Looking for a job

Kaung Sett Hein

@kevin_hein

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I build scalable full-stack web applications and microservices with Java, C#/.NET, React, and Vue.

Thailand

Message

What I'm looking for

I'm looking to build scalable web applications and backend services where I can contribute across React, Java, .NET, APIs, databases, testing, and CI/CD while continuing to grow in a collaborative engineering team.

Full-Stack Engineer with 4+ years of experience building scalable web applications and backend services using React, Vue.js, TypeScript, Java (Quarkus, Spring Boot), C#, ASP.NET Core, REST APIs, and PostgreSQL. Experienced in developing responsive user interfaces, Java microservices, database optimization, automated testing, and CI/CD pipelines. Delivered SaaS, industrial, and B2B applications across remote and international development environments.

Experience

Work history, roles, and key accomplishments

Backend Developer

Phinion

Nov 2024 - Nov 2025 (1 year)

Built Java (Quarkus) microservices using Hibernate/JPA, PostgreSQL, and REST integrations with Microsoft Graph, Twilio & SMTP. Optimized PostgreSQL queries with CTEs and applied design patterns across service layers. TDD with JUnit 5/Mockito and maintained Docker, Maven, GitLab CI/CD workflows on Linux. Integrated and used AI tools (Claude, OpenAI) to accelerate development and debugging.

Java Quarkus Microservices PostgreSQL Microsoft Graph Twilio SMTP Junit Mockito Docker Maven AI Tools Hibernate JPA REST APIs Microsoft Graph API Test Driven Development JUnit5 Git GitLab CI CD Linux OpenAI

Backend Developer

Technopro Engineering

Feb 2023 - May 2024 (1 year 3 months)

Improved React/TypeScript frontend components working with Java Spring Boot backend services, resolving API data issues and stabilizing reporting features. Validated and corrected MySQL data, reducing recurring inconsistencies by ~15%. Used AI-assisted tools to accelerate debugging and improve ticket resolution across frontend and backend tasks.

Java React TypeScript MySQL Backend Development Spring Boot

Software Developer

Technopro Engineering

Feb 2023 - May 2024 (1 year 3 months)

Debugged and improved React/TypeScript frontend components interacting with Java Spring Boot backend services, resolving API data issues and stabilizing reporting features. Validated and corrected MySQL data to reduce recurring data inconsistencies by ~15%.

React TypeScript Java Spring Boot MySQL Debugging AI Tools

Full Stack Developer

Fusion Solution Co., Ltd

Jul 2020 - Aug 2022 (2 years 1 month)

Built Vue.js, JavaScript, and Vuetify interfaces across three B2B applications, improving engagement by 25%. Developed RESTful APIs with ASP.NET Core, EF Core, and MSSQL, improving data retrieval by 20%. Improved quality through unit testing, refactoring, test cases, and manual QA, reducing bugs by 15%. Worked across full-stack features using Git in an agile team.

Vue.Js JavaScript ASP.NET Core EF Core MSSQL REST APIs Unit Testing Refactoring Test case writing Manual Testing Agile Vuetify Git

Internship

Thorium Co., Ltd

Apr 2019 - Jun 2020 (1 year 2 months)

Built responsive user interfaces using React, HTML, CSS, Bootstrap, and JavaScript, contributing to internal applications and the company web portfolio. Supported backend feature development using C#, ASP.NET MVC, .NET Core, MSSQL, and PostgreSQL under senior developer guidance.