{"id":698608,"url":"https://alion.io/job/plus-senior-simulation-software-engineer","title":"Senior Simulation Software Engineer","company":{"id":22363,"name":"Plus","domain":"plus.ai","url":"https://alion.io/company/plus","size_band":"201-500","is_staffing_agency":false,"is_intermediary":false,"ats_vendor":"Lever","truth_index":{"grade":"B","score":70,"open_postings":40,"ghost_share":0.5,"stale_share":0,"repost_share":0,"time_to_fill_p50_days":null,"computed_at":"2026-09-23T05:45:00Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"full_time","work_mode":"hybrid","remote_scope":null,"hiring_geo_confidence":"structured","locations":["Santa Clara, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":130000,"max":200000,"currency":"USD","period":"year","gross":null,"usd_annual":200000},"salary_estimate":null,"experience_years_min":3,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Agentic Workflows","optional":false},{"name":"C++","optional":false},{"name":"LLM","optional":false},{"name":"Python","optional":false},{"name":"Sim-to-Real","optional":false},{"name":"LangChain","optional":true},{"name":"LangGraph","optional":true}],"status":"live","first_seen_at":"2026-08-10T19:50:16Z","employer_posted_date":"2026-08-10","last_verified_at":"2026-09-23T14:35:36Z","board_verified":true,"closed_at":null,"days_open":43,"trust":{"level":"ok","repost_count":0,"flags":["company_stale"],"days_open":43},"description":"We are looking for a Senior Simulation Software Engineer to build and scale the simulation infrastructure that powers our autonomous vehicle development. You will architect simulation pipelines, leverage AI agentic workflows to analyze simulation results, and drive improvements in simulation fidelity to validate autonomy systems and enable critical program milestones. This role offers the opportunity to drive immediate user value while building advanced, AI-powered frameworks for long-term safety validation.\nResponsibilities\nDesign and build AI agentic workflows that automatically analyze simulation results, identify failures, and surface root causes across large-scale test runs, translating them into actionable insights for engineering teams.\n\nArchitect and build scalable simulation pipelines, including the metric evaluation framework, and conduct in-depth analysis of road test and simulation data to identify trends, anomalies, and key performance indicators that enhance model accuracy and validate autonomy performance.\n\nIdentify, quantify, and reduce sources of divergence between simulation and real-world behavior, leveraging AI and data-driven techniques to increase simulation fidelity across actor behaviors, sensor models, and system dynamics.\n\nMonitor and improve the performance, scalability, testing, and reliability of the platform.\n\nCollaborate with cross-disciplinary teams-including simulation, onboard, systems engineering, and data science-to reproduce and resolve issues encountered during real-world road tests.\n\nWork with other engineers to design the long-term architecture of the system.\n\nEnsure that technical work meets customer requirements, regulatory standards, and company quality policies, in accordance with the company's Quality Management System (QMS), and contribute to continuous improvement efforts.\n\nRequired Skills:\nMS with 3+ years of relevant experience, or a PhD new grad, in mechanical, electrical, aerospace engineering, physics, computer science, or a related field.\n\nExperience building LLM-powered or agentic workflows for data analysis, evaluation, or automation.\n\nExperience quantifying or improving simulation fidelity / closing the sim-to-real gap (e.g., sensor modeling, actor behavior modeling, scenario generation).\n\nProficient in Python or C++, with experience building scalable data processing systems or evaluation frameworks.\n\nAbility to solve open-ended technical challenges.\n\nExcellent communication skills and the ability to collaborate effectively in a team setting.\n\nPreferred Skills:\nExperience with autonomous vehicle or robotics simulation and related concepts.\n\nFamiliarity with LLM agent frameworks (e.g., LangChain, LangGraph, or similar) and prompt/tool-orchestration patterns.\n\nExperience developing metrics, user-facing APIs, or interfaces between system components.","description_format":"text","description_chars":2852,"description_truncated":false,"requirements":{"experience_years_min":3,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"phd","optional":false},"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[{"name":"United States","iso":"US","kind":"country"},{"name":"Canada","iso":"CA","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Autonomous Driving","Road Transport"],"lifecycle":[{"event":"open","at":"2026-09-11T02:26:26Z"}],"liveness":{"score":45,"band":"ok","label":"Likely open","p_open":1,"p_active":0.595,"p_room":0.75,"age_days":43,"expected_fill_days":46,"reasons":["conf:1","stale_co","velocity","win:late"],"computed_at":"2026-09-23T05:45:00Z"},"pay":{"stated_usd_annual":200000,"is_top_pay":true},"html_url":"https://alion.io/job/plus-senior-simulation-software-engineer","json_url":"https://alion.io/job/plus-senior-simulation-software-engineer.json","meta":{"generated_at":"2026-09-23T15:56:05Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers"}}