Watch & Learn
Real-time build-alongs, deep-dives, and Q&A — covering React, AI integration, performance, and system design.
12+
Sessions
8K+
Total Views
40h+
Content
6
Topics
End-to-end build: chunking docs, generating embeddings with OpenAI, storing in pgvector, and wiring up a streaming Next.js 15 chat UI — all in one session.
Demystifying RSC boundaries, data fetching patterns, and the streaming architecture behind Next.js App Router.
Building a GPU-instanced particle system with custom GLSL shaders, mouse interaction, and post-processing.
Multi-step agents with tool use, memory, and human-in-the-loop checkpoints — built live using LangGraph and FastAPI.
Conditional types, infer keyword, mapped types, and template literal types explained with live coding exercises.
Auth, payments, database, and dashboard — a complete SaaS starter built live with Next.js, Stripe, and Prisma.
12+ recorded sessions covering AI, React, WebGL, TypeScript, and DevOps.
View YouTube Channel ↗CS Fundamentals
Strong fundamentals drive better software. From optimal algorithms to distributed architectures — I train daily and apply these patterns in production.
@suboorkhan
450+
Solved
320+
Day Streak
82%
Acceptance
Difficulty Breakdown
Proficiency levels
Distributed systems expertise
Scalability Patterns
Horizontal scaling, consistent hashing, sharding, read replicas, CQRS
Storage & Caching
SQL vs NoSQL trade-offs, Redis, CDN layers, write-through vs write-behind
Messaging & APIs
Kafka, RabbitMQ, REST vs gRPC vs GraphQL, rate limiting, API gateways
Reliability
Circuit breakers, bulkheads, retries with exponential backoff, chaos engineering
Max subarray sum, longest substring without repeats, minimum window substring — O(n) solutions replacing O(n²).
3Sum, trapping rain water, container with most water — collapses a nested loop into a single linear pass.
Graph traversal, island counting, word ladder, shortest path in unweighted graphs — the backbone of tree/graph problems.
Knapsack, longest common subsequence, coin change, edit distance — memoisation and tabulation from scratch.
Search in rotated arrays, kth smallest element, capacity problems — apply on answer space, not just sorted arrays.
Permutations, subsets, N-Queens, sudoku solver — prune early, build incrementally, never over-allocate state.
Number of connected components, redundant connection, accounts merge — path compression + union by rank for near-O(1).
Next greater element, largest rectangle in histogram, daily temperatures — O(n) solutions via invariant maintenance.
System Design Deep Dive
🐦
Twitter / X Clone
Fanout on write vs read, timeline aggregation, tweet ranking, media CDN, 10M DAU scale
🎬
YouTube / Video Platform
Video ingestion pipeline, adaptive bitrate streaming, transcoding workers, recommendation engine
🛒
E-Commerce Platform
Product catalog, inventory ledger, flash sales with Redis INCR, order saga pattern, payment idempotency
💬
Real-time Chat (WhatsApp)
WebSocket servers, message persistence, delivery receipts, end-to-end encryption, group fanout
🔗
URL Shortener (Bit.ly)
Base62 encoding, consistent hashing for redirect tier, analytics pipeline, 100K QPS read path
🔍
Search Engine (Typeahead)
Inverted index, trie-based autocomplete, TF-IDF ranking, MapReduce crawler, web-scale sharding
Live Code
Real React & Node.js code — auto-typed, compiled and rendered live.
▋React + Node.js App
Output will appear here…
Get In Touch
Have an exciting project? I'm always open to new opportunities and collaborations.