← Back to jobsPosted (ATS) 5/13/2026, 10:53:01 PM Updated (ATS) 5/13/2026, 10:53:01 PM First seen by us 6/28/2026, 9:01:45 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 101 Stagnancy score 59.68 ATS job ID d3f8de08-2e2b-4c3f-be1f-e63ca51f1d93
GhostHigh-confidence zombie posting. HR is probably not actually hiring.
Principal Software Engineer, AI Observability & Evals Platform
LangChain · Engineering · Boston, MA
A posting in this role has sat open 101 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
- Boston, MA
- Posted (ATS)
- May 13, 2026
- Last confirmed open
- Aug 22, 2026
- Open for
- 101 days +
Data provenance
- Source platform
- ashby
- Latest listing found
- https://jobs.ashbyhq.com/langchain/d3f8de08-2e2b-4c3f-be1f-e63ca51f1d93
- Stream ID
- 82bb0e18-e54e-4113-a3a7-81b204605f74