comra.dev
Currently @ Asana Rebel · Berlin

Web engineer · est. 2002

Rubens Stulzer

Twenty-something years building for the web. I work mostly in Ruby on Rails and React with TypeScript — the long, boring kind of expertise that only comes from shipping.

Berlin-based. Brazilian by birth. Also a comrade.

Based in
Berlin · DE
Years
24+
Stack
Rails · React
Status
Shipping
Portrait of Rubens Stulzer
fig. 01 Berlin · 2026
§ 02
10 entries · 2022–2026

Trajectory.

A reverse-chronological notebook of the places, the people, and the stacks. Some of it shipped, all of it taught.

  1. 2022 — Present

    Asana Rebel

    Berlin, Germany

    Building the marketing automation that orchestrates ad creatives and spend across channels. Shipping experiments that move activation and conversion.

    • Ruby on Rails
    • React
    • TypeScript
    • Tailwind CSS
  2. 2020 — 2022

    samedi GmbH

    Berlin, Germany

    Kept a healthcare Rails monolith healthy and shipped React apps for COVID-19 vaccination bookings. End-to-end encryption to keep patient data private.

    • Ruby on Rails
    • TypeScript
    • CSS
  3. 2018 — 2020

    Asana Rebel

    Berlin, Germany

    Shipped onboarding, funnel, and checkout features for the flagship fitness app. Wrangled cross-platform subscription logic across iOS, Android, and web.

    • Ruby on Rails
    • JavaScript
    • Sass
  4. 2017 — 2018

    AroundHome

    Berlin, Germany

    Built an appointments platform from scratch to schedule the home-service leads the business sells. Designed for thousands of contractors managing live calendars.

    • Angular
    • JavaScript
    • Ruby on Rails
    • CSS
  5. 2015 — 2017

    VivaReal

    São Paulo, Brazil

    Drove web-to-mobile conversion campaigns with measurable lift. Then built the CRM that real-estate agents and brokerages use to manage their pipeline.

    • Ruby on Rails
    • JavaScript
    • CSS
  6. 2014 — 2015

    Logovia

    São Paulo, Brazil

    Built a design system from scratch and shipped the features around it. Full stack, heavy on the front end.

    • Ruby on Rails
    • EmberJS
    • CSS
  7. 2012 — 2014

    Hello Innovation

    Detroit MI, USA

    Built creativity and productivity apps end-to-end. Backend and front end, mostly solo.

    • Ruby on Rails
    • JavaScript
    • CSS
  8. 2006 — 2012

    Freelancer

    Brazil, Remote

    Six years on my own: websites, apps, and graphic design for clients around the world. Flash and Rails in equal measure, with a side of sysadmin duty.

    • Ruby on Rails
    • Flash
    • Photoshop
    • Illustrator
  9. 2002 — 2004

    Trace Design

    Valinhos, Brazil

    Designed in Photoshop and Illustrator, then sliced and coded the layouts in Dreamweaver. The original ‘design + code’ role.

    • Web Design
    • Flash
  10. Origin

    before the timeline, a kid with a modem and too much time.