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 current 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.

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