Release Engineer

TL;DR

Release Engineer (Thunderbird): Building and maintaining automation systems for Thunderbird's software releases across desktop and mobile platforms with an accent on build reliability, reproducibility, and security. Focus on adapting build system changes, troubleshooting complex build issues, and ensuring high-quality delivery.

Location: Applicants must reside in and have permanent work authorization for the country location(s) specified in the posting (US or Canada).

Salary: $103,000 - $122,000 USD (US), $93,000 - $106,000 CAD (Canada)

Company

MZLA Technologies Corporation (MZLA) is a wholly owned, for-profit subsidiary of the Mozilla Foundation and home to Thunderbird, an open-source email and productivity platform.

What you will do

• Develop and maintain workflows for automating software builds and releases, including managing dependencies and toolchains.
• Write and enhance CI / CD workflows, packaging, and installation scripts for Thunderbird on Linux, Windows, macOS, Android, and iOS platforms.
• Adapt changes to build scripts made by the Firefox engineering teams to Thunderbird.
• Identify, troubleshoot, and resolve complex build, test, and dependency issues in collaboration with developers and contributors.
• Participate in process improvement initiatives, contribute to the evaluation and design of alternative solutions, and support ad hoc projects as required.
• Engage with the open-source community to gather feedback, address concerns, and foster collaboration.

Requirements

• 3+ years of professional experience, including build and release engineering for applications on Linux, Windows, macOS, Android, and iOS platforms.
• Proficiency in C, C++, Rust, Kotlin, and Java, including knowledge of related toolchains and dependencies.
• Strong understanding of Python and shell scripting for automation, version control, and CI/CD pipelines.
• Experience building, compiling, and release engineering native desktop or mobile applications, with demonstrated ability to debug complex build and compile issues.
• Working knowledge of containerization technologies such as Docker and Kubernetes, distributed version control systems (Mercurial and Git), and DevOps principles and cloud-based infrastructure such as AWS or GCP.
• Excellent English written and verbal communication skills, with the ability to clearly and concisely engage with an international, geographically distributed team.

Nice to have

• Familiarity with JavaScript and CSS for front-end support and integration.
• Experience with Taskcluster or similar CI systems.
• Low-level system experience with Linux, Windows, and/or macOS.
• Familiarity with legacy build systems (e.g., Make) and modern systems (e.g., Bazel, Buck, Blaze).
• Previous experience contributing to open-source projects or engaging with open-source communities.

Culture & Benefits

• Fully remote work & schedule flexibility
• Comprehensive benefits package designed to support your whole self
• 24 days PTO per year (prorated)
• Monthly Remote Work Stipend
• Annual Professional Development Stipend
• Access to Udemy Learning Platform

Hiring process

• Apply directly through our career page
• Every cover letter and screening question are carefully reviewed, so take the time to answer each fully.