Hi, I am Sina.

I am a software engineer who loves building web applications.

ABOUT

With over 5 years of experience in building web software, my journey has taken me from hacking together tens of solo projects to co-founding a YC-backed company. I love shipping products that people use.

EXPERIENCE

Librar Labs (YC W26)

August 2025 - February 2026

Librar Labs (YC W26)

Co-Founder, Software Engineer

Backed by Y Combinator
Backed by SSE Business Lab
librarlabs.com
Kollin

May 2024 - August 2025

Kollin

Fullstack Developer

kollin.io
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
Sep 2025
Aug 2025
Jul 2025
Jun 2025
May 2025
Apr 2025
Mar 2025
Feb 2025
Jan 2025
Dec 2024
Nov 2024
Oct 2024
Sep 2024
Aug 2024
Jul 2024
Jun 2024
May 2024
Apr 2024
Mar 2024
Feb 2024
Jan 2024
Dec 2023
Nov 2023
Oct 2023
Sep 2023
Aug 2023
Jul 2023
Jun 2023
May 2023
Apr 2023
Mar 2023
Feb 2023
Jan 2023
Dec 2022
Nov 2022

Bibbi

Bibbi

November 2024 - September 2025

AI-powered book discovery for librarians and booksellers

Show details

LinkedEleven

LinkedEleven

May 2025 - June 2025

Daily puzzle where you connect two football players through shared lineups

Show details

Serene

December 2024 - January 2025

AI-generated personalized meditations that adapt to your mood

Show details

LingoMoose

October 2024 - November 2024

Learn languages through music

Show details

Vantacore

Vantacore

May 2024 - August 2024

Aggregated trustworthy tech reviews into concise insights

Show details

JetKampüs

June 2023 - November 2023

EdTech platform helping students prepare for university entrance exams in Turkey

Show details

written.by

February 2023 - June 2023

AI-powered writing assistant

Show details

EDUCATION

Y Combinator

Y Combinator

Winter Batch 2026

San Francisco, CA

KTH

KTH

Computer Science

Stockholm, Sweden

POSTS

CONTACT

Get in touch

usinakenes1907@gmail.com

GITHUB