Polosys Books
Making a multi-tenant SaaS ERP dramatically faster
Polosys Books is a multi-tenant SaaS ERP serving the GCC and Saudi Arabia market. I joined on contract and rebuilt the slow transaction paths that were holding up daily accounting work.
Open Polosys Books
What I built
- Cut VendorCredit transaction processing by about 99% on AWS Lambda and RDS by rebuilding the service layer with bulk database operations and a custom incremental FIFO engine.
- Reduced PurchaseInvoice processing from up to 60 seconds to 1-2 seconds using the same architecture.
- Fixed 14 interconnected bugs across 5 files in the Delivery Challan module through systematic root-cause analysis.
- Added multi-unit quantity conversion, so items sell in one unit while inventory tracks in another.
- Audited 579 files across 27 Django apps and documented 21 architectural issues for the technical lead.
- Wrote the platform's technical documentation site in Docusaurus, covering 13 business modules and the API reference.