Thomas Sayang
Fullstack Industrial Engineer
Bridging industrial engineering principles with modern software to build systems that actually work.
About Me
The story behind the engineer who builds systems that last.
I'm an Industrial Engineer who learned to code — and never looked back. I've spent the last 5+ years working on factory floors and in front of a terminal, building systems that connect the physical world of manufacturing with modern software.
My edge is that I understand both sides: the engineering fundamentals that make a process actually work, and the software stack to automate, visualize, and optimize it. I'm most energized when a dashboard I built helps a shift supervisor catch a failure before it happens, or when a layout algorithm saves a team weeks of spreadsheet work.
Certifications
Skills
A dual toolkit — industrial engineering fundamentals and modern software.
Industrial Engineering
Software Development
Data & Analytics
Tools & Infrastructure
Projects
Selected work at the intersection of industrial engineering and software.
fullstackReal-Time Production Dashboard
Web application connecting to factory PLCs to visualize OEE, cycle times, and downtime in real time.
fullstackFacility Layout Optimizer
Python-based combinatorial optimization tool that minimizes material handling distance using simulated annealing.
softwarePredictive Maintenance ML Model
Machine learning pipeline that predicts equipment failures 48 hours in advance using sensor time-series data.
fullstackInventory Control Web App
Full-stack ERP-lite application implementing EOQ, reorder points, and ABC classification for a mid-size manufacturer.
Experience
Where I've applied engineering and code in the real world.
Senior Industrial Engineer & Software Developer
PT. Maju Bersama Manufacturing
- Led digital transformation of shop floor reporting, reducing manual data entry by 90% via a real-time Next.js dashboard connected to PLCs.
- Redesigned production layout using SLP methodology, cutting material handling distance by 18% and saving $120K/year.
- Built and deployed a predictive maintenance ML model (91% recall) integrated with the CMMS, reducing unplanned downtime by 35%.
- Managed a cross-functional team of 5 engineers across process optimization and software projects.
Industrial Engineer
Logistik Nusantara
- Conducted value stream mapping across 3 warehouse facilities, identifying $75K in annual waste reduction opportunities.
- Developed a Python-based inventory optimization tool implementing EOQ and reorder-point models for 2,000+ SKUs.
- Implemented SPC charts monitoring 12 critical process parameters, reducing defect rate by 22%.
- Created Power BI dashboards for daily KPI reporting, replacing 15-page weekly Excel reports.
Industrial Engineering Intern
Astra Honda Motor
- Performed time-and-motion studies across 8 assembly stations, identifying 12% cycle time reduction opportunities.
- Supported implementation of 5S program across the stamping department.
- Developed VBA macros automating production reporting, saving 4 hours/week of manual work.
Education
Bachelor of Engineering
Institut Teknologi Bandung (ITB)
- Thesis: Simulation-based optimization of a multi-echelon supply chain using Arena and Python.
- Best Undergraduate Thesis Award — Industrial Engineering Department, 2020.
- Member of IE Student Association; led annual industrial visit to 12 manufacturing sites.
- Relevant coursework: Operations Research, Supply Chain Management, Manufacturing Systems, Statistics, Database Systems.
Professional Certificate
Coursera / Google
- Completed 8-course Google Data Analytics Professional Certificate.
- Capstone project: Analyzed 500K+ rows of manufacturing sensor data to identify failure precursors.
Get in Touch
Have a project in mind or want to collaborate? I'd love to hear from you.
I'm currently open to new opportunities in industrial software engineering, process digitalization, and fullstack development roles in manufacturing and supply chain.