Many of the projects I work on are under NDA, so I can't reveal too many specific details.  These are a few of the projects where I have permission to show you what they look like, and explain a few of the details about how they are designed and architected.

I work almost as much in the Open Source world as I do in Microsoft.  To be honest there is very little difference between C# and java and other than a few minor differences, the design and most of the code styles are the same.

Much of the work I have done includes both a web based component where management of the remote systems is handled and data is collected and analyzed.  Some of these have multiple clients installed in the field that need periodic updating and constant monitoring.  They create data that is important to running the business and valuable to understand.

Depending on the data, the web sites may also have data analytics that allow the user to slice and dice the data as they drill down into the data looking for trends that can be used to optimize their sales by understanding the buying behavior of their customers.

Some of the work is "IT" type applications that are run as background services within a company to automatically handle data.  Some of these types of applications included moving data between insurance claims systems, bill review systems and finance systems to make the disparate systems work as one.  Another example reads emails that arrive (in volume every night) and parses the data into the corporate database where it is used to create invoices and royalty payments.