THEJITHAWIJAYANAYAKE

Owned the full-stack Seller Module and buyer-seller messaging system in a five-member team, developing seller dashboards and workflows to create, schedule, monitor, and manage live, scheduled, and completed tea auctions. Architected and implemented the direct messaging system connecting tea sellers and buyers for trade negotiations and post-auction order fulfillment. Built responsive multi-step auction forms with validation and image previews, integrated frontend with backend REST APIs and MSSQL persistence, and supported real-time auction updates.

Designed and assembled the motion mechanism using NEMA 17 stepper motors, GT2 timing belts, TMC2208 drivers, limit switches, and GRBL firmware on an Arduino Uno. Designed and fabricated a custom controller PCB for the table's automated drawer, which opens and closes smoothly using a single push button. Implemented an ESP32 bridge that streamed G-code line by line from TFT touch and web interfaces using acknowledgement-based flow control, integrating embedded control, Wi-Fi communication, motion calibration, and physical system debugging.