I worked on enhancing and maintaining the backend systems at PayPal, focusing on legacy code and fixing production bugs.

Updated Feature Flags: Patched/Fixed/Replaced legacy feature flags & related code to improve system stability.

Fixing Long Delays in Report Generation: Solved an issue with the Merchant control panel. Where reports would take too long to compile and often crashed.

Fixed an issue with Orphan Records: Solved a problem with PaymentMethod Records missing their Parent Customers records and Also added tests to simulate Race conditions that led to these orphan records.

I addressed and patched outdated feature flags and their associated code. This involved making necessary updates and fixes to ensure that the feature flags worked as intended, enhancing the stability and functionality of the control panel.

I modified the code to resolve issues with report generation in the control panel dashboard. This included optimizing the code that handled large datasets (over 40,000 records), and improving performance in data processing.

Solved a problem with PaymentMethod Records missing their Parent Customers records when the PaymentMethod records where manipulated. I also added tests to simulate Race conditions that led to these orphan records.