{"id":953581,"url":"https://alion.io/job/fieldguide-software-engineer-agents-foundation-agents","title":"Software Engineer, Agents (Foundation Agents)","company":{"id":4121,"name":"Fieldguide","domain":"fieldguide.io","url":"https://alion.io/company/fieldguide","size_band":"501-1000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Ashby","truth_index":{"grade":"A","score":85,"open_postings":15,"ghost_share":0,"stale_share":0.4,"repost_share":0,"time_to_fill_p50_days":64,"computed_at":"2026-11-04T06:34:25Z"}},"role":"Backend","role_family":"Backend","seniority":null,"employment_type":"full_time","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["San Francisco, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":190000,"max":220000,"currency":"USD","period":"year","gross":null,"usd_annual":220000},"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"LLM","optional":false},{"name":"Platform Engineering","optional":true}],"status":"live","first_seen_at":"2026-09-16T01:39:24Z","employer_posted_date":"2026-09-16","last_verified_at":"2026-11-04T13:32:33Z","board_verified":true,"closed_at":null,"days_open":49,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":49},"description":"About Us\nFieldguide is establishing a new state of trust for global commerce and capital markets by automating and streamlining the work of assurance and audit practitioners-specifically in cybersecurity, privacy, and financial audits. We build software for the people who enable trust between businesses.\nWe're based in San Francisco, CA, and backed by Goldman Sachs Alternatives, Bessemer Venture Partners, 8VC, Floodgate, Y Combinator, and more. Over 50 of the top 100 accounting and consulting firms trust Fieldguide to power mission-critical work.\nAbout the Role\nThe Foundation Agents team stewards the long-horizon agents powering the Fieldguide AI platform. We work at the frontier of AI product development: agent knowledge, evaluations, and improving quality and reliability at scale. If you're excited by long-horizon agents that do real-world work, this is the team for you.\nWhat You’ll Own\nBuild and maintain agent knowledge and evaluation infrastructure for Fieldguide's long-horizon agents\n\nBuild our next generation of agents at Fieldguide, solving increasingly complex customer use cases\n\nPerform error analysis on agent behavior and help turn findings into concrete quality improvements\n\nBuild backend systems that support agent execution, evaluation, and monitoring\n\nPartner with senior engineers on the team to execute the platform's reliability and quality roadmap\n\nWho You Are\nYou've built AI products, not just called an LLM API\n\nYou're curious about evals and error analysis. You want to understand why an agent failed, not just that it did\n\nYou're comfortable in the backend, with a bias toward reliable systems\n\nYou're motivated by long-horizon agents that do real work in production\n\nExperience\nMust-have:\nHands-on experience building AI products\n\nWorking knowledge of evals and error analysis\n\nBackend engineering experience\n\nNice-to-have:\nPlatform engineering skills\n\nFrontend experience\n\nDistributed systems experience\n\nWhat Should Excite You\nLong-horizon agents: working on agents that do real, sustained work and not one-shot demos\n\nEvaluation as a craft: Evals and error analysis are core to how this team improves quality\n\nPlatform-level impact: Your work shapes the reliability and quality of every agent built on top of it\n\nFrontier problems: You're working on open problems in agent reliability that don't yet have established playbooks\n\nBenefits\nCompetitive compensation with equity\n\nComprehensive health and wellness benefits\n\nFlexible time off and work schedules\n\nTechnology reimbursements\n\n401(k) plan\n\nTwice-yearly in-person offsites across the U.S.\n\nWellness benefits starting on your first day\n\nOur Values\nFearless - Inspire and break down seemingly impossible walls\n\nFast - Launch fast with excellence; 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