{"id":2008937,"url":"https://alion.io/job/waymo-principal-software-engineer-post-training","title":"Principal Software Engineer (Post Training)","company":{"id":98,"name":"Waymo","domain":"waymo.com","url":"https://alion.io/company/waymo","size_band":"5000+","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Welcome to the Jungle","truth_index":{"grade":"B","score":75,"open_postings":35,"ghost_share":0,"stale_share":1,"repost_share":0,"time_to_fill_p50_days":33,"computed_at":"2026-10-12T06:55:09Z"}},"role":"Backend","role_family":"Backend","seniority":"lead","employment_type":"full_time","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Mountain View, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":349000,"max":431000,"currency":"USD","period":"year","gross":null,"usd_annual":431000},"salary_estimate":null,"experience_years_min":10,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Machine Learning","optional":false},{"name":"Post-training","optional":false}],"status":"live","first_seen_at":"2026-09-04T00:17:50Z","employer_posted_date":"2026-10-07","last_verified_at":"2026-10-12T13:52:58Z","board_verified":true,"closed_at":null,"days_open":38,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":38},"description":"Join Waymo as a Principal Software Engineer, where you will play a key role in advancing the technology behind the Waymo Driver. 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This role follows a hybrid work schedule and offers a comprehensive benefits package.\nMissions\nAdvancing the technology to power the Waymo Driver and help it scale to dramatically more miles and locations across the world.\nDeveloping and leading a strategy for a next-generation post-training system on top of existing large-scale models.\nParticipating in the leadership community advancing the ML stack across Waymo and partnering with teams to develop effective, scalable post-training strategies.\nProfil recherché\n - An ability to balance influencing day-to-day leadership on the ground with developing and influencing engineering strategy- MS in computer science with an emphasis in machine learning or equivalent degree (PhD preferred)\n- Experience building metrics, data, and flywheels for post-training applications\n- 10+ years of leadership experience in a large-scale machine learned production system\n- Experience leading a post-training system that is used in production with 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