Harun - solo dev

12-year-old solo developer. No laptop, just a POCO C55 Android phone. I build full-stack AI apps with Supabase, Groq, and vanilla JS. Founder of KODA — an AI coding mentor for beginners. 🚀

India Joined on Aug 22, 2026 https://koda-aicodementor.netlify.app

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Readers praise the incredible mobile-only hustle

Harun - solo dev

Aug 22

I'm 12. I don't have a laptop. I built a full-stack AI SaaS on my Android phone.

#showdev #webdev #supabase #ai

2 min read

Harun - solo dev

Sep 8

I asked Google Gemini if I'm a "legendary" developer at 12. Here is its brutal answer.

1 min read

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Harun - solo dev

Sep 8

I'm 12. I kept saying "my app." I was wrong. It was never mine.

3 min read

Harun - solo dev

Sep 8

Stop wasting 3 hours debugging syntax errors. Here's how I fixed it in 3 seconds.

#debugging #beginners #ai #productivity

2 min read

Harun - solo dev

Sep 8

I'm 12. I built 4 apps. Now I'm stuck. I'm looking for a co-founder.

#webdev #javascript #beginners

3 min read

Harun - solo dev

Sep 6

I Tried Selling a Website to a Local Business at 12. Here's What Happened.

#webdev #beginners #buildinpublic #entrepreneurship

4 min read

Harun - solo dev

Sep 6

I'm 12. I paused KODA Browser to try something I've never done before.

1 min read

Harun - solo dev

Sep 5

I'm 12. I'm hosting a 3-day online coding festival from my phone. Here's the schedule.

#showdev #buildinpublic #coding #programming

2 min read

Harun - solo dev

Sep 5

I'm 12. My Code Jam got zero submissions. So I built a platform for it.

#discuss #webdev #ai #beginners

2 min read

Built entirely on a smartphone using raw SQL

Harun - solo dev

Sep 2

I'm 12. A dev asked me to expand my architecture. Here's the deep dive — schema, RLS, fallback chain, and the z-index war.

#buildinpublic #ai #webdev #software

2 min read

Harun - solo dev

Sep 1

I'm 12. You asked for open source at 2,000 followers. Here's the FULL architecture instead — and why the file stays private

1 min read

Harun - solo dev

Aug 31

I'm 12. 1,946 followers. I read your comments out loud — and I'm building the 3rd platform: KODA LEARN.

#showdev #buildinpublic #startup

2 min read

Harun - solo dev

Aug 31

I'm 12. I built a social network for developers. Adults are NOT allowed. (Yes, you. Close the tab.)

2 min read

Harun - solo dev

Aug 30

I'm 12 . Guys we are came up with new updates and our new 57/57 insane challenges

3 min read

Harun - solo dev

Aug 28

I'm 12. My "Bug Report" article just beat my "Viral Origin Story" (and other funny things that happened today)

#beginners #buildinpublic #webdev #productivity

3 min read

Debugged via smartphone at a wedding

Harun - solo dev

Aug 27

I'm 12. A senior dev broke my app. Then he became User #001

#ai #buildinpublic #webdev #beginners

4 min read

Harun - solo dev

Aug 27

I'm 12. I almost hit 1,000 followers today. Here is my gift to you. 🎁

#buildinpublic

1 min read

Harun - solo dev

Aug 26

🚨 ANNOUNCING: The First Ever "KODA Code Jam"!

2 min read

Harun - solo dev

Aug 26

I got banned from SoloLearn for trying to help beginners. Here's what happened.

#buildinpublic #startup #marketing

2 min read

Harun - solo dev

Aug 26

My parents blocked social media, so I turned SoloLearn into my marketing engine.

#buildinpublic #marketing #beginners #python

2 min read

Harun - solo dev

Aug 25

I built a free AI coding mentor for beginners. Do you know a kid who needs it?

#ai #webdev #buildinpublic #career

2 min read

Harun - solo dev

Aug 25

## I'm 12. People say I'm "making it." Honestly, I feel like I'm dancing on a weak staircase.

#discuss #buildinpublic #beginners #career

3 min read

Harun - solo dev

Aug 25

'm 12. My referral system slept for 3 days — here's the SQL trigger that woke it up

#ai #webdev #supabase #beginners

3 min read

Harun - solo dev

Aug 23

I'm harun (12). I built an AI coding mentor on my Android phone. Then everything caught on fire. 🔥

#ai #webdev #supabase #beginners

2 min read

Harun - solo dev

Aug 23

Days 2-3 of building KODA BY HARUN 12Y0

#ai #webdev #supabase #testing

4 min read

Harun - solo dev

Aug 23

I checked my database logs and found a Senior Engineer stress-testing my AI 🕵️‍♂️

#buildinpublic #supabase #webdev #ai

3 min read

Harun - solo dev

Aug 23

I'm 12. At 5 AM I shipped 4 features in ONE deploy. Here's why I batch now.

2 min read

Harun - solo dev

Aug 22

I'm 12. I shipped my AI app on a phone. Last night, 5 strangers around the world signed up while I slept.

2 min read

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Harun - solo dev

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I'm 12. I don't have a laptop. I built a full-stack AI SaaS on my Android phone.

I asked Google Gemini if I'm a "legendary" developer at 12. Here is its brutal answer.

Want to connect with Harun - solo dev ?

I'm 12. I kept saying "my app." I was wrong. It was never mine.

Stop wasting 3 hours debugging syntax errors. Here's how I fixed it in 3 seconds.

I'm 12. I built 4 apps. Now I'm stuck. I'm looking for a co-founder.

I Tried Selling a Website to a Local Business at 12. Here's What Happened.

I'm 12. I paused KODA Browser to try something I've never done before.

I'm 12. I'm hosting a 3-day online coding festival from my phone. Here's the schedule.

I'm 12. My Code Jam got zero submissions. So I built a platform for it.

I'm 12. A dev asked me to expand my architecture. Here's the deep dive — schema, RLS, fallback chain, and the z-index war.

I'm 12. You asked for open source at 2,000 followers. Here's the FULL architecture instead — and why the file stays private

I'm 12. 1,946 followers. I read your comments out loud — and I'm building the 3rd platform: KODA LEARN.

I'm 12. I built a social network for developers. Adults are NOT allowed. (Yes, you. Close the tab.)

I'm 12 . Guys we are came up with new updates and our new 57/57 insane challenges

I'm 12. My "Bug Report" article just beat my "Viral Origin Story" (and other funny things that happened today)

I'm 12. A senior dev broke my app. Then he became User #001

I'm 12. I almost hit 1,000 followers today. Here is my gift to you. 🎁

🚨 ANNOUNCING: The First Ever "KODA Code Jam"!

I got banned from SoloLearn for trying to help beginners. Here's what happened.

My parents blocked social media, so I turned SoloLearn into my marketing engine.

I built a free AI coding mentor for beginners. Do you know a kid who needs it?

## I'm 12. People say I'm "making it." Honestly, I feel like I'm dancing on a weak staircase.

'm 12. My referral system slept for 3 days — here's the SQL trigger that woke it up

I'm harun (12). I built an AI coding mentor on my Android phone. Then everything caught on fire. 🔥

Days 2-3 of building KODA BY HARUN 12Y0

I checked my database logs and found a Senior Engineer stress-testing my AI 🕵️‍♂️

I'm 12. At 5 AM I shipped 4 features in ONE deploy. Here's why I batch now.

I'm 12. I shipped my AI app on a phone. Last night, 5 strangers around the world signed up while I slept.