DNS Reliability Engineer (SRE)

Optimum

Bethpage (NY)

Hybrid

USD 83,538 - 137,241

Full time

14 days+

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Job summary

Optimum is seeking a DNS Engineer – SRE to own the architecture, reliability, and scalability of our DNS infrastructure powering ISP and core network services. You will apply SRE principles, automation, and observability to deliver carrier‑grade availability for millions of users.

The role collaborates with Product, Security, and Service Assurance teams; candidates should have hands‑on DNS, networking, and Linux skills, plus experience with DNSSEC, DoH/DoT, and modern tooling.

Qualifications

Bachelor’s degree in Computer Science, Telecommunications, or related field (or equivalent practical experience).
5+ years in networking or systems engineering with SRE focus in production environments.
Hands‑on experience configuring and maintaining DNS servers (BIND/Unbound/PowerDNS/AWS Route53/Azure DNS).
Understanding of TCP/IP and DNSSEC; experience with DoH/DoT is preferred.

Responsibilities

Architect global DNS architectures with high availability and automated failover.
Lead vendor relationships for DNS infrastructure and set roadmaps.
Oversee DNS platform lifecycle, automated deployments, and capacity planning.
Define DNS standards, security protocols (DNSSEC), and traffic policies.
Establish SLOs and error budgets for core name services.
Manage protocol nuances (UDP/TCP 53, recursion vs. iteration).
Implement DNS security measures and DDoS mitigation strategies.
Automate operations with Python/Go, Ansible, or Terraform.
Monitor with Prometheus, Grafana, and dnstap; analyze NXDOMAIN/SERVFAIL.