Design a scalable notification service for SWE system design interviews: architecture, delivery guarantees, provider comparison, and 2026 talking points.
Design a URL shortener end to end: encoding schemes, database choice, caching, and scale math for 2026 system design interviews.
The core tree and graph algorithm patterns tested in 2026 SWE interviews — traversal, shortest path, and union-find, with code.
Trie prefix trees in 2026 interviews: implementation, complexity, autocomplete/spell-check use cases, and when to pick them over hash maps.
Master the two-pointer technique for coding interviews with pattern recognition, complexity proofs, and 2026 interview data.
Serverless cold start optimization in 2026: root causes, provider-specific fixes, and benchmarks across AWS Lambda, Cloudflare Workers, and Vercel.