Behind the Tech: How We Migrated Our Entire Stack in 48 Hours 🚀
I'll be honest: I was dreading this week.
If you've ever looked at a production codebase and realized you're running NestJS 7 and AWS SDK v2, you know that sinking feeling. You are staring at breaking changes, dependency conflicts, and potential downtime.
I mentally prepared for weeks of migration hell. Instead, it took 2 days.
I wanted to share exactly how I pulled this off—it's the same philosophy behind every tool on MTKits.
The "Nightmare" Stack
The mission was to bring everything up to modern standards:
- AWS SDK v2 → v3: A complete shift to modular architecture.
- NestJS 7 → NestJS 11: Four major versions of architectural evolution.
- TypeORM: Dealing with the domino effect of library updates.
- Production Fixes: Keeping the deployment pipeline green.
The Secret Sauce: Codex + ChatGPT 5.1
The speed-up wasn't just AI—it was AI done right. I used Codex with ChatGPT 5.1 as a specialist assistant.
- Boilerplate heavy-lifting: Converting AWS calls to the Command pattern.
- Pattern validation: Spotting updated NestJS decorator best practices instantly.
- Type safety: Navigating TypeORM type mismatches without hours of trial and error.
Why This Matters for MTKits
We ship tools fast—whether it's our JSON utilities or JWT debuggers—because practicality beats complexity. This migration proved AI amplifies a developer's judgment rather than replacing it.
The Lesson: Stop Watching, Start Building
If you've only used AI for simple how-to questions, you're leaving speed and quality on the table. This is how we keep MTKits modern and useful.
I wrote a deeper dive on Dev.to—read the full journey here.
Happy coding,
Khurram