Programming:  

• Nodejs (Including Advanced Nodejs concepts, Async Await, Promises etc.)  
• Express framework  
• Strong proficiency with JavaScript  
• Socket.io  
• Experience in third party API integrations - added advantage  
• Angular 2+ (added advantage)  
• Experience in AWS services (EC2, S3, SQS) - added advantage  

Datastore: 

• Mongo DB or similar relational databases  
• Knowledge of Aggregate, group queries, DB pool, transactions, etc.  
• Redis store