| Detail | For this role |
|---|---|
| Department | Information Technology |
| Level | Entry level |
| Reports to | Firmware Lead |
| Direct reports | None |
| Experience | Fresher or up to 2 years in firmware development |
Firmware Engineer job description template
Copy this job description, replace the text in square brackets and post it on your careers page or a job portal.
Job title: Firmware Engineer
Department: Information Technology
Reports to: Firmware Lead
Location: [City], [office, branch or site]
About the role
A Firmware Engineer writes the low level code that controls a device's hardware directly, managing boot, drivers, peripherals and power. At the entry level they write device drivers, configure hardware registers and debug on target boards under senior guidance. A good junior firmware engineer reads schematics and datasheets carefully, writes precise register level code and verifies timing on real hardware. The role sits in a hardware product or R and D team and reports to a firmware lead or senior engineer, working closely with hardware designers.
Key responsibilities
- Write and test device drivers and low level routines that control hardware peripherals.
- Configure microcontroller registers, clocks and power modes based on datasheets.
- Bring up new boards with hardware engineers, checking each interface works.
- Debug timing and signal issues using an oscilloscope, logic analyser and debugger.
- Implement communication over buses such as I2C, SPI, UART and CAN.
- Optimise firmware for power consumption in battery powered devices.
- Write test routines to verify hardware behaviour under different conditions.
- Manage firmware versions and safe over the air update mechanisms carefully.
- Document register maps, driver interfaces and bring up results.
- Learn the hardware, toolchain and debugging methods with support from seniors.
Requirements
- Graduate in electronics, electrical or computer engineering
- Working knowledge of embedded C and microcontroller hardware
- A hardware or firmware project is an advantage
- Fresher or up to 2 years in firmware development
KRAs and KPIs for a Firmware Engineer
Key result areas for the appraisal form, each with a KPI you can measure every month or quarter.
| Key result area | How to measure it |
|---|---|
| Driver delivery | Assigned drivers and routines delivered within estimates |
| Hardware reliability | Interfaces verified on target with defects after handover kept low |
| Power efficiency | Power consumption meets the target for battery powered features |
| Bring up support | New boards brought up within the planned schedule |
| Code quality | Register level code passes review with limited rework |
| Learning | New firmware and hardware skills picked up each quarter |
Skills and tools
Tools used day to day: Embedded C, STM32CubeIDE or IAR, Oscilloscope, Logic analyser, JTAG or SWD debugger, Git.
Reporting line and career path
Next roles: Senior Firmware Engineer, Firmware Lead, Embedded Systems Architect
Interview questions for a Firmware Engineer
- How do you configure a microcontroller peripheral using its datasheet?
- What happens during board bring up and what do you check first?
- How do you debug a signal timing problem with an oscilloscope?
- How do you reduce power consumption in a battery device?
- What is a memory mapped register and how do you write to it safely?
- Tell me about a driver you wrote and how you verified it.
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What does a firmware engineer do?
A firmware engineer writes the low level code that controls a device's hardware directly. They build device drivers, configure microcontroller registers, bring up new boards and debug timing and signal issues on real hardware. Their work sits between the electronics and the higher level software, so reading schematics and datasheets is a daily task.
What is the difference between a firmware engineer and an embedded engineer?
The roles overlap heavily. A firmware engineer usually focuses on the lowest level: drivers, registers, boot and hardware bring up. An embedded software engineer may work a level higher, on application logic and real time behaviour on the device. In many companies one engineer covers both, and the titles are used loosely.
What skills do you need for a firmware job in India?
You need strong embedded C, comfort with microcontroller hardware and registers, and hands on debugging with an oscilloscope and logic analyser. Knowing communication buses such as I2C, SPI and UART helps a lot. Employers value the ability to read datasheets and schematics and to verify code on the actual board, not just in simulation.