Roblox loop, rejected after the SD round

Roblox loop, rejected after the SD round

Went through the whole Roblox loop, 5 rounds total, wanted to write up what I got in case it helps someone else prep.

Phone screen was 45 minutes, one coding problem, Highest Earning Experience Tracker, tracked cumulative earnings for named experiences with update and query ops, heap flavored once you get past the naming. Got through both parts with a few minutes left, interviewer asked about the alphabetical tie break as a follow-up.

HM screen after that was the standard walk through a past project, most challenging part, who you worked with. Wasn't anything unusual there.

Onsite was 3 rounds. Coding was most frequent call stack, return the most called path from stack samples, with a follow-up on tie breaking by deeper stack and per-thread aggregation. SD was matchmaking service design for one of their games, most of the hour went into skill-based matching at scale and what happens when the queue gets thin. Last round combined project presentation with HM/BQ, walked through a system I built at my last job and got some pushback on a scaling decision I made, then a few standard behavioral questions after.

Didn't get specific feedback beyond it not being a strong enough signal on the SD round, rejected about two days after onsite. Coding rounds felt solid tbh, so that one stung a bit, but SD does seem to be where they dig in the most.

Roblox priyashah94 1d

the heap tracker question, was that new or is it something people usually get for phone screen there?

Roblox danielkwon87 OP 1d

wasn't in the company skill notes I saw before mine, felt pretty fresh honestly. wish I'd known the tie breaking twist though

Roblox noahdavis02 1d

matchmaking design round is brutal, they really want you to go deep on the queue starvation edge case

Roblox graceh21 22h

sorry about the SD result, that round eats a lot of people from what I've seen posted here

Roblox vikramreddy95 20h

curious if the HM/BQ felt checklist like for you too, seems common with roblox

Roblox danielkwon87 OP 18h

yeah kind of, felt like boxes being checked more than a real conversation