DEV Community: Rohit Raj

Why Your MVP Should Cost Under $10,000 — And How to Make It Happen

Rohit Raj — Sat, 05 Sep 2026 04:21:55 +0000

Most MVPs are overbuilt and overpriced. Here is how to scope, build, and launch a real product for under $10K — with examples from projects I have shipped.

Read the full version with code samples, diagrams, and architecture details: Why Your MVP Should Cost Under $10,000 — And How to Make It Happen

More engineering notes: rohitraj.tech/notes

WhatsApp Business API Integration Guide for Indian Startups

Rohit Raj — Sat, 05 Sep 2026 04:21:33 +0000

A practical guide to integrating WhatsApp Business API for Indian startups — providers, costs, message templates, and building automated bots that actually convert.

Read the full version with code samples, diagrams, and architecture details: WhatsApp Business API Integration Guide for Indian Startups

More engineering notes: rohitraj.tech/notes

What a $15K MVP Actually Includes — vs. the $50K Agency Quote You Just Got

Rohit Raj — Sat, 05 Sep 2026 04:21:12 +0000

A $15K-$30K fixed-price MVP and a $50K-$100K agency quote ship the same thing 80% of the time. The difference is who absorbs the markup. Here is the line-item breakdown — what is in scope, what is overhead, and where the agency margin actually comes from.

Read the full version with code samples, diagrams, and architecture details: What a $15K MVP Actually Includes — vs. the $50K Agency Quote You Just Got

More engineering notes: rohitraj.tech/notes

Vibe Coding vs Hiring a Developer — When Lovable, Bolt, and Cursor Stop Being Enough

Rohit Raj — Sat, 05 Sep 2026 04:20:51 +0000

Vibe coding ships prototypes in 2.4 days. Then the 500-user wall hits — auth bugs, payment edges, DB drift. The honest handoff playbook from AI tool to human engineer.

Read the full version with code samples, diagrams, and architecture details: Vibe Coding vs Hiring a Developer — When Lovable, Bolt, and Cursor Stop Being Enough

More engineering notes: rohitraj.tech/notes

₹805 Crore Lost to UPI Fraud This Year. I Built an Offline Scam Detector That Needs Zero Internet.

Rohit Raj — Sat, 05 Sep 2026 04:20:30 +0000

1 in 5 Indian families have been hit by UPI fraud. 51% never report it. Cloud-based scam checkers need internet — exactly what victims in Tier 2/3 India don't have. Here's why I built ScamRakshak with zero network permissions.

Read the full version with code samples, diagrams, and architecture details: ₹805 Crore Lost to UPI Fraud This Year. I Built an Offline Scam Detector That Needs Zero Internet.

More engineering notes: rohitraj.tech/notes

Your Supabase RLS Just Leaked Production Data — The 5 Bugs Every Vibe-Coded App Hits in 2026

Rohit Raj — Sat, 05 Sep 2026 04:20:08 +0000

Supabase row-level security is opt-in, silent when wrong, and tested with a superuser token that bypasses everything. In January 2025, 170+ Lovable apps leaked their production databases because nobody enabled RLS. Here are the 5 RLS bugs every vibe-coded app ships, and the audit pattern a senior engineer runs to catch them before user 500.

Read the full version with code samples, diagrams, and architecture details: Your Supabase RLS Just Leaked Production Data — The 5 Bugs Every Vibe-Coded App Hits in 2026

More engineering notes: rohitraj.tech/notes

Spring Boot vs Node.js for Your Startup Backend (2026)

Rohit Raj — Sat, 05 Sep 2026 04:19:48 +0000

An honest comparison of Spring Boot and Node.js for startup backends — performance, hiring, ecosystem, and when each one actually makes sense.

Read the full version with code samples, diagrams, and architecture details: Spring Boot vs Node.js for Your Startup Backend (2026)

More engineering notes: rohitraj.tech/notes

Retool vs Custom Internal Tool in 2026 — When to Buy, When to Build, When to Hire

Rohit Raj — Sat, 05 Sep 2026 04:19:26 +0000

Retool wins for the first 18 months. Custom wins after $20K in seat licenses or when the workflow stops fitting tables and forms. Honest 2026 numbers from a senior engineer who builds both.

Read the full version with code samples, diagrams, and architecture details: Retool vs Custom Internal Tool in 2026 — When to Buy, When to Build, When to Hire

More engineering notes: rohitraj.tech/notes

React Native vs Flutter in 2026: Which One for Your App?

Rohit Raj — Sat, 05 Sep 2026 04:19:05 +0000

A practical comparison of React Native and Flutter in 2026 — performance, ecosystem, hiring, and which one I recommend based on your specific situation.

Read the full version with code samples, diagrams, and architecture details: React Native vs Flutter in 2026: Which One for Your App?

More engineering notes: rohitraj.tech/notes

Offline-First PWA Patterns — Service Workers, IndexedDB, and Background Sync

Rohit Raj — Sat, 05 Sep 2026 04:18:43 +0000

Service workers, IndexedDB, and background sync patterns used in MicroItinerary for reliable offline-first travel planning.

Read the full version with code samples, diagrams, and architecture details: Offline-First PWA Patterns — Service Workers, IndexedDB, and Background Sync

More engineering notes: rohitraj.tech/notes

PostgreSQL vs MongoDB: Which Database for Your Startup? (2026)

Rohit Raj — Sat, 05 Sep 2026 04:18:22 +0000

A practical comparison of PostgreSQL and MongoDB for startups — when to use each, real performance numbers, and why most startups should just pick Postgres.

Read the full version with code samples, diagrams, and architecture details: PostgreSQL vs MongoDB: Which Database for Your Startup? (2026)

More engineering notes: rohitraj.tech/notes

Microservices vs Monolith for Startups: Stop Overengineering

Rohit Raj — Sat, 05 Sep 2026 04:18:01 +0000

Why your startup should start with a monolith, when microservices actually make sense, and how to avoid the architecture astronaut trap.

Read the full version with code samples, diagrams, and architecture details: Microservices vs Monolith for Startups: Stop Overengineering

More engineering notes: rohitraj.tech/notes