Blog
Thoughts on engineering, design, and building great products.
From Messy Bank Statements to AI Insights in 48h: An AWS-Native AI Money Coach System Design
The real-world AWS architecture story behind BudgetBot, an AI Money Coach for Vietnamese users: upload a statement or payment screenshot and the AI auto-classifies transactions, computes budgets, and advises spending. Async pipeline, 4-level deduplication, ~$30/month cost optimization, and financial-data security.
What's New in AWS: a re:Invent 2025 → Early 2026 Recap
The opening edition of a recurring AWS digest, catching up on six months from re:Invent 2025 to early 2026. The features worth your attention: Lambda Durable Functions, EKS Capabilities (managed Argo CD), DynamoDB multi-Region strong consistency, Bedrock's 18 new open-weight models, S3 Vectors, Security Hub GA, plus the list of services being retired. Every item is grounded in the AWS docs; whatever can be demoed is run for real, then cleaned up.