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jmuci/README.md

José M. Mucientes Fayos

Senior / Staff-level Android + Backend Product Engineer | 13+ years of experience | Colorado, USA Kotlin everywhere. Systems thinker. Zero-to-one builder.

I build products end-to-end — from Android UI to backend services — with a strong bias toward experimentation, iteration, and measurable impact.


What I Do

  • 📱 Android (Kotlin, Compose, Coroutines, Flow, Hilt)

  • ⚙️ Backend (Ktor, JWT auth, Postgres, Exposed ORM, Docker, Microservices, K8s)

  • 🔄 API design & client-server contract modeling

  • 📊 Product experimentation & behavioral metrics

  • 🧠 Systems thinking with a product-first mindset

I’ve spent over a decade building high-scale consumer and creator tools, most recently working across Android and backend systems to ship features that moved engagement, retention, and revenue.

Github Activity

github contribution grid snake animation

How I Think

  • Build fast, but protect irreversible decisions.

  • Optimize for learning velocity in early-stage products.

  • Instrument everything.

  • Design for extensibility, not overengineering.

  • Tie technical decisions directly to business impact.

I’m especially interested in:

  • Commerce systems

  • Pricing & payments infrastructure

  • AI-augmented developer workflows

  • Product-led growth loops


Currently

  • Building side projects with Kotlin + AI-assisted workflows

  • Exploring agentic systems and commerce automation

  • Open to interesting zero-to-one product challenges


Tech Stack

Mobile
Kotlin • Jetpack Compose • MVVM • Clean Architecture • Room • Retrofit • Coil

Backend
Ktor • REST APIs • PostgreSQL • Exposed • Docker • Kotlin • Java • K8s

Tooling & Process
Experimentation frameworks • A/B testing • Feature flags • CI/CD


If you want to build something ambitious, pragmatic, and user-centered — let’s talk.

Popular repositories Loading

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    Chef AI is an app that makes it easy to create weekly meal plans and export them to your fav grocery shop for delivery or pickup. The app will also support creating a menu based on a specific diet.

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  3. Chef.ai_Backend Chef.ai_Backend Public

    Backend service powering the Chef AI app. Written in Kotlin using Ktor.

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    AI Context files for AI agents to drop in your Android Project.

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    vim, emax, zsh, tmux, some wms, and misc configurations

    Emacs Lisp