← Back to jobsPosted (ATS) 8/15/2025, 6:44:16 PM Updated (ATS) 8/15/2025, 6:44:16 PM First seen by us 6/28/2026, 9:01:46 AM Last re-seen 8/22/2026, 10:30:15 PM Distinct job IDs 1 Open in parallel 1 Work locations 1 Cumulative days active 372 Stagnancy score 100 ATS job ID ddf92275-1cc3-49c0-9f25-e8ded43b07f6
GhostHigh-confidence zombie posting. HR is probably not actually hiring.
FullStack Engineer, AI Observability & Evals Platform (LangSmith)
LangChain · Engineering · San Francisco, CA
A posting in this role has sat open 372 days — well past the 90-day mark where an opening reads as a resume black hole rather than an active search.
Rotation timeline
Every ATS job ID we've matched to this same normalized title, oldest first. "Posted" is the date the ATS reports; "last confirmed open" is the last time we saw it live.
- Location
- San Francisco, CA
- Posted (ATS)
- Aug 15, 2025
- Last confirmed open
- Aug 22, 2026
- Open for
- 372 days +
Data provenance
- Source platform
- ashby
- Latest listing found
- https://jobs.ashbyhq.com/langchain/ddf92275-1cc3-49c0-9f25-e8ded43b07f6
- Stream ID
- b701ac1b-6f11-41f8-8865-bdd25806cb74