Build all kinds of applications: back end, front end, full stack, mobile, whatever tool is required for the task.
Build applications in a variety of different domains and languages, both in an enterprise setting and my own hobby projects.
Build Microservices, Monoliths, and everything in-between, whatever is appropriate for the project.
Build clean, scalable, reliable, and readable applications with techniques like Event Sourcing, DDD, CQRS, and other patterns.