My job was mainly to synchronize data between the two systems in different ways. I got understand different types of receiving and sending data, such as: SOAP / REST API, FTP, Amazon S3, MSSQL, HTML and Selenium. Learned about the full cycle of buying/selling a product (placement of an order, payment, tracking, cancellation, RMA). Worked on maintaining the existing internal windows services, ASP.NET CORE API, fixing bugs for the CRM system.