Sebastian Marrero
sebastian marrero
strategy & operations — building with AI
new york city

I'm a generalist with a background in financial technology and a growing focus on AI products and strategy. Previously at Nomura Securities (Instinet) where I held Series 7, 57, and 63 licenses — working at the intersection of electronic trading infrastructure, client analytics, and product development. I studied Economics at Vanderbilt University, having transferred from Houston Community College. Outside of work I DJ, think about fashion, and attend public lectures on whatever seems interesting.

Nomura Securities (Instinet) · Technology Solutions Analyst
Jul 2023 – Nov 2025 · New York, NY
Drove software licensing onboarding for 50+ broker connections generating $260K in annual revenue. Coordinated sprint cycles across product, QA, and engineering to deliver trading platform enhancements including new asset class integrations. Built dashboards tracking system usage across a global client base, informing performance improvements and client workflow changes.
Columbia University — LEAP · Winter 2026 Momentum Bootcamp
Jan 2026 · New York, NY
Analyzed large-scale climate datasets (NASA CERES ocean temperature and radiation data) using Python and Xarray. Applied RNNs, CNNs, and LSTM models to predict global temperature maps from CO₂/CH₄ time series.
Castle Placement · Analyst (part-time)
Aug – Dec 2022 · Remote
Compiled investor profiles on Canadian agritech companies targeting $812M in capital raises. Conducted private market research via PitchBook and CapIQ for PE, VC, and pre-IPO clients.
Bernstein · Private Wealth Management Intern
Jun – Aug 2022 · Washington, DC
Assisted advisors managing $1.6B AUM. Forecasted wealth scenarios for HNW clients and conducted due diligence on private equity and impact products.
Archive Search
resale-search.vercel.app

Natural language search across 15 resale platforms — Grailed, Depop, Vestiaire Collective, The RealReal, Yahoo Japan, Mercari Japan, and more. Parses queries with the Claude API and generates optimized deep-link URLs with size, color, and condition filters. Built with React + TypeScript, deployed on Vercel.

Seb's Archive Shop
sebs-vintage-and-archive-shop.myshopify.com

Archive menswear resale — the project that led to building Archive Search.

Vanderbilt University
B.A. Economics · Minors in Data Science and Business
Aug 2020 – May 2023 · Nashville, TN
Dean's List: Fall 2021, 2022, Spring 2023
Houston Community College
A.S. Engineering Science
Aug 2019 – May 2021 · Katy, TX
Dean's List: Fall 2019, Spring 2020 · transferred to Vanderbilt

A selection of independent data projects. Less central to where I'm headed, but they show how I think.

Credit Card Fraud Detection · Supervised classification (LightGBM, XGBoost) on imbalanced data. 79% recall. · github
SaaS Churn Modeling · End-to-end churn prediction with Random Forest and interpretability analysis. · github
Airbnb Market Analysis · SQL + Python sentiment analysis on NYC short-term rental data. · github
Unicorn Company Analysis · Global startup funding trends via MySQL + Tableau. 1,200+ companies. · github
Dres & Seb · DJ duo
@dresnseb · @element.underground
Deep, minimal, and tech house. Based in New York.
Vanderbilt Business Review · Staff Writer · 2022–2023
Published on H-1B immigration, China's technology transfer policy, and international labor markets.
Parker Solar Probe · NASA · 2018
My name is on a spacecraft currently in orbit around the Sun.
parkersolarprobe.jhuapl.edu