55onze
55onze / independent studioFrontend × Design

São Paulo, Brazil

We build softwarewhere engineeringmeets design.

Independent software studio focused on frontend engineering, UX/UI and Design Systems.

São Paulo, Brazil

01 / Product

Design System Assurance

Elira

Everything your Design System knows, in one place.

Analyze Design System foundations, surface findings and turn evidence into clear health reports.

Elira workspace showing a Design System Health Report, health score and evidence coverage
Elira / Design System Health Report
Explore project
Status
In development

02 / Product

Browser Extension

Visqora

See beyond the surface.

Inspect visual properties and compare computed CSS across elements, pages and tabs.

Visqora workspace comparing computed CSS properties across elements from different pages
Visqora / Cross-page comparison
Visit website
Pricing
Free
Status
Coming soon to Chrome Web Store

03 / Project

Open Source Library

Demetria

Schema-driven forms for any JavaScript application.

Generate native multi-step HTML forms from JSON-compatible schemas, with validation and optional cross-page state persistence.

Working Demetria onboarding form showing two steps, required and optional fields, fictional values and a Next button
Demetria / Single-page onboarding example
Version
v0.1.1
Status
Available on npm
Technologies
TypeScript / Vanilla JavaScript / Native HTML

04 / What We Know

We work where frontend systems, interfaces and design decisions meet.

  1. Frontend Engineering01

    Architecture, interfaces and systems built to evolve.

  2. Design Systems02

    Connecting design decisions, implementation and shared language.

  3. UX / UI03

    Making complex systems understandable and usable.

  4. Design Engineering04

    Where visual decisions become reliable interfaces.

  5. Developer Experience05

    Reducing friction for the people building the product.

05 / Knowledge

We build.We learn.We share.

We document what we learn while building products, systems and interfaces.

Read notes
  • 01 / Frontend Engineering
  • 02 / Design Systems
  • 03 / Design Engineering
  • 04 / Developer Experience

06 / Studio

Small by design.Deep by choice.

55onze is an independent software studio from São Paulo. We build our own products around frontend engineering and design, share what we learn, and selectively advise teams on improving their own systems.

How we work

Products
Primary
Knowledge
Shared
Advisory
Selective

Our name carries our coordinates.

+55 / Brazil11 / São Paulo

Founded by Gustavo A Roberto.