About

Twenty years of product, in three periods.

Enterprise at scale, AI product, and a SaaS I run on my own. The method is the same in all three.

How I work

Product design

  • Triple Diamond, from the problem to what actually shipped
  • Discovery with the people who use it, not the people with opinions
  • Information architecture and flow before pixels
  • Design system with tokens, dark mode and mobile first
  • WCAG accessibility as a requirement, not a final touch up
  • Metrics agreed before shipping, not after

Applied AI

  • Agents with explicit permission, cost and limits
  • Semantic search and conversational interfaces
  • MCP and a tool surface for third party AI
  • Guardrails, audit trail and a per conversation off switch
  • Evaluating what the model answered, rather than trusting it
  • AI in research: synthesis, transcripts and hypothesis pressure testing

Shipping

  • Next.js, TypeScript, Postgres with RLS, multi-tenant
  • An interactive prototype with a real database when the decision is expensive
  • A design system living inside an agentic development machine
  • Versioned migrations, CI and a deploy window
  • SQL against the product's database as a research source

The path

  1. 2005 to 2015

    From craft to leadership

    I started drawing screens and ended up leading product. I learned early that good design is what sells, not what decorates.

  2. CVC Corp

    Online to store, awarded in 2013

    I led an online to store project across a network of more than a thousand stores. It became the company's innovation case and won the ABEMD Gold.

  3. Natura & Co

    Product for millions

    The checkout of a platform used by 1.2 million sales consultants, with close to US$ 2M per week in revenue uplift.

  4. Porto

    Product in a regulated domain

    A health app for more than 2 million people. I learned to defend a design decision with data, because there a mistake has consequences.

  5. Triggo.ai

    AI became product, not a promise

    A no-code AI platform, semantic search and clinical chat. This is where I started designing what happens when the model is slow and when it is wrong.

  6. Localhub

    Now, end to end

    I take all of that and point it at the largest forgotten market in Brazil. I design it, I code it, I ship it and I show the work in public.

People who built with me

Reinner is excellent to work with. Curious and resilient, always focused on solutions that challenge the status quo. Together we created a very successful online to store case for a company that was 100% offline, with more than a thousand stores.
Marcio Borges MaltaCEO · Board Member (IBGC) · Co-Founder
Reinner has a restless mind, ahead of its time, always tuned to current trends. He understands the business deeply and solves with both technique and vision.
Fabio MoriCDO · CMO · CPO · Endeavor Mentor
Creativity and the ability to adapt projects to the budget are Reinner's trademarks. We delivered important projects at almost zero cost.
Rogério MendesSales Director · Channels
Reinner is one of those people who genuinely love what they do. With absurd creativity, he adds enormous value wherever he goes.
Márcio RosaFounder & CEO (P4F, Pay2B) · Angel investor

Resume

Targeted at a product designer role focused on AI. Two pages, in Portuguese and English.