We have Python Django application, Postgres DB, Django REST API framework, Django Admin app (AngularJS, Bootstrap), push notifications through GCM, scheduled emails, and other running services.
Currently it's Ubuntu VPS hosted by Digital ocean.
Clients are network of Android devices.
Performance issues are related to REST API requests, DB performance, and Django Admin.
See the attached screenshot.
We may consider to move all or some services to more scalable and reliable infrastructure, like Google Cloud Infrastructure. We may consider to replace DB technology if this will help.
You will work closely with our Python developer.
You better to speak Russian, but not necessary.
Absolutely, no India, please. No agencies.