Senior DNS & IP Network Engineer

Job Overview

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. Your work will shape how one of the world's largest financial institutions manages its IP address estate across on-premises, cloud, and hybrid environments.

Responsibilities

• 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.

Required Qualifications & Skills

• 5 to 10 years of hands-on experience in enterprise DNS, DHCP, IPAM, or network infrastructure engineering.
• Deep knowledge of IPv4 and IPv6 addressing, subnetting, CIDR notation, route summarization, and address utilization analysis applied in large-scale environments.
• Demonstrated ability to architect, administer, troubleshoot, and secure enterprise DNS services across authoritative and recursive resolvers.
• Practical experience managing IP address allocations across data centers, cloud platforms, and branch networks, including governance and lifecycle processes.
• Experience working with enterprise DDI platforms such as Infoblox, BlueCat, TCPWave, or EfficientIP.
• Strong analytical and diagnostic skills, with a track record of resolving complex network infrastructure issues under pressure.
• Bachelor's degree in a relevant field, or equivalent professional experience.

Beneficial Skills & Qualifications

• Familiarity with Autonomous System Numbers (ASN), BGP fundamentals, RPKI, ROA management, and geofeed administration.
• Experience coordinating public IP resources directly with internet registries, cloud providers, or telecommunications carriers.
• Background in financial services or large-scale enterprise technology environments.
• Master's degree in a relevant discipline.
• Ability to work effectively across global virtual teams in a fast-paced, cross-functional setting.

What We Offer

At Citi, you will have the opportunity to work on infrastructure that operates at global scale, collaborating with network, cloud, and security teams across multiple geographies. This is a role where technical depth, engineering judgment, and initiative translate directly into outcomes that matter across the organization.

By joining Citi Hungary, you will not only be part of a business casual workplace with a hybrid working model (up to 2 days working at home per week), but also receive a competitive compensation package and enjoy a whole host of additional benefits that support you (and your family) to be well, live well and save well:

• Cafeteria Program
• Home Office Allowance (for colleagues working in hybrid work models)
• Paid Parental Leave Program (maternity and paternity leave)
• Private Medical Care Program and onsite medical rooms at our offices
• Pension Plan Contribution to voluntary pension fund
• Group Life Insurance
• Employee Assistance Program
• Access to a wide variety of learning and development programs, online course libraries and upskilling platforms, such as Udemy and Degreed
• Flexible work arrangements to support you in managing work - life balance
• Career progression opportunities across geographies and business lines
• Socially active employee communities with diverse networking opportunities

Alongside these benefits Citi is committed to ensuring our workplace is where everyone feels comfortable coming to work as their whole self every day. We want the best talent around the world to be energized to join us, motivated to stay, and empowered to thrive.

Discover your future at Citi

Working at Citi is far more than just a job. A career with us means joining a team of approximately 219,000 dedicated people from around the globe. At Citi, you’ll have the opportunity to grow your career, give back to your community and make a real impact.