{"id":1115226,"url":"https://alion.io/job/mozilla-corporation-contract-staff-software-engineer-firefox-layout","title":"Contract Staff Software Engineer-FireFox Layout","company":{"id":1740,"name":"Mozilla Corporation","domain":"mozilla.org","url":"https://alion.io/company/mozilla","size_band":"1001-5000","is_staffing_agency":false,"is_intermediary":false,"ats_vendor":"Greenhouse","truth_index":{"grade":"B","score":83,"open_postings":6,"ghost_share":0,"stale_share":0.667,"repost_share":0,"time_to_fill_p50_days":55,"computed_at":"2026-09-23T05:45:00Z"}},"role":"Backend","role_family":"Backend","seniority":"staff","employment_type":"contractor","work_mode":"remote","remote_scope":"stated_countries","hiring_geo_confidence":"structured","locations":[],"countries":[],"hiring_countries":["CA"],"hiring_countries_total":1,"salary":null,"salary_estimate":{"min_usd":129000,"max_usd":241000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":31},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"C++","optional":false},{"name":"ChatGPT","optional":false},{"name":"Claude","optional":false},{"name":"JavaScript","optional":false},{"name":"Linux","optional":false},{"name":"Rust","optional":false},{"name":"Windows","optional":false}],"status":"live","first_seen_at":"2026-09-22T14:00:53Z","employer_posted_date":"2026-09-22","last_verified_at":"2026-09-23T18:22:12Z","board_verified":true,"closed_at":null,"days_open":1,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":1},"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.\nResponsibilities\nOwn day-to-day Layout maintenance: fix bugs and regressions, keep tests green, handle incoming issues.\nDiagnose and fix Layout problems across platforms (Windows, macOS, Linux, Android).\nCarry code review and routine upkeep so the FTE engineers can focus on other mission critical projects. .\nJoin planning and standards / web-compat meetings as needed.\nDefinition of done\nA healthy Layout area, backlog and regressions kept down, with the team’s senior engineers freed to focus on critical Performance and Security issues.\nRequired qualifications\nStrong C++ (JavaScript and/or Rust a plus).\nSolid CSS and page-layout knowledge.\nStrong debugging and optimization in a multithreaded codebase.\nAble to work independently and lead technically in a large, mature codebase.\nPreferred\nPrior experience in web browser architecture and development.\nPrior Web standards experience.\nMobile web development, profiling and debugging skills a plus.\nProven experience in utilization of AI tools (Claude, ChatGPT, etc.) in the investigation, development, debugging, and/or testing of code is a plus.\nHiring Ranges:\nCanada Tier 1 Locations\n$185,045—$217,700 CAD\nCanada Tier 2 Locations\n$131,400—$154,600 CAD","description_format":"text","description_chars":1420,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[{"name":"Canada","iso":"CA","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Artificial Intelligence","Commerce","Data & Analytics"],"lifecycle":[{"event":"open","at":"2026-09-22T15:05:20Z"}],"liveness":{"score":90,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.903,"p_room":1,"age_days":0,"expected_fill_days":55,"reasons":["conf:0","velocity","win:early"],"computed_at":"2026-09-23T05:45:00Z"},"pay":null,"html_url":"https://alion.io/job/mozilla-corporation-contract-staff-software-engineer-firefox-layout","json_url":"https://alion.io/job/mozilla-corporation-contract-staff-software-engineer-firefox-layout.json","meta":{"generated_at":"2026-09-23T18:48:01Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers"}}