I'm an Embedded Engineer with 10+ years of experience designing production-ready embedded hardware, RF systems, and multilayer PCBs for industrial, IoT, robotics, automotive, and consumer electronics products. I help startups and companies transform ideas into reliable prototypes and manufacturable products. My expertise covers the complete hardware development cycle, including system architecture, schematic capture, PCB layout, embedded firmware, prototype bring-up, testing, and manufacturing support. My expertise includes: • Embedded hardware design (ESP32, STM32, Nordic nRF, RP2040, NXP, Microchip) • RF PCB design (WiFi, BLE, LoRa, Zigbee, UWB, LTE/5G, GNSS) • Multilayer PCB layout (2 to 12+ layers) • High-speed interfaces (USB, Ethernet, PCIe, CAN/CAN-FD, MIPI, DDR) • Mixed-signal, analog, digital, and power electronics • Battery-powered and low-power embedded systems • EMC/EMI-aware PCB layout and signal integrity • Prototype bring-up, debugging, validation, and DFM review Design Tools • Altium Designer • KiCad • EasyEDA Pro • OrCAD / Allegro • Eagle CAD Firmware Development • C / C++ • ESP-IDF • STM32CubeIDE • FreeRTOS • Bootloader development • Peripheral drivers (SPI, I2C, UART, USB, CAN, Ethernet) I've developed custom hardware for wireless IoT devices, industrial automation, robotics, sensor platforms, wearable electronics, medical devices, battery-powered products, and edge AI systems. My designs prioritize reliability, manufacturability, and long-term product support. Whether you need a complete embedded system, RF PCB, hardware review, or manufacturing-ready design, I can support your project from concept through production with clear communication and practical engineering solutions.

Looking for challenging new projects which can effectively use my talents and creativity, to generate cost effective software solutions. I'm a world class C programmer (primarily on Unix/Linux) and I'm used to making "impossible" tasks "possible". I have a great deal of expertise in: * real time embedded systems * cross compilation/software construction * source control * network programming * system administration * kernel level programming/device drivers * image processing * performance and metrics

I have been working in the field of embedded systems for about 10 yrs. With embedded systems, i mean both Microcontrollers and application processors that are used to build Single Board Computers (SBC). I have worked with many microcontrollers like PIC, AVR, STM32F1xx, STM32F2xx, STM32F4xx, STM32F0xx, LPC1768, TIVA-C, MSP430, OMAP l138, ESP32, ESP8266 and DA1458x. Also, i depend in many projects on SBC like raspberry pi, beagle board, orange pi, nano pi and tiny rex. I can use multiple languages for programming according to the platform used in the project. I have a great experience in programming with C, C++, embedded C, python, bash and perl. In addition to the field of embedded systems, i am very curious with security in any project i work in. I have a master degree in Cryptography in broadcast encryption. I tries always to follow security mechanisms in my solutions. I can afford security solution for the projects to keep data safe from unauthorized disclosure specially in network projects or projects that requires TCP communication.

IoT & Embedded Systems Developer | ESP32 · Arduino · Raspberry Pi I help founders, engineers, and product teams turn ideas into fully functional, market ready IoT products through my agency Null Labz, a specialized studio focused on embedded systems and connected device development. WHAT WE DELIVER AT NULL LABZ ? Embedded Systems Development : Custom firmware and hardware engineered for real-world deployment not just demos. Built to last in the field. IoT Infrastructure & Seamless Integration : End-to-end connectivity using MQTT, REST APIs, CoAP, LoRaWAN, GSM, and AMQP — integrated with scalable cloud systems. Rapid Prototyping & Market-Ready Deployment : We take your concept through PCB design, circuit prototyping, and firmware development to deliver a shippable product fast. ✅ ESP32 / ESP8266 & Arduino Firmware Development ✅ Web Server Development on ESP32/ESP8266 ✅ Sensor & API Integration ✅ Protocols: MQTT, HTTP, CoAP, GSM, AMQP, LoRaWAN ✅ Circuit Design & PCB Design ✅ Rapid Prototyping ✦ Full-cycle delivery — I handle the full product arc from schematic to deployed hardware. ✦ Agency-backed depth — through Null Labz, I bring a dedicated team approach to complex IoT projects. ✦ Clear communication — I keep you informed at every stage so there are no surprises at handoff. ✦ Real-world focus — every solution is built with deployment, reliability, and scalability in mind from day one. Let's connect whether you need a proof of concept prototype or a production ready connected device, Null Labz has you covered.

✔ IoT Solution Leader | Leading a team of 220+ engineers ✔ 11+ Years in connected products | End-to-end IoT development ✔ Hardware + Firmware + Cloud Expertise Drop me a message with “DISCOVERY” - we’ll run a free discovery session and turn your idea into a clear architecture, timeline, and execution roadmap while avoiding costly mistakes early on. I lead a 220+ engineer team specializing in end-to-end IoT development – from early discovery and architecture to prototyping, production preparation, and long-term product evolution. Over the last 11+ years, I’ve been involved in building connected solutions that combine embedded systems, electronics, firmware, cloud platforms, and user apps (web, mobile, desktop). My role is focused on bridging business goals with engineering reality: helping teams validate ideas, select the right architecture, reduce technical risks, and build products that can successfully move from prototype to production. Core expertise: • IoT system architecture Designing complete connected ecosystems: devices, communication layers, cloud infrastructure, data flows, APIs, and user applications. • Embedded systems & firmware MCU/MPU-based development, RTOS, embedded Linux, device drivers, hardware communication protocols, low-power optimization, OTA updates. • Hardware development & prototyping Electronics design, schematics, PCB development, hardware bring-up, testing, validation, and preparation for mass production. • Connectivity & communication BLE, Wi-Fi, LoRaWAN, LTE/cellular, MQTT, sensor integration, and reliable device-to-cloud communication. • IoT cloud platforms AWS IoT, device management, telemetry pipelines, real-time monitoring, analytics, and scalable backend architectures. • Connected applications Web dashboards, mobile apps, desktop applications, admin portals, device management platforms, and third-party integrations. Typical IoT products I work with: • Industrial IoT & Industry 4.0 Connected machinery, predictive maintenance, industrial automation, sensor networks, and remote monitoring. • Smart Home & Building Automation Connected devices, automation platforms, energy management, and intelligent control systems. • Healthcare & Wearables Connected medical devices, monitoring solutions, wearable ecosystems, and compliance-focused development. • Energy & Infrastructure Smart metering, energy monitoring, telemetry systems, and remote control solutions. • Location-based products GPS tracking, asset tracking, fleet monitoring, and safety-focused connected devices. • Robotics & Drones UAV/UGV/UAS platforms, telemetry, control systems, and autonomous solutions. Selected project experience: • GPS tracking ecosystem Built a connected solution combining hardware devices, firmware, cloud infrastructure, mobile applications, and management dashboards for real-time tracking and alerts. • Wearable safety platform Developed an IoT wearable ecosystem with embedded software, wireless connectivity, cloud services, and user-facing applications. • Industrial monitoring solution Created a sensor-based platform for collecting operational data, processing telemetry, and providing actionable insights through dashboards. Why clients work with me: • Strong industrial and commercial product development experience I work with complex products where reliability, scalability, security, and real-world constraints matter. • Ability to handle both hardware and software challenges IoT success depends on how all system components work together - not isolated development tasks. • Clear communication and structured development process Transparent milestones, technical documentation, predictable execution, and clear ownership at every stage. • Focus on practical solutions I help teams avoid unnecessary complexity and choose architectures that fit actual product goals. • Long-term support mindset Project scope for reference: Phase 01 – Definition & Architecture: $15k–$25k Discovery, requirements analysis, system architecture, technology selection, and roadmap creation. Phase 02 – Prototype & Validation: $35k–$120k Hardware prototypes, firmware, cloud infrastructure, applications, testing, and product validation. Phase 03 – Production Readiness: $60k–$250k+ Production optimization, manufacturing support, certification preparation, scalability improvements, and deployment. My approach: I don’t start with coding. I start by understanding the product vision, business goals, technical constraints, and future scaling requirements. The goal is to create IoT systems that work reliably in real-world conditions, avoid expensive redesigns, and provide a strong foundation for future growth. If you’re building a connected product involving hardware, firmware, cloud, or device management - feel free to share your idea. I'm ready to help evaluate the technical approach and identify the most practical path forward. Worth a chat?

Principal Embedded Firmware Engineer specializing in nRF91 (nRF9160), nRF52, nRF70, STM32,ESP32 & Zephyr RTOS for low-power IoT devices. I help companies design and build reliable, production-ready connected devices — from prototype to mass deployment — with a strong focus on power optimization, connectivity, and scalability. ✔ Low power IoT device development ✔ Experience in Embedded Firmware design and architecture (design patterns, reliability and multithread) ✔ CE,FCC certification ✔End-to-end product development (Architecture → Firmware → Cloud → Production) ✔100% Client Recommendation 10+ years of full embedded development life cycle, including coding/standards, code reviews, source control management, build processes, testing, and operations experience. Experience in leading an engineering team. Core Expertise: • Embedded C, C++, Python • Zephyr RTOS, Matter (ConnectedHomeIP) • LTE-M, NB-IoT, 4G/5G • Power profiling, debugging (logic analyzer, oscilloscopes) • Secure firmware & cybersecurity analysis Hardware & Technologies: • Nordic SoCs: nRF9160, nRF52840, nRF52833, nRF5340, nRF70, nRF54 series • Cellular modules: Quectel, SIMCom • UWB (Decawave), GPS, Cell-based positioning • ESP32, Raspberry Pi, ARM Cortex-M systems 💡 What I deliver: • Ultra-low power device optimization & battery life tuning • Secure IoT connectivity (MQTT, HTTP, TLS, mutual authentication) • Zephyr RTOS & nRF Connect SDK based development • Sensor integration (I2C, SPI, UART, ADC, CAN, RS485) • OTA / FOTA firmware update systems • AWS IoT Core (Device provisioning, Shadow, OTA Jobs, Lambda, DynamoDB) • Board bring-up, debugging & production support 🚀 Selected Projects: • Medical wearable device (BLE + IoT gateway + ultra-low power) • NB-IoT / LTE-M asset tracking system with GPS & cloud integration • Smart sensor platform for environmental & industrial monitoring • AI/ML edge device (YOLOv5, MediaPipe, Edge Impulse) • Sound pressure level (SPL) monitoring device • Production test fixtures for firmware flashing & validation OBD-II and Automotive CAN Bus Experience: • OBD-II protocol development • Automotive CAN bus communication • CAN message transmission and reception • DBC file parsing and signal decoding • OBD PID data handling • Vehicle speed, VIN, mileage, and DTC decoding • MCP2515 CAN controller integration • CAN transceiver integration • CAN and OBD simulator development • Bench testing without a physical vehicle • CAN debugging using PCAN and CAN analyzers • Experience with Nordic nRF91, nRF52, ESP32, and embedded C/C++ ⚡ Why clients work with me: • Strong architecture & problem-solving skills • Experience leading engineering teams • Focus on real-world deployment (not just prototypes) • Clean, maintainable, and scalable firmware design

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'm an Electrical and Power Electronics Engineer with over 15 years of hands-on experience in embedded systems, PCB design, SMPS, LED lighting, and industrial automation. My expertise spans microcontroller programming, PLC systems, CNC machine control, and the full development lifecycle of electronic devices - from concept to production and QA. Currently serving as the Quality Control consultant at an LED manufacturer, I've led initiatives that improved product durability, introduced rigorous testing protocols, and enhanced production reliability. I also bring a solid freelance background in custom electrical solutions, including smart home devices and high-precision CNC programming. Highlights: * Embedded systems & PCB design (AVR, SMPS, RF systems) * Industrial automation (PLC, CNC, Pick and Place) * LED drivers & lighting systems (custom testing tools, high/low PFC) * Mold design, aluminum extrusion, and mechanical integration

✅TOP RATED PLUS Firmware and Hardware Developer ✅ 100% Job Success Rate ✅12+ years of experience in PCB Design - 1000+ PCB developed ✅8+ years of experience in Hardware Development - 45+ Products Developed ✅6+ years of experience in Firmware Development - 400+ codes developed and modified ✅Power Electronics, High-Speed Signals, FPGA, EMI/EMC ,UL Compliance Hi, I'm Neel Shah, an architect of innovative technology products with expertise in IOT and embedded systems. With over 11 years of experience as an Electronics Engineer, I specialize in PCB design, Hardware and Firmware development. Throughout my career, I have successfully designed over 1000 PCBs and developed 400+ firmware codes for a wide range of products, including smart home automation, consumer electronics, Space applications, EVs, and so on! Please review my portfolio, which showcases my past projects, achievements, and a satisfied client base. My commitment lies in understanding your specific requirements and delivering exceptional results. Let's connect and discuss how I can contribute to your success! Best regards, Neel Shah

I help startups, researchers, and businesses transform ideas into working hardware products. I specialize in complete hardware product development, from concept and PCB design to firmware development, testing, and deployment. Over the years, I have worked on embedded systems, industrial automation, AI-powered edge devices, RF systems, and IoT solutions using STM32, ESP32, NVIDIA Jetson, and various sensors and communication technologies. My goal is simple: To deliver reliable, production-ready solutions instead of just code. I can help you with: • Embedded Firmware Development (STM32, ESP32) • PCB Design and Hardware Development • Hardware Prototyping • Industrial Automation Systems • IoT Product Development • Sensor Integration • RF and SDR Development • AI Edge Deployment using NVIDIA Jetson • Computer Vision Systems • Testing and Validation • Debgging Existing Products • Documentation and Manufacturing Support Whether you need a proof-of-concept prototype or assistance bringing a product closer to manufacturing, I can support the entire development process. Let's discuss your idea and turn it into a working product.