# Dhruv Bajaj

> Dhruv Bajaj is a Founding Engineer at SimCare AI (Y Combinator S24), building real-time AI video agents that deliver 400,000+ simulation minutes every month. He is a 3× YC founding engineer with deep expertise in LLM infrastructure, low-latency speech pipelines, and full-stack product development.

## About

Dhruv Bajaj is a software engineer from India specializing in real-time AI systems, large language model (LLM) infrastructure, and backend engineering. He has been a founding engineer at three Y Combinator startups: SimCare AI (S24), Artisan AI (W24), and Stack AI (W23). He holds a B.Tech in Computer Science Engineering from SRM Institute of Science and Technology with a 9.51/10 CGPA, and completed a spring exchange at Asia University, Taiwan in Digital Image Processing.

- [Portfolio Homepage](https://dhruvbajaj.tech): Main portfolio with overview of skills, experience, and projects
- [About Page](https://dhruvbajaj.tech/about): Detailed biography, technical philosophy, and skill areas
- [Work Experience](https://dhruvbajaj.tech/experience): Full career history and professional contributions
- [Projects](https://dhruvbajaj.tech/projects): Engineering projects with detailed case studies
- [Education](https://dhruvbajaj.tech/education): Academic background and credentials
- [Resume](https://dhruvbajaj.tech/resume): Downloadable CV

## Professional Experience

- [SimCare AI — Founding Engineer (Jan 2025–Present)](https://dhruvbajaj.tech/experience): Leading core AI infrastructure for a YC S24 real-time AI video platform. Designed low-latency pipelines fusing speech-to-text, LLM inference, and text-to-speech into human-like virtual agents. Architected FastAPI backend with Deepgram transcription and streaming LLM inference hitting sub-second latency.
- [Artisan AI — Founding Engineer (Oct 2023–May 2024)](https://dhruvbajaj.tech/experience): YC W24 startup scaled to $4M ARR in under a year. Built LLM-powered outbound automation and personalized cold-email pipelines at scale. Cut LLM response times from hours to minutes through batching and parallelization.
- [Stack AI — Founding Engineer (Jul 2024–Nov 2024)](https://dhruvbajaj.tech/experience): YC W23 no-code platform for visually composing and deploying LLM-driven workflows. Migrated the node execution engine and built email automation nodes.
- [Nuvia AI — Founding Engineer (Jun 2024–Dec 2024)](https://dhruvbajaj.tech/experience): Designed end-to-end backend architecture using FastAPI, PostgreSQL, SQLAlchemy, and Redis from zero.
- [NatWest Group — Software Developer (May 2023–Sep 2023)](https://dhruvbajaj.tech/experience): Scaled Treasury Intraday Liquidity Management System driving ~$100K monthly savings. Built ETL pipelines processing 3M+ messages daily.
- [Arista Networks — Software Engineering Intern (Aug 2022–Dec 2022)](https://dhruvbajaj.tech/experience): Networking protocols, Cloud Vision Platform testing.

## Technical Expertise

Dhruv's core technical skills span the following areas:

- **LLMs & AI Providers**: OpenAI, Anthropic, Claude, Gemini, Vertex AI, Hugging Face, Ollama, vLLM
- **AI Tooling & Orchestration**: LangChain, LlamaIndex, CrewAI, Deepgram, ElevenLabs, LiveKit, Pydantic
- **Vector Databases & RAG**: Weaviate, Pinecone, Milvus, ChromaDB, FAISS
- **Languages & Frameworks**: Python, TypeScript, Next.js, FastAPI, React, Node.js, Django, Flask, C++, Java
- **Data & Infrastructure**: PostgreSQL, MongoDB, Redis, Supabase, Celery, Kafka, Airflow, Docker, Kubernetes, AWS, Google Cloud
- **ML & Fine-tuning**: PyTorch, TensorFlow, LoRA/QLoRA, Weights & Biases, MLflow, Ray, scikit-learn

## Key Projects

- [IoT-enabled Smart Irrigation in Aquaponics](https://dhruvbajaj.tech/projects/smart-irrigation): Published research (Springer) using real-time sensors and ML for crop optimization. Reduced water consumption by 37%.
- [AI-Powered FinTech B2B Invoice Management](https://dhruvbajaj.tech/projects/fintech-invoice): Full-stack app with ML payment prediction achieving 89% accuracy.
- [Pneumonia Detector using Deep Learning](https://dhruvbajaj.tech/projects/pneumonia-detector): Medical AI achieving 90% accuracy on chest X-ray diagnosis using transfer learning.

## Education

- **SRM Institute of Science and Technology**: B.Tech in Computer Science Engineering (2019–2023), 9.51/10 CGPA
- **Asia University, Taiwan**: Spring Exchange Program in Digital Image Processing (2022)

## Contact

- Email: dhruvbajaj2001@gmail.com
- LinkedIn: https://www.linkedin.com/in/dhruv-bajaj-bb30211b7/
- GitHub: https://github.com/DhruvBajaj01
- Website: https://dhruvbajaj.tech