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Senior Systems Engineer - Email Deliverability & Infrastructure

Bucharest, Bucharest, Romania🌐 Remote💼 Full-time💰 $24,000–$24,000🗓 2026-06-03 → 2026-09-25

Core

Architect and maintain high-availability email transmission infrastructure, focusing on server stability, authentication protocols, and defensive systems to ensure inbox placement and reputation management.

Role type

Senior Systems Engineer (Email Infrastructure & Deliverability)

Builds

High-availability mail server clusters, automated defensive systems, and reputation management pipelines

Domain

Email Infrastructure, Network Engineering, Security

Deliverable

production ML models | product features | infrastructure

Required skills

Linux Systems Administration, MTA configuration (Postfix, Postal, Dovecot), Network Engineering (TCP/IP, BGP, HAProxy), DNS & Authentication (SPF, DKIM, DMARC, BIMI), Security Filtering (Rspamd, Fail2Ban), Log Aggregation (Vector), Database Management (PostgreSQL)

Preferred skills

None stated

Technologies

Postfix, Postal, Dovecot, HAProxy, FRRouting, PostgreSQL, Rspamd, Fail2Ban, Vector, Google Postmaster Tools, Microsoft SNDS, Yahoo Sender Hub

Responsibilities

Maintain and optimize core MTAs and IMAP/POP3 servers for high availability; Architect traffic routing and load balancing mechanisms; Implement automated spam filtering and edge defense systems; Manage DNS authentication protocols and IP warm-up strategies; Monitor ISP infrastructure portals and deliverability metrics; Respond to blocklist listings and security incidents.

Seniority

Senior, hands-on IC

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