Engineering Notes
Practical articles on scalable full-stack development, SaaS architecture, AI engineering, and cross-platform mobile — by Rohan Shrestha.
FeaturedBuilding Scalable Next.js 15 Applications: Architecture Patterns That Actually Work
A practical guide to scalable Next.js 15 architecture — App Router, React Server Components, caching, and folder structure patterns for production apps.
Multi-Tenant SaaS Architecture: A Practical Guide for Founders and Engineers
How to design multi-tenant SaaS the right way — tenant isolation strategies, database patterns, row-level security, and pricing-aware architecture decisions.
Integrating AI Into Web Applications: RAG, LLMs, and Practical Patterns for 2026
A hands-on guide to adding AI features to web apps — LLM integration, retrieval-augmented generation (RAG), streaming responses, cost control, and safety.
Flutter vs React Native in 2026: Choosing the Right Cross-Platform Stack
An engineer's comparison of Flutter and React Native in 2026 — performance, developer experience, ecosystem, and how to choose the right cross-platform framework.