Projects — Junyi Jiao

Python · Transformer architecture

Implemented a decoder-only GPT model from scratch with attention and MoE architecture experimentation.

Python · Diffusion Transformer / DDPM

Built DiT implementation with end-to-end training, sampling, and checkpoint evaluation workflows.

Python · LLM post-training

Implemented post-training methods (GRPO/PPO/DPO + LoRA) on Gemma 2B with practical evaluation loops.

Python · Recommender systems · Agent evaluation

Built an agent harness for recommendation-system experimentation with repeatable eval runs, metrics tracking, and rapid iteration workflows.