Efe Çavuşoğlu

Data scientist. Building consumer apps for the things I’m into.

About

Summary

I’m a data scientist at Quin AI, where I build ML pipelines, segmentation models and customer analytics products in Python and PySpark. I also work with the product team regarding how we use our data.

Outside that I design and ship consumer iOS apps. All three of them started as a problem I personally had — investing, cars, collecting — which is the only brief I trust. I have a hands-on BMW coding and retrofit background (ESYS, ISTA); that’s where MyEtho came from.

Role
Data Scientist, Quin AI
Degree
B.Sc. Management, Bilkent University
Graduated with CGPA 3.69/4.00
Magna Cum Laude
Rank
6th of 159 graduates · top 4%
Before
Data Analyst, hop Technology
TA, Business Analytics
Based
Ankara, Turkey
Shipping
3 iOS apps in TestFlight
Into
Movies · Cars · Technology · Photography · Travel · LEGO

Apps

Things I built
because I wanted them

Figdex

LEGO collection tracker

I’ve been building LEGO since I was a kid and never stopped — somewhere along the way I lost track of what I actually owned. Figdex fixed that: barcode scanning into a searchable collection, a wishlist that survives set retirement, CSV import/export, and a Discover feed for new releases.

  • SwiftUI
  • SwiftData
  • Firebase
  • Rebrickable API
Currently in TestFlight — App Store release 2026
Figdex collection screen
Figdex set detail
Figdex Discover feed

MyEtho

Live ethanol sensor monitor

Pairs over BLE with a custom hardware sensor and reads ethanol content off the fuel line in real time. Live readings, session logging, and blend calculators for working out what’s actually in the tank. It came out of my own BMW retrofit and coding projects.

  • SwiftUI
  • CoreBluetooth
  • BLE hardware
  • Bilingual EN/TR
Currently in TestFlight — App Store release 2026
MyEtho live ethanol reading
MyEtho mix calculator
MyEtho fuel blend calculator

PortfolioLab

Investing companion, built for BIST

Live BIST, forex and gold tracking with real portfolio P&L, plus the risk analysis retail investors here rarely get in a phone app: Sharpe ratio, portfolio σ, and diversification breakdown.

  • SwiftUI
  • SwiftData
  • Swift Concurrency
  • Live market data
Currently in TestFlight — App Store release 2026
PortfolioLab portfolio overview
PortfolioLab live watchlist
PortfolioLab Risk Lab — Sharpe and portfolio σ

Stack

What I work in