---
title: "John (@johnkim7) | Hashnode"
description: "Hello, I'm John Kim, mobile & web application developer with 10+ years of expertise."
url: "https://hashnode.com/@johnkim7"
---

@johnkim7

# John

@johnkim7 · Seoul, South Korea · Joined July 2026

### [Advanced Flutter Navigation — Multi-Leaf and Nested Architecture](https://developer-mind.hashnode.dev/advanced-flutter-navigation-multi-leaf-and-nested-architecture?utm_source=hashnode&utm_medium=feed)

Advanced Flutter Navigation — Multi-Leaf and Nested Architecture

9 min read · [developer-mind.hashnode.dev](https://developer-mind.hashnode.dev/advanced-flutter-navigation-multi-leaf-and-nested-architecture?utm_source=hashnode&utm_medium=feed)

[Sep 3](https://hashnode.com/posts/advanced-flutter-navigation-multi-leaf-and-nested-architecture/6a99652339d381a787ee22fb)

### [Custom Drawing in Flutter: From Shapes to Complex Canvas Art](https://developer-mind.hashnode.dev/custom-drawing-in-flutter-from-shapes-to-complex-canvas-art?utm_source=hashnode&utm_medium=feed)

Custom Drawing in Flutter: From Shapes to Complex Canvas Art

9 min read · [developer-mind.hashnode.dev](https://developer-mind.hashnode.dev/custom-drawing-in-flutter-from-shapes-to-complex-canvas-art?utm_source=hashnode&utm_medium=feed)

[Aug 25](https://hashnode.com/posts/custom-drawing-in-flutter-from-shapes-to-complex-canvas-art/6a8d7bdf26c84acf7eb8ed34)

### [Securing Flutter Applications: A Developer's Guide to Preventing Reverse Engineering and Data Breaches](https://developer-mind.hashnode.dev/securing-flutter-applications-a-developer-s-guide-to-preventing-reverse-engineering-and-data-breaches?utm_source=hashnode&utm_medium=feed)

Securing Flutter Applications: A Developer's Guide to Preventing Reverse Engineering and Data Breaches

4 min read · [developer-mind.hashnode.dev](https://developer-mind.hashnode.dev/securing-flutter-applications-a-developer-s-guide-to-preventing-reverse-engineering-and-data-breaches?utm_source=hashnode&utm_medium=feed)

[Aug 18](https://hashnode.com/posts/securing-flutter-applications-a-developer-s-guide-to-preventing-reverse-engineering-and-data-breaches/6a844df8791dd5a7fe65aae9)

### [Flutter DevTools: Profiling and Eliminating Memory Leaks](https://developer-mind.hashnode.dev/flutter-devtools-profiling-and-eliminating-memory-leaks?utm_source=hashnode&utm_medium=feed)

Flutter DevTools: Profiling and Eliminating Memory Leaks

4 min read · [developer-mind.hashnode.dev](https://developer-mind.hashnode.dev/flutter-devtools-profiling-and-eliminating-memory-leaks?utm_source=hashnode&utm_medium=feed)

[Aug 14](https://hashnode.com/posts/flutter-devtools-profiling-and-eliminating-memory-leaks/6a7f0a94cfcc78a180b3b17f)

### [Memory Optimization in Flutter: Best Practices and Practical Guides](https://developer-mind.hashnode.dev/memory-optimization-in-flutter-best-practices-and-practical-guides?utm_source=hashnode&utm_medium=feed)

Mastering Memory Optimization in Flutter: Best Practices and Practical Guides

5 min read · [developer-mind.hashnode.dev](https://developer-mind.hashnode.dev/memory-optimization-in-flutter-best-practices-and-practical-guides?utm_source=hashnode&utm_medium=feed)

[Aug 14](https://hashnode.com/posts/memory-optimization-in-flutter-best-practices-and-practical-guides/6a7f09b37fddaa9948b263ec)