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Infrastructure & Systems Engineer

We engineer, deploy and maintain high-throughput email delivery infrastructure for enterprise clients. As a systems Engineer, you will own the lower-level delivery stack, managing distributed domain fleets, automating DNS security configurations, and programmatically optimizing entire infrastructures.

What you'll achieve

• Programmatically provision and manage isolated domain pools across AWS Route 53, Cloudflare, and custom DNS providers.

• Implement and audit strict cryptographically signed authentication standards (SPF, DKIM key rotation, DMARC enforcement, BIMI and TLS/STARTTLS protocols).

• Develop Python/Node.js & Go micro-services to monitor real-time delivery telemetry, bounce classifications, and RBL (Real-time blackhole List) state transitions.

• Analyze mail server logs (Postfix, Sendmail/MTA APIs) to isolate network-layer drop-offs, deferred queues, and dynamic rate-limiting policies applied by major inbox providers (Google Workspace, Microsoft 365).

Skills & Experience

You have deep understanding of TCP/IP, DNS record types (A, AAAA, MX, TXT, CNAME), and the SMTP protocol specification (RFC 5321 / 5322)

Hands-on experience with asynchronous scripting (Python, Go, or Node.js) and REST/Webhook-driven infrastructure automation.

Experience running diagnostic workloads with toolsets like dig, traceroute, openssl, and MTA log aggregators.

Familiarity with anti-spam engine mechanics SpamAssassin heuristics, IP rep scoring, and feedback loops).

Benefits

💸 Competitive package 🚀 Join a small and agile team 🎪 Remote work available