Hire Embedded Firmware Design Designers in Bulgaria

I am an Electronics and Embedded Systems Engineer specializing in firmware development, PCB design, battery management systems (BMS), and hardware integration. I work with STM32 and other microcontro... Read more

I am an Electronics and Embedded Systems Engineer specializing in firmware development, PCB design, battery management systems (BMS), and hardware integration. I work with STM32 and other microcontroller-based systems, developing reliable embedded firmware in C/C++ and integrating sensors, communication interfaces, and peripheral devices using SPI, I2C, UART, CAN, ADC, PWM, DMA, and interrupts. My experience includes schematic and PCB development, board bring-up, hardware debugging, sensor integration, power and battery-related electronics, BMS development, and communication between embedded devices. I can support projects from the initial hardware architecture and component selection through firmware development, testing, debugging, and final system integration. I am comfortable working with real-world embedded systems where hardware and software must be debugged together. I focus on clean firmware architecture, reliable communication, accurate sensor data acquisition, and practical solutions that can be deployed on actual hardware. I can help with: • Embedded C/C++ firmware development • STM32 firmware and peripheral configuration • PCB schematic and board design • Battery Management Systems (BMS) • SPI, I2C, UART, CAN and USB communication • Sensor and actuator integration • GPS, IMU, pressure and environmental sensors • ADC, PWM, timers, DMA and interrupt-based systems • Hardware bring-up and debugging • Existing firmware troubleshooting and optimization • Prototype development and system integration Whether you need to develop a new embedded product, debug an existing board, integrate sensors, or improve firmware reliability, I can provide support from prototype through final implementation.

A reliable electronics engineer and PCB designer with 15+ years of experience (trusted by clients worldwide) in PCB design, schematic capture, hardware development, and manufacturing support. I delive... Read more

A reliable electronics engineer and PCB designer with 15+ years of experience (trusted by clients worldwide) in PCB design, schematic capture, hardware development, and manufacturing support. I deliver production-ready designs that reduce risk, shorten development cycles, and work right the first time. My PCB designs are not only functional but manufacture able, testable, and scalable. With my 100% Job Success Score, I help clients turn ideas into robust, production-ready electronic products. My specialization is in circuit design, schematic capture, multilayer PCB layout, embedded systems, power electronics, RF and microwave circuits and analog circuits. I can do design reviews, hardware development, hardware debugging, reverse engineering, design optimization, troubleshooting and ensure your project is delivered with precision and attention to detail. ⭐ Core Expertise ⭐ ✅ Multilayer PCB designing ✅ PCB design with high speed interfaces, such as LVDS, HS-CAN, CAN FD, RS-422, RS-485, USB 3.0, FPGA high speed SerDes, PCIe, LVPECL, LPDDR4 clock, HDMI ✅ High power PCB design up to 4 layers, 3.2 KW, 320V output at 10A load current ✅ Design for Manufacturing (DFM) & Design for Assembly (DFA) using JLC PCB and PCB way services ✅ EMC / EMI aware PCB design practice using industry standards such as IPC-2221, IEC61188, DO-254 ✅ JLC PCB and LCSC parts selection, finding in-stock components, creating BOM with updated and available parts, finding alternate parts with similar technical specifications ✅ Generating Gerber files, NC Drill files, CPL files, BOM files for production, prototyping & mass manufacturing ✅ Schematic and PCB design review ✅ Circuit Designing, analog, digital, RF, microwave, embedded, high power circuit designing ✅ Circuit Simulation & Analysis ✅ Microcontroller Programming in C language ✅ Reverse engineering from given Gerber files, PCB images, BOM ✅ Problem solving, hardware development, troubleshooting, hardware debugging, design optimization for power, thermal, mechanicals constraints ⭐ PCB Design Software ⭐ ✅ Altium Designer v24 ✅ KICAD v9 ✅ DIP TRACE ✅ EasyEDA ⭐ Circuit Simulation Software ⭐ ✅ LTspice ✅ Proteus ✅ Multisim ✅ Keysight ADS ✅ Ansys HFSS ⭐ Programming ⭐ ✅ MPLAB X IDE ✅ C Language ✅ MATLAB SIMULINK ⭐ 3D Mechanical Design ⭐ ✅ SolidWorks ✅ PTC Creo ✅ Flow Therm ⭐ Power & analog circuit Projects ⭐ Power electronics, op-amp circuits, ADC/DAC interfaces, signal conditioning, piezo electric transducer driver, flyback converter, buck boost converter, laser diode driver, LED light driver, constant current and PWM control of LED lights, Switch Mode Power Supply (SMPS) design, linear power supply design, switching transformer magnetics design, AC load control using TRIAC, DC load control using SCR, H-Bridge driver for BLDC motor control using high power MOSFETS, gate driver circuit, multivibrator circuit using 555 timer, counter circuits, relay control, IGBT circuit for DC to AC inverter, bridge rectifier circuit for AC to DC converter ⭐ Industrial Projects ⭐ Temperature, humidity, weight, pressure sensors circuit design for instrumentation electronics, data logging, real time telemetry monitoring, signal conditioning circuit, feedback control circuits, robotics and actuator control, solenoid valve for flow control, PLC, DCS, SCADA for industrial automation, ⭐ RF Projects ⭐ X-Band and S-Band microwave RF power amplifier using GaN and GaAs devices, preamplifier, Directional coupler, band pass filter, Wilkinson divider, diplexer, microstrip transmission lines impedance matching, Low Noise Amplifier (LNA), mixer, microstrip patch antenna, electronic beam steering T/R modules, I/Q modulator, phased array circuits ⭐ Audio Projects ⭐ Audio Electronics: Amplifiers, filters, DSP-based audio processing, low-noise analog design, analog crossover network, equalizer, stereo and mono dual channel amplifier, phono preamplifier, hydrophone amplifier, MEMS based microphone array design, electret microphone amplifier, CODEC, RCA to XLR converter, phantom power supply, audio power amplifier for 8 and 4 ohm loud speakers, ⭐ Digital Electronics Projects ⭐ Digital logic circuits using discrete ICs, sequential circuit, NAND Flash memory circuit, mixed signal circuit using RF transceiver blocks with SMA connectors, FMC HPC connectors, high speed signaling with FPGA Actel, Xilinx, DSP controller from microchip, microcontrollers from Silabs, PIC, ATMEL C8051, ATMEGA, TMS320F28335, ESP32-C5, ESP32-S3, STM32, RPI, ARDUINO ⭐ Why Clients Choose Me ⭐ ✅ End-to-End Capability — from concept → schematic → PCB → firmware → prototype. ✅ High-Speed PCB Specialist —Impedance controlled routing and EMC/EMI aware designs ✅ Strong Communication — clear documentation, regular updates, and fast responses. ✅ Proven Track Record — 15+ years of hands-on design experience. ✅ Client Satisfaction — long-term ▒▒▒▒▒▒ client relationships, repeat contracts, and 5⭐⭐⭐⭐⭐ feedback

✅ 100% Client Satisfaction ✅ Top Embedded and Firmware developer ✅ Top Hardware designer ✅ Top Software design ✅ Top Mechanical design and industrial design ✅ Top Enclosure design Services: 1)... Read more

✅ 100% Client Satisfaction ✅ Top Embedded and Firmware developer ✅ Top Hardware designer ✅ Top Software design ✅ Top Mechanical design and industrial design ✅ Top Enclosure design Services: 1) Hardware/Electronics design (Power, Analog, Digital/High-speed and RF electronics design) 2) Precertification testing (EMI, ESD, EMC, FCC, CE, UL) 3) Firmware design С/C++ (Bare metal MCU/MPU, FreeRTOS, Zephyr RTOS, Embedded Linux, Wireless protocols, Security, Interfaces, etc) 4) Industrial and Mechanical design (Enclosure design, 3D printing, IP standards, Prepare all for injection molding, etc) 5) UX/UI design (Embedded devices with displays, Mobile and Desktop applications) 6) Software design (Android, IOS, Linux kernel and user space development) 7) Embedded Quality Assurance(QA) and testing 8) Manual verification/testing PCB/FPC, functional and unit testing of the Firmware/Software, stress testing, temperature range testing Service->Hardware design service: - Power electronics design: (PFC, Solar charging controller, chargers, high voltage control, Motor controllers DC/AC/BLDC ) - Analog electronics design: High-accuracy analog measurements, Noise filtration, Digital to analog conversion, Amplifying signal - Digital and high-speed electronics design: - Memories DDRx/LPDDRx, SDRAM, Camera and display interfaces (MIPI-DSI, MIPI-CSI, DisplayPort, etc), Data communication interfaces (QSpi, SPI, UART, I2C, FMC, I2S, USB 2/3.x, etc), ( - RF Designs: ( 50-60 GHz (Radars), 1-6 GHz (UWB, Wifi, BLE, ZigBee, GPS, NB-IoT, LTE-M/LTE, Z-Wave, etc), 13,6 MHz, 128 kHz (NFC, RFID, etc), 433 MHz (Custom protocols) Service->Industrial and Mechanical design - Industrial design of the sketch - it includes a few sketch designs, depending on the physical sizes of the device, specific of industry and user experience - Mechnical CAD design with deep PCB integration - it includes full mechanical draw based on the industrial design with detailed sizes, materials and manufacturing specific. - Thermal calculation and simulation - it includes simulation of the heating device inside enclosure, with theoretical cooling calculation - 3D printing and verification - we use 3D printer hp jet fusion 5210, with a very nice quality of printing, that helps us to make a good verification of parts with PCBs - Injection molding - the last step, which includes manufacturing optimization and making pres forms, preparing documentation for the manufacturing Service->Firmware design С/C++: - Languages: C/C++, Assembler - Diagrams: Block, UML, Workflow, APIs - Interfaces: I2S, SAI, MIPI-DSI, MIPI-CSI, USB 2/3.x, LTDC, DDR3/DDR4/LPDDR4, I2C, SPI/QSPI, UART, CAN, Ethernet - Wireless: NB-IoT, LTE M, GPRS, GPS, LTE, UWB, WiFi, BLE, ZigBee, Z-Wave, LoRa, Thread, 6LoWPAN, Sub 1GHz, NFC (13,6 MHz), RFID 433 MHZ and 128 kHz - Protocols : MQTT, HTTP, FTP, Modbus TCP/RTU, SNMP, TCP/IP, UDP/IP, DLMS, custom protocols - Security: AES, SSL/TLS, custom algorithms - Libs and frameworks: TouchGFX (GUI lib for MCU), emWin (GUI lib for MCU), LVGL (GUI lib for MCU), WolfSSL (SSL/TLS), Mbed TLS(SSL/TLS), osxMotionFX (Sensors fusion algorithm based on the Kalman theory), FatFS, lwIP (TCP/IP stack), WICED (Wifi stack), aws/amazon-freertos, Paho MQTT, TensorFlow - Embedded OS: FreeRTOS, TI-RTOS, ZephyrOs, Embedded Linux, Yocto, ROS - MCUs: NXP (i.MX RT1064, LPC1100, LPC4000), Nordic (NRF52xx/NRF53xx/NRF91xx), TI (CC3220/CC26xx/CC1100/CC3200, MSP430), Espressif (esp32, esp8266), ST(STM32H7/F7/F4/L4/F0/L0/WB/WL/G0 and STM8), Atmel/Microchip(SAM D20/D21/L21/R21/V70/V71, SAMA5/SAM4/SAMD4), Silicon Labs(EFR32, ZGM130S), Cypress (PSoC 3/PSoC 4), Kinetis (Family MK81FN256VDC15), Holtek (HT68xx) - MPUs: Analog Devices (ADSP-2156x SHARC), Qualcomm (Snapdragon 625/425/610/845), Allwinner (A64, A33, H3, H6 series), NXP (I.MX6/I.MX7/I.M8) , ST(STM32MP1) - SOMs: NVIDIA Jetson nano, NVIDIA Jetson Orin Nano, NVIDIA Jetson AGX Orin, Toradex (Colibri iMX6, IMX7, IMX8), Raspberry pi (CM3, CM4 modules), Inforce (Qualcomm Snapdragon 410, 820, 845 SOM), 8devices (Mango on Qualcomm IPQ6000/IPQ6010 Soc), Sensiedge(SensiBle 1 and 2, SensiLora) Service->Software: - Languages: Java, Kotlin, C#, C/C++, Python, Java Script - Diagrams: Block, UML, Workflow, APIs - Interfaces: USB, Ethernet - Protocols : MQTT, HTTP, FTP, Modbus TCP/RTU, SNMP, TCP/IP, UDP/IP, DLMS, custom protocols - Wireless: BLE, WiFi, UWB - Security: AES, SSL/TLS - Libs and frameworks: GStreamer, Paho MQTT, WolfSSL (SSL/TLS), Mbed TLS(SSL/TLS), QT framework, Xamarin Forms and Maui, ASP .NET Core and web development, React (web UI development), SQLite DB, FireBase DB, Mong DB, InfuxDB DB, Room, TensorFlow, Node.js - OS: Android, IOS, Linux, Windows