Today was the day my financial SaaS stopped being a toy. For Day 67, I replaced my simulated Plaid data with a live connection to the Wise API.
The Challenge:
Mock data is clean and predictable. Live data is messy. When I updated my Lambda orchestrator to pull real EUR transactions, I immediately hit issues with data duplication in my DynamoDB tables and aggressive caching from my React frontend.
The Debugging Process:
When the UI wouldn't update, I had to drop down to the browser console. I wrote a quick script to extract my JWT token from localStorage and fired a direct fetch request to my Lambda URL, appending ?sync=true to force a fresh pull from Wise.
Seeing that { "status": "success" } response and the array of 100 real transactions log into the console was the highlight of the week.
Next up: refining the multi-tenant routing so I can seamlessly switch between simulated demo users and live production accounts.
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