Ability to take a high-level problem: design from scratch, build, integrate, test, deploy

Ability to understand and substantially modify someone else's code

Strength with python

Strength with golang

If not golang, strength with other compiled language e.g. C# of Java

Strong computer science fundamentals e.g. with data structures, sorts, search algorithms

Experience with optimizing for run-time code - low latency, high throughput, scalability

Comfortable triaging and supporting production code.