Senior Product Designer · Design systems · Fintech and B2B

Design systemsfor fintech:2 live apps,a brand in 3 days

I'm a product designer at Diletta Solutions, in Campinas, Brazil, designing for banks and retail for five years. I run discovery, user testing, flows and UI through handover, and I write the code of the design system behind two live apps and a web dashboard.

N26
Up Brasil
Banco Bold
Diletta Pay
CPF Seguro
Directo

2 apps + web

live on the same design system, each with its own brand

Directo · Flash Enterprise

197 → 0

files on Ant Design in the web dashboard, in one week

2026

3 days

for Conta Bold to join the system with its own brand. It used to take about six weeks

55 colorsis all the new brand declares. Not one screen is rewritten

+34%

more people finishing sign-up, after the app store step came out and the flow came down to six screens

2products live on that same system, with a third on the way

1 week

for Directo's web dashboard to swap Ant Design for the apps' design system

197 → 0files importing the old library. I wrote the migration code too

Nine cases · tap a screenNine cases · open a folder

Each folder holds the screens of one project. Drag the strip sideways and tap a screen to see it big.Each folder holds the screens of one project. Open it, click a screen, and move through with the arrows.

Design systems

Conta Bold, modo claro

Conta Bold, modo escuro

CPF Seguro

A folha de um componente no sistema

Tipografia · onze tokens

Diletta design system

20 screens

Two live apps and a web dashboard on top of it, from Flutter to web components. A new product gets its own identity by declaring 55 colors, and no component changes.

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Shopper insights, the top of the screen

Brand overview

Products

Plans and credits

The home before, as it was coded

Directo · Flash Enterprise

5 screens

The brand dashboard moved off Ant Design onto the apps' design system: 197 files to zero in one week.

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Digital product

Home

SMS de convite

Boas-vindas

CPF

Criar senha

CPF Seguro

19 screens

Its own app, a version embedded in a partner's app, and an operations panel. The embedded one is live under the other company's brand.

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Spending alert · blank rule

Spending alert · transaction type

Spending alert · alert content

Spending alert · rule name

Spending alert · rule on

N26 · Research and Rules

12 screens

I ran the user tests on the beta onboarding: an account opened in 8 minutes, the confusing step redesigned and tested again. Then a study: the automation stopped asking what day your salary lands and started asking what happens in your life.

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Transferir · as quatro vias

Transferir · o valor

Transferir · o PIN

Transferir · feito

Cartão · fatura fechada

Diletta Pay

13 screens

A full redesign of the app and of internet banking, now live, with the same home screen tested across twelve brand palettes, light and dark.

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How far the ad reaches

The creative first

Offer, dates and budget

Rejected, with the reason

Today's performance

Directo · Local Ads

7 screens

Radius-based ads for the corner store, with a prepaid balance. From flow to an app running in the simulator in four days.

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Thirteen templates, 39 combinations

The seven meeting decisions

All 39 combinations, drawn

Showcase card

Coupon card, no photo

Directo · TicTac

18 screens

Thirteen card templates, 39 combinations, not one new measurement. The bottleneck was never the card, it was the cost of the photo.

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A tela inicial, a rolagem inteira

A missão aberta

Reservada, com prazo

Revisar e enviar

Seus vínculos

Directo · Creator

15 screens

The feed only has offers if somebody produces the offer inside the store. This is that person's app, and the model that decides on whose behalf they publish.

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Websites and systems · design and code

Lara Cozinha, payment from the cart

The cake drawn as it is built

Search starts from the occasion

The cart

Pix or card, through InfinitePay

Websites with admin and payments

11 screens

A cake shop, a religious community house and a folk dance group, in Campinas. Payment by Pix or card happens inside the site, and a paid order lands in the panel on its own.

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Or read them here

Design systems

Digital product

Websites and systems · design and code

092payments built into the siteWebsites with admin and paymentsWebsites and systems · design and codeA cake shop, a religious community house and a folk dance group, in Campinas. Payment by Pix or card happens inside the site, and a paid order lands in the panel on its own.

design systems✦
product design✦
fintech✦
ai in the process✦
multi-brand✦
accessibility✦
research✦