**Role & seniority: ** PLC Programmer / Automation Engineer (highly technical; senior/advanced implied by ownership of architecture, modular libraries, OOP, commissioning support)

**Stack/tools: ** CODESYS V3.x; IEC 61131-3 (FB/FBD/ST/LD/SFC); CODESYS Visualization; SoftPLC; reusable CODESYS libraries (GVL, persistent variables, pointers/memory); OOP concepts (interfaces/inheritance/encapsulation); task scheduling/real-time execution; version control; Linux-based systems; REST APIs (HTTP/HTTPS, JSON/XML); TCP/IP sockets/serial; IoT/edge

**Top 3 responsibilities: **

Develop/test/maintain PLC applications in CODESYS V3.x
Design scalable/modular automation architecture (FB/SFC, reusable libraries, state machines, OOP patterns) and configure real-time task scheduling
Integrate and support commissioning (I/O mapping, device configuration, debugging/trace, implement industrial comms + API/IoT integrations)
Must-have skills:
- IEC 61131-3 proficiency and CODESYS library/function block development
- Real-time control system understanding (task scheduling, execution, state machines)
- Industrial communication: Modbus RTU/TCP, CAN/CANopen, OPC UA, MQTT (ability to implement/configure integrations)
Nice-to-haves:
- Industrial cybersecurity knowledge
- Docker (bonus)
- Real-time control tuning (PID)
- Marine/yacht automation experience
Location & work type: Not specified in the provided text.

Full Description

We are looking for a highly technical PLC Programmer / Automation Engineer with strong expertise in CODESYS-based development environments. The candidate must be experienced in IEC 61131-3 programming, real-time control systems, and industrial communication protocols, with the ability to design scalable and modular automation architectures. Key Responsibilities

Develop, test, and maintain PLC applications using CODESYS V3.x platform
Design software architecture using FB, FBD, ST, LD, and SFC
Create reusable and modular CODESYS libraries and custom function blocks
Implement OOP concepts (interfaces, inheritance, encapsulation)
Configure task scheduling and real-time execution
Perform I/O mapping and device configuration
Debug using monitoring, breakpoints, and trace tools
Manage version control and libraries
Integrate systems via APIs and industrial protocols
Support commissioning and troubleshooting

CODESYS (Mandatory)

CODESYS V3.x
Function Blocks, Functions, Programs
Library creation and management
GVL and persistent variables
Pointers and memory handling
State machine design
CODESYS Visualization
SoftPLC environments

Industrial Communication Protocols

Modbus RTU
Modbus TCP/IP
CAN Bus / CANopen
OPC UA
MQTT

Systems & Integration

Linux-based systems
REST APIs (HTTP/HTTPS, JSON/XML)
TCP/IP, sockets, serial communication
IoT and edge devices

Preferred Qualifications

Industrial cybersecurity knowledge
Docker (bonus)
Real-time control and PID tuning
Marine or yacht automation experience
Soft Skills
Strong debugging skills
Clean and modular coding practices
Good documentation
Team collaboration

What We Offer

· Competitive salary and benefits package
· Opportunity to work on innovative and sustainable projects
· Supportive and growth-oriented work environment
· Exposure to international standards and advanced technologies

PLC Programmer / Automation Engineer (CODESYS Expert)

Full Description

CODESYS (Mandatory)

Industrial Communication Protocols

Systems & Integration

What We Offer