TanzimTanzim.
The notebook / writing

Thinking
out loud.

Notes & research

Thoughts on engineering, architecture patterns, and lessons learned building at scale. A few things worth sharing along the way.

Fresh from the notebook03 articles
Architecting Zero-Latency Web Applications with Next.js & Optimistic UI
Latest article
Architecture6 min read

Architecting Zero-Latency Web Applications with Next.js & Optimistic UI

How we eliminate perceived lag in distributed fullstack apps using optimistic UI mutations, edge-caching, and predictive prefetching.

Read the story
Mastering MongoDB Indexes for 10M+ Document High-Throughput Queries
Database8 min read

Mastering MongoDB Indexes for 10M+ Document High-Throughput Queries

A practical deep dive into compound indexes, partial filters, and explain-plan analysis to slash query execution times from 850ms to 2ms.

Sep 8, 2026
Building a Private CDN & Storage Pipeline with Cloudflare R2 and Next.js
Cloud5 min read

Building a Private CDN & Storage Pipeline with Cloudflare R2 and Next.js

How to bypass predatory S3 egress fees and deliver global gigabyte media with zero-egress Cloudflare R2 and presigned direct client uploads.

Sep 8, 2026