FULL-TIME · ONSITE · HYDERABAD

Electronics & Controller

7-10 Years of Industry Experience

About Company

At Refroid Technologies, we are pioneering next-generation liquid cooling solutions that redefine how data infrastructure operates. From hyperscale data centers to high-performance edge environments, our modular and efficient systems are engineered to reduce energy consumption, maximize performance, and contribute to a greener planet.

Role Summary

The Electronics & Controller Specialist will be responsible for the design, development, integration, testing, troubleshooting, and validation of electronic control systems used in Refroid's cooling and thermal-management products. 


The role will involve close collaboration with Mechanical, Thermal, Electrical, Firmware/Software, Product Development, Manufacturing, Quality, and Service teams to develop reliable controller and electronics solutions for cooling equipment. The ideal candidate should have hands-on experience in programable logic controllers, industrial automation, sensors, control systems, PCB/electronics, communication protocols, instrumentation, and product testing. 

Key Responsibilities

1. Electronics Architecture & Product Development 

  • Design and develop electronic control systems for cooling and thermal-management products. 

  • Define electronics architecture for CDUs, cooling systems, pumps, valves, fans, sensors, actuators, and monitoring systems. 

  • Select appropriate microcontrollers, processors, sensors, communication interfaces, drivers, relays, power supplies, and other electronic components. 

  • Develop system-level block diagrams, schematics, wiring/interface diagrams, and electronics architecture documentation. 

  • Participate in new product development from concept through prototype, validation, and production release. 

  • Support Design for Manufacturing (DFM) and Design for Reliability (DFR) activities. 

2. PLC-SCADA & Control Systems

  • Develop and integrate programable logical controllers for cooling and thermal-management applications. 

  • Develop control logic for: 

  • Pumps 

  • Fans 

  • Valves 

  • Compressors 

  • Temperature control 

  • Pressure monitoring 

  • Flow control 

  • Liquid level monitoring 

  • Safety interlocks 

  • Alarm and fault conditions 

  • Implement closed-loop control strategies where applicable. 

  • Design, configure and deploy intuitive HMI screens and SCADA systems for real time monitoring. 

  • Work with PID/control algorithms for temperature, pressure, flow, and other process parameters. 


3. Sensors & Instrumentation

  • Select, integrate, calibrate, and troubleshoot sensors used in thermal-management systems. 

  • Experience with sensors such as: 

  • Temperature sensors 

  • Pressure sensors 

  • Differential pressure sensors 

  • Flow sensors/meters 

  • Humidity sensors 

  • Liquid level sensors 

  • Current/voltage sensors 

  • Leak detection sensors 

  • Develop appropriate signal-conditioning and interface circuits. 

  • Ensure sensor accuracy, reliability, calibration, and signal integrity. 


4. Communication Protocols 

Strong understanding and hands-on experience with industrial communication protocols such as:

  • Modbus RTU / TCP 

  • RS-485 

  • CAN / CAN-FD 

  • UART 

  • SPI 

  • I2C 

  • Ethernet 

  • MQTT 

  • TCP/IP 

  • BACnet / OPC-UA is an added advantage. 

  • Integrate controllers with BMS, SCADA, PLC, cloud dashboards, and monitoring platforms. 

  • Troubleshoot communication and interoperability issues between controllers and external systems. 

  • Support development of communication maps, registers, addressing, and interface documentation. 


5. PCB & Electronics Development

  • Review PCB layouts for signal integrity, grounding, EMI/EMC considerations, thermal performance, and manufacturability. 

  • Support selection of: 

  • MOSFETs 

  • Relays 

  • Drivers 

  • ICs 

  • Connectors 

  • Power supplies 

  • Protection components 

  • Communication interfaces 

  • Review component ratings and electrical safety requirements. 

  • Support prototype PCB bring-up and debugging. 


6. Firmware & Embedded Software 

  • Work with firmware developers to define control requirements and system functionality. 

  • Develop or review embedded firmware for controllers where required. 

  • Debug firmware and hardware integration issues. 

  • Support implementation of: 

  • Fault detection 

  • Alarm handling 

  • Data logging 

  • Sensor monitoring 

  • Control loops 

  • Safety interlocks

  • System diagnostics 

  • Experience with Embedded C/C++ will be preferred. 


7. Testing & Validation

  • Develop electronics and controller test plans and test procedures. 

  • Perform functional testing of controllers and electronic systems. 

  • Conduct Hardware-in-the-Loop (HIL) or system-level testing where applicable. 

  • Perform sensor validation and calibration. 

  • Conduct environmental and reliability testing. 

  • Support EMI/EMC testing and troubleshooting. 

  • Identify root causes of hardware, firmware, communication, and control-system failures.

  • Implement corrective and preventive actions. 


8. Product Integration

  • Integrate electronics and controllers with mechanical, thermal, electrical, and software systems. 

  • Work with Thermal and Electrical Engineers to ensure proper control of cooling equipment. 

  • Support integration of controllers with: 

  • Pumps 

  • Fans 

  • Compressors

  • Valves 

  • Heat exchangers 

  • CDUs 

  • Cooling loops 

  • Data-center monitoring systems 

  • Participate in prototype builds and system commissioning. 


9. Troubleshooting & Root Cause Analysis

  • Diagnose hardware, controller, sensor, communication, and control-system failures. 

  • Perform systematic root-cause analysis using tools such as: 

  • Oscilloscope 

  • Multimeter 

  • Logic analyzer 

  • Power analyzer 

  • CAN/Modbus diagnostic tools 

  • Electronic test equipment 

  • Analyze field failures and customer issues. 

  • Implement design improvements to improve product reliability and serviceability. 


10. Engineering Documentation 

Prepare and maintain:

  • Electronics architecture documents 

  • Schematics 

  • Wiring/interface diagrams 

  • BOM 

  • Component specifications 

  • Controller specifications 

  • I/O lists 

  • Communication maps 

  • Sensor specifications 

  • Test procedures 

  • Validation reports 

  • Failure analysis reports 

  • Engineering change documentation

  • Product release documentation 

Technical Skills

Electronics 

  • Analog and digital electronics 

  • PCB development 

  • Signal conditioning 

  • Power electronics fundamentals 

  • Electronic component selection 

  • Hardware debugging 


Controls & Instrumentation

  • PLC-SCADA 

  • PID control 

  • Temperature control 

  • Pressure control 

  • Flow control 

  • Sensor integration 

  • Actuator control 

  • Industrial instrumentation 

  • Control-system troubleshooting 


Communication

  • Modbus RTU/TCP 

  • RS-485 

  • CAN/CAN-FD 

  • UART 

  • SPI 

  • I2C 

  • Ethernet 

  • MQTT 

  • TCP/IP 


Engineering Tools 

Experience with relevant tools such as: 

  • TIA – Total Integrated Automation portal 

  • Wincc 

  • Altium Designer / KiCad / OrCAD 

  • MATLAB/Simulink 

  • LTspice / PSpice 

  • Logic Analyzer 

  • CAN analyzers 

  • Modbus diagnostic tools 

Preferred Industry Background

Candidates with experience in one or more of the following industries will be preferred: 

  • HVAC 

  • Refrigeration 

  • Chillers 

  • Data Center Cooling 

  • Liquid Cooling 

  • Thermal Management 

  • Industrial Automation 

  • Industrial Electronics 

  • Automotive Electronics 

  • Power Electronics 

  • Energy Management 

  • Industrial Equipment 

  • Building Management Systems 

  • Process Control 


Experience with CDUs, liquid cooling systems, data-center infrastructure, pumps, valves, heat exchangers, chillers, or refrigeration control systems will be a strong advantage. 

Educational Qualification

Mandatory: 

  • B.E./B.Tech in Electronics & Communication Engineering, Electronics Engineering, Electrical & Electronics Engineering, Instrumentation Engineering, or related discipline. 


Preferred: 

  • M. Tech/M.E. in Electronics, Control Systems, Control & Instrumentation, or related field. 

Ready to Apply?

Ready to Apply?
Interested in joining Refroid? Submit your application through our Careers Application Form.