Smooth Backend Migration from Java to Node.js

Challenge

A backend developer was assigned to a new microservice written in Node.js and Express. They had strong Java/Spring experience but limited Node.js exposure and needed to ship features without delaying the team.

Solution

• Structured walkthrough of Node.js and Express patterns compared to Spring
• API design and database layer (MongoDB) with best practices
• Debugging and testing (Jest) so they could work independently

Results

• Delivered first feature within 2 weeks
• Became the go-to person for that service within 2 months
• Transitioned to full-time Node.js role on the team