4x founder

Ahmad Roumie

CTO @Sellara (a16z sr) | prev. YC founder @rex.fit (acq.)| robotics/AI @ETH Zürich

Founder

rex.fit· Winter 2023 🇺🇸 San Francisco, California, United States

in LinkedIn

2025Founder· Sellara

Founder · since 2017

Company

Sellara

Role

Founder/CTO

current

Stage

—

no public source

Raised

—

no public source

Based

—

Founder / co-founder — the company's markEmployee / research role

Source: LinkedIn work history

Profile coverage5 of 7 · missing posts, contact

rex.fit

Automating nutrition tracking.

Winter 2023

Experience

Career

Sellara
Founder
Founder/CTO · 2025 – Present
2025
Rex.fit (YC W23)
Founder
Founder/CEO/CTO · 2023 – 2025
2023
AI Retailer Systems
AI/CV Lead, tech lead (practically CTO) · 2022
2022
AI Retailer Systems
Founder
Machine Learning and Computer Vision Engineer (Founding Engineer) · Zurich, Switzerland · 2020 – 2022
2020
Franke Coffee Systems
Computer Vision/Robotic Calibration Engineer (External) · 2022
2022
ETH juniors
Lead Computer Vision Engineer/project manager · 2020 – 2022
2020
ETH Zürich
Master Thesis with Prof. Roland Siegwart (Autonomous Systems Lab - ASL) · Zurich, Switzerland · 2020
2020
Waygate Technologies
Robotics Software Engineer · Zurich, Switzerland · 2019 – 2020
2019
ETH Zürich
Graduate Teaching Assistant · Zürich Area, Switzerland · 2018 – 2019
2018
Duckietown
Graduate Teaching Assistant · Zürich Area, Switzerland · 2018 – 2019
2018
LAAS (Lebanese Aerospace and Automotive Society)
Co-founder
Co-founder and VP · Beirut District, Lebanon · 2017 – 2018
2017
University of California, Berkeley
Visiting Researcher at Szeri Lab · 2017
2017
American University of Beirut
Student Researcher · 2017
2017
American University of Beirut
Student Research Assistant · 2016 – 2017
2016
MEA
Trainee at Middle East Airlines Training Center MASCO · Beirut District, Lebanon · 2016 – 2017
2016

Bio

On a mission to fully automate nutrition tracking - Order the DROP on kickstarter. Roboticist and calisthenics athlete. Previously worked on autonomous retail stores using computer vision, also worked on autonomous robots ((legged, UAVs, and crawlers)