Embedded Firmware Engineer – Wireless & Sensors

Location: Hyderabad, India

Department: Engineering

Experience: 4+

Embedded Firmware Engineer – Wireless & Sensors

Location:

Experience:

Job Overview

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