Mail Systems Engineer

Job description

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 are all successful.

You will join the Imunify Email team - the creators of a smart, automated email protection system designed to ensure clean outbound traffic and preserve IP reputation for hosting providers. Our focus is on building high-performance tools for spam detection, email infrastructure protection, and scalable deliverability.

Check out our website for more information about our Imunify Product - https://imunify360.com/

As our Mail Systems Engineer, you will:

• Design the core architecture of the Postfix/Exim worker nodes.

• Write and maintain the advanced MTA configurations that handle mail routing and IP binding.

• Implement the logic for dynamic IP selection using techniques like Postfix’s transport_maps and multiple transports, or Exim’s routers and transports.

• Тroubleshoot complex email delivery issues, analyze bounce messages, and optimize MTA performance for high throughput.

What you bring:

• Expert-level knowledge of Postfix or Exim - far beyond basic setup.

• Proven experience managing large-scale, high-volume email clusters

• Deep understanding of SMTP, SPF, DKIM, DMARC, and feedback loops (FBLs).

• Proficiency in scripting languages (e.g. Perl, Python, Bash) for MTA-related tasks.

• Knowledge of C is a great advantage.

• English proficiency - upper-intermediate and higher.

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.

By applying for this position, you consent to the processing of your personal data as described in our Privacy Policy ( https://cloudlinux.com/candidate-privacy-notice ), which provides detailed information on how we maintain and handle your data.