Engineering leader and hands-on builder. 10+ years scaling consumer products to 90M+ users; now building AI from the ground up - small language models, RAG systems, and agents.

🔭 Currently building

• SLM from scratch - a small language model for English + Indic languages. Decoder-only transformer (RoPE, RMSNorm, SwiGLU, GQA) in PyTorch.
• Virtual Persona - a deployed RAG "AI twin" (LangChain + ChromaDB + FastAPI + Next.js). Live at themayankgautam.com.
• Trolley - cross-platform shopping app (Kotlin Multiplatform + Django REST + server-side AI), entering beta.

🛠 Work with: Python · FastAPI · PyTorch · LangChain · RAG · PostgreSQL · Redis · Docker · Kotlin/Android · Node.js

💼 Previously: Senior Engineering Manager @ Rooter (90M+ downloads) · Tech Lead @ Digital Green · IIIT-Delhi CSE

📫 [email protected] · Website · LinkedIn