Firmware Engineer

We are looking for a skilled Firmware Engineer with strong experience in Bluetooth Low Energy (BLE) and embedded systems, along with a solid foundation in Digital Signal Processing (DSP). The ideal candidate will work on high-performance, low-power wireless devices involving sensor data acquisition, real-time streaming, and advanced signal conditioning using filtering techniques.

Responsibilities:

• Design, develop, and maintain firmware for embedded systems with a focus on Bluetooth Low Energy (BLE) communication.
• Work with Wi-Fi and other wireless technologies (optional but preferred).
• Interface and integrate sensors such as: Accelerometers, Gyroscopes, Other IMU / environmental sensors.
• Implement Digital Signal Processing (DSP) techniques for real-time sensor data analysis.
• Design and apply filtering techniques such as: Low-pass, high-pass, and band-pass filters, Moving average and exponential smoothing filters.
• Sensor fusion filters (e. g., complementary filters, basic Kalman filtering).
• Develop solutions for high-frequency data acquisition and streaming over BLE and/or Wi-Fi.
• Implement and optimize mesh communication protocols.
• Work extensively with Nordic Semiconductor (nRF) platforms, including nRF5 SDK, nRF Connect SDK (NCS).
• Design and optimize data storage systems using NOR Flash, ensuring efficient: Data logging, Retrieval, Wear leveling (if applicable).
• Optimize firmware for: Low power consumption, Bluetooth range and reliability, and System performance and latency.
• Debug, test, and validate firmware using standard tools (JTAG, RTT, logs, etc. ).
• Collaborate with hardware, mobile, and backend teams for system integration.

Cross-Functional Collaboration:

• Work closely with hardware engineers to co-design power-efficient systems.
• Align on RF performance tuning and BLE/Wi-Fi optimization.
• Enable efficient sensor data pipelines and storage systems.
• Jointly debug system-level issues across hardware and firmware.

Requirements:

• Experience: 4-6 years.
• Strong experience in Embedded C/C++ programming.
• Hands-on experience with BLE stack development and debugging.
• Solid understanding of Digital Signal Processing (DSP) concepts, including: Sampling theory and aliasing, Noise reduction techniques, Time-domain and basic frequency-domain analysis.
• Experience implementing filters on embedded systems for real-time data conditioning.
• Experience working with sensor data acquisition and processing (IMU preferred).
• Solid understanding of: Real-time systems, Interrupts, timers, and low-power modes.
• Experience with nRF52/nRF54 series or similar MCUs.
• Familiarity with high-throughput data transfer over BLE.
• Experience with flash memory management.
• Understanding of wireless communication fundamentals.
• Experience in production-grade firmware development.
• Familiarity with mobile app interaction (BLE central side).

Preferred Qualifications:

• Exposure to power profiling and optimization tools.
• Experience with OTA (Over-the-Air) firmware updates.
• Knowledge of RTOS (Zephyr preferred for NCS).
• Experience with sensor fusion algorithms (e. g., orientation estimation using IMU data).
• Experience implementing or working with BLE Mesh or other mesh protocols.
• Experience with Wi-Fi-based embedded systems.
• Experience in wearable devices / IoT products.
• Familiarity with FFT or spectral analysis in embedded environments.

Soft Skills:

• Strong analytical thinking, especially for signal interpretation and noise handling.
• Strong problem-solving and debugging skills.
• Ability to work independently and in cross-functional teams.
• Good communication and documentation skills.