Abnormal AI
AI
SoftwareEngineerII-InlineMailflow
Neural analysis suggests this role is
optimal for Mid candidates.
“Software Engineer II - Inline Mailflow at Abnormal AI. Skills: Backend development, Distributed systems, SMTP relay infrastructure, Go/Python. Design and implement core components of the SMTP relay harness. Co-build the production relay alongside existing infra engineers”
What You'll Achieve.
Power our outbound email security motion; Long-term SEG displacement strategy; Support inbound and outbound use cases; Handle high volumes of enterprise email at production SLA; Driving continuous reliability improvements
Industry & Context.
Participating in on-call rotations
What They're Looking For.
Must Have
BS degree in Computer Science, Applied Sciences, Information Systems, or a related engineering field, 3+ years of backend software development experience with distributed systems, designing and building production services, Hands-on experience with Go and/or Python, Experience building features and components from scratch and owning them in production, balancing feature development with operational work, Comfortable with ambiguity and 0-to-1 projects where you help shape requirements alongside product and engineering stakeholders, Experience working with distributed proficient in asynchronous and written communication
Nice to Have
Solid understanding of email protocols and infrastructure (SMTP, MTA architecture, DNS, SPF/DKIM/DMARC), Experience with AWS, Kubernetes, Django, Spark, Prometheus, Familiarity with email security products or Secure Email Gateways (SEGs) such as Proofpoint, Mimecast, or Microsoft Defender, Experience with email deliverability concepts: IP reputation, bulk sending infrastructure, bounce handling, or feedback loops, Familiarity with containerization using Docker or similar technologies
What You'll Do.
Design and implement core components of the SMTP relay harness
Co-build the production relay alongside existing infra engineers
Own and operate tier-0 mail flow services
Contribute to technical design discussions
How You'll Work.
Team & Collaboration
Collaborate with PMs and Solutions Architects; Contribute to knowledge sharing, runbooks, and professional development within the team; Work closely with product and engineering stakeholders
Communication Scope
Written communication
Full Job Description
About the Role Abnormal AI is looking for a Software Engineer to join the newly formed Inline Mailflow team. This team is building Abnormal’s next-generation SMTP relay infrastructure - a scalable mail flow harness that will power our outbound email security motion and long-term SEG displacement strategy against competitors. The Inline Mailflow team will operate as a close counterpart to the current Inline Remediation team and will live within the Message Platform group. The relay harness will serve as the foundation for a growing portfolio of capabilities including outbound filtering, DLP enforcement, misdirected email detection, IP management, encryption, archiving, and DMARC enforcement. The ideal candidate has strong backend and distributed systems experience, a deep appreciation for email infrastructure, and the ability to thrive in a fast-moving 0-to-1 build environment. What you will do Design and implement core components of the SMTP relay harness, including Mail Transfer Agent (MTA) infrastructure, scalability, IP management, encryption, and DMARC support, working from conception through production operation. Co-build the production relay alongside existing infra engineers, ramping toward full ownership of defined services as the product matures through Q3 and into EA. Collaborate with PMs and Solutions Architects to translate customer requirements into reliable, opinionated relay configurations that support inbound and outbound use cases. Own and operate tier-0 mail flow services that handle high volumes of enterprise email at production SLA, participating in on-call rotations and driving continuous reliability improvements. Contribute to technical design discussions on how the relay integrates with existing inline products (outbound DLP, behavioral outbound, misdirected email), helping define the architecture of the broader Mail Flow platform. Raise the bar of engineering excellence by contributing to knowledge sharing, runbooks, and professional developm
Applying for this Software Engineer II - Inline Mailflow role?
Most applicants get filtered before a human reads their resume. See if yours makes the cut.
ANONYMOUS · UNFILTERED
What do employees actually say about Abnormal AI?
Real rants from real employees. Read before you apply.