Sai Yan Naing · Full-stack software engineer

Every detail matters.

Especially the ones you

Summary

I'm Sai Yan Naing (Leon), a full-stack software engineer focused on secure, maintainable systems and thoughtful interfaces. I care about making complex tools clear and useful for the people who rely on them.

My Journey.

From self-taught beginnings to production applications, every step has shaped how I learn, build, and create meaningful experiences for the people who use my work.

Chapter 01 · THE BEGINNING

2022–2023

Curiosity became a passion.

Self-directed learning

When my university journey was disrupted by the coup, I continued learning programming independently through Google, YouTube, and documentation. I turned curiosity into skills and took my first steps toward becoming a software engineer.

GoogleYouTubeDocumentation

Chapter 02 · OCT

2023

From Learning to Building

Frontend Engineer — Better HR

Turned self-taught knowledge into real-world experience, building production web and mobile applications and solving real engineering challenges.

Chapter 03

2024

Building Real-World Systems

From UI to business logic

Worked on essential HR workflows, including employee management, payroll, approval processes, and single sign-on authentication.

HR systemsAuthenticationState management

Chapter 04

2025

Scaling for Real Users

Performance & reliability

Contributed to a cross-platform HR application serving over 50,000 daily active users, with a focus on performance, real-time features, and application security.

PusherPerformanceSecurity

Chapter 05 · EARLY

2026

Taking Ownership

Production & release management

Expanded responsibility across mobile development, OTA updates, build configuration, testing, and production delivery for Android and iOS.

Expo EASOTA updatesMobile releases

Chapter 06 · MAY — PRESENT

2026

A New Chapter

Software Engineer — ACE Data Systems Ltd

Took ownership of an HR mobile application, covering React Native development, UI design, API integration, architecture, and independent store-release processes.

UI designArchitectureApp publishing

The next chapter

Still building.

Every experience adds another perspective to what comes next.

Selected work