Sync Software Engineer

Summary

Join Mozilla's Sync team as a Senior Software Engineer and contribute to the development and improvement of Firefox's sync and storage features. You will work with a distributed team to enhance the user experience across various devices. Responsibilities include building and maintaining core application services, supporting Sync and Send/Close tab functionality, and collaborating with other engineers. The ideal candidate possesses experience with low-level languages (C++, Golang, Rust), web or native application development (JavaScript, Kotlin, Swift), and a strong understanding of application development at scale. The role requires independent work, clear communication, and a commitment to improving team practices. Mozilla offers a comprehensive benefits package including generous performance-based bonuses, rich medical coverage, retirement contributions, wellness days, and paid parental leave.

Requirements

• You enjoy and have experience using low-level languages such as C++, Golang or Rust to solve tough problems
• You have strong knowledge of web or native application development in JavaScript, Kotlin or Swift and have shipped complex applications at scale
• You are trusted to work independently because you coordinate with your colleagues to understand the business value, operational impact and security implications of your changes
• You clearly express your ideas and increase your impact by sharing what you learn through documentation and demos

Responsibilities

• Provide Firefox users with a seamless experience to access and control their personal and browsing data (history, bookmarks, logins and more) across all of their devices
• Help us evolve the Application-Services library at the core of our sync and storage features, and continue to support its implementation in Firefox on all platforms
• Grow your knowledge of the Firefox browser to support Sync and Send/Close tab functionality across devices
• Partner with engineers on and off the Sync team to deliver features that strengthen the utility and agency of Firefox for our users
• Provide constructive feedback, timely reviews and well-documented ideas to help us improve our team practices and skills

Preferred Qualifications

• You are comfortable working collaboratively with a remote and globally distributed team, often iterating on ideas asynchronously
• You want what you ship to have a positive impact on the user experience, as well as the team's objectives
• You are curious by nature and enjoy taking on complex tasks that are outside your existing knowledge domain – but you’re not afraid to seek help when needed
• You've also worked with multi-functional teams on desktop or mobile applications

Benefits

• Generous performance-based bonus plans to all eligible employees – we share in our success as one team
• Rich medical, dental, and vision coverage
• Generous retirement contributions with 100% immediate vesting (regardless of whether you contribute)
• Quarterly all-company wellness days where everyone takes a pause together
• Country specific holidays plus a day off for your birthday
• One-time home office stipend
• Annual professional development budget
• Quarterly well-being stipend
• Considerable paid parental leave
• Employee referral bonus program
• Other benefits: life/AD&D, disability, EAP, etc. (varies by country)