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 two of us

You talk to the people who build it. There is no account manager and nothing gets handed down to a junior.

builds it, then checks it

Đorđe

Design, front end and cybersecurity

Does the drawing and most of the building, so the thing you approve is the thing that ships.

Also handles security: that the site holds up when someone starts poking at it, not only while you are looking at it.

Talk to him about how it should look, how it should read, and how well it holds.

[email protected]LinkedIn

carries what is underneath

Vuk

Back end and infrastructure

Everything under the surface: data, ordering, payments, servers, and keeping all of it up.

Talk to him about what the site actually has to do once real people are using it.

[email protected]

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.