Software Engineer II - Inline Mailflow
Join Abnormal AI as a Software Engineer II to build next-gen SMTP relay infrastructure for email security.
Skills & Technologies
Requirements
- Experience
- 3+ years
- Education
- Bachelor's degree
Benefits
Joblaze summary
The Software Engineer II for Inline Mailflow at Abnormal Security will focus on designing and implementing core components of a new SMTP relay infrastructure, ensuring it meets the demands of high-volume enterprise email. Candidates should have a strong background in backend development, particularly with distributed systems, and be proficient in Go or Python. This role is ideal for engineers with at least three years of experience who thrive in dynamic environments and can navigate the complexities of building from the ground up. The Inline Mailflow team is positioned to play a crucial role in enhancing the company's email security capabilities.
Joblaze insights
- Listed yesterday on Joblaze — tracked directly from Abnormal Security's career page.
- Abnormal Security has 95 other open roles including Sales Development Representative, Sales Development Representative, Nordics, Software Engineer II - Inline Mailflow.
- 2358 active Python roles on Joblaze right now.
- 1250 active AWS roles on Joblaze right now.
- 1056 active Kubernetes roles on Joblaze right now.
- Salary band is below the typical range for Backend (median ~$166,000).
Quick facts
- What's the salary range?
- Abnormal Security lists $149,200–$214,500 for this role.
- How much experience is required?
- At least 3 years of relevant experience for this Software Engineer II - Inline Mailflow role.
- What's the tech stack?
- Joblaze extracted these technologies from the posting: AWS, Spark, Django, Prometheus, Go, Python.
- What seniority level is this role?
- Abnormal Security targets mid-level candidates for this position.
- Is this full-time or contract?
- Full-time for this Software Engineer II - Inline Mailflow role at Abnormal Security.
From the original posting
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 development within the team.
Must Haves
- 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.
Nice to Have
- 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.
#LI-RT1
Actual compensation will be determined based on several non-discriminatory factors including skills, experience, qualifications, and geographic location.
In addition to base salary, this role may be eligible for bonus or incentive compensation, equity, and a comprehensive benefits package.
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.