Things I'vebuilt.

Java · OOP · PostgreSQL

31 — JUnit tests

Full layered architecture with Repository pattern, Singleton DB connection, and soft-delete — built for real disaster response.

Python · Algorithms

6 — data structures from scratch

AVL tree, min-heap, FIFO queue, graph — all hand-written. Dijkstra's runs live on a weighted campus graph.

Python · Machine Learning

91% — digit recognition

A neural network with full backpropagation, written in NumPy only — no TensorFlow, no PyTorch. Every model built up from the math.

C / C++ · Embedded

200 Hz — sensor logging

FreeRTOS firmware logging IMU, baro, mag, and GPS to 1 Gb QSPI flash. State survives power loss. Flies on a real rocket.