Open to opportunities

Alejandro Aguero

@alejandroaguero

Android engineer at Stakwork / Sphinx who delivered production Android and Windows clients for an encrypted Lightning Network chat platform.

Argentina

Message

At Stakwork / Sphinx, I was responsible for the Android and Windows clients of a real-time, end-to-end encrypted chat platform built on the Lightning Network. I implemented the Android migration layer connecting Rust bindings, MQTT transport, secure key flows, payments, and core model objects.

I developed shared Kotlin Multiplatform architecture and offline-first encrypted persistence for chat history and media. I also built and published DolarCambio, an Android app for tracking Argentina dollar exchange rates.

Experience

Work history, roles, and key accomplishments

Software Engineer, Android & Windows Clients

Stakwork / Sphinx

Apr 2022 - Mar 2026 (3 years 11 months)

Sole engineer responsible for the Android and Windows clients of Sphinx, a real-time, end-to-end encrypted chat platform built on the Lightning Network. Owned client-side feature delivery, debugging, stability, and weekly production releases for 4 years.

Kotlin Jetpack Compose MVVM MVI Clean Architecture SQLDelight SQLCipher MQTT Rust Multiplatform Dependency Injection Hilt Dagger Gradle CI CD

Android Developer

Freelance / Self-Employed

Jul 2020 - Mar 2022 (1 year 8 months)

Built Android applications and technical tools with maintainable architecture, clear workflows, and practical debugging across the implementation cycle. Strengthened Kotlin, Java, Android SDK, Gradle, UI architecture, persistence, networking, and backend integration fundamentals.

Kotlin Java Android SDK Gradle UI Architecture Persistence Networking Backend Integrations

Professional Musician

Carnival Cruise Line

May 2016 - Nov 2021 (5 years 6 months)

Performed in a high-pressure international environment for 5+ years, developing discipline, reliability, collaboration, and live problem-solving habits later applied to software delivery.

Education

Degrees, certifications, and relevant coursework

Conservatorio de Música de Bahía Blanca

Music Teacher, Music

2009 - 2016

Completed formal music education before transitioning into software engineering, bringing structured practice, discipline, and systems thinking from professional music into technology.