Embedded Firmware Engineer – Wireless & Sensors

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