Tran Trung Hieu, Developer in Tokyo, Japan
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Tran Trung Hieu

Verified Expert  in Engineering

Bio

Tran is an enthusiastic software developer with over six years of experience, including more than five years working in international environments. His versatile skills apply to various industries, such as eCommerce and fintech. Tran has held impactful positions in both large corporations and mid-size startups, demonstrating his ability to lead teams and work independently or as part of a group.

Portfolio

WealthPark
GoLand, MySQL, Domain-driven Design (DDD), Go, Web Development
Human Plus Human Co. Ltd
Spring, Java, JUnit, HTML, CSS, Oracle, HTTP REST, MyBatis, REST APIs, REST, SQL
Rakuten
Node.js, React, Next.js, Java, REST, SQL

Experience

  • MySQL - 5 years
  • Ruby on Rails (RoR) - 5 years
  • Oracle - 4 years
  • Next.js - 2 years
  • React - 2 years
  • GoLand - 2 years
  • Node.js - 2 years
  • Java - 2 years

Availability

Full-time

Preferred Environment

MacOS, Slack, REST, Ruby, SQL

The most amazing...

...thing I've done is lead the release of a US marketplace site for the top eCommerce site in Japan.

Work Experience

Senior Software Engineer

2022 - PRESENT
WealthPark
  • Developed a crowdfunding platform that allows users to invest in alternative assets, including real estate, luxury watches, paintings, and wine.
  • Discussed requirements with the spec team and developed and released features.
  • Released the MVP version, which one big customer is currently using.
Technologies: GoLand, MySQL, Domain-driven Design (DDD), Go, Web Development

Full-stack Java Developer

2024 - 2024
Human Plus Human Co. Ltd
  • Managed to convert several finance reports from the old system to a new system using Java.
  • Tracked, fixed, and improved reports based on feedback from the team, then demoed to clients.
  • Overcame the challenge of time zone and working remotely, communicating with the team to successfully migrate reports and demos to clients.
Technologies: Spring, Java, JUnit, HTML, CSS, Oracle, HTTP REST, MyBatis, REST APIs, REST, SQL

Full-stack Developer

2020 - 2022
Rakuten
  • Developed multiple critical internal tools to empower business employees to work with heavily technical tasks.
  • Built a gross merchandise sales calculation tool and a CMS tool to support the business team uploading content to an eCommerce site and managed the configuration tool.
  • Utilized the tools throughout the corporation, which played an essential role in the working process.
Technologies: Node.js, React, Next.js, Java, REST, SQL

Ruby on Rails Developer

2016 - 2020
Rakuten
  • Acted as the front- and back-end developer for the Rakuten Merchant platform.
  • Discussed requirements with the product manager to develop new features, including coding, writing unit tests, and operating and fixing bugs.
  • Maintained the application with millions of merchants worldwide with global marketplaces. I was in charge of launching and closing down the US marketplace.
Technologies: Ruby on Rails (RoR), Angular, React, REST, Ruby, SQL

Java Developer

2014 - 2016
Nextop co, ltd.
  • Developed a hospital management application that monitors patient history, including medicine and bills.
  • Studied the business logic of an extensive hospital management application. I rewrote the application using Java and MySQL. Provided software as a service (SaaS) using the cloud.
  • Released the minimum viable product (MVP) version, resulting in two mid-size hospitals using the application.
Technologies: Java, Spring, MySQL, Oracle, SQL

Experience

Rakuten Merchant System

Engaged as the front- and back-end developer working on the Rakuten Merchant system. Its platform supports merchants managing their shop with full functionalities, including designing shop pages and managing products and shipping methods.

Education

2010 - 2014

Bachelor's Degree in Computer Science

Hanoi University - Hanoi, Vietnam

2012 - 2013

Bachelor's Degree in Mathematics and Computer Science

Catania University - Catania, Italy

Skills

Libraries/APIs

React, Node.js, MyBatis, REST APIs

Tools

GoLand, Slack, Mathematica

Frameworks

Ruby on Rails (RoR), Next.js, Spring, Angular, JUnit

Paradigms

REST

Storage

MySQL, PostgreSQL

Languages

Java, Ruby, SQL, Eiffel, HTML, CSS, Go

Platforms

Oracle, MacOS

Other

eCommerce, Computer Science, Domain-driven Design (DDD), HTTP REST, Web Development

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