رونق کمار
New York City
Violinist · Product Manager
From a Carnegie Hall debut at fourteen to the Kennedy Center and Kulturpalast Dresden, a career rooted in freelancing in chamber ensembles and orchestras, with a passion for building concert series that adapt classical music for newer generations.
Applied Mathematics at Columbia. Machine learning research in radiation oncology. Now building new features for HubSpot's customer success platform.
I'm a violinist and product manager based in New York City, equal parts artist and builder. This site is a snapshot of where I am right now, the music I'm making, the work I'm doing, and the curiosity that connects them. Feel free to reach out, and check back as it grows!
Biography
Raunak Kumar is a violinist from Johns Creek, Georgia, based in New York City. A student of Siwoo Kim, he balanced his musical pursuits with studies in Applied Mathematics at Columbia University. Previously, he trained at the New England Conservatory Preparatory School under Soovin Kim and Detroit Symphony Concertmaster Robyn Bollinger while studying at the Walnut Hill School for the Arts.
Raunak has performed on prestigious stages worldwide, including the Kennedy Center, Alice Tully Hall, and Kulturpalast Dresden. He made his orchestral debut with the Georgia Youth Symphony and his Carnegie Hall debut at fourteen. A first-prize winner of the GMTA String Competition and a National YoungArts Foundation awardee, he has also led chamber ensembles to victory in competitions such as the Franklin Pond Chamber Music Competition and has been featured twice on NPR and WQXR. He recently performed chamber concerts in Portugal at the Portuscal Music Festival and is excited to be a part of the St. Lawrence Chamber Music Seminar this summer at Stanford University.
As an orchestral musician, he has served as Concertmaster for Camerata Notturna and Westside Chamber Players, in addition to subbing with Princeton Symphony, The Orchestra San Antonio, and New York Classical Players. He has participated in festivals including Aspen, Bowdoin, and the Moritzburg Festival Academy. This past summer, he was a teaching artist at the Classical Music Institute in San Antonio before performing in Austria with Alpen KammerMusik.
During the pandemic, Raunak founded Give Bach, a virtual concert series that raised over $6,000 for COVID-19 relief through performances of solo Bach, uniting musicians from pre-college to professional levels, including Augustin Hadelich and Alexi Kenney. The initiative was recognized by the Atlanta Symphony and New England Conservatory.
To conclude his mathematical studies and scratch the itch for his love of commercial aviation, he and his colleagues delivered a capstone project on the Kutta-Joukowski theorem, focusing on optimal airfoil design. Raunak also worked with radiation oncology at the Columbia University Medical Center to determine patient survival probability with a causal inference machine learning model.
As he embarks on a new chapter as a Product Manager at HubSpot, Raunak remains dedicated to his musical career, freelancing as a chamber musician and performing with Camerata Notturna. Offstage, he enjoys exploring Urdu calligraphy, rock climbing at bouldering gyms, exploring new mathematical theorems, and savoring the culinary delights of New York City.
Music
Kennedy Center
Washington, D.C.
Alice Tully Hall
Lincoln Center, New York
Carnegie Hall Debut
New York, NY
Kulturpalast Dresden
Dresden, Germany
GMTA First Prize
String Competition
YoungArts Awardee
National Foundation
Give Bach aimed to support COVID-19 relief and racial equity in the United States. Using virtual performances from students and leaders in the classical music industry, the series united musicians to fight for a better world. Half of the proceeds went to The Innocence Project; the other half to Oxfam America's Coronavirus Emergency Fund.
The series raised over $6,000 and featured Augustin Hadelich, Alexi Kenney, Milena Pajaro-van de Stadt, and many others. Recognized by the Atlanta Symphony and New England Conservatory.
Work & Research
Current · Sep 2025 - Present
Associate Product Manager · Customer Success
Building health scores for customer success managers on HubSpot's Customer Success platform. Previously interned on the Product Security team as one of five APMs in the third cohort (Summer 2024).
Fellowship · Sep 2025 - Present
Hsing Fellow
Selected for the Hsing Fellowship, a program that builds community among recent Columbia graduates in tech and connects them with senior alumni mentors across various paths in the industry.
Research · Sep 2023 - May 2024
Student Researcher · Radiation Oncology
Built a causal forest model for Glioma (brain tumor) progression to determine patient survival probability, applying causal inference machine learning at the intersection of mathematics and medicine.
Internship · May 2023 - Aug 2023
Clinical Business Analytics Intern · Palo Alto, CA
Worked on clinical business analytics, applying data visualization and SQL to surface insights across Stanford Health Care's operations.
The mathematical training behind the work: fluid dynamics, optimization, probability. For his capstone, Raunak and his colleagues investigated the Kutta-Joukowski theorem, focusing on optimal airfoil design.
At Columbia, he also established a pre-professional society to help musicians explore careers beyond performance, reflecting a long-held belief that the skills built in a conservatory translate everywhere.
Alongside his technical studies, a Hindi course sparked a self-driven exploration of the Urdu script, leading him to fall in love with Nastaliq calligraphy.
Coursework
Recordings
Photos