About me
MS CS at NYU Courant.
AI systems builder.
I'm pursuing my M.S. in Computer Science at NYU Courant, with a focus on machine learning and AI systems. Previously, I was a software engineer at Qualcomm, where I built LLM systems and multi-agent GenAI tools.
From my work on Code Buddy at Qualcomm
- 12,000+
- Engineers served
- 2M+
- Automated reviews
- 4,000+
- Repositories
More about my work
One of my key projects at Qualcomm was Code Buddy, a multi-agent code-review platform I architected that's now used by 12,000+ engineers across 4,000+ repositories. It runs detect-then-fix agents under a tool-calling orchestrator and has delivered over 2 million automated reviews, saving the company something like 114,000 engineer-hours a month. I also built an autonomous agent that triages modem hotline escalations end-to-end (13 tools, 4-model consensus review, shelves a 3GPP-cited fix), and another that reads live C/C++ modem source to drive 4G/5G NAS protocol tests.
Outside of work I've been obsessed with on-device AI. I built CabinAI, a 7-agent driver monitoring system that runs locally in the car; MyAI, an Android assistant that runs a quantized LLM entirely on the phone with no internet permission; and HealthSense, a tiny foundation model that fuses five biosignals on a wearable to catch cardiac and stress conditions in real time. All three made it to SparQ Qualcomm TechFest 2026, and CabinAI won the Jury Award, competing solo against 166 teams.
Before Qualcomm I interned at AMD and Standard Chartered, founded the AR/VR Lab at BITS Pilani, and spent a semester doing mixed reality research at TU Braunschweig on a DAAD Scholarship.
Recommendations
From the people I’ve built with.
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Kiran Janga
Director, Engineering · Qualcomm
“Varun is an exceptionally talented engineer with a clear vision for the future of AI, and I wish him nothing but the best in his future endeavors.”
Read full recommendation
View LinkedIn profile ↗I had the pleasure of working with Varun Sahni on developing GenAI tooling for software engineering. Varun demonstrated remarkable foresight in identifying how design patterns can be used to write scalable app. We took a GenAI-powered code review assistant from a pilot phase to mass adoption, purposefully designing it with a future-proof architecture that ensured scalability as usage grew.
Beyond his core contributions, Varun’s relentless drive for innovation was evident in his development of an AI-powered presentation builder and a sophisticated on-device assistant prototype. His ability to turn ambitious concepts into functional, high-impact products, often under the pressure of hackathons and competitive demo selections, truly sets him apart. Varun is an exceptionally talented engineer with a clear vision for the future of AI, and I wish him nothing but the best in his future endeavors.
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Subhash Kunnoth
Senior Manager · AMD
“Varun consistently showcased excellent programming skills and a good knack for problem-solving.”
Read full recommendation
View LinkedIn profile ↗During Varun's internship at AMD, I had the pleasure of working with him closely. Throughout his 6 months time here, Varun consistently showcased excellent programming skills and a good knack for problem-solving. He automated intricate workflows, bringing in efficiency improvements in processes. He employed multithreaded scripting and effective load balancing to solve some the challenges. Varun's innovative solutions underscored his robust technical proficiency and capacity to deliver superior outcomes. Varun is a dedicated and skilled professional, and I confidently endorse him for roles demanding advanced programming expertise and creative problem-solving abilities.
My Interests
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Artificial Intelligence & LLM Systems
At Qualcomm I built Code Buddy, a multi-agent LLM code-review platform serving 1,400+ engineers, and an agentic tool that drives 4G/5G NAS protocol tests by reasoning over live modem source code. On the side I built three on-device AI systems: CabinAI (7-agent driver-monitoring VLA for cars), MyAI (privacy-first Android assistant running a quantized LLM on the Hexagon NPU with zero internet permission), and HealthSense (5.4M-param multimodal foundation model detecting cardiac and stress conditions from wearable biosignals).
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Augmented Reality
Recipient of the prestigious DAAD Scholarship, developed a Mixed Reality application on HoloLens to visualize complex LCA data. As the founding President of Kalipatnapu AR/VR Lab, BITS Pilani, led a team of 40 students on various AR/VR projects and hosted a VR Experience Zone during Oasis, generating profits exceeding ₹40,000.
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App Development
Designed and developed several mobile applications using Flutter during internships, including: FloraFast: A plant delivery app, Adoption App: For connecting users with adoptable dogs, Live Train Tracker: For real-time train status updates, iWorksLab: A food delivery app, Notes and Weather App
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Cellular Networks
At Qualcomm, contributed to the NAS (Non-Access Stratum) layer for NTN (Non-Terrestrial Network) and LTE (4G) architecture by implementing critical features and resolving high-priority customer issues.
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DevOps
Received the CCIB SCPAY Award for leading the migration of continuous integration systems from Jenkins to Azure DevOps. This transition improved scalability, reliability, and reduced deployment times.
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Game Development
Created a water conservation game for NCERT and developed other games like UNO and 3D survival games as part of academic projects.
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