Embedded Firmware Engineer – Wireless & Sensors Location: Hyderabad Experience: 4–6 years Job Overview We are looking for a skilled Embedded 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. Key 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 • 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 Required Skills & Qualifications • 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 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