Node.js Backend Refactor Case Studies
Real Clearview engagements where a Node.js or TypeScript backendhad grown teeth and needed a careful, no-downtime refactor —splitting a 1,300-line user.service.ts into four responsibility-tagged NestJS sub-services behind a stable facade, taking aTypeORM 0.3 → 1.0 major upgrade through production without adropped request, and the migrations that thread through a livesystem without a maintenance window. Each post is buyer-shaped:what the code looked like, what we shipped, and what it takes torun the same on yours.
- Essays
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- First filed
- Aug 2026
- Latest
- Aug 2026
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Splitting a Mega-Service Into Four: The Service-Facade Refactor (Plus a Reusable Skill)
Splitting a 1,307-line `user.service.ts` into four NestJS sub-services behind a stable facade — no caller broke.
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Upgrading TypeORM 0.3 to 1.0 in Production: A NestJS Case Study
TypeORM 0.3 → 1.0 major upgrade shipped to a live production API without a single dropped request.
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