Mark S.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 Nov 5, 2026.

Algorithm developer, research scientist, and technical leader with experience in image and signal processing, data analysis, optimization, pattern recognition, and machine learning for startup companies in a variety of applications and industries. Most development performed in Python with Numpy, Scipy, OpenCV, and sklearn libraries. Generally work with early stage prototype algorithm development (getting it working, not optimizing for execution speed).