Seemanta Bhattacharjee

Seemanta Bhattacharjee

I’m a computer science PhD student at CU Boulder, advised by Ramin Ayanzadeh. I’m interested in what it takes to run useful quantum computations on real hardware, and how AI can help improve quantum computers. I enjoy algorithmic puzzles, building software, and making computers do what I want.

Publications & research

Publications
Classification of Financial Data Using Quantum Support Vector Machine
Seemanta Bhattacharjee, Md. Muhtasim Fuad, A. K. M. Fakhrul Hossain
Poster at AQIS 2023 · undergraduate thesis

For my undergraduate thesis, we compared quantum and classical support vector machines using Dhaka Stock Exchange data. We explored how performance changed with dataset size, feature count, and quantum kernel design.

Advised by Omar Shehab (IBM Quantum) and A. K. M. Fakhrul Hossain (SUST).
Research projects
Evaluating Retrieval-Grounded Agentic Systems for Qiskit Code Generation
Daiki Murata, Seemanta Bhattacharjee
QAMP 2025

We tested whether giving LLM agents access to Qiskit documentation could help them generate better code. Our system split the work between planning, coding, and execution agents. On Qiskit HumanEval, it improved Pass@1 by up to 15.9 percentage points over single-pass generation on the mid-sized open-weight models we tested.

Advised by Urbano França (Harvard Medical School) and Francisco Villaescusa-Navarro (Simons Foundation).

Open source

NVIDIA/cuda-quantum — topology-aware initial placement for the qubit-mapping pass
Improved CUDA-Q’s initial qubit placement by comparing candidate mappings with simulated routing. This reduced SWAP counts in tests on path, ring, and grid layouts. Merged during unitaryHACK 2026.
Qiskit/qiskit — transpiler correctness fix
Fixed a bug in Qiskit’s transpiler that could produce incorrect measurement results after circuit optimization. Other contributions include documentation fixes and API deprecations.
amazon-braket-sdk-python — parametric math functions · neutral-atom lattice factories
Added math functions such as sin, cos, exp, and log to parameter expressions, with support for OpenQASM export. This was merged during unitaryHACK 2026. In unitaryHACK 2025, I added helpers for creating square, triangular, and honeycomb lattices for neutral-atom devices, released in v1.93.0.

Contest programming

ICPC Asia Dhaka Regional · top 10
Top 1% of 1,200+ teams. · 2023
Meta Hacker Cup · top 8%
20,000+ contestants globally. · 2023
Google Kick Start · top 2%
Round A · 17,000+ contestants. · 2022
Multiple national IUPCs · top 10
Inter-University Programming Contests. · 2019–23
Bangladesh Math Olympiad · Champion
Chattogram divisional round. · 2013
National High School Programming Contest · 2nd place
Divisional round · 100+ participants. · 2016

Outreach & service

SUST Competitive Programming LabTrainer
2022 — 2024
Coached 200+ students, including students on teams that reached the ICPC World Finals.
Bangladesh Math OlympiadAcademic team
2018 — 2020
Authored problems for cohorts of 40,000+ national participants.
Guest workshopsPUST · Chittagong Junior Coders
2018 — 2023
Taught ICPC preparation at PUST for three months. Two teams qualified for the first time in university history. Also taught introductory algorithms to 50 high school students at CJC.
Co-author of Introduction to Math Olympiad, a Bengali primer for primary-school students (Swapno '71 Publication).
2023
Problem setter
CodeChef · HackerEarth · CodeDrills
IUPC judge
KUET BitFest '25 · IUT 11th ICT Fest '24 · SUST CSE Carnival '24 · 15th IIUC IUPC '23 · SEC Junior PC '22

Industry

At Re:tune (Nov 2023 to Jun 2026), I worked on an AI coding product. I built its browser editor and the systems for versioning files, saving project snapshots, and coordinating AI agents. I also helped build SierraRomeo, an aviation research assistant that answers questions using more than 60,000 FAA documents and links to its sources.

I also worked on 10xlaunch, a tool for identifying website visitors. It ranked #1 Product of the Day and among the top five products of the month on Product Hunt in August 2024.