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STM32/ESP32 Embedded & Hardware Engineer | IIoT Firmware + PCB Design I help companies, startups, and individual clients build reliable STM32/ESP32-based embedded and IIoT products, covering both firmware and hardware — from concept to production-ready systems. My core expertise is STM32/ESP32 firmware development in C / Embedded C using FreeRTOS, combined with schematic and PCB design for connected devices (power, MCU, sensors, relays, and interfaces). I focus on stable, production-grade systems with attention to power integrity, real-time behavior, connectivity reliability, and edge-case handling. Typical deliverables: – STM32/ESP32 firmware (FreeRTOS, Wi-Fi, BLE, MQTT) – Hardware-aware firmware (startup, brown-out, watchdogs, EMI considerations) – Schematic & PCB design ready for manufacturing – Clean, maintainable code and documented designs suitable for long-term products In parallel, I am actively expanding projects using Nordic nRF (BLE), and Raspberry Pi, applying the same system-level engineering principles to new platforms. If you need someone who can own both hardware and firmware, communicate clearly, and deliver something you can actually ship, let’s discuss your project.

I specialize in desktop, embedded, web, and mobile software development, with a strong focus on Qt C++ systems, cross-platform applications, and hardware integration such as RFID, sensors, and custom devices. With 25+ years of experience, I deliver end-to-end software solutions across desktop, embedded, web, mobile, backend, and integration layers. I usually work on complete systems where reliability, maintainability, and long-term ownership are important. Core Expertise • Desktop Applications: Qt C++ / QML on Windows, Linux, macOS • Embedded & Hardware Integration: RFID, sensors, custom devices • Web Development: ASP.NET Core, APIs, databases, admin dashboards, backend systems • Mobile Development: Android/iOS apps, cross-platform mobile integrations • Backend & Integrations: REST APIs, databases, TCP/IP, third-party services • Cross-Platform Systems: Windows, Linux, Android, iOS • Project Ownership: Architecture, implementation, testing, deployment, delivery Technologies & Tools • Qt C++, Qt QML, PyQt • C++, C#, Python, ASP.NET Core, WPF, WCF • Web APIs, backend systems, admin panels, database-driven applications • Socket programming, TCP/IP, multithreading, Windows services • Windows API / SDK, MFC, COM, ActiveX • Databases: MySQL, MS SQL, MariaDB, SQLite, ODBC • Embedded: Atmel Studio, Microchip Studio Strengths • Building reliable, maintainable, long-lived systems • Strong desktop, embedded, web, and mobile system integration experience • Strong analytical and problem-solving skills • Clear communication and independent execution • Full ownership from architecture to final delivery Selected Projects • RFID-based document management system • Billing and invoicing platform • Fleet tracking and management system • Automotive spectrum analyzer system • POS and pharmacy management systems • Hospital and healthcare management systems • Hotel booking and resource management system • Automotive climate control software • Embedded alarm systems • Automated greenhouse ventilation and irrigation system • Web-based business management platforms • Mobile apps connected to backend systems and hardware devices

I build 25+ production-grade ESP32 firmware for IoT devices—focused on reliability, connectivity, and real-world deployment. If you need more than a prototype, I help take your system from 👉 fast MVP → stable, production-ready device, with cost-optimized hardware decisions along the way. ✅ Core Expertise (ESP32-focused) ▪️ESP32 firmware development (ESP-IDF, FreeRTOS) ▪️IoT connectivity (WiFi, BLE, MQTT, TCP/IP) ▪️Industrial communication (RS-485, Modbus, UART, CAN) ▪️Embedded systems (SPI, I2C, ADC, interrupts, peripherals) ▪️OTA updates, watchdogs, fault recovery ▪️Debugging crashes, memory leaks, and instability ✅ What I Deliver ▪️ Reliable ESP32 firmware that runs 24/7 (not just lab demos) ▪️ MQTT-connected IoT devices with secure cloud communication ▪️ RS-485 / Modbus systems for industrial environments ▪️ OTA update systems for remote device management ▪️ Low-power ESP32 designs for battery-powered products ▪️ Clean architecture for scaling from MVP to production ▪️ PCB design for practical consumer product to manufacturing ✅ Real-World Results ▪️Stabilized ESP32 devices with random crashes & WiFi drop issues ▪️Built Modbus RS-485 controllers for industrial communication ▪️Delivered ESP32 IoT devices with OTA + MQTT deployed in the field ▪️Reduced BOM cost with cost-optimized hardware + firmware design ▪️Converted prototypes into production-ready systems ✅ Tech Stack (Keyword-optimized) ▪️ESP32, ESP-IDF, FreeRTOS ▪️C, C++ ▪️MQTT, TCP/IP, WiFi, BLE ▪️UART, SPI, I2C, CAN, RS-485, Modbus ▪️Embedded debugging, performance optimization ▪️PCB Design, KiCad, EasyEDA ✅ How I Work ▪️Clear firmware architecture from day one ▪️Focus on stability, scalability, and maintainability ▪️Fast debugging on real hardware ▪️Practical decisions to reduce cost and complexity ✅ Best Fit Clients ▪️You have an ESP32 prototype that isn’t stable yet ▪️You need ESP32 firmware for a real product ▪️You’re building an IoT or industrial device (RS-485 / Modbus) ▪️You want to go from MVP → production without rewrites ▪️You care about cost-optimized, scalable hardware + firmware Message me with your ESP32 project details, and I’ll suggest the fastest path to a reliable production-ready system.

I am a passionate, punctual and results-driven hardware engineer focusing on electronic systems with an in-depth experience of all practical aspects of product design. I enjoy working on complex and diverse projects with various applications such as the industrial, automotive, IoT and medical sectors. Services: • Electronic/Hardware product design, including but not limited to system design, component selection, schematic drawing, PCB layout & routing, reviewing and troubleshooting. • Prototyping, assembly and validation of boards with up to hundreds of SMD components with own tools and equipment. • Advising on project feasibility, cost estimations. • Arranging turnkey manufacturing, helping with scaling a prototype into mass manufacturing, dealing with 3rd parties such as PCB plants, component suppliers, test laboratories, machining & injection molding shops. Skills: • Multi-layer PCB design with up to 10 layers • Mixed signal design with high speed interfaces such as Gigabit Ethernet, USB FS/HS, HDMI, DRAM, LVDS and others. • Analogue design with dedicated IC’s and discrete components with a focus toward audio electronics and sensor interfacing. • Digital design with discrete logic gates, microcontrollers of any variety and FPGA’s. • Power converters of various topologies including the custom magnetics. • RF design of LNA, oscillators, filters and power amplifiers. Integration of RF modules. • Thermal computations and simulations using FEA. • Mechanical design of enclosures, seals and of assemblies with moving parts. • Rendering of PCB’s and assembled products for presentation purposes • Embedded software with C and computer firmware/drivers. • GNU/Linux • System modeling, simulation optimization using SPICE, Matlab/Octave

I started working as a desktop software developer. I was part of a team that worked on a generic test tool for different type protocols ( G3 PLC, MBUS, MODBUS, TIC, SML, DLMS COSEM, HDLC) used in telecommunication and smart metering. I was responsible for implementing several protocols, some with the use of lexical and syntactical analizers, a C++/Python interface for executing Python scripts from the tool. As I got more experienced in C++, I started working on embedded systems for smart meters, and I worked on several smart meter projects, as Linky, Smest2, Wildcat, Iberdrola and Pegasus, over the years. My job was to implement the application part for the smart meters in C++, based on DLMS/COSEM (IEC 62056) standard and various specifications as the GBCS Smest2, IDIS 1/2.

Hi there, I am an experienced System/Software Automotive engineer with over 10 years in the automotive and embedded software industry. Throughout my career, I have led cross-functional teams of up to 12 engineers, managed complex testing processes, and delivered high-quality solutions for leading companies such as Hella, Veoneer, and Autoliv. My expertise covers software/system testing, embedded C, project management, and automation tools (Doors, PTC Integrity, JIRA, Vector Tools, CAPL scripting). I hold a Master’s degree in Computer Systems Networking & Telecommunications and I am ISTQB® Certified (CTFL). In addition to my technical background, I previously worked as a freelancer in multimedia design, admin support, and database management, which makes me adaptable and resourceful. I am fluent in English and Romanian, with basic French knowledge. ✔ If you’re looking for a reliable professional who can combine technical expertise, leadership, and problem-solving skills, I’d be happy to collaborate.