Junior Software Developer - HVAC R Controls

About the role

CAREL designs and delivers bespoke control solutions for commercial HVAC/R applications across the UAE and the wider Middle East, including chillers, air handling units, rooftop units, heat pumps and commercial refrigeration systems. It develops application software on its programmable controllers using the STone software, an IEC 61131-3 based environment. The company is looking for a motivated Junior Software Developer to join its controls engineering team in Dubai, working alongside experienced engineers to turn thermodynamic and customer requirements into robust, reusable control logic.

Key responsibilities

• Develop control application software in Structured Text (IEC 61131-3) within the CAREL STone environment for CAREL programmable controllers (e.g. c.pCO family)
• Implement control functions such as compressor and fan staging, PID loops, EEV and superheat control, defrost, alarms and safety interlocks
• Build and maintain reusable function blocks and custom libraries
• Test and debug software using simulation and software-in-the-loop tools before deployment
• Configure communication with BMS and third-party devices over Modbus RTU/TCP and BACnet
• Design and configure HMI / terminal screens and controller web pages
• Support factory testing, on-site commissioning and troubleshooting of HVAC/R units across the UAE
• Use version control, follow team workflows including code reviews and structured release management
• Prepare technical documentation: I/O lists, parameter tables, functional descriptions and user notes
• Apply secure configuration practices to protect controllers against unauthorised access

Required profile

• Bachelor's degree or diploma in Mechatronics, Electrical/Electronic, Control & Automation, Computer Engineering or Mechanical Engineering with a strong programming component
• Fluent written and spoken English
• Methodical, detail-oriented approach to testing and debugging, eager to learn

Required skills

• Structured Text / PLC programming: practical experience with IEC 61131-3 (e.g. CODESYS, TwinCAT, Siemens SCL), or strong C, C++/Pascal-style programming with willingness to switch quickly
• Programming fundamentals: state machines, timers, data structures and modular, reusable code design
• Control basics: PID control, hysteresis, setpoints, alarm handling and interlocks

What we offer

• Full-time, permanent position based in Dubai
• UAE employment visa sponsored by the company
• Competitive tax-free salary
• Structured training on the CAREL STone platform and mentoring by experienced controls engineers
• Hands-on exposure to a wide range of commercial HVAC/R projects, from design to commissioning

Shortlisted candidates are invited to a technical interview, including a short practical exercise in Structured Text.