Khant.dev
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Hi, I’m Khant Wai Yan

Software Engineer

Building systems that explain how they work — not just what they do.

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Asia / Bangkok

I build full-stack systems with a backend focus, and document the architecture decisions, tradeoffs, and implementation details behind them.

Project Proof

3case studies

Auth systems, admin workflows, and content-driven apps documented from implementation to tradeoffs.

Available for work

Have a project or role in mind?

Latest Projects

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Building Persona Full Stack Web App
In Progress

Building Persona Full Stack Web App

Refactoring authentication, Improving performance, and Enhancing admin workflows, and Focusing on clarity and scalability.

+5 more
Building HT Ecommerce Full Stack Web App
Maintaining

Building HT Ecommerce Full Stack Web App

Designing a blog-first portfolio using Next.js, MDX, and a structured content system focused on clarity and system thinking.

+10 more
Building Persona Full Stack Web App
In Progress

Building Persona Full Stack Web App

Refactoring authentication, Improving performance, and Enhancing admin workflows, and Focusing on clarity and scalability.

+5 more

Latest Writing

Short notes on architecture, implementation details, and the decisions behind the systems I build.

All Writing

Engineering Focus

The technical areas I return to most often and the principles behind how I approach them.

01

Backend Architecture

I start with constraints, data flow, and failure paths before choosing implementation details.

02

Authentication & Sessions

I focus on secure auth flows, refresh token handling, session state, and abuse-resistant behavior.

03

Admin & Operational Workflows

I build tools that make real systems easier to inspect, manage, and recover.

04

Clarity in Tradeoffs

I document why decisions were made, what was rejected, and what the system optimizes for.

Skills

Tools and technologies I use to build full-stack systems with a focus on backend architecture and scalability.

Backend

Node.js
Bun.js
JavaScript
TypeScript
Express.js
Python
Puppeteer
Cheerio
MongoDB
PostgreSQL
Redis
JWT
OAuth

Frontend

Vite
React
Next.js
Tailwind CSS
Shadcn
Axios
Three.js
Jest

Infra

Docker
Atlas
Neon
Vercel
Railway
Hostinger
Cloudinary
Stripe

Practices

System Design
API Design
Authentication
Performance

Engineering Journey

A short timeline of my experience and how I got here.

Current Focus

July 2025 - Present

Production Systems

Freelance Software Engineer

MERNTypeScriptRedisCloudinary

E-commerce platform with admin dashboard

Building a production-focused commerce system with customer flows, admin operations, payment review, automation, and deployment ownership.

This project helped me connect backend architecture, authentication, admin workflows, deployment, and security into one real-world system.

Key Works

  • Built commerce workflows for inventory, order administration, delivery fee calculation, and product classification.
  • Implemented QR-based manual payment verification with proof uploads, admin review, resubmission requests, refunds, and cancellations.
  • Delivered secure auth with HttpOnly JWT cookies, refresh token rotation, Google OAuth, RBAC, Brevo email verification, and password reset flows.
  • Added SSE exchange-rate updates, product scraping for 100+ items from 3 brands, Cloudinary media storage, backend protections, and VPS deployment.

Client Operations

August 2024 - Present

Internal Tools

Freelance Software Engineer

MERNTypeScriptJWTCharts

Fleet management and expense tracking system

Developing an internal operations system for a taxi service business managing around 20 vehicles.

This work strengthened how I model real business workflows, protect owner-only modules, and turn operational data into useful dashboards.

Key Works

  • Centralized driver records, vehicle tracking, expense management, license expiration notifications, and repair scheduling.
  • Implemented authentication and role-based authorization for owner-only financial and operations modules.
  • Built responsive dashboards and reports to improve financial visibility and daily fleet management workflows.

Freelance Start

April 2023 - August 2023

Business Websites

Freelance Web Developer

Next.jsTypeScriptTailwind CSS

Websites for local computer shops

Designed, developed, and deployed responsive business websites for two local computer shops in Myanmar.

These projects helped me practice translating business needs into clear frontend structure, readable content, and practical deployment decisions.

Key Works

  • Translated business requirements into clear frontend experiences for local customers.
  • Improved online visibility and accessibility with responsive layouts and practical content structure.

First Engineering Role

September 2022 - February 2023

Backend Systems

Junior Software Engineer

Spring BootOracle SQLREST APIs

MPT (Myanmar Posts and Telecommunications)

Worked on internal financial tracking features and backend integrations in a production engineering environment.

This role gave me early exposure to production code, backend debugging, database performance, and cross-team delivery habits.

Key Works

  • Developed Spring Boot API features that helped streamline financial data workflows and reduce manual reporting time by 30%.
  • Optimized Oracle SQL queries, improving data retrieval performance by 25% and supporting more accurate financial reporting.
  • Collaborated on backend testing, debugging, API integration, and issue resolution to improve application stability.

Foundation

Before

Learning Core Skills

Software Engineering Student

HTMLCSSJavaScriptJava

University and self-study

Built the fundamentals across frontend, backend, programming languages, and problem solving before moving into production projects.

This period shaped my interest in full-stack engineering and gave me the base to understand both UI implementation and backend logic.

Key Works

  • Learned core web development through HTML, CSS, and JavaScript.
  • Practiced backend and object-oriented programming with Java, C#, and Python.
  • Built early projects that helped me move from syntax practice toward real application structure.

Get in touch

If you are interested in working together or have any questions, feel free to reach out. I am always open to discussing new opportunities and ideas.

khantwaiyan11@gmail.com
Asia / Bangkok
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