I worked with another developer on my team to triage and fix an important bug that was impacting the display of revisions and history for posts on Stack Overflow and the Stack Exchange network. While the actual fix was a one character change, triaging it was an in depth process that took a long time to identify and fix.

I wrote an explanation of the bugfix here:
https://meta.stackexchange.com/a/369886/718314

After seeing no negative result in the unpinning A/B test (and in fact seeing a positive impact), we permanently unpinned accepted answers on Stack Overflow.

I was the one to flip the big scary switch to unpin things here.

https://meta.stackoverflow.com/q/411352/3023052

Shipped the Unpinning Accepted Answers experiment. This was an A/B test across all Stack Overflow visitors to compare the behavior between when we pin or unpin the accepted answer.

We looked at how users copied and voted in these two scenarios. We were looking to see no negative behavior emerge to confirm that we weren't causing harm.

I was involved in developing the ability to measure some of these metrics as well as helping to set up the experiment with our internal A/B testing tool.

https://meta.stackoverflow.com/q/411192/3023052

I recieved training to interview software developers here at Stack Overflow for our open roles:
https://stackoverflow.com/company/work-here

I became a Scrum Alliance Certified ScrumMaster! I took a training course with Agile Mentors last week and learned how to do Scrum the right way 🙌

https://bcert.me/sxhhxcssh

We wrapped up a project that makes it easier for our community managers to run moderator elections on our Stack Exchange sites. While these changes don't impact users directly, it frees up a lot of time for our community managers, letting them accomplish more.

https://meta.stackexchange.com/q/366408/718314