Embedded & Linux Driver Engineer

Crocus is hiring for a

Role
Own low-level firmware on STMicro MCUs and Linux kernel drivers. You’ll write bare‑metalC/C++ for STM32/STM8, develop/extend Linux device drivers for board peripherals,analyze schematics, and build small Qt desktop tools for test/diagnostics.Responsibilities

• Bare‑metal STM32/STM8 firmware (startup/linker, clock & power, pinmux, ISRs,

timers/PWM, ADC/DAC, DMA).

• Linux kernel driver development: platform/char/tty drivers,

SPI/I²C/UART/RS485/CAN, GPIO/IRQ, DMAengine, Device Tree (DTS/overlays),
sysfs/debugfs hooks.

• Board bring‑up & HW–SW debug with ST‑LINK/SWD, GDB, oscilloscope & logic

analyzer; root‑cause timing/signal issues.

• Implement bootloaders & firmware update paths (UART/USB/CAN/OTA as applicable).
• Build Qt (Widgets/QSerialPort/QThread) utilities for production test, logging, and field

diagnostics.

• Schematic analysis: review power/clock/reset trees, transceiver bias/termination, level

shifting, EMI/ESD paths; propose fixes.

• Write tests, docs, release notes; contribute to code reviews and CI.

Must‑have Skills (all required)

• 2–3 years commercial embedded experience.
• Strong C for MCU (register‑level) and C for Linux kernel (kernel style, modules,

locking/IRQs, workqueues).

• STM32 toolchain: STM32CubeMX, HAL/LL (or SPL legacy), and at least two IDEs

(STM32CubeIDE/Keil/IAR/PlatformIO).

• Peripheral drivers with DMA: UART/SPI/I²C/Timers/ADC + one field bus (RS485/CAN).
• Linux driver expertise covering: Serial/tty (UART/RS485), SPI/I²C client drivers with

regmap, CAN (SocketCAN) bring‑up, basic USB CDC device; Device Tree authoring,

sysfs/debugfs, udev integration, dkms/out‑of‑tree module flow; cross‑compile & board
bring‑up (toolchains, initramfs; Buildroot/Yocto basics).

• Protocols & stacks: Modbus RTU/TCP, TCP/UDP sockets, framing, timeouts, error

handling (CRC/RTU timing).

• FreeRTOS fundamentals (tasks/queues/ISRs, tickless/low‑power) even if projects are

bare‑metal first.

• Qt basics for test apps (port selection, read/write, threading, simple plotting/logging).
• Coding standards & quality: MISRA‑C:2012, CERT‑C, static analysis

(cppcheck/clang‑tidy/PC‑lint), unit/integration tests, CI (GitHub/GitLab).

• Schematic reading and measurement‑driven debugging (scope/LA), including

terminations/biasing and crystal/PLL checks.

• Solid Git workflow; CMake/Make; basic Python for test automation.

Qualifications

• B.E./B.Tech/M.Tech (ECE/EEE/CSE) or equivalent practical experience.
• Shipped at least one STMicro‑based product from bring‑up to field and delivered at least

one Linux driver on hardware.
Engineering Toolchain (IDE, Build, CI)STM32CubeIDE/Keil/IAR • CubeMX • ST‑LINK/J‑Link • GCC/Clang cross‑toolchains •Buildroot/Yocto (basic) • Git • CMake/Make • Python • Qt Desktop • Oscilloscope & LogicAnalyzer.

Location: Bangalore • Work mode: Onsite only • Team: Embedded R&D • Type: Full-time

Interested candidates kindly share your updated CV at jobs@crocustech.net

Job Types: Full-time, Permanent

Pay: ₹40,000.00 - ₹55,000.00 per month

Benefits:

• Health insurance
• Provident Fund

Ability to commute/relocate:

• HSR Layout, Bengaluru, Karnataka: Reliably commute or planning to relocate before starting work (Required)

Work Location: In person