Róbert Juhász

Scaled up the IoT hub for a globally distributed system to better serve the increasing server load, improve stability, and support upcoming feature development.

I broke down the responsibilities of the hub to specific use cases and reorganized the code accordingly. Certain patterns emerged, presenting a great opportunity to create a lightweight framework with plugin-like use cases and extracting most of the functionalities from the hub center. This eliminated the main bottleneck, allowing a higher load to be handled. The framework streamlined the control flow and reduced code duplication, allowing the use-case code to focus solely on specific business logic.

I relied heavily on an API test suite, complementing it where it was lacking, and did all the heavy modifications in the code incrementally, while continuously keeping it functioning. The modifications passed QA and went to production without a single flaw.

A web-based remote support solution slated to become the next version of GoToAssist and Rescue.

I joined as a developer when the project was in its infancy as an experiment, and I followed its growth to becoming a large-scale service that's distributed globally. As a full-stack developer, I directly developed many of the functionalities in the back end and the web front end on both end-user sides.

As the project and the team grew, so did my responsibilities. I shifted my focus from developing features to enabling the team of 20+ engineers to develop faster and better. This involved system and software architectural work, building a CI/CD pipeline, API testing, process development, product usage analysis, and mentoring junior colleagues.

My development tasks consisted of the project's most complicated issues and the features that required fundamental extensions of the back end and front end. Most often, I was the person who stabilized the early implementations of new features after they passed market validation.

A framework for testing a back-end domain using the same WebSocket channels used by the front end.

Over the years, the framework matured significantly as the domain and the test suite grew, making it extremely easy to write (otherwise complex) test cases in just 5-10 lines of code. The tests ran in VSTest with no outer dependencies, using in-memory databases and mock services, making them very fast. These API tests made it possible to test-drive feature development on an integration test level and safely make huge changes in the code.