Electronics & Controller Specialist

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 strong 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.