Prior experience of 1 year with python, python classes and decorators is a must.
Familiarity with web frameworks like Django or Flask.
Comfortable using schema-less datastores like MongoDB and redis.
Familiarity with a distributed task processing system like Celery or Kafka is an added point too.
You should be familiar with distributed version control systems like git.
Strong understanding of Internet/web, scalable and high-performance web-based systems and web-related technologies.
Experience with AWS / Google Compute Engine / Azure Cloud will be a plus.