Embedded Software Engineer CV Examples & Writing Guide
An embedded software engineer CV gets a call when the first half page names the silicon you have shipped (Cortex-M, i.MX, ESP32), the language and RTOS you write in, the buses you debug (I2C, SPI, CAN, BLE), and one number per job: flash saved, boot time cut, or units shipped. Everything else is supporting detail.
Embedded software engineer CV example (C, FreeRTOS, Cortex-M)
This is a mid-to-senior firmware engineer with eight years on industrial and motion-control products. The person is fictional, but the shape of the CV is what firmware hiring managers in the UK expect: one to two pages of dense technical detail, hardware named, and numbers attached to memory, timing and defects.
Nathan Ruiz
Senior Embedded Software Engineer
Cambridge · n.ruiz@email.com | 07700 900142 | linkedin.com/in/nathanruiz-fw | github.com/nruiz-fw
Summary
Embedded software engineer with eight years writing production C and C++ for ARM Cortex-M devices. Ships bare-metal and FreeRTOS firmware for industrial sensors and motor drives, from schematic review and board bring-up through MISRA C compliance and field updates. Cut one product's boot time from 1.9 s to 340 ms and fit a new protocol stack into 24 KB of remaining flash.
Experience
Senior Embedded Software Engineer · Industrial sensor manufacturer, Cambridge
Mar 2023 – Present
- Own firmware for a 4-sensor process transmitter line on STM32L4 running FreeRTOS; roughly 62,000 units shipped since the 2023 launch with zero firmware-caused field returns.
- Rewrote the sensor sampling path in C99 and moved CRC to the hardware peripheral, cutting boot time from 1.9 s to 340 ms and freeing 11 KB of flash on a part with 256 KB total.
- Brought up three new PCB revisions with the hardware team: wrote the low-level drivers for a 24-bit ADC over SPI, found a 40 mV ground bounce issue on rev B with a logic analyser and scope, and got rev C to production in six weeks.
- Added Unity and CMock unit tests plus a hardware-in-the-loop rig to GitLab CI; test coverage on the application layer went from 0 to 71% and escaped defects per release dropped from 9 to 2.
- Took the codebase to MISRA C:2012 mandatory and required compliance for a functional-safety audit, closing 480 static-analysis findings over two quarters.
Embedded Software Engineer · Servo drive manufacturer, Peterborough
Jun 2020 – Mar 2023
- Wrote CANopen and Modbus RTU stacks for a family of 400 W to 3 kW servo drives; the CAN layer ran a 1 Mbps bus with 12 nodes and no missed frames over a 72-hour soak test.
- Implemented a bootloader with signed firmware images and A/B rollback, which let field service engineers update 2,100 installed drives without a service visit.
- Reduced control-loop jitter from 90 us to under 12 us by moving the current loop into a timer-triggered DMA path and profiling with a GPIO toggle plus scope.
- Debugged a customer-site fault that appeared once every 4 to 5 days: traced it to an unaligned struct access in an ISR using a JTAG trace buffer, and shipped the fix in 9 days.
Graduate Firmware Engineer · Electronics design consultancy, Cambridge
Jul 2018 – Jun 2020
- Delivered firmware for 6 client projects on Nordic nRF52 and Microchip PIC24, including a BLE handheld meter with a 14-month coin-cell battery target that measured 16 months in test.
- Cut average current on a battery product from 41 uA to 9 uA by fixing a peripheral left enabled in sleep and moving logging to a 1 Hz wake.
- Wrote Python test scripts that drove the device over a serial console and cut manual production test time per unit from 6 minutes to 90 seconds.
Education
BEng (Hons) Electronic and Computer Engineering, 2:1
University in the East of England, 2018
Certifications
- TÜV-certified Functional Safety Engineer course (IEC 61508), 2024
- Certified LabVIEW Associate Developer (CLAD), NI, 2019, kept current
Skills
What a firmware hiring manager checks first
Embedded teams are small and every hire has to touch hardware. The screen is quick and it is about four things.
- Silicon and toolchain overlap. Have you written code for the family they use, or something close enough that the datasheet is the only new part? Name architectures and part families, not just "microcontrollers".
- Whether you have shipped. Hobby boards and coursework are fine for a first job, but for anything above junior the manager wants a product that went to manufacturing, with a unit count or a customer type.
- Debug ability. Say how you found a bug, not just that you fixed it. Scope, logic analyser, JTAG trace, printf over UART, a bisect through 300 commits: the method is the signal.
- Constraints you have worked under. Flash and RAM budgets, current draw, interrupt latency, real-time deadlines, safety standards. Firmware is engineering under limits, so the limits belong on the page.
“I can teach a new chip in a month. What I cannot teach quickly is someone who thinks in microseconds and bytes. So I read for constraints. If a CV tells me you fit a stack into 24 KB, or held a control loop under 20 microseconds of jitter, you go to the phone screen even if you have never touched our part.”
Embedded software engineer personal statement examples
Three or four lines at the top. Years, the architecture family, the RTOS or bare metal, the domain, and one number. Skip the career objective unless you are a graduate or changing domain.
Embedded software engineer with 6 years of production C on ARM Cortex-M4 and M7. Writes FreeRTOS applications and low-level drivers for industrial sensors, from board bring-up to signed field updates. Cut firmware footprint 18% on a memory-limited part and holds 100% of the release schedule for the past 7 releases.
Firmware engineer with 9 years on automotive ECUs, including 4 years under ISO 26262 up to ASIL B. Fluent in AUTOSAR Classic, CAN and UDS diagnostics, and MISRA C:2012. Closed 900+ static-analysis findings across two programmes and supported three successful supplier safety audits.
Embedded software engineer with 5 years on Linux systems for NXP i.MX and Raspberry Pi CM4. Writes kernel drivers, device tree overlays and Yocto layers, and owns the OTA update path. Reduced image size 340 MB and boot-to-application time from 22 s to 6 s on a shipping product.
Embedded developer with 4 years on BLE and sub-GHz products using Nordic nRF52 and Zephyr. Focused on battery life and RF reliability: took a wearable from 6 months to 19 months on a CR2032 and cut connection dropouts at 15 m from 4% to under 0.5%.
Electronic engineering graduate (2026) with hands-on C and STM32 work from three university projects and a 6-month industrial placement on motor-control firmware. Built a CAN-connected data logger that ran 400 hours unattended, and writes unit tests with Unity. Looking for a junior embedded role on Cortex-M products.
Firmware experience bullets: weak versions and strong versions
The pattern that works: what you wrote, on what hardware, under what constraint, with what result. Most firmware CVs stop after the first clause.
| Weak | Strong |
|---|---|
| Developed firmware for embedded devices. | Wrote the sensor acquisition firmware in C99 for an STM32L4 transmitter, sampling four 24-bit ADC channels at 1 kHz within a 40 KB RAM budget. |
| Worked with communication protocols. | Implemented a CANopen slave stack that held a 1 Mbps bus with 12 nodes for a 72-hour soak test with no missed frames. |
| Optimised code for performance. | Cut boot time from 1.9 s to 340 ms by moving CRC to the hardware peripheral and deferring non-critical init until after the first sensor read. |
| Debugged issues reported by customers. | Traced an intermittent field fault (roughly once per 4 days) to an unaligned struct access inside an ISR using the J-Link trace buffer, and shipped a verified fix in 9 days. |
| Reduced power consumption of the device. | Dropped average current from 41 uA to 9 uA by disabling a peripheral left running in STOP mode and batching logs to a 1 Hz wake, extending coin-cell life from 6 to 19 months. |
| Followed coding standards. | Took a 90,000-line codebase to MISRA C:2012 mandatory and required compliance, closing 480 findings across two quarters ahead of a functional-safety audit. |
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Embedded software engineer CV skills (and how to group them)
Do not write one long comma list. Group by category so a manager can scan for the row that matters to their job advert, and keep every item something you could be asked about in an interview.
- Languages: C (C99, C11), C++ (11/17), Python for tooling, a little assembly for startup code and ISRs, Rust if you actually use it
- Architectures and parts: ARM Cortex-M0+/M4/M7/M33, Cortex-A, RISC-V, TI C2000, AVR, ESP32, and the vendor families you have shipped (STM32, nRF52, i.MX RT, PIC)
- RTOS and OS: FreeRTOS, Zephyr, ThreadX, embedded Linux, bare-metal super-loop, plus scheduling and priority inversion in interview terms
- Buses and protocols: I2C, SPI, UART, CAN and CANopen, LIN, Modbus, USB (device and host), Ethernet, BLE, LoRa, MQTT
- Tools: GCC arm-none-eabi, IAR, Keil, CMake, Make, Git, GitLab or GitHub CI, Segger J-Link and Ozone, OpenOCD, Saleae or similar logic analyser, oscilloscope, bench supply
- Test and quality: Unity, CMock, Ceedling, GoogleTest, hardware-in-the-loop, static analysis, code coverage, MISRA C:2012
Soft skills matter here in a specific way. Firmware sits between hardware, test and product, so put one line in your experience showing you worked across those groups: a design review you ran, a manufacturing test you handed to production, a field failure you explained to a customer.
Projects, GitHub and what to do if your best work is closed source
Firmware is one of the few software fields where a personal project is genuinely persuasive, because the hardware proves the work. A project section is worth space if you are junior, changing domain, or your paid work cannot be described.
- 1Pick two projects, not six. Depth beats a list of blinking LEDs.
- 2For each one give the board, the language, the interfaces, and a constraint you hit: "nRF52840, Zephyr, BLE plus SPI flash logging, 12 months on 2xAAA measured, not estimated".
- 3Say what went wrong and what you did. A line about a bug you chased with a logic analyser says more than a feature list.
- 4Link the repo and keep the README short with a photo of the board, a wiring diagram and build instructions that work.
Entry-level and graduate embedded software engineer CV
Graduate and entry-level versions are a common search on this job title. The good news is that embedded hiring managers do read student work, as long as the CV looks like an engineer wrote it. Order the page: personal statement, projects, skills, placements or work, education.
- Lead with projects, not education, if you built anything on real hardware. Final-year project, robotics team, a personal board, a Formula Student ECU, an amateur radio build.
- Name the toolchain. "Built in STM32CubeIDE, debugged over SWD with a Nucleo board" tells a manager exactly how far you got.
- Include university modules only when they are specific: microprocessor systems, digital design and Verilog, real-time systems, computer architecture, control systems.
- Any placement or internship counts, even test or manufacturing. Writing the Python script that tests boards on the line is real embedded work.
- Say what you can do without hand-holding: read a datasheet, wire up a UART, write an interrupt handler, use version control.
Electronic engineering graduate seeking a junior firmware role on ARM Cortex-M products. Wrote bare-metal C drivers for I2C sensors and a FreeRTOS data logger in coursework and a personal build, and comfortable with SWD debugging, Git and reading datasheets end to end.
Built a CAN bus data logger on an STM32F4 for the university Formula Student car: 8 channels at 100 Hz to SD card, ran 400 hours across two seasons without a lost session, and wrote the desktop Python parser the team still uses.
Six-month firmware placement: wrote and validated the production test firmware for a BLE handheld, cutting per-unit test time from 6 minutes to 90 seconds across a 4,000-unit build.
Education, standards and certifications that actually matter
There is no licence for this job in the UK, and no single certification hiring managers require. What carries weight is the degree, the standards you have worked under, and security clearance if the role needs it.
- Degree: a BEng or MEng in electronic engineering, computer systems engineering or computer science is the usual entry. List the university, degree, classification and year. Drop the classification after your second job unless it was a First or 2:1 and you are still early.
- Safety and quality standards belong in your experience, not a certificate list: IEC 61508 for industrial, ISO 26262 with the ASIL level for automotive, IEC 62304 for medical devices, DO-178C with the DAL level for avionics. Name only the ones you have genuinely worked under.
- MISRA C:2012 is a coding standard, not a certification. Say you have worked to it and what you did to get code compliant.
- Security clearance: if you hold active SC or DV clearance (UK national security vetting), put it in the top section. For defence firmware roles it is often the first filter.
Format, length and getting past the ATS
- Two pages at most. One page is fine up to about 10 years; use two after that or if you have a long project list in defence or medical. Nobody in this field reads a third page.
- Plain single-column layout, standard section headings, no photo, no date of birth, no graphic skill bars. UK convention. Save as PDF unless the advert asks for Word.
- Put a short skills band near the top with the part families and RTOS. It is the block recruiters keyword-search.
- Mirror the advert's exact words: if it says "firmware engineer" and "Zephyr", write "firmware" and "Zephyr", not "embedded developer" and "RTOS". Applicant tracking systems match strings, not synonyms.
- Use "CV" and UK spelling. If you are applying to a US employer they will call it a resume, but the content is the same and you still leave the photo off.
Frequently asked questions
How do I write an embedded software engineer CV?
Open with a three-line personal statement naming your years, the architecture family, the RTOS or bare metal, and one number. Follow with experience where each job has three to five bullets that state the hardware, the constraint and the result. Add a grouped skills block, then education. One page is enough if you are under about ten years in.
What skills should I put on an embedded software engineer CV?
C is non-negotiable, then C++ and Python for tooling. Add the architectures and parts you have shipped, the RTOS (FreeRTOS, Zephyr, ThreadX or bare metal), the buses (I2C, SPI, UART, CAN, USB, BLE), your debug tools (JTAG/SWD, logic analyser, oscilloscope) and your test setup. Group them by category rather than one long list.
How do I write an embedded software engineer CV as a graduate or with no experience?
Put projects above education and describe them like work: board, language, interfaces, constraint, outcome. A Formula Student ECU, a BLE sensor you built, or a final-year project that ran unattended for days all count. Include any placement or internship even if it was test or manufacturing, and name the exact toolchain you used so the reader knows how far you got.
What is the difference between an embedded software engineer and a firmware engineer CV?
In practice the titles overlap and many companies use them interchangeably. Firmware roles skew closer to the metal (bare metal, drivers, bootloaders, power) while embedded software can include embedded Linux, application layers and connectivity. Use the exact title from the job advert in your headline, and keep the technical content the same.
How long should an embedded software engineer CV be?
One page for the first eight to ten years. Two pages once you have several shipped products, safety-standard work or patents. Do not go past two. If you are cutting, delete old coursework, generic soft skills and any tool you would not want to be tested on.
Do I need certifications to get an embedded software job?
No. There is no required licence or certificate in the UK for this role. Degree, shipped products and debugging ability decide interviews. A functional-safety course (IEC 61508 or ISO 26262) helps for industrial and automotive work, and active SC or DV security clearance matters a lot for defence firmware jobs.
How do I describe work that is under NDA or export controlled?
Describe the class of product and the engineering facts without naming the customer, programme or anything controlled: "a handheld RF instrument for a defence prime, 128 KB flash budget, CAN and USB". Memory sizes, timing figures and standards you worked under are almost always safe. If you are unsure, ask your programme's security officer before you send the file.
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How this page was made: a first draft was written with AI assistance from cvplex's example library, then edited and fact-checked by the cvplex Careers Team. Examples are fictional composites; numbers are illustrative. Report an error via the editorial policy page.