Contract Staff Software Engineer (FireFox Layout)

Mozilla; Ottawa; On-site; CAD 120,000 - 160,000; Full time

Benefits offered by this job

Health and dental plan

Mental health support

Paid parental leave

Wellness stipend

Education budget

Remote internet reimbursement

Ergonomic office budget

Job summary

Mozilla is seeking a senior Layout engineer to own ongoing maintenance of the Firefox Layout stack (CSS, page layout, APZ, text, images). You will work independently at a tech-lead level to keep the Layout code healthy, fix bugs, and maintain tests across Windows, macOS, Linux, and Android.

You will participate in planning and standards discussions, perform code reviews, and help ensure robust web layout performance in a mature codebase.

Qualifications

• Strong C++ skills with multithreaded code experience.
• Solid CSS and page-layout knowledge.
• Prior browser architecture experience.

Responsibilities

• Maintain the Layout area: fix bugs and regressions, keep tests green.
• Diagnose and fix Layout problems across Windows, macOS, Linux, Android.
• Carry code reviews and upkeep so other engineers can focus on mission-critical work.
• Join planning and standards/web-compat meetings as needed.

Skills

C++

CSS

Page layout

Web browser architecture

AI tools usage

Tools

JavaScript

Rust

Multithreading debugging

Job description

• You will take on the ongoing maintenance and routine engineering work in Firefox’s Layout area (CSS, page layout, APZ, text, images)
• Working independently at a tech-lead level, you keep the Layout code healthy
• Own day-to-day Layout maintenance: fix bugs and regressions, keep tests green, handle incoming issues
• Diagnose and fix Layout problems across platforms (Windows, macOS, Linux, Android)
• Carry code review and routine upkeep so the FTE engineers can focus on other mission critical projects.
• Join planning and standards / web-compat meetings as needed

Benefits

• Health and wellness: Mozilla covers medical, dental and vision plan premiums at 100% for U.S. and Canadian employees. Our offerings give you the options you need to manage your health — and your family’s — the way you want.
• Mental health: Mental health is as important as our physical health. That’s why Mozilla’s health benefits include therapy and coaching sessions to make sure our people have access to the care they need.
• Time away: With all of life’s demands, time away from work to disconnect and recharge is essential. In addition to country-specific holidays (12 in the U.S. and Canada), vacation and sick time start accruing right away (specifics vary by country). Everyone also takes a pause together on quarterly all-company wellness days, plus you get to celebrate the most personal holiday of all: your birthday.
• Parental leave: While Mozilla’s parental leave policies vary globally, our U.S. and Canadian-based employees can look forward to 26 weeks of paid leave for childbearing parents and 12 weeks of paid leave for non-childbearing parents.
• Financial: Mozilla is a private company, so our compensation isn’t tied to stock options or equity plans. Instead, we offer generous, performance-based bonus plans to all regular employees to underscore that we share in our success as one team. As for retirement savings for US and Canadian employees, Mozilla contributes a percentage of your eligible base salary each year to the 401(k) Plan/RRSP (regardless of whether you contribute or not), with 100% vesting.
• Learning and development: We’re big believers in learning by doing, and we also want to invest in your education and development beyond your role. Every employee is eligible for an annual professional development budget. Mozillians can put it toward technical or management training, certifications, conferences and more.
• Help when you need it: Life is full of surprises; that’s why it’s important to be prepared. Mozilla provides Life/AD&D and Short and Long Term Disability insurance (offerings may vary by locale) to ensure that you and your family will have a safety net in place should you ever need it.
• Plus a bit more: A few other benefits include a quarterly wellbeing stipend (to use on those things just for you), an employee referral bonus, internet reimbursement if you’re remote, and a budget for office essentials to make working remotely ergonomically comfortable.

A healthy Layout area, backlog and regressions kept down, with the team’s senior engineers freed to focus on critical Performance and Security issuesStrong debugging and optimization in a multithreaded codebaseStrong C++ (JavaScript and/or Rust a plus)Able to work independently and lead technically in a large, mature codebaseSolid CSS and page-layout knowledgePrior experience in web browser architecture and developmentPrior Web standards experienceMobile web development, profiling and debugging skills a plusProven experience in utilization of AI tools (Claude, ChatGPT, etc.) in the investigation, development, debugging, and/or testing of code is a plus