System Design: A Real-Time Collaborative Task Board
A real-time collaborative app system design for a task board: data model, fractional indexing, WebSockets, fan-out, conflicts, presence and reconnects.
BlogUpdated Oct 4, 2026
Notes on building
software that lasts.
Practical writing on system design, databases, web performance, machine learning and technical interviews.
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Cross-Modal Search: Aligning Images and Text with Dual Encoders
A practical guide to cross-modal retrieval with dual encoders: CLIP-style contrastive training in PyTorch, Recall@K evaluation, and FAISS search at scale.
7 min read
Fixing Core Web Vitals in React and Next.js
A practical guide to Core Web Vitals in Next.js: measure LCP, INP and CLS from real users, load the hero image correctly, cut hydration and stop layout shifts.
8 min read
PostgreSQL Indexing: A Practical Guide for App Developers
A practical guide to PostgreSQL indexing for app developers: read EXPLAIN plans, order composite columns, and use covering, partial, GIN and BRIN indexes.
7 min read
Technical SEO in the Next.js App Router
A practical Next.js SEO guide for the App Router: server rendering, the Metadata API, canonical URLs, OG images, sitemaps, robots.txt and safe JSON-LD.
7 min read
What Interviewers Actually Look For in a Coding Interview
Coding interview tips from the interviewer's side: the signals we score, a 45-minute round plan, a worked sliding-window problem and red flags to avoid.
8 min read
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