Lead Frontend Engineering Manager – Desktop Browser UI

Mozilla; Toronto; On-site; CAD 149,000 - 220,000; Full time

Benefits offered by this job

Performance-based bonus

Medical, dental, and vision coverage

Retirement contributions with vesting

Wellness days

Country-specific holidays and birthday

Home office stipend

Professional development budget

Well-being stipend

Parental leave

Employee referral bonus

Life/AD&D, disability, EAP

Job summary

Mozilla is seeking a Frontend Engineering Manager to lead a distributed team responsible for Firefox Desktop experiences across Windows, Linux, and macOS. You will drive high-quality UI engineering, set architectural direction, and partner with product, UX, QA and data science to deliver user‑facing features.

You will hire, mentor, and empower engineers while maintaining Mozilla’s commitment to an open, fast, and secure web platform.

Qualifications

• 4+ years leading engineers in a software development environment across distributed teams.
• Experience leading multiple concurrent projects.
• Frontend platform initiatives and architectural improvements.
• Hands-on with web technologies: JavaScript/TypeScript, HTML, CSS.
• Ability to hire, mentor, empower and delegate to distributed team members.

Responsibilities

• Drive initiatives to deliver value to users with high-quality, available, monitored software.
• Balance quick delivery with long-term architectural choices across browser experiences.
• Communicate goals, scope and risks with clear timelines; own delivery.
• Identify, build and iterate on engineering processes for high performance teams.
• Conduct regular 1-1s to discuss technical work and professional development; provide constructive feedback.
• Ensure developers are supported and empowered throughout the lifecycle.
• Create an inclusive environment that engages and challenges team members.
• Collaborate with Product, UX, QA, Operations, and Data Science.

Skills

Leadership

Frontend architecture

Project management

JavaScript/TypeScript

HTML/CSS

Hiring/mentoring distributed teams

Communication

Decision making

Open source experience

Job description

Mozilla is seeking a Frontend Engineering Manager to lead a distributed team responsible for Firefox Desktop experiences across Windows, Linux, and macOS. You will drive high-quality UI engineering, set architectural direction, and partner with product, UX, QA and data science to deliver user‑facing features.

You will hire, mentor, and empower engineers while maintaining Mozilla’s commitment to an open, fast, and secure web platform.