Digite Infotech - Embedded Hardware Developer - IoT

Description :

We are looking for a passionate Embedded Hardware Design Engineer with 1-2 years of experience in developing IoT controller hardware for agricultural and outdoor field applications. The role involves end-to-end hardware design, sensor and actuator integration, and low-power, battery-operated system design. You will collaborate closely with firmware, mechanical, and field testing teams to build reliable, production-ready IoT solutions that operate efficiently in harsh environments.

Key Responsibilities :

Hardware Design & Development :

- Design and develop embedded hardware for IoT controllers used in agricultural applications.

- Create and review schematics for ARM-based microcontrollers (e.g., STM32, ESP32, nRF52).

- Select and integrate sensors (soil moisture, temperature, humidity, pressure, flow, etc.) and actuators (valves, motors, pumps).

- Design circuits for low-power, battery-operated systems with power management and energy harvesting considerations.

- Develop sensor interface circuits (analog/digital) and signal conditioning blocks.

- Design and implement wireless communication modules (LoRa, BLE, Wi-Fi) in hardware.

Prototyping & Testing :

- Develop and assemble hardware prototypes and evaluate performance.

- Conduct bench testing, validation, and field testing of IoT devices.

- Use tools like oscilloscopes, multimeters, logic analyzers, and spectrum analyzers for debugging and validation.

- Collaborate with the firmware team to ensure seamless hardware-firmware integration.

- Optimize designs for ruggedness, power efficiency, and manufacturability.

Power Management & Battery Systems :

- Design circuits for battery charging, power regulation, and energy harvesting (solar).

- Implement sleep/wake power modes and load control circuits to achieve ultra-low power consumption.

- Estimate and validate system battery life and current consumption under various operating modes.

Documentation & Release :

- Create detailed documentation including schematics, BOMs, PCB design files, and test reports.

- Support PCB layout and DFM (Design for Manufacturing) processes.

- Maintain revision control for hardware designs using versioning tools (Git or equivalent).

- Collaborate with vendors and manufacturing partners for component selection and PCB fabrication.

Required Qualifications :

- 1-2 years of professional experience in embedded hardware design for IoT or embedded systems.

- Strong understanding of analog and digital circuit design.

- Experience with ARM-based microcontrollers (STM32, ESP32, nRF52, or similar).

- Hands-on experience with sensor and actuator interfacing.

- Experience with low-power and battery-powered circuit design.

- Working knowledge of communication interfaces (UART, I2C, SPI, RS485).

- Familiarity with wireless module integration (LoRa, BLE, Wi-Fi).

- Proficiency with schematic capture and PCB design tools (Altium, KiCad, Eagle, or OrCAD).

- Knowledge of power supply design (DC-DC converters, LDOs, Li-ion charging circuits).

- Experience with hardware testing and debugging instruments.

- Strong analytical and problem-solving skills with attention to detail.

Preferred Qualifications :

- Experience developing IoT controllers for agriculture (irrigation, weather monitoring, soil sensing).

- Familiarity with environmental and rugged hardware design for outdoor deployments.

- Knowledge of EMI/EMC design practices and protection circuitry (ESD, surge, reverse polarity).

- Experience with solar charging systems or energy harvesting circuits.

- Understanding of manufacturing processes and hardware reliability testing.

- Exposure to hardware-firmware co-design and embedded testing frameworks.

- Bachelors degree in Electronics Engineering, Electrical Engineering, or related field.

Tools & Technologies :

- Design Tools : Altium Designer, KiCad, Eagle, OrCAD

- Simulation : LTspice, Proteus, Multisim

- Debugging Tools : Oscilloscope, Logic Analyzer, Multimeter, JTAG Debugger

- MCUs & Platforms : STM32, ESP32, nRF52, ATmega, etc.

- Communication : LoRa, BLE, Wi-Fi, RS485

- Version Control : Git