IoT Firmware Engineer Jobs in Chennai Embedded Systems and Firmware Company

📋 Job Description

Jobzi is sourcing qualified candidates for IoT Firmware Engineer positions in Chennai's private Embedded Systems and Firmware Company sector. This is a full-time opportunity with a reputed Embedded Systems and VLSI employer in Chennai offering competitive salary, structured growth, and a professional work environment. Tamil communication skills are preferred alongside English for professional and business interaction in Chennai.

📌 Key Responsibilities

• Develop firmware for IoT devices using BLE, Wi-Fi, or LoRaWAN connectivity stacks
• Implement MQTT or CoAP client firmware for cloud connectivity
• Integrate TLS/DTLS security for secure device-to-cloud communication
• Implement OTA (Over-The-Air) firmware update mechanisms on embedded devices
• Write power management firmware to maximise battery life on wireless sensor nodes
• Test RF performance and connectivity reliability in lab and field conditions
• Debug connectivity issues using Wireshark and protocol analyser tools

🎓 Qualifications and Requirements

• Have you written BLE GATT service and characteristic code on Nordic nRF5 or ESP32?
• How do you implement a reliable MQTT reconnection strategy on a resource-limited MCU?
• Describe your approach to securing MQTT communication on a microcontroller using TLS.
• How do you implement OTA firmware updates with rollback protection on ESP32 or nRF52?
• What techniques do you use to minimise current consumption during BLE advertising?
• Have you worked with AWS IoT Core or Azure IoT Hub device SDKs?
• How do you test BLE connectivity and signal strength in a lab environment?
• Good Tamil and English communication skills for team coordination and client interaction in Chennai.

✅ Required Skills