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.

What you will do

Design & execute software projects that are critical to Abnormal's core product, working with a team of engineers through conception, design, implementation, launch, and operation

Own and improve the stability, performance, and scalability of tier 0 backend services that process billions of emails daily

Collaborate with teams across R&D including Detection, Products, and Infrastructure to ensure Message Infra services meet the needs of the broader organization

Participate in on‑call rotations to maintain the reliability and uptime of mission‑critical systems

Drive continuous improvement by identifying opportunities to enhance system efficiency, reduce operational overhead, and increase reliability

Raise the bar of engineering excellence, actively contributing to knowledge sharing within the team and participating in professional development activities

Must Haves

BS degree in Computer Science, Applied Sciences, Information Systems or other related engineering field

3+ years of industry experience on backend software development & distributed systems, designing & building software applications

Experience with our stack: Go and/or Python

Experience working with distributed teams, proficient in asynchronous and written communication

Experience building features & components from scratch and operating them, balancing feature development work with operational tasks

Open to following pre‑established guidelines, coding practices and conventions

You’re growth driven & looking to increase impact & responsibility over time

Nice to Have

Experience with our stack: AWS, K8, Django, Spark, Prometheus

Familiarity with AWS services and deployment practices

Knowledge of containerization using Docker or similar technologies

Abnormal AI is an equal opportunity employer. Qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, disability, protected veteran status or other characteristics protected by law. For our EEO policy statement please click here. If you would like more information on your EEO rights under the law, please click here.

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