{"id":698726,"url":"https://alion.io/job/plus-software-engineer-simulation","title":"Software Engineer, Simulation","company":{"id":22363,"name":"PlusAI","domain":"plus.ai","url":"https://alion.io/company/plus","size_band":"201-500","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Lever","truth_index":{"grade":"C","score":67,"open_postings":40,"ghost_share":0.55,"stale_share":0,"repost_share":0,"time_to_fill_p50_days":null,"computed_at":"2026-10-17T05:46:00Z"}},"role":"Backend","role_family":"Backend","seniority":"junior","employment_type":"full_time","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Santa Clara, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":120000,"max":150000,"currency":"USD","period":"year","gross":null,"usd_annual":150000},"salary_estimate":null,"experience_years_min":2,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"C++","optional":false},{"name":"Machine Learning","optional":false},{"name":"Motion Planning","optional":false},{"name":"Python","optional":false}],"status":"live","first_seen_at":"2026-05-26T20:47:47Z","employer_posted_date":"2026-05-26","last_verified_at":"2026-10-18T00:17:49Z","board_verified":true,"closed_at":null,"days_open":144,"trust":{"level":"ghost","repost_count":0,"flags":["stale","company_stale"],"days_open":143},"description":"About the role:\nThe Scenario Simulation team is responsible for building a simulation engine that simulates the systems downstream of the perception system. The team works on realistic actor behaviors and other infrastructure tooling for generating diverse scenarios to validate Autonomy. You will have an opportunity to drive immediate user value while architecting advanced, AI-powered frameworks for long-term safety validation.\nResponsibilities:\nDesign scalable ML workflows for generating AV scenarios - ranging from traffic simulations to synthetic scenario creation from a natural language specification.\n\nContribute to tooling for migrating scenario creation using the traditional approach to AI-based scenario understanding and validation\n\nOwn the development and upkeep of the simulation framework, driving its reliability and performance to unblock all technical stakeholders.\n\nCollaborate directly with internal customers and partner teams to provide solutions for their test creation workflows.\n\nHave an opportunity to tackle simulation and autonomy evaluation challenges across various areas of the autonomy system, including motion planning, mapping, Controls.\n\nCreate and extend software for behavior, pathfinding, road networks, spatial queries, collision 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