| Stripe |
Payment State Machine (OA) |
Medium |
🔥 Oct 04, 2026 |
| Amazon |
Checkout Price Engine (OOD) |
Medium |
🆕 Oct 02, 2026 |
| Snowflake |
Tiered Rate Limiting Service |
Medium |
🆕 Oct 01, 2026 |
| OpenAI |
Poker Simulation |
Medium |
🆕 Sep 28, 2026 |
| Google |
URL Request Handler Router |
Medium |
🆕 Sep 28, 2026 |
| Amazon |
Extensible File Search |
Medium |
🆕 Sep 18, 2026 |
| Rippling |
Design Raw and Computed Spreadsheet Views |
Hard |
🆕 Sep 18, 2026 |
| Google |
Design Extensible Spreadsheet Aggregation APIs |
Medium |
🆕 Sep 18, 2026 |
| Citadel |
Define a Reliable Trade-Reconciliation Library Contract |
Hard |
🆕 Sep 18, 2026 |
| Render |
Rate Limit an API During a Traffic Attack |
Medium |
🆕 Sep 17, 2026 |
| Tradedesk |
Selection-State Class for an Infinite-Scroll Checkbox List with Select All |
Hard |
🆕 Sep 15, 2026 |
| Tradedesk |
Implement a Publish-Subscribe Event Bus in JavaScript or TypeScript |
Medium |
🆕 Sep 15, 2026 |
| Robinhood |
Design an iOS Timer App with Consistent State and Asynchronous UI Updates |
Medium |
🆕 Sep 15, 2026 |
| xAI |
Render Nested JSON in a Code-Style Viewer |
Medium |
🆕 Sep 15, 2026 |
| Tesla |
Implement Reduce and Derive Map and Filter from It |
Medium |
🆕 Sep 13, 2026 |
| Goldman Sachs |
Cache Trade-offs and a Constant-Time Least-Recently-Used Cache |
Medium |
🆕 Sep 13, 2026 |
| Rippling |
Extend an Expense Rules Engine with Nested Boolean Conditions |
Hard |
🆕 Sep 11, 2026 |
| Stripe |
Design a String-Rule Validator for Transaction Records |
Medium |
🆕 Sep 11, 2026 |
| Amazon |
Recent Ad-Click Counter |
Easy |
🆕 Sep 11, 2026 |
| Lyft |
Design a Globally Versioned Key-Value Store |
Medium |
🆕 Sep 08, 2026 |
| Citadel |
Deduplicating File System |
Medium |
🆕 Sep 08, 2026 |
| Shopify |
Bank Account Simulation Class With Self-Written Tests at 90% Coverage |
Medium |
🆕 Sep 07, 2026 |
| LinkedIn |
Recommender Training Pipeline |
Hard |
🆕 Sep 06, 2026 |
| ByteDance |
LRU Cache (with TTL and LFU Follow-ups) |
Medium |
🆕 Sep 06, 2026 |
| Ziphq |
Track Repeated Approval Alerts and Safely Update Alert Levels |
Hard |
🆕 Sep 05, 2026 |
| Tesla |
Handle API Errors with Python Requests |
Medium |
🆕 Sep 04, 2026 |
| Meta |
Design and Evaluate a Solver for a 36-Card Sum-Fifteen Game |
Medium |
🆕 Sep 04, 2026 |
| Reddit |
Design Add, Overwrite, Undo, and Redo for Billing State |
Medium |
🆕 Sep 04, 2026 |
| Atlassian |
Design a Music Player with Queue, Loop, and Shuffle |
Medium |
🆕 Sep 03, 2026 |
| Amazon |
Design an Object-Oriented Shopping Cart |
Medium |
Sep 02, 2026 |
| ByteDance |
Seller Task Scheduler |
Medium |
Sep 02, 2026 |
| LinkedIn |
Merge and Serialize N-ary Trees |
Hard |
Sep 01, 2026 |
| Amazon |
Manual Queue Implementation |
Medium |
Sep 01, 2026 |
| Disney |
Thread-Safe Buffered Batch Writer for Streaming Records into a Database |
Hard |
Aug 30, 2026 |
| Applied Intuition |
Locate Cars with a Boolean Square-Scan API |
Medium |
Aug 30, 2026 |
| Airbnb |
Design an In-Memory Object Manager with TTL |
Medium |
Aug 30, 2026 |
| Google |
Design a Bookshelf with Book CRUD and a Stable Bookmark |
Medium |
Aug 30, 2026 |
| Google |
Compute Entity Size and Validate a Hierarchical File System |
Hard |
Aug 30, 2026 |
| Microsoft |
Design a Dictionary for Heterogeneous Key and Value Types |
Medium |
Aug 30, 2026 |
| Airbnb |
Define a File Store with User Quotas and Compression |
Hard |
Aug 29, 2026 |
| Pinterest |
Model Elevator Dispatch for Sequential and Overlapping Calls |
Hard |
Aug 28, 2026 |
| Snapchat |
Design and Implement a Thread-Safe LRU Cache |
Medium |
Aug 28, 2026 |
| OpenAI |
Model Infection, Immunity, Delayed Death, and Burn Interventions on a Grid |
Hard |
Aug 27, 2026 |
| Coinbase |
Build Task Management Through Records, Search, Assignment, and Completion |
Medium |
Aug 27, 2026 |
| Amazon |
Spreadsheet Cell Relationships |
Hard |
Aug 27, 2026 |
| Scale AI |
Design and Simulate a Four-Player Card Game |
Medium |
Aug 26, 2026 |
| Airbnb |
Design a Multi-Level In-Memory Cloud Storage Service |
Medium |
Aug 25, 2026 |
| Anthropic |
Implement a Duplicate-File Reporter |
Medium |
Aug 24, 2026 |
| OpenAI |
Design Alternating Card Dealing and Hand Comparison |
Easy |
Aug 23, 2026 |
| Amazon |
Design a Debounced Product Search Box |
Medium |
Aug 22, 2026 |
| Tradedesk |
Process Operations in a Timestamped In-Memory Database |
Hard |
Aug 22, 2026 |
| OpenAI |
Image Sharing with Content Deduplication |
Hard |
Aug 22, 2026 |
| Netflix |
Implement a Key-Value Cache with Per-Entry Expiration |
Medium |
Aug 21, 2026 |
| Rippling |
Design a Logger with Independent Handlers |
Medium |
Aug 21, 2026 |
| Microsoft |
Multi-Key Bounded Task Executor |
Hard |
Aug 20, 2026 |
| Google |
Implement Python's itertools.tee |
Medium |
Aug 20, 2026 |
| NVIDIA |
Implement and Explain a C++ Smart Pointer |
Hard |
Aug 19, 2026 |
| Squarepoint |
Design an Ordered Vector with Move Semantics and Analyze Its Memory Layout |
Hard |
Aug 16, 2026 |
| OpenAI |
Design a Dependency-Aware Concurrent Tool Scheduler |
Medium |
Aug 16, 2026 |
| Meta |
Number of Islands API Variant |
Medium |
Aug 16, 2026 |
| OpenAI |
Fault-Tolerant Work Queue |
Hard |
Aug 13, 2026 |
| Figma |
Select Table and Set Color |
Medium |
Aug 12, 2026 |
| Uber |
Filesystem Navigation |
Medium |
Aug 11, 2026 |
| ByteDance |
AI-Assisted Order Validator |
Medium |
Aug 06, 2026 |
| Affirm |
Group Loans by Top-Level Company |
Medium |
Aug 06, 2026 |
| Pinterest |
Experiment Bucket Allocation / Rebalancing |
Medium |
Aug 03, 2026 |
| Snowflake |
Priority Task Executor |
Medium |
Aug 01, 2026 |
| Lyft |
Design Pagination API |
Medium |
Jul 29, 2026 |
| Amazon |
Employee Total-Cost Object Model |
Medium |
Jul 22, 2026 |
| Meta |
Tally Service |
Medium |
Jul 20, 2026 |
| Meta |
Randomized Container |
Medium |
Jul 19, 2026 |
| OpenAI |
Chat Message Events Aggregation |
Medium |
Jul 15, 2026 |
| Figma |
Design Document Layer System |
Medium |
Jul 06, 2026 |
| Harvey |
Spreadsheet with Cell Dependencies |
Hard |
Jul 2026 |
| Amazon |
Pizza / Restaurant System |
Medium |
Jul 01, 2026 |
| Apple |
Hotel Booking System OOD Coding |
Medium |
Jun 28, 2026 |
| Databricks / Google |
Tic-Tac-Toe II |
Medium |
Jun 26, 2026 |
| Okta |
Concurrent Simple Bank System |
Medium |
Jun 24, 2026 |
| Okta |
CD Rental System (Java DSA / LLD) |
Medium |
Jun 24, 2026 |
| Uber |
Compare Two Structs / Classes for Equality |
Medium |
Jun 23, 2026 |
| Goldman Sachs |
ClayWorkspace Resource Tree |
Medium |
Jun 21, 2026 |
| OpenAI |
Resumable Iterator with Multi-Dimensional Support |
Medium |
Jun 20, 2026 |
| Goldman Sachs |
Implement a Deque |
Easy |
Jun 18, 2026 |
| Rippling |
Expense System |
Medium |
Jun 18, 2026 |
| Rippling |
Delivery Cost Calculate |
Medium |
Jun 18, 2026 |
| Snowflake |
Dynamic Blacklist Filter System |
Medium |
Jun 17, 2026 |
| Bloomberg |
Design Underground System |
Medium |
Jun 16, 2026 |
| Uber |
First Customer Who Visited Only Once |
Medium |
Jun 15, 2026 |
| Coinbase |
Ring Buffer (Producer / Consumer with Backpressure) |
Hard |
Jun 15, 2026 |
| Anthropic |
Bank System with Transfer/Accept and Merge |
Medium |
Jun 15, 2026 |
| Snowflake / ByteDance / Netflix |
Parallel Courses III |
Medium |
Jun 15, 2026 |
| Perplexity / Harvey / Shopify |
In-Memory Unix File System |
Medium |
Jun 15, 2026 |
| Waymo |
OO Design: Continuous Time Intervals from Two Timestamp Signal Streams |
Medium |
Jun 13, 2026 |
| Ebay |
Circular Storage Allocator |
Medium |
Jun 12, 2026 |
| Reddit |
Tennis Scoring II |
Medium |
Jun 12, 2026 |
| OpenAI |
Monster Team Battle |
Medium |
Jun 12, 2026 |
| DoorDash / xAI |
Dasher Payment Model |
Medium |
Jun 11, 2026 |
| Amazon |
Event Filter & Queue Routing Service |
Medium |
Jun 11, 2026 |
| DoorDash |
Pick Dasher / Round Robin Load Balancer |
Medium |
Jun 11, 2026 |
| OpenAI / ByteDance |
Contiguous Memory Allocator II |
Medium |
Jun 11, 2026 |
| Google |
Employee Hierarchy Add / Delete |
Medium |
Jun 10, 2026 |
| DoorDash |
Code Craft: Validate Cart |
Medium |
Jun 10, 2026 |
| Pinterest |
Splitwise / Settle Group Balances |
Medium |
Jun 10, 2026 |
| Anthropic |
Find Duplicate Files |
Medium |
Jun 10, 2026 |
| Rippling |
Logger System |
Medium |
Jun 09, 2026 |
| Uber |
Random Bingo Card Generator |
Medium |
Jun 06, 2026 |
| Uber / Amazon |
Parking Lot System II |
Medium |
Jun 06, 2026 |
| Verkada |
Design Ambient Light Sensor System |
Medium |
Jun 05, 2026 |
| Verkada |
Camera Log Relay Server |
Medium |
Jun 05, 2026 |
| Databricks |
Customer Revenue System |
Medium |
Jun 05, 2026 |
| Airbnb |
Boxes, Keys & Candies |
Medium |
Jun 02, 2026 |
| Databricks / Microsoft |
Snapshot Set Iterator |
Medium |
Jun 2026 |
| OpenAI / Uber |
Snapshot Social Graph |
Medium |
Jun 2026 |
| Databricks |
Encrypt All Files in a File-System Tree |
Medium |
Jun 2026 |
| Amazon |
Playlist / Guide Voting System |
Medium |
May 31, 2026 |
| Optiver |
Thread-Safe Buy/Sell Without Overselling |
Medium |
May 30, 2026 |
| Uber |
Last-Click Attribution Tracker |
Medium |
May 29, 2026 |
| Rippling |
Camel Cards (Simplified Poker) |
Medium |
May 29, 2026 |
| Anthropic |
File Systems |
Medium |
May 28, 2026 |
| Anthropic |
Task Manager (TTL + Snapshot) |
Medium |
May 27, 2026 |
| Apple / ByteDance / LinkedIn |
Design a HashMap |
Easy |
May 27, 2026 |
| Anthropic |
DNS Resolver (Fellows CodeSignal, Round 1) |
Hard |
May 27, 2026 |
| Meta |
Banking System (Progressive OOD) |
Hard |
May 26, 2026 |
| Pinterest / Oracle |
Sparse Matrix Operation |
Medium |
May 26, 2026 |
| OpenAI |
Toy Language Type System |
Medium |
May 26, 2026 |
| Perplexity |
ToDo List with Task Dependencies |
Medium |
May 26, 2026 |
| Akuna Capital |
Portfolio Rebalancer |
Medium |
May 25, 2026 |
| Rippling |
Design Article System |
Medium |
May 25, 2026 |
| Anthropic |
Implement a Banking System |
Medium |
May 24, 2026 |
| Airbnb / Snowflake / Square |
Design Connect Four |
Medium |
May 24, 2026 |
| Amazon |
Pub-Sub Messaging System |
Medium |
May 22, 2026 |
| Waymo |
Debug a NumPy / Tensor Framework |
Medium |
May 22, 2026 |
| Stripe |
Hotel Booking Reminder |
Medium |
May 22, 2026 |
| Anthropic / Coinbase / HubSpot / Ramp |
Design a Task Assignment System |
Medium |
May 21, 2026 |
| Microsoft |
Org Chart Report Count (Tree Aggregation) |
Medium |
May 21, 2026 |
| Microsoft |
Contiguous Memory Allocator |
Medium |
May 21, 2026 |
| Citadel |
Thread-Safe Key Call Counter |
Hard |
May 21, 2026 |
| Netflix |
Versioned File System |
Medium |
May 21, 2026 |
| Roblox / Amazon / Apple / DoorDash |
Implement Trie (Prefix Tree) |
Easy |
May 20, 2026 |
| Airbnb |
Key Store With Sum-Dependency Cascades |
Hard |
May 19, 2026 |
| Airbnb |
Multi-Stream Round-Robin Iterator |
Medium |
May 19, 2026 |
| Figma |
File System Permissions |
Medium |
May 14, 2026 |
| Anthropic |
Weighted Data Batcher with Checkpointing |
Medium |
May 14, 2026 |
| Apple |
Kubernetes Service Filter & Dependency Chain |
Medium |
May 14, 2026 |
| Netflix |
Weighted Cache |
Hard |
May 12, 2026 |
| Uber |
Uber Eats Cart & Pricing Engine |
Medium |
May 12, 2026 |
| Anthropic |
Worker / Employee Grant Management |
Medium |
May 10, 2026 |
| Uber |
Design Meeting Scheduler |
Medium |
May 10, 2026 |
| Coinbase |
Frontend Tech Execution — Reusable Dropdown Component |
Medium |
May 08, 2026 |
| Citadel |
Order Book Pair Coding |
Medium |
May 07, 2026 |
| Reddit |
Design Tennis Scoring with Pluggable Rules |
Medium |
May 06, 2026 |
| Coinbase |
Worker Salary |
Medium |
May 06, 2026 |
| Scale AI |
LLM API Practical and Output Validation |
Medium |
May 01, 2026 |
| DoorDash |
Code Craft: Bootstrap Aggregated API |
Medium |
May 01, 2026 |
| Reddit |
Reconstruct Billing Status |
Medium |
May 2026 |
| Harvey / Airtable |
Implement a DB Connection Pool |
Medium |
Apr 30, 2026 |
| Tesla |
Rollback-Capable KV Store with Nested Transactions |
Medium |
Apr 30, 2026 |
| Netflix |
Tagged Command Undo |
Medium |
Apr 30, 2026 |
| Coinbase / Anthropic / Applied Intuition |
In-Memory Database |
Medium |
Apr 28, 2026 |
| Netflix |
Latency Tracker Percentile |
Medium |
Apr 24, 2026 |
| Instacart |
In-Memory Key-Value Store |
Medium |
Apr 23, 2026 |
| Waymo |
Process Raw CSV for Downstream Consumers |
Medium |
Apr 22, 2026 |
| Atlassian |
Popular Content Counter |
Medium |
Apr 21, 2026 |
| Pinterest |
Grant / Revoke / Check Access on Hierarchy |
Medium |
Apr 21, 2026 |
| ByteDance |
Implement Sliding Windows and LRU Cache |
Medium |
Apr 20, 2026 |
| Amazon |
Implement Cache and Rotate Matrix |
Medium |
Apr 20, 2026 |
| Coinbase |
Food Delivery System (Multi-Level Coding) |
Medium |
Apr 20, 2026 |
| Rippling |
Implement logger and card ranking |
Medium |
Apr 19, 2026 |
| Pinterest |
Escape Room |
Medium |
Apr 19, 2026 |
| Netflix |
Implement TTL Cache and Tree Balance Reporting |
Medium |
Apr 17, 2026 |
| Instacart |
Implement an In-Memory File Storage System |
Medium |
Apr 17, 2026 |
| Anthropic |
ML Configuration System |
Medium |
Apr 17, 2026 |
| Netflix |
Implement ordering and undo executor |
Hard |
Apr 15, 2026 |
| NVIDIA |
Disk Space Manager / KV Store with setAll |
Medium |
Apr 15, 2026 |
| Amazon |
Rate Limiter |
Medium |
Apr 15, 2026 |
| Applied Intuition |
Implement a Fixed-Capacity Deque |
Medium |
Apr 14, 2026 |
| Oracle / Shopify |
LRU Cache with Expiration |
Medium |
Apr 14, 2026 |
| Meta |
Friend Recommendation II |
Medium |
Apr 14, 2026 |
| Asana |
Design and Solve a Rotatable Jigsaw Puzzle |
Hard |
Apr 13, 2026 |
| Amazon |
Minesweeper Game Design |
Medium |
Apr 13, 2026 |
| Databricks / Amazon |
Design Lazy Array |
Medium |
Apr 13, 2026 |
| Harvey |
Implement a Hierarchical File System |
Medium |
Apr 12, 2026 |
| Faire |
Design an API for Pascal Triangle |
Medium |
Apr 10, 2026 |
| Microsoft |
Implement SQL Table and DNA Ordering |
Medium |
Apr 10, 2026 |
| Bobyard |
Implement comment sorting and nesting |
Medium |
Apr 09, 2026 |
| Scale AI |
Design a Streaming Job Scheduler |
Hard |
Apr 09, 2026 |
| Ebay |
Implement a Prefix-Based Word Store |
Medium |
Apr 08, 2026 |
| Capital One |
Bank Class OOD: Deposit / Withdraw / Transfer |
Medium |
Apr 08, 2026 |
| Microsoft |
Implement concurrent structures and debug queue code |
Medium |
Apr 07, 2026 |
| Two Sigma |
In-Memory SQL-Like Database |
Medium |
Apr 07, 2026 |
| Walmart Labs |
Live Refactor: Function → Production Service |
Medium |
Apr 06, 2026 |
| Netflix |
Implement a Versioned Key-Value Store |
Medium |
Apr 05, 2026 |
| Meta |
Implement Multi-Level In-Memory Services |
Hard |
Apr 04, 2026 |
| xAI |
Multithreaded BankAccount Race-Condition Bug Hunt |
Medium |
Apr 04, 2026 |
| Discord |
Implement Game Metadata Lookups |
Medium |
Apr 03, 2026 |
| Waymo |
Battleship Board (React, Frontend Onsite) |
Medium |
Apr 03, 2026 |
| Asana |
Design a 2048 Game |
Medium |
Apr 02, 2026 |
| Rippling |
Design an Extensible Rule Engine |
Medium |
Apr 02, 2026 |
| Coinbase |
Implement Game Physics and Block Mining |
Medium |
Apr 02, 2026 |
| xAI |
Resumable Iterator with Save / Restore State |
Medium |
Apr 02, 2026 |
| Lead Bank |
Implement Stock Price Query APIs |
Hard |
Apr 01, 2026 |
| xAI |
In-Memory Database — Levels 1–4 (TTL + Backup/Restore) |
Hard |
Apr 01, 2026 |
| Harvey |
Design a Text Editor |
Medium |
Apr 2026 |
| Netflix |
Multi-thread Atomic Counter |
Easy |
Mar 31, 2026 |
| OpenAI |
ModalLock and FairModalLock |
Hard |
Mar 30, 2026 |
| Robinhood |
Friends Money Transfer Request Processor |
Medium |
Mar 30, 2026 |
| Stripe |
Account Scheduler with LRU |
Medium |
Mar 27, 2026 |
| Microsoft |
KV Store with Snapshot Versions |
Hard |
Mar 23, 2026 |
| Uber |
OOD Counter Class |
Medium |
Mar 23, 2026 |
| Uber |
Customer Revenue and Referral Tracking |
Medium |
Mar 22, 2026 |
| Amazon |
Recursive Schema Validation |
Medium |
Mar 21, 2026 |
| DoorDash |
Build UI from Mockup with API |
Medium |
Mar 20, 2026 |
| Snapchat |
In-Memory Pub/Sub |
Medium |
Mar 18, 2026 |
| Amazon |
Line Intersection Points |
Medium |
Mar 17, 2026 |
| Apple / Google / LinkedIn / Microsoft / Salesforce |
LFU Cache |
Medium |
Mar 17, 2026 |
| Robinhood |
Implement Calendar Layout and String Packing |
Medium |
Mar 16, 2026 |
| Anthropic |
Implement a crash-resilient LRU cache |
Medium |
Mar 13, 2026 |
| Rippling |
Implement a balance tracker and interval merger |
Medium |
Mar 10, 2026 |
| Citadel |
Single-Producer Multi-Consumer Ring Buffer |
Medium |
Mar 08, 2026 |
| Amazon |
Implement Cache and Count Components |
Medium |
Mar 07, 2026 |
| LinkedIn |
Max Stack |
Medium |
Mar 02, 2026 |
| Apple / Uber |
Design Hit Counter |
Medium |
Mar 02, 2026 |
| Coinbase |
Implement a crypto order management system |
Medium |
Mar 01, 2026 |
| Glean |
Implement 2048 Game Logic |
Medium |
Mar 01, 2026 |
| Snapchat |
Custom List, Iterator & Map Function |
Medium |
Feb 26, 2026 |
| Ramp |
Frontend Hidden URL and React Wordle |
Medium |
Feb 26, 2026 |
| Apple |
Design a Deck of Cards |
Medium |
Feb 26, 2026 |
| Snowflake / Applied Intuition / Lyft |
Design Key-Value Store with Transactions |
Medium |
Feb 26, 2026 |
| Google |
Design an editable sequence with marker |
Hard |
Feb 24, 2026 |
| Google |
Design a Dormitory Room-Assignment System |
Medium |
Feb 22, 2026 |
| Amazon |
Music Player with Frequency Priority |
Medium |
Feb 22, 2026 |
| Airbnb |
Banking — Deposit / Withdraw / Transaction / Balance |
Medium |
Feb 19, 2026 |
| Harvey |
Implement tag matcher and filesystem |
Medium |
Feb 18, 2026 |
| Cursor |
Implement Notification Rate Limiter |
Medium |
Feb 18, 2026 |
| Reddit |
Report Chain |
Medium |
Feb 17, 2026 |
| Scale AI / Verkada |
Design Card Game II |
Medium |
Feb 16, 2026 |
| Nuro |
Coordinate Video Reading and Rendering at 25 Frames per Second |
Hard |
Feb 15, 2026 |
| Atlassian |
Org Tree Lowest Common Department |
Medium |
Feb 15, 2026 |
| Coinbase |
Interleave Iterator |
Medium |
Feb 13, 2026 |
| Airtable |
Optimize a dispatcher’s scheduling data structures |
Hard |
Feb 12, 2026 |
| Bloomberg |
Implement sliding-window timestamped average |
Medium |
Feb 12, 2026 |
| Microsoft |
Implement interval room counter and token manager |
Medium |
Feb 12, 2026 |
| Lead Bank |
Implement a versioned hash map with snapshot |
Medium |
Feb 12, 2026 |
| ByteDance |
Implement stack variants and path-sum check |
Medium |
Feb 12, 2026 |
| NVIDIA |
Computation / Dependency Graph Validation and Pruning |
Medium |
Feb 12, 2026 |
| LinkedIn |
Meeting Scheduler — Earliest Available Slot |
Medium |
Feb 12, 2026 |
| Goldman Sachs |
Transaction Authorizer / Fraud Checks |
Medium |
Feb 12, 2026 |
| Ramp |
Multi-Level Warehouse Storage with Weighted Retrieval |
Hard |
Feb 11, 2026 |
| Meta |
Implement a versioned in-memory DB with CAS and history |
Hard |
Feb 11, 2026 |
| Meta |
Extend cloud file system with copy and compression |
Hard |
Feb 11, 2026 |