Python Data System Deployment Fixes

I’ve finished building a web-based data management system and now I’m ready to push it live. Before the launch I’d like a fresh set of eyes on the code to knock out a few lingering bugs and squeeze out some extra performance, then handle the full deployment.
An experienced Python Backend Developer to work on an existing web-based management system.
The frontend is already developed, and the role is focused entirely on backend development, database integration, and system maintenance.

Scope of Work
Develop, maintain, and enhance backend services in Python
Connect and manage databases for an existing frontend
Implement APIs to support frontend functionality
Maintain existing backend logic and improve system performance
Handle user authentication, roles, permissions, and activity tracking
Manage data storage, validation, and business logic
Debug, optimize, and scale the backend system
Technical Requirements
Strong expertise in Python
Experience with Django / Flask / FastAPI
Strong database experience (PostgreSQL / MySQL)
API development (REST APIs)
Database design, queries, indexing, and optimization
Experience working with existing systems (maintenance + upgrades)
Understanding of security best practices
Preferred / Nice to Have
Experience with large-scale or data-heavy systems
Knowledge of background jobs / task queues (Celery, RQ)
Experience with Docker, Linux servers, or cloud deployment
Experience in logistics, shipping, or management systems