| Find Windows Containing a Target NewMachine Learning EngineerCoding | Medium | May 7, 2026 |
| Design a Game Recommendation System NewMachine Learning EngineerSystem Design | Medium | May 7, 2026 |
| Design Multi-Dimensional Request Rate Limiting NewSoftware EngineerSystem Design | Easy | May 4, 2026 |
| Design a Scalable Likes System Software EngineerSystem Design | Medium | Apr 1, 2026 |
| Implement Sliding-Window Rate Limiter Software EngineerCoding | Medium | Mar 11, 2026 |
| Find most frequent call path in logs Software EngineerCoding | Medium | Feb 11, 2026 |
| Design favorites and social game recommendations Software EngineerSystem Design | Medium | Feb 11, 2026 |
| Design a rate limiter Software EngineerSystem Design | Medium | Jan 22, 2026 |
| How to estimate feature impact on usage time Data ScientistProduct Sense | Easy | Jan 17, 2026 |
| Design a game recommendation modeling approach Software EngineerSystem Design | Easy | Jan 14, 2026 |
| Write SQL for influence score and follower growth Data Scientist | Easy | Dec 11, 2025 |
| Find maximum follow depth using recursion Data ScientistCoding | Easy | Dec 11, 2025 |
| Implement recent-requests counter Machine Learning EngineerCoding | Easy | Dec 8, 2025 |
| Extend counter to per-client rate limiting Machine Learning EngineerCoding | Easy | Dec 8, 2025 |
| Implement four DS coding tasks Data ScientistCoding | Easy | Oct 18, 2025 |
| Rank queries by prefix, frequency, and time Software EngineerCoding | Hard | Oct 14, 2025 |
| Defend a metric choice under scrutiny Data ScientistBehavioral | Medium | Oct 13, 2025 |
| Explain an ML project end-to-end with tradeoffs Data Scientist | Medium | Oct 13, 2025 |
| Optimize bread-factory pipeline for max profit Data ScientistCoding | Medium | Oct 13, 2025 |
| Match requests and accepts into friendships in SQL Data Scientist | Medium | Oct 13, 2025 |
| Determine if players prefer local creators without experiments Data ScientistProduct Sense | Medium | Oct 13, 2025 |
| Choose best/worst actions under OA pressure Data ScientistBehavioral | Medium | Oct 13, 2025 |
| Optimize assembly-line scheduling with changeovers Data ScientistCoding | Medium | Oct 13, 2025 |
| Design leakage-free predictive maintenance pipeline Data Scientist | Hard | Oct 13, 2025 |
| Clean and aggregate factory event data in Pandas Data Scientist | Medium | Oct 13, 2025 |
| Demonstrate fit with quantified stories and motivations Data ScientistBehavioral | Hard | Oct 13, 2025 |
| Implement deduped CTR/RPM aggregator over event stream Data Scientist | Medium | Oct 13, 2025 |
| Compute CTR, RPM, and daily RPM variability in SQL Data Scientist | Medium | Oct 13, 2025 |
| Design and analyze an ads ranking experiment Data ScientistProduct Sense | Hard | Oct 13, 2025 |
| Describe resolving revenue–UX metric conflict Data ScientistBehavioral | Hard | Oct 13, 2025 |
| Implement streaming CTR with deduplication Data ScientistCoding | Medium | Oct 13, 2025 |
| Derive variance and CTR confidence intervals Data Scientist | Medium | Oct 13, 2025 |
| Write SQL for ads metrics and variability Data Scientist | Medium | Oct 13, 2025 |
| Design ad revenue A/B with guardrails Data ScientistProduct Sense | Hard | Oct 13, 2025 |
| Describe leading an ambiguous ads project Data ScientistBehavioral | Medium | Oct 13, 2025 |
| Implement robust one/two-sided p-value function Data Scientist | Hard | Oct 13, 2025 |
| Design experiment for homepage tab replacement Data ScientistProduct Sense | Hard | Oct 13, 2025 |
| Compute ARPDAU/ARPPU by country Data Scientist | Medium | Oct 13, 2025 |
| Compute GSP vs VCG payments with reserves Data Scientist | Medium | Oct 13, 2025 |
| Write SQL to flag suspect payments and chargebacks Data Scientist | Medium | Oct 13, 2025 |
| Evaluate friend-interaction feature with network interference Data ScientistProduct Sense | Hard | Oct 13, 2025 |
| Design real-time payments fraud model under constraints Data Scientist | Hard | Oct 13, 2025 |
| Rank features using logistic regression coefficients Data Scientist | Easy | Oct 3, 2025 |
| Compute diff-in-diff and pretrend flag Data ScientistProduct Sense | Easy | Oct 3, 2025 |
| Compute A/B test sample size and Bayes posterior Data Scientist | Easy | Oct 3, 2025 |
| Simulate robot path and detect boundedness Software EngineerCoding | Medium | Sep 6, 2025 |
| Implement queue-based rate limiter with multi-key limits Software EngineerCoding | Medium | Sep 6, 2025 |
| Detect runs and collapse a numeric grid Software EngineerCoding | Medium | Sep 6, 2025 |
| Design resource loader and ROS-like pub/sub Software EngineerSystem Design | Hard | Sep 6, 2025 |
| Design real-time game matchmaking service Software EngineerSystem Design | Hard | Sep 6, 2025 |
| Design a Static Audio Detection System Software EngineerSystem Design | Hard | Sep 6, 2025 |
| Design a scheduled payment system Software EngineerSystem Design | Hard | Sep 6, 2025 |
| Describe feedback, conflict, and missed metrics Software EngineerBehavioral | Medium | Sep 6, 2025 |
| Find largest digit-sum bucket size Software EngineerCoding | Medium | Aug 13, 2025 |
| Design a real-time favorites service at scale Software EngineerSystem Design | Hard | Aug 12, 2025 |
| Find most frequent call stack from logs Software EngineerCoding | Medium | Aug 11, 2025 |
| Handle feedback, conflict, missed metrics Software EngineerBehavioral | Medium | Aug 4, 2025 |
| Detect robot state after movements Software EngineerCoding | Medium | Aug 4, 2025 |
| Handle feedback, conflict, and missed metrics Software EngineerBehavioral | Medium | Aug 1, 2025 |
| Design robot path boundedness with repeats Software EngineerCoding | Medium | Aug 1, 2025 |
| Outline the ML inference and labeling pipeline Software EngineerSystem Design | Hard | Jul 31, 2025 |
| Design the manual review workflow Software EngineerSystem Design | Hard | Jul 31, 2025 |
| Design a static audio detection system Software EngineerSystem Design | Hard | Jul 31, 2025 |
| Define success metrics and monitoring Software EngineerProduct Sense | Hard | Jul 31, 2025 |
| Randomly partition array into k segments Software EngineerCoding | Medium | Jul 29, 2025 |
| Detect shuffle-mode sequence Software EngineerCoding | Medium | Jul 29, 2025 |
| Design in-game payment wallet system Software EngineerSystem Design | Medium | Jul 29, 2025 |
| Design sliding-window rate limiter with multi-keys Software EngineerSystem Design | Hard | Jul 16, 2025 |
| Design a real-time game recommendation system Machine Learning EngineerSystem Design | Hard | Jul 16, 2025 |
| Design game matchmaking and waiting queue Software EngineerSystem Design | Hard | Jul 15, 2025 |
| Implement Python Function for Statistical Test P-Values Data ScientistCoding | Medium | Jul 12, 2025 |
| Generate Friendship List with Acceptance Dates Using Pandas Data Scientist | Medium | Jul 12, 2025 |
| Evaluate Impact of New Roblox Homepage Tab Data ScientistProduct Sense | Medium | Jul 12, 2025 |
| Determine Player Preference for Local Game Creators Data ScientistProduct Sense | Hard | Jul 12, 2025 |
| Analyze Recent Orders Dataset with Python/pandas Data Scientist | Medium | Jul 12, 2025 |
