A while back, I was working on building a tax engine system, one that connects accountants and household businesses to help them declare taxes. Near the end of the development cycle, we received feedback from our own accountants’ team. We hadn’t rolled out to external accountants yet; the project was still in its testing-the-waters phase. The request came from the Business Analyst at the time:

“The users cannot export data from our system, so we will need to build an export feature for them.”

When an order is short on stock at a warehouse, the system creates an internal transfer request to move inventory from another location. The existing flow publishes one Kafka message per order, which triggers one transfer request per order.

During peak hours, a single warehouse can generate hundreds of these messages in minutes. Each one spawns a small transfer note. The warehouse team ends up processing dozens of tiny requests for the same destination when a single consolidated batch would do.