Note: The job is a remote job and is open to candidates in USA. Abnormal AI is looking for a Software Engineer to join the newly formed Inline Mailflow team, which is building next-generation SMTP relay infrastructure. The role involves designing and implementing core components of the relay harness and collaborating with various teams to ensure reliable email security solutions.
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
Skills
- 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
- Solid understanding of email protocols and infrastructure (SMTP, MTA architecture, DNS, SPF/DKIM/DMARC)
- Experience with our extended stack: 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
Benefits
- Bonus or incentive compensation
- Equity
- A comprehensive benefits package
Company Overview
Abnormal AI is the leading AI-native human behavior security platform. It was founded in 2018, and is headquartered in Las Vegas, Nevada, USA, with a workforce of 1001-5000 employees. Its website is https://abnormal.ai/.