---
title: "Leonie Christina (@leoniechristinaa) | Hashnode"
description: "Building systems by day, breaking them down into words by night. Read the latest articles by Leonie Christina on Hashnode."
url: "https://hashnode.com/@leoniechristinaa"
---

@leoniechristinaa

# Leonie Christina

@leoniechristinaa · Jakarta, Indonesia · Joined April 2026

Building systems by day, breaking them down into words by night.

### [Using Bitmasks for Category Indexing Inside a Reference ID](https://devtofree.hashnode.dev/using-bitmasks-for-category-indexing-inside-a-reference-id?utm_source=hashnode&utm_medium=feed)

The cleaner way to pack multiple categories into a fixed-length ID

6 min read · [devtofree.hashnode.dev](https://devtofree.hashnode.dev/using-bitmasks-for-category-indexing-inside-a-reference-id?utm_source=hashnode&utm_medium=feed)

[Apr 13](https://hashnode.com/posts/using-bitmasks-for-category-indexing-inside-a-reference-id/69dd04edf57346bc1e107f93)