Firmware development services
Firmware development services for microcontrollers: bare-metal and RTOS firmware in C, C++ and Rust, drivers, Bluetooth and wireless stacks, bootloaders and field updates, automotive ECU firmware, motor control and battery management, and low-power design for wearables, sensors, meters, appliances, vehicles and medical devices, with dedicated firmware engineers for your team or projects delivered end to end.
Firmware we develop
Microcontroller firmware
Bare-metal, Zephyr, FreeRTOS or Eclipse ThreadX firmware for STM32, Nordic nRF52, nRF53 and nRF54, ESP32, NXP, Renesas, Infineon, Microchip and Silicon Labs parts, using the vendor SDK where it saves time and wrapping it where it would tie you to one chip.
Peripheral and sensor drivers
I2C, I3C, SPI, UART, CAN, ADC and DMA drivers for sensors, displays, motors and radios, each tested against a simulated or recorded device before it meets the real one.
Wireless protocol firmware
Bluetooth Low Energy and LE Audio, Wi-Fi, Thread, Matter, Zigbee and LoRaWAN stacks configured and extended on the chip, and cellular modems driven over AT commands or LwM2M, ready for Bluetooth SIG qualification and Matter certification.
Bootloaders and field updates
MCUboot or a purpose-built bootloader with signed images, two slots and rollback, so an update cut short by a flat battery leaves the device on its last good version.
Low-power and wearable firmware
Fitness bands, health patches, earbuds and sensors that run for months on a small battery: sleep modes, wake sources and radio duty cycles tuned against a power profiler trace, so the battery life printed on the box is a measurement rather than an estimate.
Motor control, power and battery firmware
Field-oriented control for BLDC and stepper motors, battery management with cell balancing and state-of-charge estimation, and control firmware for chargers, solar inverters and energy storage, with the control loops tuned in simulation before they drive real hardware.
Automotive ECU firmware
Classic AUTOSAR basic software and application components on Infineon AURIX, NXP S32K and Renesas RH850 controllers, CAN FD, LIN and automotive Ethernet communication, and UDS diagnostics, written to MISRA C and the ISO 26262 safety level your item calls for.
Audio, DSP and on-device machine learning
Audio and sensor signal processing with CMSIS-DSP or on Cadence Tensilica and Analog Devices SHARC cores, and keyword spotting, gesture and anomaly models running on the microcontroller through LiteRT for Microcontrollers or Edge Impulse.
Safety-critical and fault-tolerant firmware
Firmware for medical devices, appliances and industrial safety functions written to MISRA C and the rules of IEC 62304, IEC 60730 or IEC 61508, with watchdogs, fault handlers that keep a crash record across the reset, and code coverage measured to the level the standard asks for.
Hire firmware engineers
Dedicated firmware engineers
Firmware engineers who join your team full time, work in your tools and process, and report to your lead. You interview them; we carry the Ukrainian contract, payroll, invoicing and leave.
Firmware development projects
A defined piece of firmware development with a scope, a fixed plan and a named lead on our side who owns the result and reports progress in your channels.
Ongoing firmware development
Firmware development as a continuing service: the same people every month, a backlog you prioritise, and hours you can see in our portal and on the invoice.
The dedicated team page explains how specialists join your team, and the outsourcing page covers project delivery, take-overs and how we charge.
Who works on your firmware development
Firmware engineers
C, C++ and Rust on microcontrollers
Automotive firmware engineers
Classic AUTOSAR, CAN and UDS diagnostics
Hardware engineers
Schematics and bring-up of the board the firmware runs on
Embedded QA engineers
Hardware-in-the-loop tests and fixtures
Mobile engineers
iOS, .NET MAUI and React Native companion apps
How we write firmware
Most firmware can be tested without the board, so we write it that way: hardware access sits behind thin interfaces, the logic above them runs as unit tests on the build machine in Unity, Ceedling or GoogleTest, and Renode runs the whole image on emulated hardware in the pipeline. Static analysis checks the MISRA C or CERT C rules where your product calls for them, compiler warnings are errors, and every release image is built from a tagged commit by the pipeline and signed there.
Hardware reaches the engineer in one of two ways: development kits and prototype boards are sent to them, or they work on a rack in your lab through remote power switching, a debug probe and a serial console over your VPN. Either way the build runs in your pipeline and the code lives in your repositories.
Other embedded and hardware services
Embedded software development
Embedded software development services: embedded Linux, Android and RTOS, drivers, BSPs, automotive, network, audio and video software and secure updates, with dedicated embedded software engineers or project delivery.
FPGA development
FPGA development services: RTL design in SystemVerilog and VHDL, FPGA and ASIC verification, SoC FPGA, video, networking, data acquisition and acceleration, with dedicated FPGA engineers or project delivery.
Hardware and PCB design
Hardware and PCB design services: schematics, multilayer and HDI layout, high-speed, RF, analog and power design, EMC preparation and production files, with dedicated hardware engineers or project delivery.
IoT development
IoT development services: connectivity, provisioning, cloud platforms on Azure or AWS, fleet updates, industrial IoT, asset tracking, EV charging, dashboards and apps, with dedicated IoT developers or project delivery.
Embedded and hardware testing
Embedded and hardware testing services: device testing, hardware-in-the-loop rigs, firmware automation, automotive ECU, connectivity and security tests, with dedicated embedded QA engineers or project delivery.
Robotics software
Robotics software development services on ROS 2: perception, navigation, motion planning, robot control, industrial cells, autonomous vehicles and fleet software, with dedicated robotics engineers or project delivery.
Questions about firmware development
Can firmware work start before our hardware is ready?
Yes. Work starts on the development kit for the chosen microcontroller and in Renode, with drivers written against the datasheets of the parts on your schematic, so the first prototype boards are brought up with firmware that already exists rather than starting from nothing.
C, C++ or Rust for our firmware?
C when the vendor SDK, the existing code or your certification evidence is in C. C++ for larger firmware that gains from types and templates without heap allocation. Rust, with Embassy and embedded-hal, for new firmware where memory safety matters and the microcontroller is well supported; Rust is already the language of our own desktop software. We recommend one per product before the first line is written.
Which industries do your firmware engineers work in?
Consumer electronics and wearables, in fitness bands, earbuds, appliances and smart home sensors; industrial and energy equipment, in motor drives, battery management systems, meters and chargers; automotive, in body, comfort and powertrain ECUs and e-bike and e-scooter controllers; medical and health devices, in glucose monitors, infusion pumps and hearing aids; security products, in alarm sensors, smart locks and access readers; and telecom, in modems and radio modules.
How quickly can firmware engineers start?
When the right firmware engineer is available, the start is gated only by your interview and the NDA and IP assignment. Otherwise we run a search, which typically produces candidate profiles within two to three weeks, and nobody starts until you have said yes.
How do we hire firmware engineers through BigTree108?
Tell us the work, the seniority and the hours you need. We propose one or two people with their profiles, you interview them the way you would interview your own hire, and you sign one agreement with BIG TREE 108 LLC and receive one invoice a month.
Who owns the work they produce?
You do. Every specialist has a signed contract with BigTree108 that assigns all work product to the company, and our agreement with you assigns it onward. Code, designs and documents are delivered into your own repositories and tools, not kept where only we can change them.
Need firmware written or fixed?
Tell us the microcontroller, the toolchain and what the device has to do. You get an answer within one business day: a plan for the firmware, candidate profiles, or a review of the existing code.