Work with Us

What is Thunderbird? Software made to make email easier.

Thunderbird is a free and open source email, newsfeed, chat, and calendaring client, that’s easy to set up and customize. One of the core principles of Thunderbird is the use and promotion of open standards - this focus is a rejection of our world of closed platforms and services that can’t communicate with each other. We want our users to have freedom and choice in how they communicate.

We are a fully remote and distributed team. You will work with staff and community members from all over the globe. We are key contributors to open source, allowing you to show your skills to the world and learn from a diverse community.

Open Positions

Thunderbird Build & Release Engineer Full Time / Remote

Thunderbird is looking for a multi-skilled self-starter to work on release engineering. You will be reporting to our infra team lead and working in close cooperation with our current release engineer, other staff, and with community members.

This is a remote, full time position. You are expected to have excellent written communication skills and coordinate your work over email, video conferencing, Matrix, and Bugzilla.

As a release engineer you will be serving the community, empowering them to make their contributions available to millions of people worldwide.

What you’ll get to do:

Work with a geographically-distributed development team.
Improve and maintain the continuous integration systems that developers rely on to accelerate productivity.
Develop the build and release systems used to make final builds available to users.
Collaborate with QA, security, localization, and engineering to ship beta and release builds.
Adapt changes made by the Firefox engineering teams for Thunderbird.

We’re looking for someone with:

Solid scripting knowledge (shell, Python).
Dedication to open source and open standards.
Ability to debug build and compile issues.
Familiarity with using distributed version control systems (primarily Mercurial and Git).
Proven track record of finishing projects.
Devops knowledge for cloud based setups (AWS, Linode etc.)
A mission of making a concrete positive impact on the day to day communication experience for tens of millions of users.

Bonus points for:

A working knowledge of C/C++, Rust, and/or Javascript.
Experience with Taskcluster.
Low level system experience on Linux, Windows, and/or Mac.
Experience with legacy build systems such as make, or modern ones such as Bazel, Buck or Blaze.
Previous open source engagement.

We are an equal opportunity employer and value diversity. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.

Apply Here

How to Apply

If a position sounds like a good fit for you, apply on the Mozilla career portal using the "Apply Here" button below each position. All Thunderbird jobs appear under the Mozilla Foundation and will include Thunderbird in the job title.

A cover letter is essential to your application! Tell us about why you’re passionate about Thunderbird and this position. Also include samples of your work, either directly or as a link. If you contribute to any open source software, or maintain a blog we’d love to hear about it!

The successful applicant will be hired through MZLA Technologies Corporation, a subsidiary of the Mozilla Foundation. By applying to our jobs, you are agreeing to have your application reviewed by Thunderbird contractors and volunteers who are a part of the hiring committee as well as by staff members at the Mozilla Foundation and companies under its umbrella.

Get Involved

Thunderbird is an open source project, which means anyone can contribute ideas, designs, code, and time helping fellow users.

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Thunderbird

Thunderbird is a free email application that’s easy to set up and customize - and it’s loaded with great features!

The Future of Thunderbird

Experience cutting edge features. Provide feedback to help refine and polish what will be in the final release.

Thunderbird Daily

Help us test the newest developments made to Thunderbird every day by using the unstable Daily channel.

WARNING! Daily is an unstable testing and development platform, make sure you back up important data regularly!