mozilla jobs in Montreal

Staff Site Reliability Engineer, Tools & Systems Remote Canada Why Mozilla? The Mozilla Corporation is wholly owned by the non-profit 501(c) Mozilla Foundation. This means we aren't beholden to any shareholders - only to our mission. Along with thousands of volunteer contributors and collaborators all over the world, Mozillians design, build and distribute...

The Mozilla Corporation is wholly owned by the non‑profit 501(c) Mozilla Foundation. This means we aren’t beholden to any shareholders - only to our mission. Along with thousands of volunteer contributors and collaborators all over the world, Mozillians design, build and distribute open-source software that enables people to enjoy the internet on their...

Staff Software Engineer, Web Application ServicesRemote CanadaWhy Thunderbird?Thunderbird is one of the world’s most trusted open-source email applications, empowering more than 20 million people globally. At Thunderbird, we build privacy-respecting communication and productivity tools that help people manage their digital lives while staying in control of...

Mozilla is seeking a hands-on Mobile Product Manager focused on Firefox for iOS, with contributions across mobile platforms including Android. Based in Canada, you’ll work closely with engineers, designers, data science, and TPMs to ship high-impact updates that improve activation and retention.You will monitor app health, perform ASO and growth...

Remote Canada opportunity for a Staff Site Reliability Engineer skilled in software development, production systems, and operational problem-solving. Support Firefox engineering through reliable tools and systems.Mozilla seeks an experienced, versatile software engineer for internal engineering systems, developer tooling, workflow automation, and...

Why Thunderbird?Thunderbird is one of the world’s most trusted open-source email applications, empowering more than 20 million people globally. At Thunderbird, we build privacy-respecting communication and productivity tools that help people manage their digital lives while staying in control of their data.Why Thunderbird?Thunderbird is one of the...

The Firefox Platform Layout/APZ team is a global community of engineers who care deeply about how the Web looks and feels. We are the team responsible for Pan, Scrolling, Zoom, Page Layout, CSS, images, text, printing, and animations in Gecko, the engine behind Firefox. You will be able to design and develop standards-compliant CSS and page layout features...

Mozilla Corporation’s Firefox Desktop Integrations team is seeking a Software Engineer at an early-career level to contribute to cross-platform features such as OS notifications, taskbar integrations, and startup behavior. This role supports Remote Canada and involves collaboration with product, design, and data science to ship measurable improvements.You...

Mozilla-Corporation Contract Staff Software Engineer for Firefox Layout. This remote Canada role focuses on ongoing maintenance and routine engineering in the Layout area (CSS, page layout, APZ, text, images).You will work independently at a tech-lead level to keep the Layout code healthy. Responsibilities include fixing bugs, keeping tests green, diagnosing...

Mozilla Corporation is seeking a seasoned GRC/ISMS specialist to own and advance our information security management systems. You will drive policy, audit readiness, and cross-functional collaboration to ensure ISO 27001 and SOC 2 Type 2 compliance across product and enterprise functions.The role requires hands-on experience with the full compliance program,...

Use HTML, CSS, and JavaScript expertise remotely to diagnose Firefox WebCompat bugs and deliver practical fixes with AI assistance.Mozilla seeks a Contract Staff Software Engineer to reduce Firefox's WebCompat backlog. You will investigate real-world site breakage, validate existing diagnoses, and turn reports into actionable or fixed bugs. The work...

Contract Staff Software Engineer - Performance Graphics (C++,Rust, WebGL)Remote CanadaThe roleYou will take on the ongoing maintenance and engineering work in Firefox’s Graphics area (rendering, compositing, images, canvas, WebGL). You help keep the graphics code healthy.ResponsibilitiesOwn day-to-day Graphics maintenance: bug fixes, regressions, test...

Mozilla is seeking experienced browser engineers to join a small team exploring new applications of browser technology. The work combines deep systems engineering, rapid experimentation, and close collaboration across technical disciplinesWe are looking for a browser engine specialist who enjoys turning difficult systems questions into working experiments....

Elevate web application services as a Staff Software Engineer with Thunderbird. This fully remote role will empower you to shape architecture and influence product direction while working collaboratively with an inclusive team. As a Staff Software Engineer at Thunderbird, you’ll play a pivotal role in evolving services beyond email, including innovative...

Drive innovation as a Full-Stack Product Engineer at Thunderbird, enhancing the Thunderbolt AI client. Contribute to impactful features and ensure seamless customer deployments in this fully remote role. Thunderbird is expanding its team for the Thunderbolt initiative, seeking a Staff Full-Stack Product Engineer to build effective features and integrations....

Contract Staff Software Engineer-FireFox LayoutRemote CanadaYou will take on the ongoing maintenance and routine engineering work in Firefox’s Layout area (CSS, page layout, APZ, text, images). Working independently at a tech-lead level, you keep the Layout code healthy.ResponsibilitiesOwn day-to-day Layout maintenance: fix bugs and regressions, keep tests...

Mozilla Corporation's Firefox Desktop Integrations team is seeking a Software Engineer at an early-career level to contribute to cross-platform features such as OS notifications, taskbar integrations, and startup behavior. This role supports Remote Canada and involves collaboration with product, design, and data science to ship measurable improvements. You...

Mobile Marketing Operations Manager, Firefox Canada Full-Time CAD 63000–93000 / yearly Posted 1 day ago Location Canada Job type Full-Time Salary CAD 63000–93000 / yearly Posted 14 Oct 2026 (1 day ago) Region Canada Category Marketing & Sales Source Jobicy Work mode Remote Why Mozilla? The Mozilla Corporation is wholly owned by the non-profit...

Mobile Marketing Operations Manager, FirefoxCanada Full-Time CAD 63000–93000 / yearly Posted 1 day agoLocation CanadaJob type Full-TimeSalary CAD 63000–93000 / yearlyPosted 14 Oct 2026 (1 day ago)Region CanadaCategory Marketing & SalesSource JobicyWork mode RemoteWhy Mozilla?The Mozilla Corporation is wholly owned by the non-profit 501(c) Mozilla...