Hayrettin Tüzel
@gamificationguy

Founder @ flalingo· AI-powered Language Learning · Ex-Algolia, Internetstores

 Heilbronn, Germany
flalingo.com/en/speaking-clu…
Joined August 2014
294 Photos and videos
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One More Prompt..

It is eleven at night. I was going to fix one thing, the color of a button. I write the prompt, hit enter, and text starts streaming across the screen. That stream is a feeling all by itself. I have
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Why Gamification Is So Hard to Build

I rebuilt the streak counter at Flalingo three times. Not because I'm a bad engineer. Because every time, I underestimated the same thing. The streak you see on screen is maybe 5% of the actual work.
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Claude Told Us We Were Using It Wrong. So I Changed the Workflow.

A few days ago, I wrote the most viral post of my life about Claude Code pricing. 210K+ impressions on X. 100+ upvotes on Reddit. A lot of people clearly felt the same pain. At first, I thought the

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Dijital Burokrasi.

AI'ya tek bir görev verdik: bürokrasiyi öldür. AI bürokrasiyi inceledi. Her kalıbı, her hiyerarşiyi, her onay zincirini, her devir teslim protokolünü öğrendi. Sonra en iyi bildiği şeyi yaptı. Daha
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Everything Changed While You Were Sleeping

Last week Andrej Karpathy left an AI agent running on a single GPU before going to bed. By morning, the agent had run 700 experiments. And they actually worked. The way Karpathy described it stuck
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The 10-Hour Rule: Why the Best AI Coders Write Zero Code on Day One

Everyone's talking about AI coding speed. "Built an app in 30 minutes." "Shipped a feature in one prompt." "Replaced my entire dev team." Cool stories. Most of them fall apart at the first real user.
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SaaS Is Dead. I Buried It in 15 Days - 2 (Product Demo)

I'm CTO of Flalingo, Turkey's largest online English learning platform. 130K+ students, 2,500+ teachers, 40+ countries. Bootstrapped. Last month I looked at our Intercom + Pipedrive invoice and

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Great AI Output Starts With Great Context

Many people working with AI think the main job is writing prompts. My experience has been a bit different: The critical work starts before the prompt. It starts with building context. Sometimes I
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Why do two people using the same AI tool get 10x different results?

A few weeks ago I noticed something in my team, and I can't stop thinking about it since. I gave two people the same task. Same AI tool, same access, same brief. One finished in 30 minutes, output
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Jack Dorsey Cut 4,000 People Yesterday. The Company Isn't Failing. It's Growing. The Reason: AI.

Jack Dorsey yesterday announced the hardest decision in Block's history (Square, Cash App): cutting from 10,000+ to under 6,000. Over 4,000 people are out. The company isn't struggling. Gross profit
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SaaS Is Dead. I Buried It in 15 Days. Here's the Proof

Last month I looked at the invoice from Intercom and something inside me said "enough." $132/seat/month. Plus $0.99 for every AI response. We have tens of thousands of students. You do the math.
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Are you saying "okay" to everything that AI produces?

AI literacy is the most critical skill of 2026. When the printing press was invented, books became accessible to everyone. But owning a book wasn't the same as being literate. Societies that closed
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