Wandi Ong

01

About

Based in Penang, Malaysia, I'm a software engineer who thrives at the intersection of technical leadership and hands-on development. With experience spanning world-class semiconductor fabs to fintech startups, I bring adaptability and depth to every engagement.

I believe in coaching over commanding — mentoring teams, establishing robust CI/CD pipelines, and delivering systems that scale. Whether it's migrating legacy Java MES to modern .NET/Angular stacks or fine-tuning internal LLMs, I focus on measurable impact.

.NET / C# 95%

Angular / TypeScript 88%

Azure / Cloud 85%

SQL Server / PostgreSQL 82%

Team Leadership 90%

02

Experience

Senior Developer

@ Renesas Electronics

AUG 2025 — PRESENT · Penang, Malaysia

Migrated legacy Java MES to .NET + Angular — 20% performance gain
Built CI/CD pipeline for Azure Services — 20% faster deployments
Fine-tuned internal LLM on proprietary codebase — 15% productivity boost

Senior .NET Developer

@ Siemens Digital Industries

NOV 2024 — JUL 2025 · Penang, Malaysia

Data sanitation in C# for MES — 40% reduction in validation overhead
Opcenter Execution bug fixes — 10% fewer support cases
SSO Login via Mendix Marketplace — 20% faster login

Technical Lead & Senior Developer

@ Jesselton Capital

JAN 2024 — JUL 2024 · Batam, Indonesia (Remote)

AWS → Azure migration — 20% cost reduction
Trained team of 4 on ASP.NET Core APIs — 10% faster delivery
Led digital bank app development — 10% less dev time

Technical Lead & Co-Founder

@ PT Rumah Solusi Bersama

JAN 2022 — DEC 2023 · Batam, Indonesia

Backend API for game dev using DDD — 25% faster dev speed
Mentored team of 6 on Unity + C# — 30% fewer bugs
VB6 app support & troubleshooting — 10% faster resolution

.NET Developer

@ PT Global Intra Talenta

FEB 2020 — DEC 2021 · Batam, Indonesia

VB6 → .NET Core migration — 15% API performance gain
On-prem → Azure App Service — 20% less implementation effort

Earlier Roles

2015 — 2019

Onebyone Digital · PT. Celindo Pratama · Dreamsmart Solutions

AWS EC2 warehouse management migration
Bootstrap → React.JS + Laravel API transformation
Offline MES architecture — 60% hardware cost savings
Angular 1.0 reporting engine & Node.JS backend

03

Projects

Grand Poker API

2022 — 2023

RESTful API managing gameplay data for Grand Poker. Built with .NET 6.0 and SQL Server 2022, hosted on Azure App Service with a 20% API performance improvement over on-premise.

.NET 6.0 SQL Server Azure

Gatsu Medika App

2022 — 2025

One-stop health tech solution for Gatsu Medika Batam: lab data collection, health screening reports, and patient queue management. Increased queue efficiency by 30%.

Health Tech Full Stack Queue Mgmt

04

Tech Stack

Backend

C# .NET Core .NET Framework ASP.NET Node.JS Laravel

Frontend

Angular React.JS Bootstrap DevExpress WPF

Database

SQL Server PostgreSQL MongoDB Oracle

Cloud & DevOps

Azure AWS CI/CD Azure DevOps Docker

Low-Code & Tools

Mendix FlutterFlow Unity Engine Git

Industry

Semiconductor Manufacturing Health Tech Finance MES

05

Education

Computer Science — Software Engineering

Universitas Universal

AUG 2018 — AUG 2023

RAD methodology thesis — 15% faster proof of concept
React.js thesis research — 20% faster delivery
3rd place Base Incubator Batam · Top 10 Plug & Play · Top 150 Grab Thinkubator

06

Get In Touch

Open to opportunities and collaborations. Whether you need a senior engineer, a tech lead, or a co-builder — let's connect.

Email LinkedIn GitHub Website

+628996575535

王歷