Thunderbolt is an open-source, cross-platform AI product initiative from the team behind Thunderbird

It is being built around a explicit principle: people and organizations should be able to use AI while staying in control of their data, infrastructure, model choices, and long-term options

Thunderbolt is designed to support flexible deployment models, integrations with AI tools and workflows, and use cases across desktop, web, and mobile

We’re looking for a Staff Product Engineer to help build Thunderbolt as it moves from early product development into enterprise use cases

This role sits at the intersection of full-stack product engineering, AI-enabled product development, enterprise workflows, technical execution, product judgment, and post-launch iteration

You’ll work across the stack to turn product direction, user needs, partner feedback, and enterprise requirements into complete product features for AI-powered chat, search, research, workflow automation, administration, integrations, and enterprise workflows

This is not a role focused only on implementing tickets

You’ll own product work from concept through launch, adoption, and iteration, helping the team understand whether features are usable, reliable, being used, and creating value

You should be comfortable operating independently in ambiguity, working across front-end, back-end, APIs, integrations, and infrastructure-adjacent areas, and making thoughtful tradeoffs between speed, usability, maintainability, reliability, and enterprise needs

Strong candidates will be able to turn ambiguous product ideas and technical direction into shipped product experiences, reusable product and engineering patterns, and practical improvements that help Thunderbolt scale as both an open-source product and an enterprise-ready platform

Own the implementation of Thunderbolt product features from concept through launch, adoption, and iteration

Translate product vision, user needs, partner feedback, and enterprise requirements into practical technical plans and shipped product experiences

Work across the stack to build, integrate, test, and ship complete product features

Build features for AI-powered chat, search, research, workflow automation, administration, integrations, and enterprise workflows

Partner closely with product, design, engineering, enterprise-facing teams, and open-source contributors to clarify requirements and deliver high-quality outcomes

Collaborate with senior technical leadership to turn product-shaping technical direction into executable product work

Use AI-assisted development tools thoughtfully to accelerate implementation while maintaining strong judgment around quality, security, maintainability, and reliability

Make thoughtful technical and product tradeoffs in ambiguous situations, balancing speed, usability, maintainability, reliability, and enterprise needs

Follow through after launch by reviewing usage, qualitative feedback, support signals, quality issues, and adoption patterns

Instrument features or collaborate on measurement approaches that help the team understand adoption, reliability, and product value

Identify product gaps, technical risks, edge cases, and opportunities to improve the user experience

Write clear, maintainable, well-tested code across front-end, back-end, APIs, integrations, and infrastructure-adjacent areas





Help establish reusable product and engineering patterns that allow future features to be built more efficiently

Contribute to a product engineering culture grounded in ownership, quality, experimentation, user value, and practical execution

In this role, success means helping Thunderbolt turn ambiguous product ideas, technical direction, user needs, and enterprise requirements into complete product capabilities that are usable, reliable, maintainable, and valuable

You will help the team move quickly while also building the patterns, feedback loops, and product quality needed for Thunderbolt to scale as both an open-source product and an enterprise-ready platform

Over time, successful work in this role will lead to:

Shipped features that solve real user, partner, and enterprise needs

Stronger full-stack product capabilities across AI-powered chat, search, research, workflow automation, administration, integrations, and enterprise workflows

Clearer technical plans that translate product direction and enterprise requirements into executable work

Better post-launch understanding of whether features are being used, working as intended, and creating value

More reusable product and engineering patterns that help future features move faster

Fewer product gaps, edge cases, and technical risks discovered late in development

Stronger alignment between product, design, engineering, enterprise-facing teams, and open-source contributors

Greater confidence that Thunderbolt features are secure, maintainable, supportable, and ready for enterprise use

Benefits

Health and wellness: Mozilla covers medical, dental and vision plan premiums at 100% for U.S. and Canadian employees. Our offerings give you the options you need to manage your health — and your family’s — the way you want.

Mental health: Mental health is as important as our physical health. That’s why Mozilla’s health benefits include therapy and coaching sessions to make sure our people have access to the care they need.

Time away: With all of life’s demands, time away from work to disconnect and recharge is essential. In addition to country-specific holidays (12 in the U.S. and Canada), vacation and sick time start accruing right away (specifics vary by country). Everyone also takes a pause together on quarterly all-company wellness days, plus you get to celebrate the most personal holiday of all: your birthday.

Parental leave: While Mozilla’s parental leave policies vary globally, our U.S. and Canadian-based employees can look forward to 26 weeks of paid leave for childbearing parents and 12 weeks of paid leave for non-childbearing parents.

Financial: Mozilla is a private company, so our compensation isn’t tied to stock options or equity plans. Instead, we offer generous, performance-based bonus plans to all regular employees to underscore that we share in our success as one team. As for retirement savings for US and Canadian employees, Mozilla contributes a percentage of your eligible base salary each year to the 401(k) Plan/RRSP (regardless of whether you contribute or not), with 100% vesting.

Learning and development:



We’re big believers in learning by doing, and we also want to invest in your education and development beyond your role. Every employee is eligible for an annual professional development budget. Mozillians can put it toward technical or management training, certifications, conferences and more.

Help when you need it: Life is full of surprises; that’s why it’s important to be prepared. Mozilla provides Life/AD&D; and Short and Long Term Disability insurance (offerings may vary by locale) to ensure that you and your family will have a safety net in place should you ever need it.

Plus a bit more: A few other benefits include a quarterly wellbeing stipend (to use on those things just for you), an employee referral bonus, internet reimbursement if you’re remote, and a budget for office essentials to make working remotely ergonomically comfortable.

Experience working with open-source enterprise products, developer tools, infrastructure products, platform products, or technically complex enterprise softwareStrong understanding of software quality, testing, maintainability, security, performance, reliability, and implementation tradeoffsStrong full-stack engineering skills, with the ability to work across user interfaces, APIs, services, integrations, data flows, and infrastructure-adjacent areasComfort operating independently in a fast-changing product environment where product direction, technical architecture, and enterprise requirements are still being definedStrong collaboration and communication skills across engineering, product, design, open-source, and customer- or partner-facing stakeholders10+ years of professional software engineering experience, including significant experience building and shipping production applications with Staff-level scope, leadership, and impactDemonstrated experience owning complex product features from technical planning through implementation, launch, evaluation, and iterationAwareness of enterprise software needs, including privacy, security, administration, access control, compliance, deployment flexibility, supportability, and responsible AI considerationsExperience building AI-enabled products or features, with practical familiarity in LLMs, RAG, agents, model/provider abstraction, data connectors, retrieval systems, or AI application architectureStrong product judgment, including the ability to translate product direction, user feedback, partner input, customer needs, and product signals into practical technical plans and follow-up iterationsPractical experience evaluating and using multiple AI tools, models, frameworks, or development harnesses, with the ability to explain tradeoffs, limitations, and preferred tooling choicesExperience with instrumentation, observability, experimentation, or other approaches to understanding product adoption, reliability, and valueExperience contributing to reusable product patterns, component libraries, technical frameworks, or shared engineering practicesExperience working with enterprise customers, public sector organizations, systems integrators, technical partners, or customer-facing engineering teamsFamiliarity with regulatory or compliance considerations affecting AI and enterprise software, such as the EU AI Act, Cyber Resilience Act, GDPR, HIPAA, SOC 2, or similar frameworksExperience with self-hosted, hybrid, customer-controlled, or regulated deployment environments

#J-18808-Ljbffr

📌 Staff Product Engineer (Enterprise AI) (Quebec City)
🏢 Mozilla
📍 Quebec City