About
I am a Computer Science PhD student at the University of Southern California (USC), advised by Prof. Ram Nevatia. My research focuses on Computer Vision and Vision-Language Models (VLMs), with a particular emphasis on improving their visual perception and reasoning capabilities through post-training techniques, including reinforcement learning.
Recently, I was an Applied Scientist Intern at Amazon AGI, where I worked on improving multimodal reasoning in VLMs. Prior to joining USC, I earned my M.S. in Computer Science from the University of California, Santa Cruz, where I was advised by Prof. James Davis. I also worked at Samsung Research, focusing on data-free quantization of deep learning models. I received my B.Tech. in Electrical Engineering from IIT Kharagpur.
I am actively seeking research internship opportunities for Summer 2027, particularly in multimodal learning, vision-language models, and post-training. Feel free to reach out at kumarraj@usc.edu if you see a potential fit!
News / Updates
- Oct 2026π PhD milestonePassed my qualifying exam and officially became a PhD candidate! π
- Oct 2026π PreprintReleased the preprint of SPLIT-RL, my internship work at Amazon AGI! π A staged reinforcement learning approach that trains visual perception and language reasoning in turn to improve VLM reasoning. Read the paper.
- Aug 2026βοΈ InternshipWrapped up my summer internship at Amazon AGI, working on multimodal reasoning in VLMs!
- May 2026π¬ New roleJoined Amazon AGI as an Applied Scientist Intern, working on post-training vision-language models! π¬
- Apr 2026π ConferencePresented DiVE-k at ICLR 2026 in Rio de Janeiro! π§π·
- Jan 2026π Paper acceptedOur work DiVE-k is accepted at ICLR 2026 π§π·! Code available here
- Nov 2025π PreprintCheckout DiVE-k a visual reasoning framework that elicits differential reasoning
- Aug 2025π‘ AI summitAttended Agentic AI Summit at UC Berkeley. Checkout my takeaways blog!
- Aug 2024π PhD journeyJoined USC as a CS PhD Student!
- Aug 2024π Paper acceptedFew-shot 3D Gaussian splatting accepted at S3DSGR @ ECCV'24!
- Apr 2024π¬ New roleJoined Flawless AI as Applied Science Intern (3D vision)
- Mar 2024π GraduationCompleted my MS in CS at UC Santa Cruz
- Oct 2023π ConferenceAttended ICCV 2023 in paris to present our work
- Aug 2023π Paper acceptedPaper on 3D face reconstruction accepted at ICCV Workshops 2023
- Sep 2022π New chapterJoined UCSC as CSE Master's student (Fall 2022)
- Mar 2022πΌ New roleJoined Silverlabs recommendation team as an ML Engineer
- Apr 2021π Paper acceptedPaper on quantization accepted by IJCNN 2021
- Jun 2019πΌ New roleJoined Samsung Research on-device-AI team as an ML Engineer
Selected Publications
Full listServices
Reviewer
- ICLR 2026, NeurIPS 2026, ICLR 2027
Teaching Assistant
- Advanced Computer Vision, Prof. Ram Nevatia, USC, Fall 2025
- Introduction to Artificial Intelligence, Prof. Mohammad Reza Rajati, USC, Fall 2024
- Computer Systems and Assembly Programming, Prof. Marcelo Siero, UCSC, Winter/Fall 2023, Winter 2024
- Introduction to Analysis of Algorithms, Prof. Suresh Lodha, UCSC, Summer 2023
- Computer Architecture, Prof. Scott Beamer, UCSC, Spring 2023
Contact
Email works best (kumarraj at usc dot edu).