About Me

Building Powerful Systems

Passionate about creating scalable, efficient solutions

I'm a full-stack developer with over 7 years of experience building web applications, APIs and mobile apps, mainly with C# and ASP.NET Core. I currently work as a Senior Backend Developer at REZERV, a Singapore-based SaaS booking platform, where I build and maintain backend services.

Before that, I worked as an Assistant Lead and led a team of up to 5 members, covering everything from database design to operations on Microsoft Azure.

Outside work, I am building ZeyoLearn, a multilingual language-learning app, on my own, from the API and database to the mobile app and admin panel. I have also built and published more than 20 small web apps on this site.

I enjoy learning new technologies, and I care about clean, maintainable code and stable systems.

ZW

Contact Info

Tokyo, Japan
+81 70-9310-1776
official.zeyarwinthu@gmail.com
Experience

Professional Journey

Over 7 years of hands-on development experience

Senior Backend Developer

REZERV Co., Ltd – Singapore (Full remote)
  • Develop and maintain backend services for rezerv.co, a SaaS booking platform, using C#, ASP.NET Core (.NET 6) and Entity Framework
  • Process background jobs with Hangfire
  • Use Redlock for distributed locking to keep data consistent
  • Use AutoMapper for object mapping and Log4Net for logging
  • Monitor performance and logs with AWS CloudWatch

Senior .NET Developer

UNIFINE Co., Ltd – Myanmar
  • Built web applications with Angular and APIs with .NET Core
  • Integrated third-party services such as OneSignal and Google APIs
  • Maintained Windows Server 2019

Assistant Lead

THETYS Co., Ltd – Myanmar (HQ: Thailand)
  • Promoted from Web Developer after one year
  • Led a team of up to 5 members on two projects, through the full development cycle from requirements to operations
  • Analyzed requirements and assigned tasks to team members
  • Designed databases and built REST APIs (Repository pattern)
  • Developed mobile apps with Xamarin
  • Managed App Services and databases on Microsoft Azure

Web Developer

THETYS Co., Ltd – Myanmar (HQ: Thailand)
  • Built websites with ASP.NET MVC5, Vue.js, HTML5, CSS3 and JavaScript
  • Built Web APIs with .NET Core, Entity Framework Core and LINQ
  • Worked on 5 software projects
Projects

Personal Projects

ZeyoLearn

Founder & Sole Developer
In beta testing

A multilingual language-learning app that supports 11 languages, built for Burmese speakers first.

  • REST API with ASP.NET Core (.NET 9), MySQL and Redis caching
  • Separate worker service with Hangfire for background and scheduled jobs
  • Mobile app with Flutter and admin panel with Angular
  • Sign in with Apple with server-side token verification
  • Unit tests with xUnit
  • Deployed on Railway, with Cloudflare R2 for file storage
C# ASP.NET Core MySQL Redis Hangfire Flutter Angular Firebase xUnit
Skills & Expertise

Technical Arsenal

Technologies I work with daily

Backend Development

C# ASP.NET Core ASP.NET MVC5 .NET Framework Entity Framework Core LINQ REST APIs

Databases

SQL Server MySQL Redis

Cloud & DevOps

Microsoft Azure AWS (CloudWatch) Railway Windows Server Git

Tools & Libraries

Hangfire Redlock Log4Net AutoMapper Firebase OneSignal

Testing

xUnit (unit testing)

Frontend Technologies

HTML5 CSS3 JavaScript Vue.js Angular

Mobile Development

Flutter Xamarin

Practices

Repository Pattern REST API design Agile

Other

Java / Spring Boot (university project)
Education

Academic Background

Bachelor of Computer Science (B.C.Sc)

University of Computer Studies, Monywa

TOEIC Listening & Reading Test

English Proficiency Certificate

JLPT N4 Certificate

Japanese Language Proficiency Test

JLPT N3: Taking the exam in December 2026

Languages

  • English (business level)
  • Japanese (JLPT N4)
  • Burmese (native)

Let's Build Something Amazing

Ready to collaborate? Let's discuss your next project