R. Eiki // live

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RafaelEiki

I'm an engineer and founder. I take ideas from first sketch to shipped product — with the technical depth to build them and the ownership to see them through.

  • Full-Stack Software Engineer
  • Entrepreneur
  • EdTech Researcher

Spec sheet

10+
years building software
20+
awards across science fairs
4
peer-reviewed papers
1
startup co-founded

Selected work

06 entries

Senior Software Engineer

Lift Ventures Jan 2022 – Present

Engineering

Full-stack, shipping Ruby on Rails and React.
Ruby on RailsReact

Software Engineer III

QuintoAndar Apr 2021 – Dec 2021

Engineering

Java (Spring, Hibernate) and React on a scaled marketplace.
JavaSpringReact

Co-founder

Vivros Jan 2018 – Mar 2021

Founding

Co-founded an interactive-books startup; led the business and built the site (Rails, React) and the Android app (Java, Kotlin).
Ruby on RailsReactAndroid

Software Engineer Intern

Microsoft Dec 2018 – Mar 2019

Engineering

Built a partner-facing feature for Dynamics 365 in C#.
C#.NET

EdTech Business Mentor

Instituto Claro Oct 2022 – Present

Founding

Mentor EdTech startups in the Campus Mobile entrepreneurship program.
MentorshipEdTech

Jr. Full-Stack Developer

PlayKids (Movile) Nov 2015 – Jun 2016

Engineering

Built the CMS for an app with 6M monthly users; Rails, jQuery, Spring.
Ruby on RailsjQuerySpring

Companies I worked with

06 marks
  • Lift Ventures
  • QuintoAndar
  • Vivros
  • Microsoft
  • Instituto Claro
  • PlayKids

Research

Alongside engineering, I research how people and technology couple — human-computer interaction for education.

Advised by M. Cecília C. Baranauskas, a global reference in HCI.

Best Undergraduate Research 2018 — UNICAMP Computing Institute.

  • A framework for socio-enactive educational systemsIHC ’19
  • Reading as a Collaborative ConstructionEducational Informatics ’18
  • Collaborative reading with augmented realitySBIE ’18
  • Sistemas socioenativos para leitura colaborativa: construção técnica, pedagógica e de designWTD IC Unicamp ’18

Ownership

coord 01

DevY

Creator & coordinator — mentored 12 young-researcher projects → 20 awards.

coord 02

Vivros

Co-founder of an interactive-books startup.

coord 03

FEBRACE / FBJC

Organizer and reviewer at national science fairs.