Full-Stack Developer for Email Platform

We are looking for an experienced full-stack developer / DevOps engineer to take ownership of an existing email sending platform built in code (technology stack to be confirmed). We have the full source code available and require someone who can understand the existing application, deploy it, and bring it into a fully working production environment. This role includes setting up and configuring the email sending infrastructure (SMTP servers or equivalent), hosting the application and website, and managing the hosting and configuration of multiple domains used for the product. The ideal candidate will also be responsible for implementing and verifying proper email deliverability standards, including SPF, DKIM, and DMARC records, as well as ensuring server stability, security, and scalability. You should be comfortable working with an existing and potentially undocumented codebase, diagnosing deployment issues, and managing end-to-end infrastructure including servers, domains, and application hosting.