Senior Systems Engineer - Email Deliverability & Infrastructure
New
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Mission InboxInfrastructure Engineering
Bucharest, Bucharest, Romania. Kyiv, Kyiv city, Ukraine. Belgrade, Vojvodina, Serbia. Palermo, Buenos Aires, Argentina. Sao Paulo, State of São Paulo, Brazil. Bogotá, Bogota, ColombiaContractSenior
Salary50,000 - 72,000 USD per year
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Job Details
- Experience
- 5+ years
- Required Skills
- PostgreSQL
Requirements
- 5+ years of experience as a Linux Systems Administrator, DevOps, or Infrastructure Engineer.
- Deep networking knowledge including TCP/IP, routing, ports, and DNS management.
- Expert-level proficiency configuring, debugging, and optimizing Postfix, Dovecot, or Postal.
- Hands-on experience writing rules for Rspamd and Fail2Ban.
- Experience building or maintaining log pipelines using Vector.
- Experience implementing HAProxy and FRRouting.
- Experience with PostgreSQL replication.
- Familiarity with automated SSL/TLS certificate rotation.
- Expert parsing of aggregate DMARC reports.
- Firm grasp on Feedback Loop (FBL) automated triage.
Responsibilities
- Maintain and configure core MTAs (Postfix, Postal) and IMAP/POP3 servers (Dovecot).
- Utilize HAProxy and network routing protocols like BGP to distribute traffic.
- Administer PostgreSQL replica setups and block backup/archive servers.
- Maintain strict workload isolation across infrastructure nodes.
- Enforce SPF, DKIM, DMARC, and BIMI protocols.
- Implement MTA-level dynamic throttling to handle deferrals.
- Design and guide automated IP/Domain warm-up plans.
- Optimize Rspamd and Fail2Ban for outbound spam and connection protection.
- Manage log aggregation pipelines using Vector.
- Monitor ISP portals and third-party tracking tools.
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