Senior DNS & IP Network Engineer
1,429,816 – 2,397,317 Ft / month
Employer · Citi
System administratorCybersecurity specialistFlexibleFull-timeBudapest
Citi is looking for a Senior DNS & IP Network Engineer to own and evolve the enterprise DNS, DHCP, and IP Address Management (IPAM) infrastructure that underpins network connectivity across a global, multi-cloud environment. In this role, you will serve as the technical authority for DDI services, driving architecture decisions, automation initiatives, and security improvements that directly support Citi's global operations.
Tasks
- Design and implement highly available DNS architectures across global enterprise environments, ensuring resilience, scalability, and alignment with network security standards.
- Manage the full lifecycle of IPv4 and IPv6 address allocations — from subnet design and address planning through to utilization tracking, reclamation, and capacity forecasting.
- Own enterprise IP space governance, defining and maintaining IP allocation policies, standards, and workflows across data centers, cloud platforms, branch offices, and application environments.
- Coordinate public IP address allocations with Regional Internet Registries including ARIN, RIPE NCC, APNIC, and LACNIC, and manage related ASN and internet routing resource requirements.
- Build automation solutions for DNS, DHCP, and IPAM administration using Python, Ansible, Terraform, or REST APIs to reduce manual effort and improve operational consistency.
- Lead DNS security initiatives including DNSSEC deployment, Response Policy Zones (RPZ), threat intelligence integration, monitoring, logging, and DDoS protection measures.
- Investigate and resolve DNS, DHCP, and IP allocation incidents, producing root cause analyses and recommendations to prevent recurrence and strengthen service reliability.