2+ years of hands on experience with PHP/Node.js/Go/Python.
Having built scalable backends using any two of these would be preferable.
You should be able to write modular, extensible, readable, and performant code
You should be able to choose the right Data Structures, tools, and tech stacks and be able to do High-Level Designing with guidance
You should have worked with Relational databases like MySQL, Postgres and understand partitioning, sharding, as well as NoSQL databases such as MongoDB/Couchbase, etc.
You should have worked with web servers like Nginx, caching servers like Redis/Memcached, queueing sysems like Kafka etc
Experience in working in agile software development environments
Prior experience with Google cloud platform would be preferable,