Software Engineer II - Message Infrastructure

About The Role

Abnormal AI is seeking a Software Engineer to join the Message Infrastructure team. The Message Infra team is responsible for building and maintaining stable, efficient, and hands‑off systems that power the ingestion of billions of emails per day. Our systems are the backbone of Abnormal's core Inbound Email Security product—handling everything from upstream mailbox monitoring and email notifications to downstream remediation actions on malicious messages.

The Message Infra team develops and manages tier 0 backend services that are mission‑critical to Abnormal's success, including but not limited to Subscription Manager (which mailboxes we monitor), Notification Producer (processing new email notifications from providers), and Remediation (executing actions on malicious messages). This is a backend and systems‑heavy team, and the ideal candidate will have experience working with distributed systems at scale and a passion for operational excellence...