Job Title: Electronics & Controller Specialist

Location: Hyderabad (Onsite)

Working Days: 6 Days a Week

Client: Refroid Technologies (https://www.refroid.com)

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 Overview 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

Key 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 Domain Experience

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 solid advantage.

Education

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.

📌 Electronics & Controller Specialist (Hyderabad)
🏢 Refroid Technologies Private
📍 Hyderabad