Looking for a job

Nguyen Thien

@nguyenthien

Message

Software engineer at ByteHR building and optimizing HR, attendance, and mobile application APIs.

Vietnam

Message

What I'm looking for

I’m interested in system architecture, performance optimization, and database management. I want to build high-performance, secure, and scalable web applications while maintaining high code quality and contributing to an organization’s long-term growth.

At ByteHR Co., Ltd., I develop backend APIs for HR, attendance, and mobile applications using ASP.NET Core Web API. I optimized database queries and business logic, reducing API response time by approximately 40%.

At Hanwha Life Vietnam, I designed and developed backend systems for insurance applications using .NET and Oracle. I also optimized Oracle queries and business workflows and deployed applications across DEV, UAT, and PRD environments using Docker Compose.

On my ZKTeco Attendance Device Synchronization System project, I developed a service for synchronizing user data and time zone configurations across attendance devices. I automated synchronization with Quartz.NET Scheduler and background jobs, reducing manual operations by approximately 90%.

Experience

Work history, roles, and key accomplishments

Current

Developer

Current

ByteHR Co., Ltd.

Sep 2025 - Present (1 year 1 month)

Develop and optimize backend APIs for HR, attendance, and mobile applications using ASP.NET Core Web API and Angular Frontend. Optimize database queries and business logic, reducing API response time by approximately 40%.

.NET Core Web API Angular Database Optimization Unit Testing Clean Code Code Review Performance Optimization

Senior Executive

Hanwha Life Vietnam

Dec 2022 - Jun 2025 (2 years 6 months)

Designed and developed backend systems for insurance applications using .NET and Oracle. Optimized Oracle queries and business workflows to ensure stable system performance.

.NET Oracle ASP.NET Java Web APIs Docker Compose Database Design System Architecture Query Optimization

Application Development Specialist

Asia Commercial Bank (ACB)

Jul 2022 - Dec 2022 (5 months)

Developed and maintained applications using .NET and Java. Performed data analysis and database design using Oracle.

.NET Java Oracle Data Analysis Database Design Technical Specifications System Architecture Testing Debugging

Application Developer

Eximbank Ho Chi Minh City

May 2021 - Jul 2022 (1 year 2 months)

Maintained, developed, and optimized assigned applications using Oracle, SQL/PLSQL, PowerBuilder, iReport, Pro*C, and Java. Ensured applications operated continuously, reliably, and securely in production environments.

Oracle SQL Pl SQL PowerBuilder IReport Pro*C Java Production Support EOD Operations

Software Implementation Developer

Cybersoft Ho Chi Minh City

Apr 2020 - Dec 2020 (8 months)

Gathered and analyzed customer requirements and developed business applications using C# (.NET) and SQL Server. Supported management of accounting, business service, and customer service data.

C#.NET SQL Server Requirements Analysis Business Applications Data Management

Education

Degrees, certifications, and relevant coursework

Industrial University of Ho Chi Minh City

Bachelor of Engineering, Software Engineering

2016 - 2020

Grade: Good

Activities and societies: Participated in sports and extracurricular activities, particularly football, developing teamwork and maintaining physical fitness. Awarded the 'Five-Good Student' title for two consecutive years (2018–2019), recognizing achievements in academic performance, ethics, volunteering, social integration, and physical fitness.

Pursued a degree in Software Engineering and graduated with a Good rating.