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Ace Your Technical Interview
2,000+ in-depth guides on system design, coding patterns, data structures, algorithms, and company-specific prep. Deep dives on distributed systems, graph algorithms, interview playbooks.
2,087 Guides
697+ System Design
96+ Company Guides
System Design
From URL shorteners to Netflix-scale video streaming. Architecture patterns, database internals, distributed systems, and infrastructure.
697+ guidesCoding Patterns
Two pointers, sliding window, dynamic programming, trees, graphs, backtracking, and more. Templates and problem-solving frameworks.
250+ guidesCompany Guides
Interview formats, question types, and preparation strategies for Google, Amazon, Meta, Apple, Netflix, Uber, Stripe, and more.
96+ companiesSystem Design Interview Guides
The most comprehensive system design resource online. Each guide covers architecture, tradeoffs, and production patterns.
URL Shortener
Twitter News Feed
Chat System (WhatsApp)
Rate Limiter
Notification System
Video Streaming (Netflix)
Payment System
Ride Sharing (Uber)
Distributed Cache
Key-Value Store
Search Autocomplete
Collaborative Editor
View all system design guides →
Coding Interview Patterns
Master the patterns that cover 90% of coding interview problems.
Dynamic Programming
Two Pointers & Sliding Window
Binary Search
Tree Traversals
Graph Algorithms
Backtracking
Monotonic Stack
Union-Find
Bit Manipulation
Heap / Priority Queue
Prefix Sum
Linked List Patterns
View all coding patterns →
Study Roadmaps by Experience Level
Beginner (0-1 years)
Data structures fundamentals, basic algorithms, Big-O notation, and your first coding problems.
Intermediate (2-4 years)
Advanced patterns, system design introduction, behavioral prep, and company-specific strategies.
Advanced (5+ years)
Staff+ system design, distributed systems deep dives, leadership principles, and architecture tradeoffs.
Company Interview Guides
Know exactly what to expect. Interview formats, question types, and prep strategies.
Adobe
Airbnb
Akuna Capital: Chicago Options Market Making, Python Stack, Trader Training
Amazon
Anthropic 2026: Claude, AI Safety Research, and Engineering at the Frontier
Apple
Asana 2026: Work Graph, Reactive Data, Luna Framework, and AI Studio
Atlassian 2026: Jira, Confluence, Team Anywhere, and Enterprise Multi-Tenant Engineering
Block 2026: Square, Cash App, Afterpay, Bitkey, and the Multi-BU Engineering Culture
Bloomberg
Brex 2026: Corporate Cards, Ruby/Rails Fintech, Ledger Design, and the Craft Round
Canva 2026: Sydney-HQ Design SaaS, WebGL Editor, Real-Time Collaboration, and Magic Studio AI
Chime 2026: Consumer Neobank Post-IPO, Go Microservices, and Partner-Bank Architecture
Cisco Interview
Citadel Securities 2026: Market Making, Trading Games, Low-Latency Systems, and Miami HQ
Cloudflare 2026: Edge Engineering, Networking Depth, Workers, and Rust
Cohere 2026: Enterprise AI, Command / Embed / Rerank, North Agent Platform, Toronto HQ
Coinbase 2026: Crypto Exchange Engineering, Matching Engine, Base L2, and Custody
Cursor 2026: Anysphere, AI-Native Code Editor, Tab Prediction, and Custom Model Training
D. E. Shaw 2026: Quant Hedge Fund, Academic Culture, Background Deep-Dive
Databricks
Datadog 2026: Observability Engineering, Streaming Data, and the Deep-Dive Round
Deel 2026: Global Payroll, EOR, International Contractor Payments, and Distributed Engineering
Discord 2026: Real-Time Messaging, Elixir + Rust, Voice Infrastructure, and Trust & Safety
DocuSign 2026: E-Signature Platform, PDF Internals, eIDAS Compliance, and IAM AI
DRW: Multi-Strategy Trading, Cumberland Crypto, Chicago Trading
Figma 2026: Collaborative Editor Engineering, CRDTs, and Frontend Performance
Fireworks AI 2026: Fastest Inference, CUDA Kernels, FireAttention, and Speculative Decoding
GitLab 2026: All-Remote DevOps Platform, Rails Monolith, and CREDIT Values
Google
HashiCorp 2026: Terraform, Vault, Consul, Nomad, and Post-IBM Engineering
Hex 2026: Collaborative Data Notebooks, Python / SQL Runtime, and Magic AI
HubSpot 2026: Customer Platform, Java/Kotlin, Multi-Tenant SaaS, and Breeze AI
Hudson River Trading 2026: HFT Engineering, Low-Latency Systems, and Competitive Coding
IMC Trading: Amsterdam Options Market Making, Trading Challenge, Quant Tech
Jane Street 2026: Mental Math Test, Probability Brainteasers, Trading Games, and OCaml
Jump Trading 2026: Chicago HFT, Futures, Jump Crypto, and Low-Latency C++
LangChain 2026: LLM Application Framework, LangGraph Agents, LangSmith Platform, and Enterprise AI
Linear 2026: Offline-First Sync Engine, Issue-Tracking Craft, and the Decisive Take-Home
LinkedIn
Mercury 2026: Startup Banking Platform, Haskell/Elm Stack, and the Craft Round
Meta (Facebook)
Microsoft
Millennium Management: Pod-Shop Hedge Fund, Risk Discipline, Multi-Strategy
Mistral AI 2026: European Frontier Lab, Open-Weight Strategy, MoE, and La Plateforme
Modal 2026: Serverless GPU Compute, Custom Scheduler, and Python-First Infrastructure
MongoDB 2026: Document Database Internals, Atlas Platform, and Vector Search
MotherDuck 2026: DuckDB-Based Serverless Analytics, Hybrid Execution, and Jordan Tigani Heritage
Neon 2026: Serverless Postgres, Rust Storage Engine, Branching, and Databricks Integration
Netflix
Notion 2026: Connected Workspace, Block-Based Data Model, CRDTs, and Notion AI
Nvidia 2026: GPU Architecture, CUDA Kernels, Distributed Training, and the AI Boom
OpenAI 2026: ChatGPT, GPT-4, Research Engineering, and PPU Compensation
Optiver: Options Market Making, Probability & Trading Speed
Oracle Interview
Palantir
PayPal 2026: Legacy Fintech at Scale, Venmo, Braintree, and the Modernization Reality
Perplexity 2026: AI Answer Engine, Retrieval and Ranking, Comet Browser, and Product-First AI
Pinterest Interview
Plaid 2026: Financial Data Infrastructure, Idempotency, and Bank API Engineering
PlanetScale 2026: Vitess-Based MySQL Platform, Sharding, Branching, and Multi-Cloud
Point72: Pod-Shop Hedge Fund, Cubist Quant Arm, and PM Track
Postman 2026: API Development Platform, Cloud Sync, Flows, and Postbot AI
Ramp 2026: AI-Native Finance Platform, Corporate Cards, and Ramp Intelligence
Reddit Interview
Replicate 2026: AI Model-Serving Platform, Cog Container Format, and Community Models
Retool 2026: Internal-Tools Platform, Reactive Engine, JavaScript Sandboxing, and AI Agents
Rippling 2026: Unified Workforce Platform, Employee Graph, Compound Software, and Global Payroll
Robinhood 2026: Retail Trading at Scale, Order Routing, and 24-Hour Markets
Roblox 2026: Immersive Platform Engineering, Real-Time Networking, and LuaU
Salesforce
SAP Interview
Scale AI 2026: Post-Meta Deal, LLM Evaluations, RLHF Data Pipelines
ServiceNow 2026: Now Platform, Multi-Tenant Enterprise, and Now Assist AI
Shopify
SIG (Susquehanna): Poker, Options & Decision Theory
Snap
Snowflake 2026: Data Cloud Architecture, C++ Query Engine, Separation of Storage and Compute
Sourcegraph 2026: Code Intelligence, Cody AI Coding, and Fully-Remote Culture
Spotify
Stripe
Supabase 2026: Open-Source Postgres Platform, Realtime, Edge Functions, and Vector Search
Tesla
Together AI 2026: Open-Model Inference, CUDA Kernels, Speculative Decoding, and Enterprise AI
Tower Research Capital: Quantitative Trading, Team Autonomy, Engineering Platform
Turso 2026: SQLite-For-Production, libSQL, Embedded Replicas, and Edge Deployment
Twitch
Two Sigma 2026: Quant Research Hedge Fund, Statistics Depth, Engineering Culture
Uber
Vanta 2026: Compliance Automation, SOC 2 / ISO, Integration Engineering, and Trust Surface
Vercel 2026: Next.js, Edge Runtime, Turbopack, and Frontend Platform Engineering
Virtu Financial: Public-Company Market Making, Equity HFT, Customer Liquidity
Wealthfront 2026: Robo-Advising, Tax-Loss Harvesting, and High-Algorithm Fintech
Workday 2026: HCM and Finance Platform, OMS Architecture, and Workday Illuminate AI
xAI 2026: Grok, Colossus Supercluster, Musk-Style Pace, and Frontier Lab Engineering
Zoom 2026: Real-Time Media, SFU Architecture, WebRTC, and AI Companion
Latest Guides
Linear Algebra for Quant Interviews: What Is Actually TestedApr 25
Monty Hall Variations: Game-Show Probability for Quant InterviewsApr 25
Conditional Probability and Bayesian Interview Problems for Quant RolesApr 25
100 Prisoners, Hats, and Light Bulbs: Classic Quant BrainteasersApr 25
Market-Making Interview Questions: Bid-Ask, Fair Value, Spread ReasoningApr 25
Random Walks and Stopping Times for Quant InterviewsApr 25
Expected Value and Fair-Game Reasoning for Quant InterviewsApr 25
Mental Math Drills for Trading Interviews: How to Pass the TestApr 25