Predrag Božić

Web Application Development

A web application should fit the way your business works.

I build web applications for processes that need more than a presentation website: user accounts, data, bookings, administration, payments, search, automation, and complex business logic.

The goal is not to force an existing workflow into a ready-made template. The system should be designed around the way the business actually operates.

A web application makes sense when

01

The current process depends on several spreadsheets, emails, or repetitive manual steps.

02

Off-the-shelf SaaS does not support the specific rules of your business.

03

Different users need to see and do different things.

04

Data needs to be connected, searchable, and available in one place.

05

The workflow needs automation, integrations, or AI functionality.

Web application development

There is no single type of web application.

The technology may be similar, while the business problem, users, and system rules can be completely different.

01

Booking and reservations

Availability, calendars, pricing, user accounts, bookings, administration, and payments connected in one coherent workflow.

02

Business administration systems

Internal tools for data, users, workflows, records, and processes that have outgrown spreadsheets, email, or manual administration.

03

Marketplace platforms

Multiple user roles, supply and demand, profiles, filters, bookings, multilingual content, and business rules working together.

04

Customer portals

Protected areas where users can access data, manage accounts, follow processes, and use functionality specific to their role.

05

Data and search products

Large datasets turned into useful search, filtering, ranking, and information that helps users make better decisions.

06

AI inside applications

Translation, analysis, recommendations, content processing, and user assistance integrated directly into an existing business workflow.

More than an interface

The hardest part of an application is often invisible.

Behind a good interface are data models, rules, permissions, validation, security, and processes that must remain reliable as the system grows.

01

Data modelling and relationships between different parts of the system

02

User roles, permissions, and protected workflows

03

Validation and business rules

04

Bookings, occupied dates, and time-based logic

05

Payments and third-party integrations

06

Multilingual and localized content

07

SEO and public pages where organic visibility makes business sense

08

AI functionality connected to real data and workflows

Development process

From the problem to a first version that already delivers value.

01

Problem

We first define what is not working today and what the new system needs to change.

02

Rules

We break down users, data, workflows, constraints, and exceptions.

03

First useful version

We choose the smallest scope that already solves a real problem and can be tested in practice.

04

Development

The application is built iteratively and validated against real-world scenarios.

05

Growth

New modules, integrations, automation, or AI are added when there is a real reason for them.

Proof through projects

completely different kinds of problems

The same stack does not mean the same problem.

A school timetable, a worker marketplace, a physical touch kiosk, and a developer opportunity platform have very little in common at first glance.

That is exactly why they are useful proof that web application development is not simply assembling components. It is about understanding very different business rules.

View selected projects

Web application development · cost

How much does a web application cost?

A simple customer portal and a marketplace with several user roles, bookings, payments, and AI functionality are not the same project.

That is why I do not estimate a project by the number of screens. The real scope comes from functionality, business rules, integrations, and what the first useful version needs to achieve.

Business logic

How many rules, exceptions, and different workflows the system needs to support.

Users and administration

User roles, permissions, profiles, dashboards, and how data needs to be managed.

Integrations

Payments, email, file storage, external platforms, AI, and other services.

Scope of the first version

What the product needs in order to solve a real problem now, and what can reasonably come later.

After a short conversation about the problem, I can suggest what the first version should include and provide a much more realistic estimate of scope and cost.

Frequently asked questions

Before we start.

How much does web application development cost?

The cost depends on the complexity of the business logic, number of user roles, data model, administration, integrations, payments, multilingual content, and other functionality. A realistic estimate starts with defining the problem and the first useful version of the system.

What is the difference between a website and a web application?

A website primarily presents information. A web application allows users to work with data, accounts, bookings, workflows, administration, and other interactive functionality.

Do we need to build every feature from the beginning?

No. It is often better to start with a functional first version that solves the most important problem, test it in real use, and then expand the system deliberately.

Do you also build the administration side of the application?

Yes. In a serious business application, administration, user roles, data management, and process control are often just as important as the public-facing part of the system.

Next step

Tell me what is not working. We can choose the technology later.

You only need to know what is difficult today and what you would like to make simpler, faster, or more reliable.

Discuss your project