An open-source, self-hosted personal productivity platform built on a microservices architecture. Loryth integrates task management, a knowledge base, grocery planning, journaling, and AI assistance into a unified system — designed for users who want full ownership of their personal data without relying on fragmented corporate services.

An open-source ride-sharing platform for Greece, named after the Straw Hat Pirates' first ship in One Piece. Inspired by the 2023 Tempi rail disaster, which highlighted the lack of reliable alternative transportation options in Greece, Going Merry was built to connect drivers and passengers for long-distance rides with a focus on privacy and trust.

A PyCharm plugin that fixes type resolution for SQLAlchemy 2.0's Mapped[T] annotations. PyCharm incorrectly flags valid SQLAlchemy code as type errors — this plugin hooks into the IDE's type provider system to correctly resolve mapped attributes on both instances and classes, supporting features like @hybrid_property and @declared_attr. A weekend hack that picked up 20 stars on GitHub.

An alternative executor for TensorFlow that replaces the default breadth-first (eager) graph execution with a demand-driven, depth-first approach. By propagating demand backward from output nodes, intermediate results are consumed sooner and freed earlier — dramatically reducing peak memory usage during operations like backpropagation, where standard execution forces early activations to persist until the very end of the backward pass. Developed as an undergraduate research project at the University of Athens, with a working prototype showing promising memory reduction results.

Represented the University of Athens in the ACM SIGMOD 2020 Programming Contest, an entity resolution challenge requiring participants to match duplicate product specifications across 24 e-commerce websites. The system needed to identify which of ~30,000 camera product listings referred to the same real-world product, evaluated by F-measure on a secret held-out dataset.