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Mobile Engineer — Buenos Aires, remote worldwide

From the first commit to the one nobody thought would ship again.

Five+ years building mobile products in React Native and Kotlin — some from a blank screen, some inherited mid-crisis. I built El Puma Contigo from scratch with an AI-assisted workflow baked in from day one. I took over Techint's internal app after a year with no releases and shipped three in three months. Same instincts either way: tests before changes, structure before features, and enough client communication that the roadmap stays honest.

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03
Releases in 3 months
after a year with no updates
1,100+
Automated tests
built from zero coverage
166
Files migrated JS→TS
zero functional regressions
10,000+
Active users
maintained on PassApp

How I work

  1. 01

    Starting from zero

    El Puma Contigo, Machine Stock, a handful of personal apps — built from a blank screen, with the architecture and an AI-assisted workflow decided from day one, working directly with whoever's paying for it to keep the roadmap honest.

  2. 02

    Starting from someone else's mess

    Techint's internal app, PassApp, Be Soul — codebases with years of decisions already baked in, sometimes no tests at all. Same method: understand what's there before touching it, build the safety net, then change what needs changing.

Either way, I document as I go and build the kind of test coverage that makes AI-assisted changes safe instead of risky — which is also how I ended up leading the first AI agent shipped inside a real product, not the kind you just use to write one.

Before mobile engineering, I studied Audiovisual Design at the University of Buenos Aires — it's part of why this page looks the way it does.

Portrait of Fernando Pailhe

Projects

EQM

Techint

Stabilized a business-critical, offline-first internal app: 3 releases in 3 months, a full TypeScript migration, and the first AI agent shipped inside the product.

liveReact Native TypeScript

Tune-Up

Personal

Personal React Native app that turns workout tracking into actionable weekly summaries: users see progress across sessions without manually comparing spreadsheets.

in-progressReact Native Expo TypeScript

HangApp

Freelance

Took a beta MVP to a production-ready public release, with a complete UI/UX redesign and architecture overhaul.

liveReact Native Expo TypeScript

Be Soul

Sitio Uno

Led the re-architecture of a digital-legacy and in-memorial app around Redux and SOLID principles for long-term scalability.

liveReact Native TypeScript Redux

PassApp

Freelance

Android app maintained and extended for 10,000+ active users, delivering consistent feature updates over several years.

liveKotlin MVP architecture

El Puma Contigo

Sitio Uno

Built from scratch with a continuous-integration workflow on Expo, integrating AI functionality to enhance user interaction.

liveReact Native Expo

Let's talk.

Open to remote roles in mobile engineering — especially the messy, business-critical stabilization work nobody else wants to touch.

ferpai@gmail.com