Work → Xenia
Xenia
Performance optimization and billing infrastructure for a B2B operations SaaS.
3,000+
Active organizations supported without performance degradation
$100k+
MRR automated through Stripe billing infrastructure
<7s
Load time — down from 30+ seconds for large accounts
Xenia's app took 30+ seconds to load for large accounts. The core checklist feature crashed browsers when lists exceeded 40 items. The company had no automated billing and was processing subscriptions manually.
Implemented React virtualization (windowing) on the checklist module so only visible items render in the DOM. Refactored state management to eliminate re-render cascades. Owned the complete Stripe billing integration — free trials, per-seat pricing, webhooks, and failed payment handling.
React virtualization
Checklists with 1,000+ items now render at 60fps — only visible items exist in the DOM.
Stripe billing engine
Free trials, monthly/yearly plans, per-seat pricing, and webhook handlers for renewals and failures.
Multi-tenant data isolation
Refactored data access layer to enforce strict separation across 3,000+ company accounts.
State management refactor
Eliminated prop-drilling re-renders that were causing cascading UI freezes.
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Available for new projects · Based in Pakistan · Serving US clients
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