Crossref is looking for a senior software developer for a back-end role. They use Kotlin, Postgres, and AWS (S3, SQS). Experience with the specific stack is not required if you can learn on the job.
Crossref is a not-for-profit organization operating open scholarly infrastructure, providing open source, open data, and open APIs to connect global scholarly research. If you've ever seen or clicked on a DOI in a scholarly article, that's us.