Zajmi
From a calculator that asked for the interest rate, to an app that finds the cheapest loan for you.
- Role
- Design engineer — idea, brand, product
- Scope
- Brand · Design system · iOS · iPad · Web
- Timeline
- 2022 – 2026
- Live
- zajmi.rs

01 — Problem
The calculator asked the wrong question.
The 2022 version made people enter an interest rate — the one number they came to find out. Comparing banks meant opening five tabs and a spreadsheet.
The redesign starts from what a person actually knows: how much they need and for how long.
02 — Approach
Ask less, compare more.
Three decisions shaped everything else.
- 01
Two inputs, not seven
Amount and term. Everything else is pulled or assumed, and can be refined later.
- 02
Total cost first
Offers are ranked by what you pay back in total, not by the headline rate.
- 03
One system, three screens
Tokens and components shared across iPhone, iPad and web.
03 — Design system
A system, not a set of screens.
Colour, type and spacing live as variables with light and dark modes, so a rebrand is a token change rather than a redraw.
- Variables
- colour, type, spacing
- Components
- buttons to offer cards
- Breakpoints
- iPhone · iPad · web
- Languages
- Serbian · English
04 — Outcome
Where it stands.
Design is complete across three platforms and the domain is live with a coming-soon page. Next: an informational comparison site built on the same system.
Full case study










