Site Reliability Engineer, DNS

Are you looking to Optimize your life? Start your exciting path to a rewarding career today!

We are Optimum, a leader in the fast-paced world of connectivity, and we're on the hunt for enthusiastic professionals to join our team! We understand that connectivity isn't just a luxury anymore - it's a necessity that empowers lives, fuels businesses, and drives innovation. A career at Optimum means you'll be enabling progress and enhancing lives by providing reliable, high-speed connectivity solutions that keep the world connected.

We owe our success to our amazing product, commitment to our people and the connections we make in every community.

If you are resourceful, collaborative, team-oriented and passionate about delivering consistent excellence, Optimum is the Company for you!

We are Optimum
!

Job Summary

The Role DNS Engineer - SRE is a high-impact role responsible for the architecture, scalability, and reliability of the mission-critical DNS infrastructure powering our ISP and core network services. This position is designed for an engineer who views infrastructure through the lens of Site Reliability Engineering (SRE) prioritizing automation, observability, and self-healing systems over manual intervention. You will combine deep IP networking and DNS expertise with modern security protocols to ensure our platforms remain resilient against evolving threats and perform at the highest level for millions of users.

The Impact This is a collaborative and influential role. Beyond core engineering, you will serve as a technical authority, leading cross-functional initiatives with Product, Security, and Service Assurance teams. Your goal is to deliver a carrier-grade DNS ecosystem that balances cutting-edge privacy standards (DoH/DoT) with the uncompromising availability required by Tier-1 network operations.

• Architectural Ownership: Lead the design and evolution of global DNS architectures, ensuring high availability through Anycast routing, multi-provider redundancy, and automated failover mechanisms.
• Strategic Vendor Relations: Act as the primary technical authority in engagements with DNS and infrastructure vendors, driving roadmaps that align with our long-term reliability and security goals.
• Lifecycle & Capacity Management: Oversee the full lifecycle of DNS platforms—including automated software deployments, hardware refreshes, and proactive capacity planning—to stay ahead of traffic growth.
• Standardization & Policy: Optimize, Define and enforce organization-wide standards for DNS record management, security protocols (DNSSEC), and traffic steering policies to optimize user latency.
• Reliability Engineering: Convert "Strategic Design" into "Operational Reality" by defining Service Level Objectives (SLOs) and Error Budgets for all core name services.

• Protocol Management: Manage the nuances of UDP/TCP port 53, recursion vs. iteration, and complex record types (A, AAAA, CNAME, MX, TXT, SRV).
• Security & Mitigation: Implement and manage DNSSEC to prevent cache poisoning; act as a subject matter expert in mitigating DDoS and DNS amplification attacks.
• Automation (Eliminating Toil): Replace manual updates and "pool" management with automated workflows using Python, Go, Ansible, or Terraform.
• Performance Tuning: Perform Linux kernel tuning for high-performance network throughput and conduct deep-dive log analysis on systems like BIND, Unbound, or Power
  
  DNS.
• Observability: Utilize Prometheus, Grafana, and dnstap to monitor query rates and latency, providing actionable insights into error codes (NXDOMAIN, SERVFAIL).

Minimum Qualifications

• Education:
  
  Bachelor's degree in Computer Science, Telecommunications, or a related field (or equivalent practical experience in networking and security)
• Experience:
  
  5+ years in a networking or systems engineering role, with a focus on SRE principles (automation, reliability, and monitoring) in production environments
• DNS Fundamentals:
  Hands-on experience configuring and maintaining at least two of the following: BIND, Unbound, Power
  
  DNS, AWS Route 53, or Azure DNS
• Networking Protocols:
  Functional understanding of TCP/IP…