$ founder · engineer · girvak alumni
Doruk
Gezici
Curious hacker. Founder of POPJAM.IO, building agentic marketing from Stockholm and Istanbul.
// 01 · now building
POPJAM tests your ads on AI personas, before you spend a dollar.
Most ad budgets pay a tax called the learning phase: real money spent finding out a creative doesn't work. POPJAM moves that guesswork onto silicon.
01 $ popjam generate
AI agents create platform-native creatives for Meta, Google, TikTok, LinkedIn and Reddit: images, video, and animation, on-brand from your own research.
02 $ popjam simulate
Synthetic personas built from brand, industry and competitor research react to every creative. No real customer data needed, GDPR-safe by design.
03 $ popjam iterate
A/B test hooks, angles and headlines against the panel, fix weak spots, and launch only the validated winners.
"I built POPJAM because the learning phase is a tax on every campaign. Now the guesswork runs on silicon, not budget."
// 02 · track record
A decade of shipping: three startups, a fellowship, and a pile of open source.
doruk@gezici:~$ git log --oneline career
a9f3e21 (HEAD -> now, tag: 2025) found POPJAM.IO: agentic ad creation, synthetic persona testing
8f40d12 (tag: 2023..24) start and lead Dema's Platform Integration team: ETL pipelines, a Shopify app, faster onboardings
6b7e9a1 (tag: 2022..23) co-found Udext (CTO): frontline workforce messaging and automation
3e8fa90 (tag: 2018..21) co-found Gamer Arena (CEO): competitive esports platform for the MENA region
7c1d0b4 (tag: 2018) join Türkiye Girişimcilik Vakfı fellowship, stay on as alumni
d24c77b (tag: campus) ship ITUscheduler: course scheduler for Istanbul Technical University
0b1afe3 initial commit: a curious kid, a guitar, and a terminal
open source, verifiable on github/dorukgezici: 57 public repos, including:
// 03 · index
Eight things I shipped and still like.
- 01
POPJAM
AI ad maker that tests creatives on synthetic personas before you spend
#startup #ai live ↗ - 02
Gamer Arena
Competitive esports platform
#startup live ↗ - 03
Astro DecapCMS OAuth
Astro integration for Decap CMS with a custom OAuth backend
- 04
ITUscheduler
Istanbul Technical University course crawler and scheduler
- 05
Subabot
AI-powered Slack bot that tracks keywords on RSS feeds
- 06
CryptoPatro
Cryptoasset portfolio tracker and trading assistant bot
#bot #oss source ↗ - 07
SDG - Personal Site
Pixel-art personal website with an interactive touch
- 08
Yeşil Mavi Hayat
Book promotion website
// 04 · after hours
Jams, not ads.
When the terminal closes, the guitar opens. Blues rock jams and songs, straight from the practice room.
more on soundcloud.com/dorukgezici
// 05 · writing
Notes from the build log.
- How to Set Up Kimi 2.5 with Pydantic AI and Nebius AI medium · Feb 2026 ↗
- 2026 Agency Playbook: Scaling Ad Personalization Without Scaling Headcount medium · Jan 2026 ↗
- Agentic Marketing is Here: How to Simulate Your Audience Before You Launch medium · Jan 2026 ↗
- How to Setup Python Flask App on Shared Hosting without Sudo medium · May 2017 ↗
newsletter on dorukgezici.substack.com · archive on dorukgezici.medium.com
// 06 · pick your exit
Two ways out of this page.
$ marketing something?
Test your next ad on AI personas before you spend. POPJAM gives you 500 free credits: no credit card, no sales call, first ad in seconds.
$ everything else
Partnerships, investing, open source, speaking, jam sessions: my inbox and calendar are open.