Went through the Jane Street interview timeline end to end this spring. Posting because when I was going through it I kept searching 'how long from screen to offer' and couldn't find anything current. So here's a real data point.
My full timeline: Day 0: recruiter reached out via LinkedIn Day 4: intro call with recruiter (30 min) Day 14: first technical screen (1hr, live coding, OCaml-adjacent problem framing) Day 21: second technical screen (1hr, more complex, needed to explain tradeoffs) Day 35: onsite scheduled (virtual; four back-to-back rounds across one day) Day 37: onsite completed Day 44: recruiter follow-up call (no decision yet) Day 51: verbal offer extended Day 63: written offer received
Total: 63 days from first recruiter contact to written offer. About 9 weeks.
What's slow and why: the onsite to offer gap (2+ weeks) is normal for JS. They do a deliberate debrief process. The recruiter was upfront about this. If you're in an active competing offer situation you can ask them to expedite and they'll often do it, but they won't rush the internal process arbitrarily.
What's fast: the scheduling itself was smooth. They moved quickly to schedule each round and were responsive.
If you're timing other offers: I'd budget 8-10 weeks for the full loop, potentially 12 if there are holidays or scheduling complications. They won't sacrifice the quality of the process for speed, but they're not deliberately slow either.
Ghosting risk: low in my experience. They gave status updates proactively and the recruiter was reachable.