Writing, product thinking, and system design.
A growing collection of product articles and technical writing by Sapphire Haeward, focused on full-stack software engineering, solo development, real-world product decisions, and system architecture.
Building Selfee — By Sapphire Haeward
Why I built Selfee as a social marketplace, why I chose React Native, why I migrated from Appwrite to Supabase, and how I designed the product around value, trust, and monetization.
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Building Allure — By Sapphire Haeward
A look at how I designed Allure around safer online dating, flexible discovery, real-time chat, Safe Mode, events, gifts, and more intentional connection.
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What I Learned About Cryptography as a Math Major
A simple explanation of how encryption works, why prime numbers matter, and what I learned studying cryptography as a mathematics major.
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How Mathematics Shows Up in Software Engineering (More Than You Think)
How math appears in real systems, including location logic, structured thinking, and the Haversine distance formula used to connect nearby users.
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