BA

Built to stand.

Kastel is a two-person web studio in Banja Luka. We design and build sites for companies, restaurants, and projects that deserve better than a template.

Banja Luka00:00:00

Down the Vrbas by dajak

The camera rides a dajak down the Vrbas to the walls of the Kastel, lifts off the water, runs to the gate and goes through it. Made from real photographs of the fortress.

Where the name comes from

Nothing at the Kastel was built all at once.

Romans laid the first course.

Ottomans built on it.

Austrians built on that.

Every layer had to carry the one above it, so every layer was laid properly.

We work the same way.

Structure first, then the surface.

A site that only looks good is a set.

We build the thing that holds.

  1. Romans1st century
  2. Ottomans16th century
  3. Austrians19th century
  4. Ustoday

What we have built

Three sites in daily use. Not mock-ups, things that work.

Ace Esports

2025
Snimak sajta: Ace Esports

A platform for esports tournaments. Team registration, payment and entry codes, all in one place.

  • Site
  • Registration and teams
  • Card payments
  • Admin panel

Wall Concept

2025
Snimak sajta: Wall Concept

A 55 m² modular house that arrives folded on a truck and unfolds in two days.

  • Site
  • Video presentation
  • Gallery
  • Showroom map

Sushi Jelena

2025
Snimak sajta: Sushi Jelena

A sushi restaurant in the town centre. A menu that changes without calling a developer.

  • Site
  • Menu
  • Gallery
  • Contact and bookings

What we do

How it goes


Survey

We look at what you have, who it is for, and what is actually in the way. Usually a week, and it is mostly questions.

Foundations

Structure, content and the shape of the thing, settled before any of it is styled. This is where the work gets decided.

Build

Design and code together, in the browser, where you can see it. You have a live link the whole way through.

Open the gate

We launch it, watch it for a while, and stay on for what it needs after. Nothing gets handed over and forgotten.

The people behind Kastel

We started Kastel because we wanted to build sites we could genuinely put our own names to.

There is nobody standing between you and the people doing the work. From the first idea to the last detail, all of it passes through our hands.

builds it, then checks it

Đorđe

Design, front end and cybersecurity

Looks after how the project looks, how it is used and how secure it is. From the first sketch to the last line of code, he has a hand in building what you see.

LinkedIn

carries what is underneath

Vuk

Back end and infrastructure

Looks after what you never see but which makes everything work. Data, servers, payments, performance and infrastructure, his part of the job is that everything under the surface stays steady and dependable.

Two people. One project. From the idea to the finished thing.

Tell us what you are building.


It is 00:00:00 in Banja Luka.

The camera rides a dajak down the Vrbas to the walls of the Kastel, lifts off the water, runs to the gate and goes through it. Made from real photographs of the fortress.