It's not that you don't write anything in a new thing. It's that you start with small, less critical projects. Get your feet wet, give people a chance to get a feel for the pros and cons, that sort of thing.
Jumping right into writing "mission critical services" in the brand new language that few people at the company know well is asking for trouble.
there were no problems of scale, speed or latency. It was migrating from one terrible system to something that should be smaller, simpler, cheaper and easier to run.
The API is/was supposed to do precisely four things:
o provide an authentication flow for customers
0 provide an authentication flow for enterprises to allow SSO
o handle payment info
o count the number of articles read for billing/freemium/premium
That is all. Its a solved problem. Don't innovate, do.
Spend the time instead innovating on the bits that are useful to the business and provide an edge: CRM, pattern recognition and data analytics.
