Software Engineer, Abnormal AI

• 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 our stack: 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 teams; proficient in asynchronous and written communication

Desirable

• 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
• 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 development within the team