About

I'm Ian Nery Bandeira, a senior product engineer based in Brasília. My background is React Native app development, usability, research and education.

I'm a proactive problem solver who is always eager to learn and grow, and I like making a positive impact on the teams and projects I work with.

Experience

  1. Nov 2025 – present

    Character.AI

    Senior Product Engineer

    Full-stack and mobile product engineering on growth features and monetization infrastructure, at ~15.5M monthly active users.

    • Launched the CAI+ onboarding upsell: ~$130k more monthly subscription revenue (+17% gross).
    • Led the Following tab: +17.61% following activity, +3.16% active subscribers.
    • Shipped Recent Chat Tabs, block/unblock, Character Boost and Preset Wallpapers.
    • Overhauled keyboard avoidance across the company into a single unified system.
    • Cut CI build times ~57% (cold) and ~82% (warm); CodeQL runtime down 61%.

  2. Oct 2023 – Oct 2025

    Techsquads

    Senior Software Engineer · Technical Lead

    Led prototyping, development and deployment of client apps, working directly with clients.

    • Built SoviHealth – Smart Diary from scratch (React Native, Node.js, Firebase, GCP).
    • Directed the Next.js SoviHealth web dashboard over three months.
    • Built and coordinated AegisApp with a team of five: 200+ downloads in two weeks.

  3. May 2023 – Dec 2023 · Brazil

    Qintess

    Senior Software Engineer

    Co-coordinated a team of six and led an app for artisans in socially vulnerable situations.

    • Ran client meetings in English: requirements, team questions and sprint feedback.
    • React Native, Expo, EAS, TypeScript and Firebase.

  4. Apr 2022 – May 2023 · Brasília

    Flow Tecnologias Empáticas

    Software Developer → Senior Software Engineer

    Integrating psychophysiological data into development environments, and building two React Native apps.

    • Coordinated developers and a machine learning researcher on product integration and architecture.
    • Part of a team of eight building Moodmind and Playtestr.

  5. Feb 2020 – May 2023 · Brasília

    University of Brasília

    Researcher & Software Engineer · Assistant Teacher

    Research apps, an MSc on wearable psychophysiological data in games, and teaching.

    • Built an app for automatic prescription signatures in the Brazilian health system.
    • Built Trilha da Arquitetura e Arte, exploring the campus's buildings and artworks.
    • Assistant and substitute teacher for Algorithms and Computer Programming; coordinated tutoring for ~350 students a semester.

  6. Feb 2019 – Mar 2022 · Brazil

    Finatec / CNJ

    Front-End Developer

    Mobile developer on a team of 18 building ESVirtual, an app for former inmates.

    • Owned the API integration and iOS layout work.
    • Integrated the app with SEEU, the Unified Electronic Execution System.

Education

  • MSc, Computer Science

    University of Brasília · 2020 – 2022

  • BSc, Computer Science (Game Analytics)

    University of Brasília · 2017 – 2020

Languages

  • Portuguese (native)
  • English (native or bilingual, EF SET C2)
  • Spanish (full professional)

Get in touch

Email iannerybandeira@gmail.com · LinkedIn · Résumé