Joseph D.Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Oct 22, 2026.

My career started with freelance web development in 2005, followed by mixed-signal semiconductor design at my startup. Since 2020, I have focused on cross-platform desktop applications and software that communicates with hardware. I work with C, C++, Python, Qt 5/6, wxWidgets, and CMake. My experience includes multithreading, serial and USB communication, raw data processing, WinUSB integration, and PLC communication through the ABNet API. My hardware experience includes PCB design, embedded firmware, and analog and digital electronics. I combine this background with software development to connect electronic hardware with desktop applications and data-processing tools. I also use Python for automation, data analysis, and AI/ML development, including data preprocessing, feature engineering, predictive modeling, and model evaluation. In a previous automotive role, I extended C++, ROS, and ADTF-based software for ADAS analysis, working with AUTOSAR ARXML, SOME/IP, CAN/CAN FD, DBC files, and LiDAR point cloud data. My semiconductor background includes mixed-signal IC design in 0.6–0.25 µm CMOS technologies and Verilog development. I have worked on DDR2, SPI, I²C, Ethernet MAC, and USB controllers, along with a custom 8-bit processor core. I also have experience with FreeRTOS and custom device emulation in QEMU. Core skills: - Programming: C, C++, Python, SQL, JavaScript, PHP - Desktop: Qt 5/6, wxWidgets, Win32, CMake, multithreading - Embedded & Firmware: FreeRTOS, hardware integration, serial and USB communication - PCB & Electronics: PCB design, analog and digital circuits, mixed-signal CMOS design - AI/ML: Data preprocessing, feature engineering, predictive modeling, model evaluation - Digital Hardware: Verilog, peripheral controllers, processor cores, QEMU - Automotive: ROS 1/2, ADTF, AUTOSAR ARXML, SOME/IP, CAN/CAN FD, LiDAR data - Web: PHP, JavaScript, HTML, CSS, databases, API integration Selected projects include a high-speed four-sensor data plotter, a medical document processing platform, and an SMS-based polling system. I am currently developing a semiconductor EDA tool in C++ and wxWidgets as a personal project.