S3, Nodejs, Cloud Watch, Vpc, Git, Lambda, Sns, Api Gateway, AWS, RDS, Apis, Http, Iam, Rest Services, AWS Route 53, OPEN API Specification, automated unit test cases, EBS, Agile-Scrum Methodology, Cognito, SQL databases, Serverless Software development, object-oriented programming, Web Sockets, No-SQL databases, Event-driven architectures