Paul Henry Atienza

Paul Henry Atienza

📍 Japan · 🇵🇭 From the Philippines · 🇯🇵 JLPT N3

Senior Software Engineer

Enterprise Systems · 10+ Years · Japan

Senior software engineer based in Japan with 10+ years in enterprise systems across automotive and manufacturing. Expanding into data and AI engineering.

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About

I'm a software engineer from the Philippines, currently based in Japan. I studied Computer Science at the University of the Philippines and have been building enterprise systems professionally since 2014 — primarily in the automotive and manufacturing space. Alongside my main role, I freelance building websites for therapists and mental health professionals in the US. I'm currently expanding into data and AI engineering and writing about the journey on this blog.

🇯🇵 JLPT N3 — Japanese Language Proficiency

Certified 2021. Working in a Japanese enterprise environment made learning the language both practical and personally rewarding.

Experience

Advanced World Solutions, Inc.

10+ years
Senior Software Engineer — 2014 – Present · Japan

Developing and maintaining large-scale enterprise systems in automotive and manufacturing, supporting web, batch, and integration workflows across legacy and modernized environments.

Enterprise System Modernization & Maintenance

  • Maintained and enhanced enterprise applications built on legacy RPG/WebFacing architecture, supporting gradual modernization into Java-based web systems.
  • Developed and maintained web applications using Java and JSP on enterprise application servers.
  • Implemented business logic for leasing, contracts, and customer workflows in automotive systems.
  • Developed XML-based report layouts with dynamic data injection using SVF for enterprise document generation.
  • Performed integration testing and validation of RESTful and SOAP-based web services.

High-Volume Batch Optimization

  • Optimized batch processing handling 600,000+ records, improving execution time and reducing memory consumption through query tuning and Lazy Loading patterns.

Build & Release Engineering

  • Managed build automation with Apache Ant and Jenkins across development, QA, and production environments.
  • Maintained Git-based version control and coordinated stable production releases.

Skills

Backend & Enterprise

JavaJSPServletsDB2OracleBatch Processing

Frontend & Web

JavaScriptHTMLCSS

DevOps & Tools

GitJenkinsCI/CDLinuxShell Scripting

Data & AI (Expanding)

PythonSQLData Analysis

Languages

Japanese (JLPT N3)English (Professional)

Certifications

Technical

Oracle

Oracle Certified Associate, Java SE 8 Programmer

2018

View Credential →
ITPEC

PhilNITS Fundamental Information Technology Engineer (FE)

2014

Python

PCEP™ – Certified Entry-Level Python Programmer

2022

View Credential →
JavaScript

JSA – Certified Associate JavaScript Programmer

2022

View Credential →
JLPT

Language Certification

Japanese Language Proficiency Test N3

2021

Studied and passed in 2021. My work involves Japanese enterprise clients — working in Japan made it both practical and personally rewarding.

Freelance: Websites for Therapists

I found a niche I care about — helping mental health professionals have an online presence as warm as they are.

Active · US Market

Websites for Therapists & Counselors

I design and build warm, professional websites for therapists and mental health professionals in the US — handling domain, hosting, and deployment so they can focus on their clients. No templates, no page builders. Designed and coded from scratch so the site actually fits the person.

Next.jsTailwind CSSVercelFull-stack

Contact

Open to technical collaboration, enterprise work, and freelance opportunities. Feel free to reach out.

Get in touch

atienzapaulhenry@gmail.comLinkedIn ↗GitHub ↗