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John Phamvan

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John Phamvan at DDD Europe 2025DDD Europe 20252025-06-02
A cross functional team modernizes parts of the US health‑care claims system that processes 4 million claims per night and runs on three million lines of…
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John Phamvan at DDD Europe 2025DDD Europe 20252025-06-02
Domain-Driven Design creates a shared understanding via ubiquitous language and drives decomposition of a government agency monolith into…
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DDD Surrounded by Legacy, Govt EditionDDD Europe 20252025-06-02
A cross-functional team prototypes a cloud adjudication path that processes four million claims per night without touching the legacy core of three million…
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5 Secrets We Learned While Building a Bank in 16 MonthsRailsConf 20152015-04-21
Claims a full banking stack gets built and launched in 16 months after an 8-week Ruby rewrite of a 500k-line C# app, using Rails, PostgreSQL, Redis and…
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