Relja

Solo dev from Serbia building apps with AI, in public.
Postcon: one video to TikTok, Reels, and Shorts.
Tripsy: group trip planner.
DMs open.

[Relja @relja_pavlovic]

Build in public, Day 7

7 days in, and I never introduced myself 😅

I’m Relja, a 22-year-old CS student from Serbia. I also work in a small café.

Started coding less than a year ago. Now I build apps with AI: Postcon and Tripsy.

Sharing every win and fail here.

[Relja @relja_pavlovic]

@lucaardito Hey Luca nice to meet you too! I would like to connect. What are you up to these days?

[Relja @relja_pavlovic]

Build in public, Day 7

7 days in, and I never introduced myself 😅

I’m Relja, a 22-year-old CS student from Serbia. I also work in a small café.

Started coding less than a year ago. Now I build apps with AI: Postcon and Tripsy.

Sharing every win and fail here.

[Relja @relja_pavlovic]

@LauraLoumd I would love to! What are you on to today?

[Relja @relja_pavlovic]

Build in public, Day 9

Rest day. No code today.

Some days I open my laptop and have zero ideas what to build next.

So today I just studied, worked at the café and let my head rest.

Building with AI is fast. My brain still isn't 😅

[Relja @relja_pavlovic]

@PineWoodsAI Its all random sometime when i am on coffee with friends, when i am chatting with claude and fixing something new idea pop up. And there is some days without anything.

[Relja @relja_pavlovic]

Building Tripsy, a group trip planner.

Plan days on a map, split costs, and ask AI for places to visit.

Would you pay for something like this? How?

[Relja @relja_pavlovic]

Build in public, Day 8

Still looking for a new name for my group trip planner.

@domhaul suggested Tripstamp, and I really like it. It fits, the whole design is travel stamps.

Tripstamp, or do you have a better name?

[Relja @relja_pavlovic]

@kushmergedeck @0xMovez Yea. That is because it get into your app and takes screenshots of the pages.

[Relja @relja_pavlovic]

Gave Claude my app names and links.

That's it. It made these motion videos for my apps Postcon and Tripsy 👇

No After Effects. Still a bit shocked.

Inspired by @0xMovez

[Relja @relja_pavlovic]

@kushmergedeck @0xMovez Just one try. I copied one of the prompts from the post replaces name of my app and website and got this videos. Its crazy what it can do.

[Relja @relja_pavlovic]

@gaelmelen I am building a bunch of side projects. Now i am working on on app called poston it is for uploading vertical videos to tiktok, reels and shorts. Trying to get better at coding and meet some new people.

[Relja @relja_pavlovic]

@mianoedwin_ Thanks, means a lot! Café shifts, coding and uni is no joke. What are you building right now?

[Relja @relja_pavlovic]

@federicodonaton I love creating stuff and coding that why. When i start creating something i go maybe too deep in that and lost track of time. Lets connect.

[Relja @relja_pavlovic]

@anupamrjp https://t.co/1UglUmPvu2

[Relja @relja_pavlovic]

@Vaibhav_Gareja I would love to!

[Relja @relja_pavlovic]

Build in public, Day 6

TikTok posting works, but only as "Only me" until TikTok's Content Posting API audit passes. Submitted it, now waiting.

Next wall: Meta. I'm locked out of my old Facebook accounts and the AI support goes in circles.

Anyone actually recovered one?

[Relja @relja_pavlovic]

Small story from today:

I needed demo videos for Postcon and Tripsy. In Claude Code I just typed "Lets /brag it".

That's it. The "brag" skill made the videos.

Building takes weeks. Showing it took one message.

[Relja @relja_pavlovic]

Try it here (still on a Vercel link): https://t.co/OLQS1N8Ep1

Open the Lisbon example to see it without making a trip.

[Relja @relja_pavlovic]

Build in public, Day 5

Made a side project for fun: Tripsy, a trip planner for groups. Shared plan, map, and it splits bills with the fewest payments.

Problem: a travel app called Tripsy already exists.

Need a new name before I buy a domain. Ideas?