• Diagnose and debug production incidents; drive root-cause analysis and post-incident improvements to prevent recurring problems.
• Participate in on-call rotation and collaborate with SDEs and fellow SREs to ship, maintain, and monitor new builds and support service onboarding.
• Contribute to runbooks, architecture documentation, and team processes.

Marketing

• Execute day-to-day social media activities, including content scheduling, publishing, monitoring, engagement, and reporting.
• Draft and publish blog posts, marketing emails, newsletters, and other digital content aligned with brand voice and campaign objectives.
• Support integrated marketing campaigns, product launches, and promotional activities across multiple channels.
• Monitor social media engagement, coordinating with internal teams when additional context or support is needed.
• Maintain editorial and campaign calendars to ensure timely delivery of marketing activities.
• Track and report on performance metrics, identifying trends and optimization opportunities.
• Support email marketing and automation activities, including list management, campaign setup, and workflow maintenance.
• Assist with customer surveys and feedback collection to inform marketing and product insights.
• Coordinate with internal teams and external vendors to support campaign execution and content development.
• Ensure marketing materials align with brand standards and messaging guidelines.
• Support ad hoc marketing and communications projects as needed.

Marketing Specialist

Frontend Engineer

• Build high quality user interfaces for Firefox with accessibility and usability in mind
• Write code and tests, build prototypes, tackle problems with no clear solution, collaborate with other designers and engineers to make the web a better place
• Learn about a wide variety of problems and solutions across a large, mature codebase
• Work with cross functional teams, building relationships and fostering collaboration to reach shared goals
• Help to level-up the skills of your fellow engineers through code reviews, giving talks, and/or writing documentation
• Promote and maintain high standards of code-quality, focusing on performance, testing, security, usability, accessibility and maintainability
• Work with driven, committed team members to bring the open web to people around the world
• Contribute to improving engineering practices and procedures

Senior Frontend Engineer

Engineering Manager

• Drive initiatives to deliver value to our users ensuring the software your team delivers is high quality, highly available, monitored, and maintainable.
• Help the team navigate trade-offs and drive alignment in a fast-paced field; balancing quick delivery with thoughtful, long-term approaches across a portfolio of user experiences in the browser.
• Communicate your team’s goals, the scope and risks of your projects, and own the delivery of initiatives on clear timelines.
• Identify, build and iterate on engineering processes that support a high performing team.
• Engage regularly 1-1 with your team to discuss both technical work and professional development; provide direct and honest feedback about their individual performances
• Ensure developers are properly supported and empowered throughout the developer lifecycle.
• Create an inclusive environment which engages and challenges your team members.
• Work collaboratively with many teams including Product, UX, QA, Operations, and Data Science.

Front End Engineering Manager

• You’ll be developing and leading a specific French marketing/brand strategy and campaign in 2026.
• Partner with the Director European Integrated Marketing to shape and deliver integrated marketing campaign strategy for France, aligned to audience insights, brand priorities, product initiatives, and cultural moments.
• Deliver integrated 2026 French brand campaign across owned + earned + paid channels, including partnerships, brand moments, and always-on activity.
• Maintain clear project visibility, timelines, and stakeholder updates across this campaign.
• Partner with analytics, insights, and media teams to track + optimize campaign performance and measure impact against business objectives.
• Own campaign and marketing performance tracking and reports to be shared with senior leaders.

Integrated Marketing Consultant

• Partner with the Director European Integrated Marketing to shape and deliver integrated marketing strategies for the UK, aligned to audience insights, brand priorities, product initiatives, and cultural moments.
• Develop strong thought leadership and understanding of the regional landscape, including consumer needs, competitive specs, and emerging macro + cultural trends
• Collaborate cross-functionally with product marketing, media, communications/policy teams, creative, PR, and agency partners to develop impactful campaign platforms and programs.
• Deliver clear, powerful strategic and creative briefs to inspire and guide work across teams.
• Translate global strategies into locally relevant marketing initiatives that resonate with regional audiences and business priorities.
• Deliver integrated marketing campaigns across product launches, partnerships, brand moments, and always-on activity.
• Ensure all creative output aligns with brand standards, tone of voice, and regional market nuances.
• Collaborate with internal and high profile external partners and agencies to deliver coordinated campaigns and market presence
• Strong program manager; accountable for the end-to-end execution. You will maintain clear project visibility, timelines, and stakeholder updates across campaigns.
• Bring a measurement mindset; partnering with cross-functional teams to build measurement plans ensuring work-streams deliver quantifiable outcomes.
• Partner with analytics, insights, and media teams to track + optimize campaign performance and measure impact against business objectives.
• Own campaign and marketing performance tracking and reports to be shared with senior leaders across the business.

Integrated Marketing Manager

Communications

• Drive communications across key EU markets, supporting product launches, campaigns, media relations and storytelling
• Develop and execute media strategies that build awareness and clearly differentiate Mozilla
• Craft clear, compelling messaging and content across press materials, blogs, and executive communications
• Build and manage relationships with media across tech, consumer and business, outlets
• Identify and develop proactive storytelling opportunities tied to product and cultural moments
• Partner with cross functional teams to ensure aligned communications
• Prepare and support senior executives for media and public engagements as needed
• Lead cross-functional communications efforts with strong ownership and follow-through
• Track performance and contribute to ongoing improvement of communications impact
• Support reactive communications, including media inquiries and sensitive issues

Communications Lead

Executive Assistant

• Act as a key point of contact between executives, their teams, and internal/external partners, ensuring timely communication and follow-up.
• Handle sensitive information with the highest degree of discretion.
• Manage a wide range of administrative tasks including calendar management, domestic and international travel coordination, expense reports, etc.
• Support execs across US + EU time zones.
• Coordinate internal and external meetings.
• Plan logistics and events for team and exec offsites and work weeks.
• Build relationships within the organization.

Data Scientist

• Own marketing tests end-to-end, leveraging and contributing to our Python-based measurement workflows.
• Collaborate with senior ICs to address critical data infrastructure needs, support org-wide migrations, and develop new analytical and measurement solutions.
• Develop reporting and monitoring tools that surface business insights and increase visibility into marketing performance and impact.
• Conduct deep-dive analyses to investigate questions related to performance, audiences, monetization, attribution, and data integrity.
• Provide flexible analytical support across the team’s project portfolio, taking high-level direction from senior ICs while independently owning specific components of the solution.

Senior Marketing Data Scientist

Account Executive

• Build the pipeline across DACH by developing new opportunities with large enterprises, regulated organizations, and public-sector-related accounts.
• Own the full sales cycle from prospecting and qualification through discovery, evaluation, business case development, negotiation, and close.
• Turn early customer interest into pilots, support agreements, and long-term enterprise opportunities.
• Partner closely with the Business Development Lead on market priorities, executive engagement, and the region's most important opportunities.
• Work with Solutions Engineering to support technical discovery, customer validation, pilot execution, and rollout planning.
• Build trusted relationships with senior stakeholders across IT, security, architecture, procurement, and compliance, while helping refine the regional sales motion based on market feedback.

Senior Strategic Account Executive, Firefox Enterprise – DACH

• Build the pipeline across DACH by developing new opportunities with large enterprises, regulated organizations, and public-sector-related accounts.
• Own the full sales cycle from prospecting and qualification through discovery, evaluation, business case development, negotiation, and close.
• Turn early customer interest into pilots, support agreements, and long-term enterprise opportunities.
• Partner closely with the Business Development Lead on market priorities, executive engagement, and the region’s most important opportunities.
• Work with Solutions Engineering to support technical discovery, customer validation, pilot execution, and rollout planning.
• Build trusted relationships with senior stakeholders across IT, security, architecture, procurement, and compliance, while helping refine the regional sales motion based on market feedback.

Senior Machine Learning Engineer, AI Platform

Senior Site Reliability Engineer

Senior Site Reliability Engineer

Marketing Specialist

Senior Frontend Engineer

Senior Frontend Engineer

Front End Engineering Manager

Integrated Marketing Consultant

Integrated Marketing Manager

Communications Lead

Executive Assistant

Senior Marketing Data Scientist

Senior Marketing Data Scientist

Senior Strategic Account Executive, Firefox Enterprise – DACH

Senior Strategic Account Executive, DACH