Mozilla

Full-stack Engineer

• Lead backend development in Node.js and TypeScript, building and maintaining server-side logic within a Next.js full-stack architecture
• Design, implement, and maintain integrations with external data sources such as Have I Been Pwned (HIBP) and other breach intelligence providers, with a focus on data privacy and security
• Build and maintain event-driven systems using Google Cloud Pub/Sub, and own cloud infrastructure on GCP (GKE) and AWS (S3, SES)
• Own and evolve the data layer, including PostgreSQL schema design and query optimization using Knex, and Redis caching strategies
• Work closely with our SRE team to maintain and improve production environments, including monitoring and alerting with OpenTelemetry, Sentry, Prometheus, and Grafana
• Triage and resolve production issues, partnering with SRE and support teams to investigate incidents, address bug reports, and keep the application running reliably
• Periodically rotate into a Base Load Engineer (BLE) role, handling releases, dependency updates, and incoming work requests from customer support and other stakeholders
• Partner with and support the frontend team in their work with React, TypeScript, Next.js, and SCSS, ensuring backend systems, APIs, and data contracts meet their needs
• Partner with cross-functional teams to align on project goals, ensure seamless frontend-backend integration, and contribute to API design and evaluations
• Participate in code reviews to maintain high standards of code quality and system reliability
• Participate in security and privacy reviews, ensuring all data protection measures meet compliance standards

Senior Software Engineer

Recruitment

• Own the end-to-end candidate experience for Staff-level and leadership roles, expertly navigating complex negotiations, equity education, and competitive counter-offers to ensure a high close rate.
• Architect and execute sophisticated sourcing strategies to identify elite, "hard-to-find" talent within niche technical communities (e.g., Rust, browser engine architecture, privacy-preserving AI).
• Serve as a primary talent advisor to VPs and Directors, providing data-driven insights to influence organizational design and multi-quarter hiring plans.
• Lead continuous improvement of the recruiting workflow, utilizing Career Level Guides (CLGs) to ensure consistency in candidate evaluation, leveling, and calibration across all technical business units.
• Drive long-term succession planning by identifying and engaging talent today for the critical roles of tomorrow, ensuring a healthy and diverse pipeline.

Staff Recruiter

Technical Program Manager

• Lead and scale localization initiatives by working closely with volunteer localizers, ensuring sustainability and impact across products.
• Drive localized product releases end-to-end, defining testing and quality strategies, setting priorities for localization bugs, and enabling localization communities to deliver high-quality results at scale.
• Own localization requests from internal partners, coordinating intake, scoping, and execution with LSPs and external platforms to deliver localized content on time and at quality.
• Make and communicate informed trade-offs to optimize time-to-delivery, quality, and resource allocation, using data and experience to guide decisions.
• Partner with engineers and other localization program managers to design localization-ready features, improve tooling and workflows, and reduce risks.
• Collaborate and influence effectively across regions and time zones, building strong relationships with internal clients and teammates to align on priorities and execution.

Senior Localization Technical Program Manager

Data Engineer

• You’ll build and manage our business data pipelines as well as transform Firefox telemetry data into structured high quality datasets Mozillians can rely on
• You’ll partner with data scientists, product, and marketing teams to turn complex datasets into the models and metrics that drive Mozilla’s decisions
• You’ll ensure our datasets stay accurate and performant by using our observability tools to monitor quality and joining a weekly triage rotation to resolve data issues as they arise
• You’ll partner with other data engineers and platform engineers to improve how we work
• You’ll ensure our data governance and privacy policies are implemented and enforced across the tens of terabytes of data flowing through our systems daily

Senior Data Engineer

• Build and manage business data pipelines and transform Firefox telemetry data into structured datasets
• Partner with data scientists, product, and marketing teams to turn complex datasets into models and metrics
• Ensure datasets stay accurate and performant by using observability tools to monitor quality
• Collaborate with other data engineers and platform engineers to improve data workflow
• Ensure data governance and privacy policies are enforced across vast amounts of data

Engineering Manager

• Drive initiatives to deliver value to our users via Messaging and features across Firefox while ensuring the software your team delivers is high quality, monitored, and maintainable.
• Help the team navigate trade-offs and drive alignment in a fast-paced, evolving field; balancing quick delivery with thoughtful, long-term approaches across a portfolio of Messaging 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
• Lead hiring efforts
• 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 to ensure roadmap success.

Engineering Manager, Firefox Desktop

Engineer

• Build working prototypes of developer surfaces, tooling integrations, and applications on top of open source AI infrastructure — with a bias toward shipping something real in days, not weeks
• Work with coding agents and AI-assisted development tools as a core part of your workflow — not as a novelty, but as the way you operate
• Translate concepts, framing documents, and strategy ideas into demonstrations that can anchor a conversation, a community event, or a piece of content
• Collaborate closely with the social media and community team so that what you build is legible and shareable — demos that developers can understand and react to, not just screenshot
• Contribute to Mozilla's open source repositories and work in the open; your code should be something the community can fork, extend, and learn from
• Stay close to the open source AI ecosystem — know what's being built, what's broken, and where a working prototype can surface a real gap or opportunity
• Help evaluate and opine on open source AI tools, stacks, and developer surfaces through the lens of someone who's actually tried to build on them

0to1 Engineer

Social Media Manager

• Help define how Mozilla communicates about open-source AI to technical and builder communities
• Develop a video, content and social strategy to support our 2026 Open-source AI engagement activities
• Make clear recommendations on the right platforms for Mozilla to engage
• Design and iterate on a short-form video strategy tailored to technical audiences
• Collaborate on hooks, scripts, demos, explainers, and conversation-starting formats
• Engage directly with developers, founders, and creators through replies, comments, and conversations
• Support in maintenance of our Substack platform
• Help to grow audience and reach for a new Substack.

Social Media, Content Strategist – Open-Source AI

Artificial Intelligence

• Own the builder pipeline: the developers, tinkerers, and AI engineers who want to build on open AI infrastructure.
• Help design and run a program of in-person events in cities where open AI builders are already gathering — not just the major hubs.
• Identify and cultivate relationships with companies, projects, and organizations who want to build alongside the open AI community — not just sponsor a logo on a banner.
• Be present in the online spaces where open-source AI developers actually live: GitHub, Discord, Reddit, Hacker News, and wherever else the conversation is happening.
• Help design and run hackathons focused on open AI infrastructure — from format to prizes to what happens after the event ends.
• Work closely with the newsletter, social media, and communications team to make sure what's happening in the community shows up in Mozilla's public voice — and vice versa.

Community Manager – Open-Source AI

Product Marketing

• Drive the marketing efforts for our expanding Anonym
• Identify highest opportunity advertising segments (both by vertical and geographical), then build and execute marketing plans to grow awareness with them.
• Craft the Mozilla Ads story and bring it to life in sales collateral and online presence, directly managing external agency partners to deliver exceptional work.
• Bring advances to our ad offering and ad tech stack to life with tight go to market strategies and rollouts.

Senior Product Marketing Manager

User Researcher

• Own strategic quantitative research initiatives from scoping business needs and designing surveys to synthesizing data and communicating actionable recommendations to influence product decisions.
• Utilize a variety of research methods to embed quantitative insights into the end-to-end product development lifecycle (e.g., discovery opportunity sizing, prioritization, concept testing, tracking and measurement after launch).
• Partner cross-functionally at a strategic level with product, design, engineering, data science, and marketing to develop and own a research roadmap, identify high-impact research opportunities, and align insights to business priorities.
• Analyze and translate complex data sources (e.g., surveys, behavioral data, and market intelligence) to build cohesive, evidence-based perspectives that guide product decisions.
• Champion user-centered decision-making by embedding research into product strategy, advocating for user needs, and influencing leaders across functions.
• Elevate the quantitative practice by mentoring peers, refining methods and tools, and scaling approaches that increase the visibility and impact of user insights across Firefox.

Senior Staff Quantitative User Researcher

• Own strategic, end-to-end quantitative research initiatives from scoping business needs and designing surveys to synthesizing data and communicating actionable recommendations to influence product decisions.
• Partner cross-functionally at a strategic level with product, design, engineering, data science, and marketing to develop a research roadmap, identify high-impact research opportunities, and align insights to business priorities.
• Champion user-centered decision-making by embedding quantitative research into product strategy, advocating for user needs, and influencing leaders across functions.
• Analyze and translate complex data sources (e.g., surveys, behavioral data, and market intelligence) to build cohesive, evidence-based perspectives on user experience and audience insights.
• Elevate the quantitative research practice by mentoring peers, refining methods and tools, and scaling approaches that increase the visibility and impact of user insights across Firefox.