Raja Kumar

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 2026πŸŽ‰ PhD milestonePassed my qualifying exam and officially became a PhD candidate! πŸŽ‰
  • Oct 2026πŸš€ PreprintReleased the preprint of SPLIT-RL, my internship work at Amazon AGI! πŸš€ A staged reinforcement learning approach that trains visual perception and language reasoning in turn to improve VLM reasoning. Read the paper.
  • Aug 2026β˜€οΈ InternshipWrapped up my summer internship at Amazon AGI, working on multimodal reasoning in VLMs!
  • May 2026πŸ”¬ New roleJoined Amazon AGI as an Applied Scientist Intern, working on post-training vision-language models! πŸ”¬
  • Apr 2026🌎 ConferencePresented DiVE-k at ICLR 2026 in Rio de Janeiro! πŸ‡§πŸ‡·
  • Jan 2026πŸŽ‰ Paper acceptedOur work DiVE-k is accepted at ICLR 2026 πŸ‡§πŸ‡·! Code available here
  • Nov 2025πŸš€ PreprintCheckout DiVE-k a visual reasoning framework that elicits differential reasoning
  • Aug 2025πŸ’‘ AI summitAttended Agentic AI Summit at UC Berkeley. Checkout my takeaways blog!
  • Aug 2024πŸŽ“ PhD journeyJoined USC as a CS PhD Student!
  • Aug 2024πŸŽ‰ Paper acceptedFew-shot 3D Gaussian splatting accepted at S3DSGR @ ECCV'24!
  • Apr 2024πŸ”¬ New roleJoined Flawless AI as Applied Science Intern (3D vision)
  • Mar 2024πŸŽ“ GraduationCompleted my MS in CS at UC Santa Cruz
  • Oct 2023🌎 ConferenceAttended ICCV 2023 in paris to present our work
  • Aug 2023πŸŽ‰ Paper acceptedPaper on 3D face reconstruction accepted at ICCV Workshops 2023
  • Sep 2022πŸŽ“ New chapterJoined UCSC as CSE Master's student (Fall 2022)
  • Mar 2022πŸ’Ό New roleJoined Silverlabs recommendation team as an ML Engineer
  • Apr 2021πŸŽ‰ Paper acceptedPaper on quantization accepted by IJCNN 2021
  • Jun 2019πŸ’Ό New roleJoined Samsung Research on-device-AI team as an ML Engineer

Services

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).