Job Description:

Role Summary

We are looking for a highly skilled Embedded Systems Developer with strong hands-on experience in STM32, nRF series, and 8051 microcontrollers. The ideal candidate possesses deep knowledge of C programming and excels at hardware-level debugging. You will be responsible for developing, testing, and optimizing firmware for real-world embedded products — working closely with hardware engineers and cross-functional teams.

Key Responsibilities

Firmware Development

- Design, develop, and maintain firmware in C for STM32 (ARM Cortex-M), nRF52/nRF5340, and 8051 family microcontrollers
- Write optimized, low-level C code for bare-metal and RTOS-based environments
- Implement and manage peripheral drivers: GPIO, UART, SPI, I2C, ADC, PWM, DMA
- Develop and integrate communication stacks: BLE (nRF), CAN, RS485, Modbus, USB
- Port and configure RTOS (FreeRTOS / Zephyr) on STM32 and nRF platforms
- Optimize code for memory footprint and real-time performance constraints

Hardware Debugging & Bring-up

- Perform board bring-up and hardware validation for new PCB designs
- Debug firmware and hardware issues using JTAG/SWD, J-Link, ST-Link, logic analyzers, and oscilloscopes
- Analyze and resolve complex hardware-firmware interaction problems
- Perform memory debugging, stack overflow analysis, and real-time trace (ETM/ITM)
- Conduct thorough code reviews and unit/integration testing

Collaboration & Documentation





- Work closely with hardware engineers to review schematics and PCB designs
- Prepare technical documentation: firmware architecture, API docs, test reports
- Participate in Agile/sprint-based development cycles
- Mentor junior embedded developers and support knowledge transfer

Microcontrollers

STM32 (Cortex-M0/M3/M4/M7), nRF51/52/5340, 8051 / AT89 family

Programming

Strong proficiency in C; bit manipulation, pointers, memory management

RTOS

FreeRTOS, Zephyr OS — task scheduling, queues, semaphores, mutexes

Interfaces

UART, SPI, I2C, CAN, USB, RS485, Modbus, BLE (nRF SDK / SoftDevice)

Debug Tools

JTAG / SWD, J-Link, ST-Link, oscilloscope, logic analyzer, multimeter

IDE / Tools

STM32CubeIDE, STM32CubeMX, Keil MDK, SEGGER Embedded Studio, GCC

Version Control

Git — branching, pull requests, code reviews

Preferred / Valuable to Have

- Experience with nRF Connect SDK and Bluetooth Low Energy (BLE) stack development
- Knowledge of low-power design techniques (sleep modes, power profiling)
- Exposure to wireless protocols: Zigbee, LoRa, Wi-Fi (ESP32 + STM32 combo)
- Familiarity with Python or shell scripting for automation / test tooling
- Experience with MISRA-C coding standards or automotive-grade firmware development
- PCB review experience using KiCad or Altium Designer
- Knowledge of bootloader development (custom / DFU over BLE)
- Prior experience in IoT, industrial automation, medical devices, or automotive domains

📌 Embedded Systems Developer (Noida)
🏢 RECEX
📍 Noida