Senior Email Deliverability Engineer (worldwide remote, work anywhere)

CloudLinux is a global remote-first company. We are driven by our principles: do the right thing, employees first, we are remote first, and we deliver high-volume, low-cost Linux infrastructure and security products that help companies to increase the efficiency of their operations. Every person on our team supports each other and does what we can to ensure we all are successful. 

Imunify360 Security Suite is a product of CloudLinux Inc., the maker of the #1 OS in security and stability for hosting providers. Imunify is an innovative security solution designed specifically for shared and VPS/Dedicated servers. The automated, easy-to-use solution with the six-layer approach to security delivers comprehensive and complete attack prevention.

Check out our website for more information about our Imunify360 Product https://www.imunify360.com/

We are looking for a Senior Email Deliverability Engineer to join our Imunify360 Email team, which is building a smart, automated email protection system designed to ensure clean outbound traffic and preserve IP reputation for hosting providers.

In this role, you will bring recent, hands-on experience operating and launching email traffic at scale. Your primary focus will be on email-specific behavior, including traffic warm-up, IP and domain reputation management, abuse prevention, and deliverability validation during initial production rollouts.

You will play a key role in ensuring that newly launched services achieve stable deliverability, maintain a clean IP pool reputation, and do not introduce systemic risk, while contributing to the development of high-performance tools for spam detection, email infrastructure protection, and scalable deliverability.

Check out our website for more information about our Imunify360 Email product https://imunify360.com/imunify-email/

Responsibilities

• Lead email traffic launch and warm-up strategies for new services.
• Design and execute IP and domain warm-up plans, including ramp schedules, monitoring, and corrective actions.
• Own email reputation management, including proactive monitoring of RBLs, ISP feedback, and reputation signals.
• Define and monitor deliverability KPIs such as inbox placement, delivery rate, complaint rate, and bounce rate.
• Partner with platform engineers to translate deliverability requirements into controls and guardrails.
• Analyse traffic patterns to detect abuse, misconfiguration, or anomalous sending behaviour.
• Investigate and mitigate false positives, false negatives, and escalations related to email filtering.
• Document ISP-specific behaviors, geographic traffic characteristics, and known deliverability constraints.
• Support production incidents related to deliverability, reputation degradation, or traffic spikes.

Requirements

• 5+ years working with email systems or outbound email traffic in production.
• Direct experience launching new email services or IP pools, not just maintaining existing ones.
• Hands-on responsibility for:
  • IP and domain warm-up
  • Reputation recovery and protection
  • ISP-specific deliverability tuning
• 5+ years of experience with Python or Go
• Solid experience working with GNU/Linux and Bash / Shell scripting
• Strong understanding of:
  • SMTP behavior and common failure modes
  • Bounce handling, complaint feedback loops, and suppression logic
  • Abuse vectors and their impact on sender reputation
• Proven experience working with high-volume or reputation-sensitive email traffic.
• Familiarity with:
  • SPF, DKIM, DMARC and their operational impact
  • RBLs and reputation monitoring tools
  • Traffic segmentation and throttling strategies
• Comfortable working with logs, metrics, and dashboards to drive decisions.
• Ability to collaborate effectively with platform engineers.

Benefits

What's in it for you?

• A focus on professional development.
• Interesting and challenging projects.
• Fully remote work with flexible working hours, that allows you to schedule your day and work from any location worldwide.
• Paid 24 days of vacation per year, 10 days of national holidays, and unlimited sick leaves.
• Compensation for private medical insurance.
• Co-working and gym/sports reimbursement.
• Budget for education.
• The opportunity to receive a reward for the most innovative idea that the company can patent.

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