Sumondo
Website:
sumondo.co
Job details:
Job Title: Hardware Prototyping Intern – Wearable Biosensing Device
Company Description
Sumondo is dedicated to addressing mental health issues through innovative, research-driven solutions. We need to develop medical-grade sensors which would work with mobile app allow users to monitor their health parameters in real-time and track changes to identify mental triggers. The app offers personalized mindfulness treatments, including breathing exercises, relaxing music, and meditation techniques tailored to individual needs. Sumondo's mission is to impact on the society by improving mental health issues and reducing the burden to the society.
Location: Medivalley at AMTZ Site Office, C/O AMTZ Campus, Steel Plant, Visakhapatnam, Andhra Pradesh - 530031, adjacent to Pragathi Maidan, 530031 | Duration: [3–6 Months] | Type: Internship (Paid) would be converted to long term job, on successful completion.
About the Role
We are looking for a motivated and hands-on Hardware Prototyping Intern to help us build and validate a multi-modal wearable biosensing device. The device aims to capture a comprehensive picture of human physiology — with HRV (Heart Rate Variability) as our primary signal of interest — alongside EDA, sleep, and activity metrics. You will play a central role in bringing this concept from idea to working prototype.
What You'll Work On
You will design, assemble, and iterate on a wearable prototype that integrates the following sensing modalities:
- HRV (Heart Rate Variability) — the core signal; accurate PPG or ECG-based acquisition with low noise is the top priority
- EDA (Electrodermal Activity) — skin conductance sensing for stress and arousal tracking
- Sleep Monitoring — multi-signal sleep staging using combinations of PPG, accelerometry, and derived HRV features
- Activity Tracking — IMU-based motion capture (accelerometer + gyroscope) for steps, posture, and movement classification
Key Responsibilities
- Select and evaluate appropriate sensors (e.g., MAX30102, AD8232, ADS1292, GSR modules, IMU such as ICM-42688) for each modality
- Design or adapt PCB schematics and layouts for a compact, body-worn form factor
- Develop firmware (Arduino/C++ or Zephyr RTOS) for real-time data acquisition and transmission (BLE preferred)
- Validate signal quality — especially for HRV — through bench testing and on-body experiments
- Implement basic signal processing pipelines (filtering, R-R interval extraction, HRV metrics like SDNN, RMSSD, LF/HF ratio)
- Iterate on mechanical/enclosure design for wearability and electrode contact
- Document hardware versions, test results, and known limitations clearly
What We're Looking For
Required:
- Currently pursuing a degree in Electrical Engineering, Biomedical Engineering, Embedded Systems, or a related field
- Hands-on experience with microcontrollers (ESP32, nRF52, STM32, or similar)
- Basic understanding of analog signal acquisition — especially biopotential or optical signals
- Familiarity with I2C, SPI, UART communication protocols
- Ability to read datasheets and sensor application notes independently
Nice to Have:
- Prior experience with HRV, PPG, or ECG signal processing
- Experience with KiCad, Altium, or EasyEDA for PCB design
- Knowledge of BLE (Bluetooth Low Energy) data streaming
- Familiarity with Python or MATLAB for signal analysis and validation
- Experience with wearable or e-textile form factors
What You'll Gain
- Deep hands-on experience building a real biosensing product from scratch
- Exposure to the full hardware development cycle — from component selection to validated prototype
- Mentorship from experienced engineers working at the intersection of hardware, health, and data
- Potential to continue as a full-time role or extended contract based on performance
To Apply
- Please send your CV, a brief note on any relevant projects, and (if available) photos or videos of hardware you've built to info@sumondo.co
Click on Apply to know more.