Senior Software Engineer (PLC & Automation)

fa systems automation (s) pte ltd; Singapore; On-site; SGD 60,000 - 90,000; Full time

Job summary

FA Systems Automation (S) Pte Ltd seeks a skilled PLC automation engineer in Singapore to configure, install, test, commission, and buy-off automation systems on site.

You will develop, maintain, and optimize PLC programs (Omron, Keyence) using IEC 61131-3 languages and collaborate with cross-functional teams to ensure project success from development through customer acceptance.

Experience with industrial protocols (RS232, TCP/IP, Modbus, EtherCAT) and MES/ERP integration is a plus.

Qualifications

• Experience with IEC 61131-3 programming standards.
• Hands-on PLC programming for Omron and Keyence systems.
• Ability to troubleshoot and optimize automation systems.

Responsibilities

• Configure, install, test, commission, and buy-off PLC systems on site.
• Develop and optimize PLC programs using IEC 61131-3 languages.
• Troubleshoot, debug, and tune performance of automation systems.
• Design PLC communication with RS232, TCP/IP, Modbus, EtherCAT, SECS/GEM.
• Develop integration solutions using REST APIs, SOAP, XML for MES/ERP.
• Apply advanced PLC concepts to improve reliability and maintainability.
• Collaborate with cross-functional teams from development to customer acceptance.

Skills

PLC programming

Troubleshooting

Project collaboration

Education

Bachelor's degree in Electrical Engineering

Tools

Omron PLC

Keyence PLC

REST APIs

XML

EtherCAT

Modbus

RS232

TCP/IP

Job description

Configure, set up, and support on‑site installation, testing, commissioning, and buy‑off of PLC and automation systems.

Develop, maintain, and optimize PLC programs (e.g. Omron, Keyence) using IEC 61131‑3 programming languages, including Ladder Diagram (LD), Function Block Diagram (FBD), Structured Text (ST), and Statement List (IL).

Perform system troubleshooting, debugging, optimization, and performance tuning to ensure project requirements are met, including application of semiconductor manufacturing process knowledge.

Design reliable communication between PLCs and external devices using industrial communication protocols such as RS232, TCP/IP, Modbus, EtherCAT, and SECS/GEM.

Develop software integration solutions using web services (REST APIs, SOAP, XML) to enable communication between PLCs, MES, ERP, and other Industry 4.0 manufacturing systems.

Apply advanced PLC programming concepts, including reusable function blocks, structured program architecture, task management, and scan‑time optimization to improve system reliability and maintainability.

Collaborate with cross‑functional teams to resolve technical issues and support successful project execution from development through customer acceptance.