Firefox is a major part of the online lives of hundreds of millions of Internet users.  Online experiences are more important than ever, and Firefox engineers make those experiences better.  We work across platforms and form factor, from phones and tablets to laptops and desktops. Our job is to lead by example, to raise the bar on what a browser can be.

We want human-focused engineers to put users in control of their online lives, and to deliver great experiences across devices. You will use a variety of technologies to build and improve Firefox features and front end performance. You will be judged by how much awesome you add to our users' lives.

Possible locations for this position are  Mountain View, San Francisco and Toronto.

Come shape the future of the web.

Required skills:
* Good understanding of web technologies (HTML, CSS and JS)
* Design sense for developing intuitive user interfaces
* Excellent communication skills
* Ability to quickly learn and be effective with a large code base

Nice to have:
* Great foundation in at least one of JS/C/C++/Java
* Experience developing XUL applications a major plus
* Experience developing mobile native and web-based applications
* Participating and contributing to Open Source projects a *huge* plus

Below are the 3 teams you will likely join:

1. Services

Mozilla's Services project (https://services.mozilla.com) exists to give users even more power, flexibility and control over their lives online with products such as Firefox Sync and Firefox Home. We are looking for engineers who can design and implement features for the Services project across various client and server platforms.  This is your opportunity to contribute to the success of Mozilla’s latest Open Source project and share in the satisfaction of building services that will be used by millions.

2. Desktop

Help us build Firefox! The Firefox team is the engineering group responsible for putting an intuitive, performant, and delightful user interface on top of the Gecko rendering engine. Our interns hack directly on user-facing features, working with other engineers as well as designers and user experience professionals to help Firefox serve its users better.

Our interns have built new UI features from scratch (like about:permissions), have built frameworks to support whole classes of tools (like source map support for our developer tools), and have precision-tuned and optimized our existing features (like our phishing/malware databases).

If you want to make the web a better place, if you understand why that experience starts with the pixels on the users screen, and if you have the chops to make it all better: we want to talk to you. For updates on current projects, check out Planet Firefox -- http://planet.firefox.com/

3. Firefox Android

We are looking for students with strong front-end development experience (JS, HTML, CSS and XML) to develop the next generation of web experiences for mobile devices. This is a small enthusiastic team that aims to affect millions of users every day!