I build software that connects plant-floor machines to the systems that run the business: IoT, MES, SCADA and OT/IT integration.
Solution Engineer at Opex Consulting Group and acting product lead for OpexMX, a CMMS. Founder of JoyoDigitama, where I build Voltrus.
Five-plus years in digital manufacturing, from sensor nodes on the line to MES deployments wired into ERP. These are the tools I have shipped with, grouped by ISA-95 level from the business layer down to the field.
SAP integration, Microsoft Dynamics over REST, AWS, Azure, Cloudflare
Siemens Opcenter Execution, Mendix, ArcstoneMES, CMMS (OpexMX), RFID material traceability
SCADA systems, AVEVA Edge, Node-RED, Next.js and React dashboards, MSSQL
Modbus TCP, OPC-UA, Fanuc Focas, MQTT, Modicon M221 and KV-8000 PLCs
ESP32, Raspberry Pi, custom boards in KiCAD, coding printers and weighing scales
Two products take most of my time: OpexMX at Opex Consulting Group, and Voltrus at my own studio, JoyoDigitama.
Opex Consulting Group, acting product lead
A CMMS for maintenance teams: work orders, preventive maintenance, assets, spare parts and reliability reports. It runs as a hosted service or on-premises from the same codebase, with an Android app for technicians in the field.
I lead the technical architecture and product direction, and run product demos for prospective customers.
JoyoDigitama, founder
Protocol tools, SCADA and MES for industry. Voltrus SCADA is a self-hosted SCADA in a single Rust binary that speaks Modbus TCP, OPC UA, S7, EtherNet/IP, DNP3 and BACnet/IP, with its own MQTT broker. Its core is open source under AGPL-3.0.
The protocol explorers, Modbus Poll among them, are native desktop apps. Four of them are on the Mac App Store.
Digital andon for factory lines: production monitoring, downtime tracking, real-time alerts, ISO 14644-1 clean room monitoring and Weibull maintenance analysis.
Machine monitoring and alerts for production lines, on ESP32 nodes over MQTT with Node-RED workflows.
Real-time production counting on Raspberry Pi and Next.js, so the floor sees output as it happens.
Energy monitoring that tracks consumption across facilities, built on ESP32, Node-RED, MQTT and MSSQL.
Dairy farm management: feed composition, breeding calendars and notifications for critical farm events.
Prayer times in the macOS menu bar, with calendar blocking during prayer times.
Client implementations across manufacturing, energy and automation, newest first.
2025
Freyabadi Indonesia, Jakarta
Resolved long-standing issues, improved performance and delivered several change requests in Mendix.
StackMendix, MES
2023–2025
British American Tobacco, three departments
Integrated SAP with a KV-8000 PLC over Modbus TCP to build a fault-free material validation system, with a 100% reduction in material mismatches. Deployed on Azure. Led the daily meeting with the client.
StackSAP integration, Modbus TCP, Azure, PLC
2023–2025
Albéa Group: Surabaya, Demak, Mojokerto, Guangdong
Led development, assembly and deployment of real-time machine monitoring and ticketing. Cut machine downtime by 30% and made operations visible across several sites.
StackESP32, MQTT, Node-RED
2024–2025
Albéa Group: Surabaya, Demak
Led development, assembly and deployment of hourly production counting so the floor can respond quickly.
StackRaspberry Pi, Node-RED, Next.js
2024–2025
Lumileds Singapore
Tailored the arc.ops maintenance module to track maintenance activities.
Stackarc.ops, maintenance, CMMS
2024
Fong's Engineering, Singapore
Tailored arc.ops into an end-to-end MES, integrated with Microsoft Dynamics over REST and with CNC machines over OPC-UA, Fanuc Focas and Modbus.
StackOPC-UA, Fanuc Focas, Modbus, REST, MES
2024
ASM Front-End Manufacturing Singapore
Implemented RFID traceability integrated with SAP for precise material tracking and fewer operational errors.
StackRFID, SAP, traceability
2024
PT. Indolakto
Connected floor devices (PLCs, coding printers, weighing scales) using AVEVA Edge, Node-RED and a Modicon M221 PLC.
StackAVEVA Edge, Node-RED, Modicon M221
Nov 2025 to present
Opex Consulting Group, remote (Jakarta)
Product lead for OpexMX, a CMMS built for scale, hybrid or on-prem deployment, and long-term maintainability. Responsible for technical architecture, product strategy and end-to-end delivery.
Jul 2025 to present
Opex Consulting Group, remote (Jakarta)
Delivering MES with Siemens Opcenter Execution, Opcenter EX PR and Mendix: configuration, deployment, customisation, integration, and close work with manufacturing teams.
2025 to present
PT Joyo Digitama Solusi, Malang
A software studio building its own products for factories, farms and small businesses, Voltrus among them, alongside custom work for clients.
Mar 2023 to Jul 2025
Albéa (PT. Techpack Asia), Semarang
Led the end-to-end IoT architecture for real-time monitoring of 200+ machines across Asia, improving uptime by 30%. Managed a $120K project budget and cut hardware costs by 25%.
Nov 2023 to Feb 2025
Arcstone Pte. Ltd, remote (Singapore)
Led full-cycle MES deployments for 3+ manufacturing clients, all delivered on time. Coordinated DevOps, QA and client IT teams through each go-live.
May 2022 to Dec 2022
PT. Hexa Daya Solusi, South Tangerang
Built the PLC integration layer for MES. Deployed MQTT and Modbus TCP energy monitoring with real-time analytics across several industrial units.
Applied Bachelor of Engineering, Automation Engineering Technology. 2018–2022, GPA 3.51/4.00.
Final project: fault prognosis system for a face-mask body machine, using an AdaBelief-backpropagation neural network (IoT and AI).
Amazon Web Services, 2023
World Invention Intellectual Property Associations (WIIPA), August 2021
Open to collaborations and consulting on MES, SCADA and industrial IoT, or a friendly hello.
[email protected]