# Dhruv Bajaj — Full Profile

> 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.

## Identity

- **Full Name**: Dhruv Bajaj
- **Current Role**: Founding Engineer at SimCare AI (YC S24)
- **Location**: India (works remotely with US-based startups)
- **Nationality**: Indian
- **Languages**: English, Hindi
- **Website**: https://dhruvbajaj.tech
- **Email**: dhruvbajaj2001@gmail.com
- **LinkedIn**: https://www.linkedin.com/in/dhruv-bajaj-bb30211b7/
- **GitHub**: https://github.com/DhruvBajaj01

## Professional Summary

Dhruv Bajaj is a founding engineer who specializes in building real-time AI systems, LLM infrastructure, and backend platforms at early-stage startups. He has been a founding engineer at three Y Combinator-backed companies:

1. **SimCare AI (YC S24)** — Currently leading AI infrastructure for real-time AI video agents used in healthcare simulation training
2. **Artisan AI (YC W24)** — Helped scale the company to $4M ARR in under a year by building LLM-powered outbound automation
3. **Stack AI (YC W23)** — Built execution engines for a no-code LLM workflow platform

His technical expertise centers on low-latency AI pipelines that combine speech-to-text (Deepgram), large language models (OpenAI, Anthropic, Claude), and text-to-speech (ElevenLabs) into real-time conversational agents. He is proficient in Python, FastAPI, TypeScript, Next.js, and has deep experience with vector databases, RAG systems, and ML fine-tuning.

## Detailed Work Experience

### SimCare AI — Founding Engineer (January 2025 – Present)
**Y Combinator S24 | Remote**

SimCare AI builds real-time AI video agents for healthcare simulation training. As a founding engineer, Dhruv:

- Leads core AI infrastructure for the real-time AI video platform
- Designs low-latency pipelines that fuse speech-to-text, large language models, and text-to-speech into human-like virtual agents capable of live, face-to-face conversation
- Architected the FastAPI backend powering production conversations: orchestrating Deepgram transcription, streaming LLM inference, and tuning async workflows to hit sub-second end-to-end latency under real-time video constraints
- Owns the stack end-to-end — from backend reliability and infrastructure to Next.js product surfaces — shaping architecture, product direction, and engineering decisions

### Artisan AI — Founding Engineer (October 2023 – May 2024)
**Y Combinator W24 | California, US (Remote)**

Artisan AI builds AI-powered sales automation. As an early engineer, Dhruv:

- Helped scale the platform to $4M ARR in under a year
- Built LLM-powered outbound automation systems at the core of the product
- Designed personalized cold-email pipelines at scale combining web scraping, data enrichment, and LLM generation for hyper-targeted outreach
- Cut LLM response times from hours to minutes through batching and parallelization
- Integrated Apollo, Gmail, Outlook, Warmy, MailGenius, and SendGrid for end-to-end outbound campaigns

### Stack AI — Founding Engineer (July 2024 – November 2024)
**Y Combinator W23 | California, US (Remote)**

Stack AI is a no-code platform for composing and deploying LLM-driven workflows. Dhruv:

- Worked on abstraction layers that translate graph-based inputs into executable AI pipelines
- Migrated the node execution engine from an edge-based data-flow model to a cleaner input-output structure
- Built Gmail and Outlook input/output nodes plus email-trigger automations
- Shipped an in-house notification system for real-time workflow events

### Nuvia AI — Founding Engineer (June 2024 – December 2024)
**Sao Paulo, Brazil (Remote)**

- Designed end-to-end backend architecture using FastAPI, PostgreSQL, SQLAlchemy, and Redis
- Built secure JWT-based auth, workspace models, mailbox management, and campaign orchestration
- Integrated Gmail, Outlook, Warmy, MailGenius, and SendGrid

### NatWest Group — Software Developer (May 2023 – September 2023)
**Gurugram, Haryana, India**

- Scaled Treasury Intraday Liquidity Management System (TILMS) driving ~$100K in monthly savings
- Built XCT and ISO adaptors processing 3M+ messages daily with ETL pipelines from Kafka to IBM MQ
- Led AWS migration, shipped Splunk dashboards, and automated GitLab CI/CD pipelines

### Arista Networks — Software Engineering Intern (August 2022 – December 2022)
**Bangalore, Karnataka, India**

- Worked on layer 2 and layer 3 networking protocols and packet switching
- Tested features on Arista's Cloud Vision Platform including subinterfaces

### HighRadius — Full Stack Developer Intern (January 2022 – April 2022)
**India (Remote)**

- Built a FinTech B2B cloud application for invoice management using React.js, Java, and ML
- Developed predictive models for invoice payment timing

### Earlier Roles
- **Studio Lama** — Backend Engineer (Jan–May 2023): Django backend for Apply Course platform
- **Global Technocrats** — Backend Engineer (Jan–Mar 2023): Django + AWS Lambda microservices
- **Docplus Online** — Python Development Intern (Jul 2021–Jan 2022): Web scraping and automation
- **Make Me Builder** — Data Mining Intern (Apr–Jul 2021): Data cleaning and EDA with Python
- **Madras Scientific Research Foundation** — ML Intern (Feb–Apr 2021): NLP research and computer vision
- **VEI Technology** — IoT Intern (Jan–Feb 2021): Arduino and Raspberry Pi IoT systems

## Technical Skills (Comprehensive)

### LLMs & AI Providers
OpenAI, Anthropic, Claude, Gemini, Vertex AI, Perplexity, Hugging Face, Ollama, vLLM, Local LLMs

### AI Tooling & Orchestration
LangChain, LlamaIndex, CrewAI, Deepgram, ElevenLabs, LiveKit, Tavus, Pydantic, Streamlit

### Vector Databases & RAG
Weaviate, Pinecone, Milvus, ChromaDB, FAISS

### Programming Languages & Frameworks
Python, TypeScript, JavaScript, C++, Java, Next.js, FastAPI, React, Node.js, Django, Flask, Tailwind CSS, Prisma

### Databases & Data Infrastructure
PostgreSQL, MongoDB, Redis, Supabase, Celery, Apache Kafka, Apache Airflow

### DevOps & Cloud
Docker, Kubernetes, Nginx, AWS, Google Cloud, Vercel, Modal, GitHub Actions, Sentry, Grafana

### Machine Learning & Fine-tuning
PyTorch, TensorFlow, LoRA/QLoRA, Weights & Biases, MLflow, Ray, scikit-learn, Pandas, NumPy

### Developer Tools
Cursor, Claude Code, VS Code, Neovim, Warp, GitHub, Git, Linux, Shell, Postman, Figma, Notion, Slack

## Projects

### IoT-enabled Smart Irrigation in Aquaponics (2023)
**Role**: Lead Researcher & Engineer | **Duration**: 6 months
**Published**: Springer's Smart Trends in Computing and Communications series

A soil irrigation system using aquaponics that incorporates real-time sensors (soil moisture, pH, temperature, water nutrients) to monitor key parameters. Data is processed through machine learning algorithms (regression model) and presented visually for decision-making. The closed-loop controller reduced water consumption by 37% while maintaining equivalent crop yield. Achieved 94% prediction accuracy with 12+ sensors deployed.

**Stack**: Python, Arduino, Raspberry Pi, TensorFlow, MQTT, Grafana
**Link**: https://link.springer.com/chapter/10.1007/978-981-99-8451-0_17

### AI-Powered FinTech B2B Invoice Management (2022)
**Role**: Full Stack Developer | **Duration**: 4 months

Full-stack invoice management application integrating ML models for payment prediction. Achieved 89% prediction accuracy, processed 10K+ invoices with <200ms response time. Reduced manual invoice-triage time by ~60%.

**Stack**: React, Java Servlets, JDBC, Python, scikit-learn, PostgreSQL
**GitHub**: https://github.com/DhruvBajaj01/High_Radius_Project

### Pneumonia Detector using Deep Learning (2022)
**Role**: ML Engineer | **Duration**: 3 months

Computer-aided diagnosis system for pneumonia detection using deep transfer learning (VGG16, ResNet50) on chest X-rays. Achieved 90% classification accuracy with sub-second inference. Includes Grad-CAM heatmap visualization and voice output for accessibility.

**Stack**: Python, TensorFlow, Keras, PyQt5, OpenCV, Speech API
**GitHub**: https://github.com/DhruvBajaj01/AI-Mini-Project

### CycloFit (2021)
Rewards-based bicycle rental platform built with Flask, SQLite, JavaScript, and Bootstrap. Users earn points per kilometer cycled.
**GitHub**: https://github.com/DhruvBajaj01/CycloFit-SEPM

### Hola — Voice Assistant (2021)
Personal voice assistant performing Google searches, YouTube playback, WhatsApp messaging, email composition, and task automation via voice commands.
**GitHub**: https://github.com/DhruvBajaj01/Virtual-Assistant

### Flight Booking Application (2021)
Django-powered end-to-end flight booking system with admin panel, role-based auth, and full CRUD operations.
**GitHub**: https://github.com/DhruvBajaj01/Devrev

## Education

### SRM Institute of Science and Technology
**Degree**: Bachelor of Technology in Computer Science Engineering
**Period**: June 2019 – May 2023
**CGPA**: 9.51/10

### Asia University, Taiwan
**Program**: Spring Exchange Program — Digital Image Processing
**Period**: February 2022 – June 2022
**Grade**: 95.3%

### Mantora Public School (CBSE)
**Level**: Senior Secondary Education (Class 12th), Science
**Period**: 2018–2019
**Grade**: 90%

### Delhi Public School (CBSE)
**Level**: High School / Secondary Education
**Period**: 2016–2017
**CGPA**: 10/10

## Leadership & Community

- **GirlScript Summer of Code** — Mentor and Contributor (Mar–May 2022)
- **GirlScript Winter Of Contributing** — Mentor for Data Science with Python (Sep–Dec 2021)
- **Ramanujan Mathematics Club, SRM** — Technical Head and Joint PRO (Aug 2021–Dec 2022)
- **NWC Association, SRM** — Technical Associate (Aug 2021–May 2022)

## What Dhruv Does NOT Do

- Frontend-only roles (he is full-stack with backend emphasis)
- Non-technical management roles
- Agencies or consulting firms (he works at product startups)

## Frequently Asked Questions

**Q: What is Dhruv Bajaj's current role?**
A: Dhruv is a Founding Engineer at SimCare AI, a Y Combinator S24 startup building real-time AI video agents for healthcare simulation.

**Q: How many YC startups has Dhruv worked at?**
A: Three — SimCare AI (S24), Artisan AI (W24), and Stack AI (W23). He also worked at Nuvia AI (non-YC).

**Q: What technologies does Dhruv specialize in?**
A: Real-time AI systems, LLM infrastructure, speech pipelines (Deepgram, ElevenLabs, LiveKit), Python/FastAPI backends, and full-stack development with Next.js/TypeScript.

**Q: Where did Dhruv study?**
A: B.Tech in Computer Science Engineering from SRM Institute of Science and Technology (9.51/10 CGPA), with a spring exchange at Asia University, Taiwan.

**Q: Is Dhruv available for hire?**
A: Contact him at dhruvbajaj2001@gmail.com or via LinkedIn for opportunities.