We are looking for:

A Senior Network Engineer who wants to work on enterprise-scale environments and real network transformation projects, not only day-to-day operations.

Your day at NTT DATA

The Senior Network Engineer (L3) is a hands-on technical expert responsible for design, implementation, and optimization of complex enterprise network environments, with a strong focus on project delivery and technical ownership

You will work on both strategic initiatives (e.g. migrations, redesigns, modernization) and advanced operational challenges, acting as a key escalation and engineering authority.

Key Responsibilities

• Lead design and implementation of enterprise LAN/WAN/WLAN solutions
• Take ownership of network transformation projects (e.g. SDA, SD-WAN, DC migrations, network redesigns)
• Define and implement network architecture aligned with business and technical requirements
• Act as L3 escalation point for complex incidents and critical issues
• Work with network automation and configuration tools (e.g. Ansible, APIs, scripting)
• Participate in solution design reviews and technical governance
• Lead troubleshooting and perform deep root cause analysis across multi-domain environments
• Drive technical decision-making in projects and operational improvements
• Plan and execute network changes, upgrades, and migrations (including risk mitigation)
• Collaborate with architects, project managers, vendors, and global teams
• Contribute to standardization, automation, and continuous improvement of network services
• Support pre-sales or technical consultations when required (solution input, feasibility

Your Profile

• 5+ years of experience in Network Engineering (including L3 / senior responsibilities)
• Strong experience in designing and implementing enterprise networks (not only operations)
• Proven track record of working on projects (migration, rollout, transformation)
• Strong ownership mindset and ability to independently drive technical topics
• Experience acting as escalation point and handling critical incidents
• Ability to work across teams and coordinate technical activities end-to-end
• Fluent in Polish and English (mandatory)

Technologies

Core:

• Cisco networking (Catalyst / Nexus – routing & switching)

• Routing protocols: OSPF, BGP

• L2/L3 concepts: VLANs, STP, QoS

Security:

• Cisco ISE / AAA (RADIUS/TACACS+)

Enterprise:

• WLAN (WLC, RF basics, design)

• SD-WAN solutions

• Cisco SD-Access (SDA)

Nice to have ( any of this will be additional asset):

• Data Center networking (Nexus, ACI)

• Network automation (Ansible, scripting, APIs)

• Firewall technologies (Palo Alto, Fortinet, Cisco)

• Cloud networking (AWS / Azure))

Certifications

• CCNP Enterprise or higher (strongly preferred)
• Additional vendor certifications are a plus

What you’ll work on

• Large-scale enterprise environments (multi-site, campus & WAN)
• Network transformation programs and modernization initiatives
• Data center and campus network redesigns
• End-to-end delivery (design → implementation → optimization)
• Cross-country / international projects

What we offer

• Work on real engineering projects – not only BAU/support
• Opportunity to influence architecture and technical direction
• Access to certifications and advanced technical training (Cisco, cloud, security)
• Hybrid work model (Warsaw + remote)
• Collaboration with experienced engineers and architects
• Stable role in a global organization (NTT DATA)