INDQ
Website:
indq.in
Job details:
# Firmware Engineer / Embedded Systems Engineer – Medical Devices
INDQ is looking for a Firmware / Embedded Systems Engineer to develop reliable, production-ready firmware for medical devices and advanced engineering products.
The ideal candidate should have strong hands-on experience with **ESP32, STM32, Nordic Semiconductor platforms**, sensor interfacing, communication protocols, real-time embedded systems, and **signal processing**. The role will involve working closely with hardware, biomedical, mechanical, and product-development teams to convert device requirements into robust embedded solutions.
The candidate should be comfortable working from the **sensor level to the complete device level** — including peripheral interfacing, communication, data acquisition, signal processing, control algorithms, debugging, validation, and firmware documentation.
## Key Responsibilities
* Develop embedded firmware for **ESP32, STM32, Nordic nRF52/nRF53/nRF54 and similar microcontrollers**.
* Develop firmware for medical and healthcare devices involving sensors, actuators, displays, communication modules, and data acquisition systems.
* Interface and acquire data from various sensors such as:
* ECG / biopotential sensors
* PPG / SpO₂ sensors
* Temperature sensors
* Pressure sensors
* IMUs
* Load cells
* Optical sensors
* Analog front ends (AFEs)
* Other biomedical and industrial sensors
* Implement **signal conditioning and digital signal-processing algorithms** for noisy physiological and sensor data.
* Develop algorithms for filtering, noise reduction, feature extraction, signal quality assessment, and parameter estimation.
* Work with ADCs, DACs, timers, PWM, interrupts, DMA, GPIO, RTC, watchdogs, and low-power peripherals.
* Develop and debug communication interfaces including: UART, SPI, I²C, RS-232 / RS-485, CAN / CAN-FD, USB, BLE, Wi-Fi, Ethernet
* Develop BLE applications and profiles using Nordic/Zephyr or equivalent platforms.
* Interface embedded systems with mobile applications, PCs, cloud platforms, and external medical equipment where required.
* Implement real-time control and state-machine-based firmware.
* Develop bootloaders, firmware update mechanisms, and **OTA updates** where required.
* Implement data logging, memory management, EEPROM/Flash storage, and configuration management.
* Perform hardware bring-up and board-level debugging.
* Debug firmware using oscilloscopes, logic analyzers, multimeters, JTAG/SWD debuggers, and other laboratory equipment.
* Analyze communication buses and troubleshoot hardware–firmware integration issues.
* Optimize firmware for **performance, memory usage, power consumption, and reliability**.
* Develop firmware with appropriate fault handling, watchdog mechanisms, error detection, and recovery mechanisms.
* Participate in firmware verification, validation, and system-level testing.
* Maintain firmware architecture, source-code documentation, interface specifications, test procedures, and technical documentation.
* Work within a structured **medical-device product-development and quality-management environment**.
Experience with **FreeRTOS, Zephyr RTOS, or other RTOS environments** is highly desirable.
### Programming
* Strong proficiency in **Embedded C**
* Good knowledge of C++
* Pointers, structures, unions, bit manipulation, memory management
* Interrupt-driven programming
* DMA-based data acquisition
* Timers and peripheral programming
* State machines
* Multithreading / RTOS concepts
* Memory-constrained embedded programming
* Version control using **Git**
The candidate should be able to **read a communication protocol specification and implement/debug the protocol at firmware level**.
Signal Processing
This is an important part of the role.
The candidate should have practical understanding of:
* Digital signal processing
* Sampling theory
* Nyquist theorem
* Digital filtering
* Moving-average filters
* FIR / IIR filters
* Low-pass / high-pass / band-pass filtering
* Notch filtering
* Noise reduction
* Baseline removal
* Signal normalization
* FFT / frequency-domain analysis
* Peak detection
* Feature extraction
* Signal quality assessment
* Sensor fusion
* Real-time signal processing on microcontrollers
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Knowledge of the following is an advantage:
* Medical-device firmware development
* Physiological signal acquisition
* ECG / PPG / SpO₂
* Patient monitoring systems
* Wearable medical devices
* Diagnostic devices
* Therapeutic devices
* Sensor calibration
* Measurement accuracy and repeatability
* Firmware verification and validation
* Risk-based development
* IEC 62304
* IEC 60601
* ISO 13485
* ISO 14971
* Software lifecycle documentation
* Design inputs / outputs
* Verification and validation
## What We Are Looking For
We are looking for someone who can **independently take ownership of firmware development**, rather than someone who only writes basic microcontroller code.
The ideal candidate should be able to:
**Understand requirement → select architecture → interface hardware → acquire sensor data → process signals → implement algorithms → establish communication → debug → validate → document → release production firmware.**
Strong **hands-on problem-solving ability** is more important than knowing a large number of platforms theoretically.
## Experience
**Recommended experience:** 2–5+ years in embedded/firmware development.
Freshers with exceptional hands-on experience in embedded systems, biomedical instrumentation, signal processing, and significant personal/academic projects may also be considered.
## Education
Preferred backgrounds:
* B.E. / B.Tech – Electronics & Communication Engineering
* B.E. / B.Tech – Electrical / Electronics Engineering
* B.E. / B.Tech – Biomedical Engineering
* B.E. / B.Tech – Instrumentation Engineering
* M.E. / M.Tech in relevant fields
Equivalent practical experience will also be considered.
## Key Skills / Keywords
**Embedded C | C++ | ESP32 | STM32 | Nordic nRF52/nRF53/nRF54 | ARM Cortex-M | FreeRTOS | Zephyr | UART | SPI | I²C | RS-485 | CAN | USB | BLE | Wi-Fi | TCP/IP | MQTT | ADC | DAC | DMA | RTOS | Sensor Interfacing | Biomedical Sensors | Signal Processing | DSP | FIR | IIR | FFT | ECG | PPG | SpO₂ | IMU | Data Acquisition | Hardware Debugging | JTAG | SWD | Git | Firmware Validation | Medical Devices**
Click on Apply to know more.
