Hands-on exercises across multiple languages and topics.
Master array manipulation, hash maps, two-pointer techniques, and sliding window patterns — the most common interview topics at top tech companies.
Build fluency with string manipulation, pattern matching, parsing, and text processing — essential for coding screens and take-home assessments.
Practice pointer manipulation, reversal, cycle detection, and merge operations — classic interview staples that test your understanding of data structures.
Conquer BFS, DFS, tree traversals, and graph algorithms — favorites at FAANG and top-tier companies.
Learn memoization, tabulation, and optimal substructure — the category that separates good candidates from great ones in technical interviews.
Master binary search variations, sorting algorithms, and divide-and-conquer strategies that form the foundation of efficient problem solving.
Practice monotonic stacks, bracket matching, and queue-based algorithms — surprisingly common in real interviews.
Build confidence with recursive thinking, permutations, combinations, and constraint satisfaction problems.
Learn when and how to apply greedy strategies — interval scheduling, activity selection, and optimization problems that appear in top-tier interviews.
Build production-quality REST APIs with proper routing, validation, error handling, and middleware — skills every backend engineer needs on the job.
Master SQL queries, joins, window functions, CTEs, and aggregations — increasingly tested in technical interviews and essential for every developer.
Build the building blocks of distributed systems: caches, rate limiters, message brokers, and more — hands-on practice that goes beyond whiteboard diagrams.
Master hooks, component patterns, state management, and testing — the skills that land frontend engineering roles.
Build with the dominant full-stack framework: server components, app router, API routes, and server actions.
Build backend services with Express: middleware, authentication, error handling, and API patterns — the backbone of Node.js interviews.
Build web APIs with Flask and FastAPI: validation, dependency injection, blueprints, and async patterns for Python backend roles.
Go beyond basic types: generics, utility types, type guards, and advanced patterns that are expected at most companies in 2026.
Build AI-powered features: LLM API integration, prompt engineering, structured output, RAG patterns, and error handling — the must-have skill of 2026.