Site Reliability Engineer - Email Infrastructure
On-siteNew York City, New York, United States or New York, United States
Job Summary
Engineer high-availability, stateless Postfix clusters on Linux using Terraform or Ansible to manage configuration drift. Build sophisticated dashboards with Prometheus, Grafana, and ELK to visualize queue latency, delivery rates, and SMTP performance in real-time. Lead the architectural shift from legacy EWS Polling to Event-Driven Graph API Webhooks, writing glue code in Python or Go to decouple internal apps from the backend. Programmatically manage sender reputation by automating IP warming and enforcing DMARC, DKIM, and SPF standards across thousands of domains. Manage the edge defense layer using policy-as-code to focus on threat detection and automated remediation pipelines. This role involves a hybrid schedule in New York, NY, with top-tier compensation for an elite technology group treating infrastructure as code.
Required Qualifications
- 7+ years of Engineering experience in high-volume messaging or complex infrastructure environments
- Deep comfort with the Linux kernel, TCP stack tuning, and Postfix/MTA configuration management
- Proven experience writing production code (Python, Go, or advanced PowerShell Core) to wrap APIs and automate workflows
- Experience managing infrastructure via Terraform, Ansible, or similar config management tools
- You understand SMTP, TLS, and DNS at the packet level and can debug complex handshake failures in a Wireshark trace
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