About the job
MZLA Technologies Corporation (MZLA) is a for-profit subsidiary of the Mozilla Foundation and the driving force behind Thunderbird, our leading open-source email and productivity platform that empowers over 20 million users globally. While part of the Mozilla family, MZLA operates as an independent entity, fostering innovation and a unique organizational culture.
Our commitment to open-source development means everything we create is built transparently with the collaboration of a global community of contributors. This approach not only influences our products but also underpins our collaborative and inclusive work environment, all centered around the principle that privacy and productivity can coexist. We believe in providing robust digital tools without compromising user data control.
With a dynamic team of over 50 professionals across seven countries, we are transforming Thunderbird from a standalone application into a comprehensive suite of privacy-conscious productivity tools. Our innovative revenue model blends community support through donations with subscription offerings for cloud-based services, enabling us to remain independent and committed to our core values.
To get more insights, visit www.thunderbird.net
The Opportunity:
As a Release Engineer, you will be instrumental in developing, managing, and enhancing the automation systems that facilitate Thunderbird’s software releases across various platforms, including desktop and mobile (Linux, Windows, macOS, Android, and iOS).
You will be part of the Release Operations team, dedicated to ensuring our builds are dependable, reproducible, secure, and timely delivered to millions of users worldwide.

