Inventrix — inventory and delivery backend

Inventory and business management for companies that stock, sell and deliver goods: warehouses, products, invoices, company debts and a delivery flow for drivers, with a Telegram bot and Mini App on the driver side.

• Main backend contributor on a two-person team — 143 of 170 commits (Oct 2025 – May 2026).
• Delivery API with drf-spectacular schemas, plus a real-time WebSocket stream of invoice assignments for drivers.
• Telegram driver workflow with payment approval controls.
• Company debt repayment with an auditable history, settled in-flow from product operations.
• Owner dashboard with currency-aware analytics.
• Invite flow, active-warehouse switching per user, and a pagination envelope on every list endpoint.
• End-to-end tests that walk the full business chain with strict assertions.

• Django + DRF with django-bolt on the hot path, served by Gunicorn in Docker.
• PostgreSQL with PostGIS (drf-gis); Redis; Celery with celery-beat for scheduled work.
• django-simple-history for the audit trail, django-import-export for bulk data, Unfold for the admin.

• One response envelope for every list endpoint, so the frontend and bot clients paginate the same way.
• Audit history on the money-moving models, so debt balances can be reconstructed.