Senior Product Engineering Case Studies

How I turn ambiguous product ideas into shipped systems.

A focused set of case studies for technical leaders who want to see product judgment, architecture decisions, tradeoffs, and real execution across mobile, AI, B2B workflows, and independent product systems.

Scale-up production work Production scale-up experience

Burger King Mobile App at Scale

Outcome Proof of production judgment in mobile ordering flows across USA, Europe, and Canada.

Mobile product work inside a real ordering business, where reliability, regional complexity, and team execution matter.

React NativeOrderingFrontend ArchitectureScale-up
Production mobile appUSA, Europe, and Canada scopeFrontend stabilization
Read case study ->
AI learning product Experimental product

Flowtranslate AI Learning System

Outcome Turns daily translation moments into saved learning material, quota-aware AI work, and study paths.

A translation-first PWA that turns everyday translation history into personalized language learning.

AI UXLanguage LearningPWASupabase
Bidirectional translation flowLearning from historyQuota-aware AI usage
Read case study ->
B2B workflow product Active Entity Builders product

Tablia Restaurant Menu AI Workflow

Outcome Compresses restaurant setup from messy menu input into review, publish, guest assistant, and analytics loops.

A B2B tool that turns messy restaurant menus into a live QR experience, an AI guest assistant, and owner analytics.

B2B SaaSAI ParsingQR MenusAnalytics
AI menu importHuman review workflowPublic QR landing page
Read case study ->
Independent operating system Active product engineering system

Entity Builders Product Engineering System

Outcome Shows how one solo builder compounds product memory, reusable code, and AI-assisted delivery across apps.

A monorepo and spec-driven workflow for validating multiple products without rebuilding the same foundations every time.

MonorepoProduct OpsOpenSpecAI-assisted Delivery
Yarn workspace monorepoShared platform rulesOpenSpec product memory
Read case study ->
What to look for

Not just what shipped. How the decisions were made.

These are written for Engineering Managers, CTOs, and technical founders: the people who need someone comfortable with ambiguity, product context, and the unglamorous details that make systems survive contact with users.

JO
Product Engineering AssistantJuan's work, systems, and fit

Hey! Ask me about Juan's case studies, product engineering work, AI/mobile systems, or collaboration fit.