The deeper companion to my short-form videos. Every video on Instagram, TikTok, and YouTube Shorts gets ~60 seconds — this repo is where I unpack the concept, the tradeoffs, and the production-grade version of whatever was in the post.
If you landed here from a "comment guide" → you're in the right place. Find the topic, read the long version, follow the linked resources for even deeper dives.
- Instagram — @sayed.developer
- TikTok — @sayed.developer
- YouTube — @sayeddev
Concept deep-dives, checklists, and roadmaps.
| Topic | Tags | Video |
|---|---|---|
| Graph Databases | databases graphs neo4j |
Watch |
| How Tinder Finds Matches in Milliseconds | system-design geospatial s2-library |
Watch |
| Cloud Engineer Roadmap 2027 | cloud roadmap aws azure devops |
Watch |
| GitHub Actions | ci-cd automation github devops |
Watch |
| The CI/CD Pipeline That Earns a One-Word Deploy | ci-cd devops deployment security production interview |
coming soon |
| Minikube — Kubernetes on Your Laptop | kubernetes minikube devops containers |
Watch |
| VPN vs Proxy | networking security privacy vpn proxy |
Watch |
| UUID | databases distributed-systems primary-keys |
Watch |
| How Global Apps Keep You Logged In | system-design auth jwt sessions load-balancer |
Watch |
| JWT — The Signed Envelope | auth jwt security cookies refresh-tokens interview |
coming soon |
| JWT vs Session Cookies | auth jwt sessions cookies security xss interview |
coming soon |
| Designing Google Docs | system-design websockets operational-transform collaboration |
Watch |
| Process vs Thread | os concurrency processes threads interview |
Watch |
| Regular Expressions (Regex) | regex python text-processing validation |
coming soon |
| DevOps Engineer Roadmap 2027 | devops roadmap docker kubernetes terraform ci-cd |
coming soon |
| Data Scientist Roadmap 2027 | data-science roadmap machine-learning python mlops |
coming soon |
| Backend Engineer Roadmap 2026 | backend roadmap python fastapi sql postgres cloud terraform |
coming soon |
| Pre-Deployment Checklist | deployment security production devops checklist |
coming soon |
| Vector Databases | vector-database embeddings cosine-similarity rag ai-engineering interview |
coming soon |
| RAG Chunking Strategy | rag vector-database chunking embeddings ai-engineering |
coming soon |
| Prompt Caching | ai-engineering llm prompt-caching kv-cache performance interview |
coming soon |
| Kotlin Multiplatform | mobile kotlin multiplatform android ios compose |
coming soon |
| CDN Anycast Routing | cdn system-design networking anycast latency interview |
coming soon |
| Bulk Loads & Indexes | databases indexes performance b-tree bulk-loads interview |
coming soon |
| Real-Time Collaboration App — Pre-Launch Checklist | system-design websockets crdt realtime collaboration checklist |
coming soon |
| Composite Indexes — The Multi-Column Index Trap | databases indexes composite-indexes b-tree query-optimization interview |
coming soon |
| Designing Google Drive | system-design file-storage blob-storage pre-signed-urls azure aws interview |
coming soon |
| Agent Harness — The Deterministic Layer Around Your LLM | ai-engineering agents agent-harness claude-code reliability production interview |
coming soon |
| Single Sign-On (SSO) | auth sso system-design security jwt saml oidc interview |
coming soon |
| Designing Netflix's Continue Watching | system-design databases nosql cosmos-db partitioning netflix interview |
coming soon |
| API Gateway Authentication | system-design auth security api-gateway jwt interview |
coming soon |
| Point-to-Site vs Site-to-Site VPN | networking vpn security ipsec system-design interview |
coming soon |
| HTTP vs HTTPS | networking security https tls web interview |
coming soon |
| Authentication vs Authorization | auth security authz authn idor interview |
coming soon |
| SQL Injection | security databases sql sql-injection owasp interview |
coming soon |
| Elasticsearch — The Autocomplete AHA Moment | elasticsearch search inverted-index system-design autocomplete interview |
coming soon |
| Project Scaffolding CLIs | cli scaffolding productivity tooling claude-code |
coming soon |
| Sharing localhost | networking tunneling ngrok deployment devops interview |
coming soon |
| Port Forwarding | networking nat port-forwarding cgnat tunneling interview |
coming soon |
| Learn to Code from Scratch — The 2026 Developer Blueprint | roadmap python beginner ai-engineering dsa git |
coming soon |
Working FastAPI projects you can clone and run. Each one teaches one production-grade concept by building it.
| Project | Tags | Video |
|---|---|---|
| Measure API Request Time | fastapi middleware performance interview |
coming soon |
| Rate Limiting | fastapi rate-limiting slowapi security interview |
coming soon |
| Add Real-Time Voice to a RAG Web App | fastapi react voice elevenlabs rag websockets interview |
coming soon |
Interview-grade DSA topics, framed around the questions you'll actually be asked.
| Topic | Tags | Video |
|---|---|---|
| Big O Notation | dsa big-o complexity interview |
Watch |
How I actually use Claude Code day-to-day — the commands, shortcuts, and workflow tips that compound.
| Topic | Tags |
|---|---|
| Favourite Claude Code Commands | claude-code productivity tooling |