Full stack experience
When you hear the phrase “full stack”, what do you think it means in addition to frontend?
Perhaps you think of the person writing the APIs your frontend accesses. I've worked extensively with Node.js server frameworks such as Express and Koa, and have also written quite a bit of PHP. I've also done test projects in C#.
You'd probably want some database experience, too. I've worked with many flavors of SQL — my favorite is Postgres, but I'm also a fan of SQLite's simplicity, especially for portability. I have extensive NoSQL experience as well, having written applications for CouchDB, DynamoDB, and Mongo.
In 2020, no one can be "full-stack" without being familiar with cloud providers. I have the AWS Architect Associate certification, and frequently use other platforms such as Heroku or Vercel as appropriate. I've got my favorite tools, but I don't let that stop me from picking the right one for the job.
Shouldn't continuous integration also count as part of your stack? I've picked up these skills as necessary, learning Circle CI and Jenkins to remove delivery friction for my employer and my clients. See my case studies for details on how I enabled branch previews for a heavily-firewalled development team, or how I wrote integration tests for a platform we couldn't run locally.
Finally, modern web development demands excellent tooling. I have experience with customizing Babel and ESLint, which has allowed me to rapidly migrate old code and improve the developer experience of my teammates.