Paul Henry Atienza

Paul Henry Atienza

Japan-based · From the Philippines · JLPT N3

Senior Software Engineer

Enterprise Systems · 10+ Years · Japan

Senior software engineer in Japan with 10+ years building enterprise systems for automotive and manufacturing teams. I focus on dependable backend, batch, integration, and modernization work, with a growing practice in data and AI engineering.

View ExperienceAbout MeConnect on LinkedIn

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 build websites for therapists and mental health professionals in the US. I'm also expanding my work into data and AI engineering, with writing moving to blog.paulatienza.dev.

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 to 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)

Projects

Side projects that come from real work and personal roots: tools for investigation, learning, and keeping language knowledge easier to reach.

Live

Learn Regex / Grep Lab

A hands-on learning app for regex through grep-style investigation. I built it from the kind of maintenance, log checking, and technical investigation work where fast pattern matching becomes part of the job.

RegexGrepDeveloper ToolsLearning
Live SiteGitHub

In Progress

Asi Language API

An API experiment for preserving and making Asi, also known as Bantoanon, more accessible digitally. Asi is a Bisayan language of Romblon and part of my own family and cultural background.

APILanguage PreservationRomblonAsi
GitHub

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, and working in Japan made the language practical and personally rewarding.

Freelance: Websites for Therapists

I found a niche I care about: helping mental health professionals build an online presence that feels warm, trustworthy, and professional.

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.comLinkedInGitHub