Aayush Garg

LLM fundamentals, fine-tuning experiments, and building reliable AI systems.

I am an applied machine learning engineer focused on building resilient AI-driven products and systems. At Jiffy, I specialize in building intelligent image enhancement pipelines and agentic systems, developing custom ML models, and deploying ML/LLM models at scale for diverse verticals.

💼 Current Work

I work at the intersection of computer vision and LLMs, building practical AI systems that deliver real business value. My background is in computational geophysics which keeps me grounded in first principles and pragmatic experimentation.

If you’re interested in my work or want to collaborate, feel free to reach out via email or connect on LinkedIn or Twitter.

📮 Blog

I write about LLM fundamentals, fine-tuning experiments, and building reliable AI systems. Below are my recent posts.

Date	Title
1/13/26	A Brief Introduction to Claude Agent Skills
1/6/26	Key Insights from DeepSeekMath paper
1/1/26	Understanding GRPO: PPO without the Critic
12/30/25	Deriving the DPO Loss from First Principles
12/25/25	Deriving the PPO Loss from First Principles
12/3/25	What I Learned Building SFT from the Ground Up
9/10/25	A Guide to Building Custom Nodes in ComfyUI
9/8/25	Building GPT from Scratch: Following Karpathy’s Tutorial
9/2/25	Key Takeaways from Lecture 1: LLM Evaluation Lifecycle
7/15/24	Part III: Fine-tuning Llama-3-8B for Structured Functional Representation Extraction

📬 Reach Out

The best way to follow my work is on GitHub, Twitter, or LinkedIn.

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