Senior Android Engineer
Jorge Casariego
10+ years building Android and mobile products, including large-scale fintech and payments experiences.
I write about Android engineering, architecture, and practical AI-assisted engineering through Mobile Coding Academy.
Selected Experience
Over the last decade, I've worked on Android products across fintech, media, and consumer applications. Most recently, I worked on large-scale payments experiences at PayPal.
Open Source
I've also contributed to open-source Android projects, including WordPress for Android and Wikipedia for Android.
Focus Areas
Android Architecture
Designing maintainable state, data, navigation, and UI flows for complex mobile products.
Concurrency & Reactive Systems
Coroutines, Flow, state ownership, synchronization, and predictable asynchronous UI behavior.
Fintech & Mobile Security
Payments, sensitive data, authentication, cryptographic keys, reliability, and secure mobile engineering.
AI-Assisted Engineering
Exploring where AI improves real software engineering workflows — and where engineering judgment, validation, and verification still matter.
Writing & Teaching
I write and create videos about the engineering ideas behind production mobile apps — architecture, Compose, concurrency, security, performance, and AI-assisted engineering — through Mobile Coding Academy.
Latest Writing
- The First 15 Minutes: How Senior Engineers Turn Ambiguity Into a Plan
- Before You Write Code: How Senior Mobile Engineers Approach an Ambiguous Build Exercise
- Where Should an Android App Store a Private Key?
Substack — long-form technical writing.
YouTube — technical videos and visual explanations.