Tip 1 : As it is a fintech product based company you should know the Java concept in depth
Tip 2 : Node is also a well known technology and they are also using this so we should know the basic concept of this
Tip 3 : please be prepared with Algo and API side and also prepare on your projects as they ask scenario based question
Tip 1 : Be transparent on project section
Tip 2 : skills mentioned should be known
first telephonic
second telephonic both technical
managerial
and last director level
How node js manages multiple thread
just answered internal implementation of event in node
based on availability with 2 techies
event programing concept in node
Tip 1: prepare on basics
Tip 2: if experienced should know how to manage scenario based requirements
Tip 3: API side basic
managerial
How will you manage new technology
Tip 1: you should have zeal to learn
Tip 2: be positive
Tip 3: energy should be high

Here's your problem of the day
Solving this problem will increase your chance to get selected in this company
What is recursion?