Senior-ish SWE with Ruby-on-Rails

Lifelong computer expert looking for a senior-ish SWE at a startup or midsize company. I have built and run infrastructure that supports entire companies (at one position) and contributed heavily to code that oversaw over $1b+ interest revenue annually (another position) under heavy growth. My expertise includes full-stack webdev, database design and admin, building telemetry and remote support for embedded apps, as well as standard intranet backoffice webapp and some frontend design. I believe strongly in testing and documentation and have on multiple occasions served as liaison to stakeholders in other parts of the org.