Python Developer for System Upgrade

I'm seeking an experienced developer to help upgrade and scale my system, with a focus on enhancing security.

Key Requirements:
- Strong Python skills
- Experience with Django and FastAPI
- Familiarity with automation and APScheduler
- Knowledge of how Instagram works

Ideal Skills & Experience:
- Proven track record in backend services and API security
- Experience in system scaling and database management
- Ability to identify and address security vulnerabilities

Please provide examples of similar work done and your approach to improving system security.