Software Engineer

Demirhan Atabey

mobile, backend, robotics. been shipping production code since 16 — from startup apps to embedded systems. Currently building robots.

The Timeline
2018
wrote my first python script
I was 13. thought i'll be really cool. wrote some stuff. it was too hard back then.
2019
came back to python
turns out you can't really quit this thing. picked it back up and actually stuck with it this time. sold software to some local stores in my town, bought a macbook with that money.
2020
discovered swiftui
apple announced swiftui and i was immediately hooked. started building ios apps and never looked back.
2022
first real jobs
built ios apps for startups in istanbul, new york, and london. shipped apps from scratch, hit 10k users, helped raise $200k.
2023
joined poppin as an intern
la-based startup. started remote as an ios intern. rebuilt their app in 3 months. 3,000+ commits. helped them raise $2M.
2024
became the cto
led 4 engineers. migrated backend from firebase to go/postgres. cut latency from 4.5s to 300ms. built ci/cd. did basically everything.
2026
founding engineer, robotics
now building something new. can't say much yet. it involves robots though, which is cool.
Work
Founding Engineer
Stealth
02/2026 — now
San Francisco, CA
building robots.
robotics
CTO
Poppin Technologies
02/2025 — 02/2026
Los Angeles, CA
migrated entire backend from firebase to sql in 1.5 months. led 4 engineers. cut request latency from 4.5s to 300ms. built v6.0 of the ios app. scaled the app to 250K+ users.
goedgedbpostgresswiftuici/cd
Lead iOS Developer
Poppin Technologies
10/2024 - 02/2025
Los Angeles, CA
Build the v5.0 of the app alone, scaled the app to 150K+ users
goedgedbpostgresswiftuici/cd
iOS Developer
Poppin Technologies
06/2023 — 12/2024
Los Angeles, CA
built ios app versions 3.0 & 4.0. rebuilt the app in 3 months for their $2M seed round. 3,000+ commits to ios, 1,000+ to backend.
swiftswiftuiuikitstreamchat
iOS Developer
BHuman.ai
01/2023 — 05/2023
London, UK
led ios dev with 3 engineers. built a visual flow builder with mesh topology for personalized ai videos. sqlite + crdts for real-time sync. also made a siri extension because why not.
swiftuisqlitegrdbcrdtsavkit
iOS Developer
Ouishopp Inc.
12/2022 — 06/2023
New York, NY
designed ui in figma, built the ios app from scratch. published to app store, hit 10k mau in month one. helped secure $200k pre-seed.
swiftswiftuifigma
iOS / AR Developer
Buddy Inc.
09/2022 — 12/2022
Istanbul, Turkey
migrated arkit-corelocation to realitykit. built ar navigation for restaurants. ported flutter app to native swift — 3x performance improvement.
arkitrealitykitswiftswiftui
Projects

kind of irrelevant today because of ai, but i had fun building these back then.

BME
Course Hub
interactive study materials for all my bme courses. programming, algorithms, architecture, and more.
SwiftUI Particles
a particle effects library for swiftui. contributed to making declarative particle systems actually usable. (got sherlocked)
View on GitHub
Globe
a scenekit dot-globe for ios. renders earth with dots and lets you interact with it.
View on GitHub
MagneticScroll
a swiftui package built during my time at poppin. scroll mechanics that feel right. (p.s. it didn't work)
View on GitHub
InteractiveMap
svg parsing library for swift & swiftui. migrated complex parsing from obj-c to swift, first open-source project.
View on GitHub
Education
Budapest University of Technology and Economics
B.Sc. Computer Science Engineering
09/2025 — present
Budapest, Hungary
Ecole 42
Software Engineering
06/2023 — 08/2025
Istanbul, Turkey
Contact

let's talk

currently based in budapest. always down to chat about mobile apps, robotics, startups, or whatever you're building.

demirhanm.atabey@gmail.com