Senior Network Infrastructure Engineer

Citi is looking for a Senior Network Infrastructure Engineer to join its Network and Client Infrastructure Services (NCIS) team, playing a key role in designing and delivering complex load balancing solutions that support global technology operations across the firm. In this role, you will translate technical and non-technical requirements into robust network designs, ensuring all solutions meet Citi's engineering standards and service delivery objectives. This is an opportunity to work at the intersection of infrastructure engineering and client service, collaborating with cross-functional teams across a large-scale global environment.

Responsibilities

• Design, configure, and implement Network Security and Network Engineering solutions — including SDWAN, firewall architectures, and routing/switching infrastructure — to meet Citi's security requirements.
• Architect and deploy enterprise routing solutions using Cisco routing and switching platforms, applying protocols such as BGP, OSPF, EIGRP, MPLS, and spanning-tree variants across enterprise and B2B environments.
• Design and operate SD-WAN solutions (e.g., Cisco Viptela, Versa, VeloCloud) across enterprise and B2B interconnects.
• Collaborate with cybersecurity professionals to evaluate and integrate new security technologies and vendors, designing robust security controls that meet business and regulatory requirements.
• Implement security best practices to maintain the highest level of security.
• Stay current with the latest cybersecurity and network engineering technologies and trends.
• Write technical guides, automation tools, working with vendor-provided utilities, and author, maintain, and update technical documentation, ensuring compliance with industry standards.

Required Qualifications & Skills

• Deep hands-on expertise with Cisco routing and switching and their derivatives (Catalyst, Nexus, ASR, ISR) — must-have.
• Strong command of routing protocols: BGP, OSPF, EIGRP, IS-IS, and MPLS/L3VPN.
• Proven SDWAN design and operations experience in enterprise or B2B connectivity contexts.
• Solid enterprise networking background: Campus LAN, WAN design, datacenter networking, and redundancy protocols (HSRP/VRRP).
• B2B networking experience — BGP peering, partner interconnects, and cross-organization integration — is a must.
• Deep understanding of Check Point / Palo Alto / Fortinet and open-source firewall technologies, their management systems and capabilities.
• Understanding of security protocols: IPsec, SSL/TLS, VPN, routing protocols, IDS/IPS, Proxies, WAFs.
• Leverage open-source automation and coding tools such as Bash scripting, Python, Ansible.
• Ability to proactively identify and respond to security threats against managed infrastructure components.
• Strong hands-on experience with network devices, firewalls, and Linux systems; ability to mass-manage configurations and quickly troubleshoot security controls.
• Author and maintain comprehensive technical documentation on implemented security systems and processes.
• Excellent communication and interpersonal skills, with the ability to work effectively with cross-functional teams and stakeholders at all levels.
• Familiarity with datacenter networks, enterprise Campus LAN, and Kubernetes containerization is a plus.
• Familiarity with security best practices and standards: ISO 27001, NIST, CIS; frameworks such as SANS; certifications such as CCIE, CCNP, CISSP, CISM, PCNSE, or NSE are preferred.

Beneficial Skills & Qualifications

• Familiarity with design metrics, analytics tools, and benchmarking methodologies used to evaluate infrastructure performance and identify improvement opportunities.
• Experience operating in a matrix organisation, coordinating across virtual and geographically distributed teams.
• A track record of leading operational process improvements that have delivered measurable outcomes in a complex technology environment.

What We Offer

At Citi, you will be part of a high-performing global engineering team where your work has real impact across the firm's technology infrastructure. We offer a collaborative, performance-driven environment that supports your professional growth, rewards ownership, and connects you to some of the most complex infrastructure challenges in financial services.

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

Apply today and bring your infrastructure engineering expertise to a global team where your designs shape the reliability and performance of Citi's technology at scale.

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. 

Sounds like Citi has everything you need?

Then apply to discover the true extent of your capabilities. 

#LI-AE1

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Citi is an equal opportunity employer, and qualified candidates will receive consideration without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, disability, status as a protected veteran, or any other characteristic protected by law.

If you are a person with a disability and need a reasonable accommodation to use our search tools and/or apply for a career opportunity review Accessibility at Citi.

View Citi’s EEO Policy Statement and the Know Your Rights poster.