About the role

Software Engineer II developing next-generation SMTP relay infrastructure at Abnormal AI. Building scalable mail flow harness for outbound email security with emphasis on engineering excellence.

Responsibilities

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.

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.