Felipe Pastana Engineering Journal

Engineering reliable systems, and writing the lessons behind them.

I'm Felipe Pastana, a Software Engineer and Software Architect in Canada with 15+ years building scalable SaaS platforms, enterprise systems, resilient APIs, and distributed backend services.

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What I write about

Backend architecture for scalable SaaS and enterprise systems.
Reliable APIs, distributed services, and AWS cloud infrastructure.
Maintainability, code quality, engineering process, and my cybersecurity learning journey.

Recent writing from the engineering journal

Architecture breakdowns, backend patterns, and notes from my ongoing cybersecurity journey.

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Ai Agents Vs Skills Ai Workflows Ai For Developers

March 31, 2026 · 3 min read

Are AI Agents Becoming Obsolete? Why Skills Are the Future of AI Workflows

AI agents vs AI skills: understand the shift from prompt engineering to structured AI workflows. Learn how reusable AI skills improve automation, developer productivity, and scalability in modern AI systems.

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Engineering Tools Frost Protection Civil Engineering Geotechnical Engineering Unit Converter Engineering Software Foundation Design Cold Climate Engineering Canada Engineering Us Engineering Saa S

March 30, 2026 · 1 min read

New Features in Unit Toolbox: Subscription System & Frost Protection Tool

Unit Toolbox now includes a subscription system (free during beta) and a new frost protection assessment tool for engineers in North America, with TXT and PDF export capabilities.

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Unit Conversion Engineering Tools Metric Conversion Imperial Units

March 22, 2026 · 1 min read

Introducing UnitToolbox – A Practical Unit Conversion Tool for Engineers

UnitToolbox is a fast, practical unit conversion tool built for engineers who need accurate metric and imperial conversions without interrupting their workflow.

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