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Embedded systems engineer with hands-on experience across the full product stack — from hardware design and firmware to wireless connectivity and companion apps. I've built and shipped real products along with a variety of prototypes and proofs. **Core Skills:** • Microcontroller firmware (ARM Cortex-M, Nordic nRF series, STM32, ESP32) • Wireless stacks — Wi-Fi, BLE, sub-GHz • Network protocols - MQTT, CoAP, REST, HTTP • PCB design, schematic capture, and hardware bring-up • Mobile & wearable companion apps — iOS, watchOS, Garmin Connect IQ • IoT system integration — cloud connectivity, OTA Firmware, device management • Embedded Linux — Raspberry Pi, single-board compute, display pipelines I work best with startups and product teams who need an engineer that can own a problem end-to-end — from silicon to the app that talks to it.

I am a Senior Embedded Systems Engineer with strong experience in firmware development, PCB design, IoT systems, embedded Linux, robotics, industrial automation, and edge AI. I help clients turn ideas into reliable products by handling the full development process from architecture and component selection to schematic design, PCB layout, firmware, testing, debugging, and production ready documentation. My core expertise includes: - Embedded Firmware: C/C++, STM32, ESP32, nRF52, RP2040, FreeRTOS, Zephyr, bare metal firmware - PCB & Hardware Design: KiCad, Altium, schematic design, PCB layout, BOM, Gerbers, DFM, debugging - Embedded Linux: Yocto, Buildroot, device tree, Linux drivers, bootloaders, system integration - IoT & Wireless: BLE, Wi-Fi, LoRa, Zigbee, MQTT, TCP/IP, OTA updates - Industrial & Automotive: CAN, CAN-FD, RS-485, Modbus, J1939, UDS, PLC/SCADA integration - Robotics & Control: motor control, BLDC/FOC, sensor fusion, real time control, ROS 2 - Edge AI: TinyML, TensorFlow Lite Micro, Edge Impulse, computer vision, sensor based AI - Desktop Tools: Qt/C++, Python automation, serial/CAN tools, test software, firmware update utilities - FPGA Support: Verilog/VHDL basics, FPGA integration, high speed data acquisition support I can support projects such as: - Custom IoT devices - Sensor based embedded products - Wearable electronics - Industrial controllers - Robotics systems - Automotive CAN devices - BLE/Wi-Fi connected products - Embedded Linux gateways - PCB redesign and hardware debugging - Firmware rescue and prototype bringup I focus on building systems that are reliable, testable, manufacturable, and easy to maintain. Whether you need a prototype, firmware fix, PCB redesign, or complete embedded product development, I can help move your project from concept to working hardware. Thank you for visiting my profile. If you're looking for an experienced Embedded AI & IoT Engineer who can help turn ideas into reliable products, I'd be happy to discuss your project. I look forward to working with you.

I am a Principal Design and Firmware Engineer with over 20 years of experience in electronic and embedded systems design. complete engineering designs dot com My expertise spans RF technology, networking, and low-power battery applications. I excel in taking projects from concept to rapid prototypes in a short period of time the to high-volume production, ensuring that every detail aligns with client specifications and industry standards. My strong communication skills facilitate collaboration across teams, while my problem-solving abilities drive innovative solutions. I specialize in neural network training and prediction, providing cutting-edge insights to enhance product performance. If you need a seasoned engineer who can deliver reliable, efficient designs and scale your technology projects seamlessly, let's discuss how I can contribute to your success.

I am a Firmware Engineer with 8 years of experience working on products in industries such as automotive, agriculture, medical, and consumer electronics. My main area of expertise is IoT, using technologies such as LTE, BLE, and WiFi to create connected devices. I am most proficient with ESP32 and STM32 microcontrollers, but I also have experience working with PIC, AVR, and TI microcontrollers.

I’m Steven Calinski, an Embedded Systems & Firmware Engineer with a passion for solving problems using software or hardware designs. I have a strong background in electrical testing as well as embedded firmware development. I’ve worked on critical embedded projects for fire alarm systems, mobile computing hardware, RF designs, and IoT applications, handling everything from firmware development to EMI mitigation, component level debugging, production testing, schematic design, and board layouts. Languages: C, C++, C#, Python, VHDL RTOS: FreeRTOS, Zephyr RTOS MCU Experience: STM32: F7, H7, H5, H4, Atmel SAM E, Renesas RA, TI MSP430, Silicon Labs, ESP32, ESP32-S3 Firmware Debugging & Optimization: USB, I2C, UART, SPI, PWM, DMA, MQTT, Cellular Network, Current limiting, Power, Battery backup switching, driver creation. I have a background in electrical test engineering as well and am comfortable with hardware troubleshooting, rework, repair, etc. I have a basic rework setup in my home. I am very familiar using Saleae logic analyzer, and oscilloscope to address signal integrity issues. Automated Test Development: LabVIEW applications for engineering & regulatory testing, ESP32 IOT projects for test automation. PCB Schematic Capture & Layout: Cadence Allegro, KiCad, Eagle Board Bring-Up & Component-Level Debugging: Rapid prototyping and validation Microcontroller & RF Circuit Design: Sub-1GHz RF design, BLE integration Click "Invite to Job" or "Hire Me", and let me help you develop your next project.

I build two things that rarely come from the same person: embedded hardware that ships, and AI systems that run real businesses. On the hardware side, I design end to end. Custom PCB in EasyEDA through JLCPCB manufacturing (BOM, Gerber, CPL), then the firmware that runs on it: ESP32 S3, C3 and C6, FreeRTOS dual core architecture, BLE, WiFi, MQTT, OTA updates, ultra low power design. Seven custom boards manufactured with full SMT assembly, 10K+ lines of production firmware, one patent filed with 226 claims on adaptive battery management with Edge AI, and a published research paper on wireless power infrastructure. On the AI side, I build agents that do real work, not demos. I currently run an autonomous business agent in production for a service business: it handles customer conversations on WhatsApp, books appointments through calendar integration, reads payment receipts with vision AI, and reconciles the money at the end of the day, with a human takeover bridge through Telegram. Multi tenant architecture, ready to onboard new businesses. I also build algorithmic trading systems with full ML data pipelines, where every strategy is validated against out of sample data before it touches a live account. What clients get from me: someone who understands the whole chain. The sensor, the board, the firmware, the radio, the backend, the AI layer, and the business result it has to produce. I flag risks early, I document everything, and I deliver with receipts, build footage and handover docs the client can actually use. Recent work: BLE triggered hardware prototype delivered ahead of schedule with same day milestone approval, and a LoRa ski tracking device on Heltec hardware