Lead Network Engineer Job at Mastercard (Warsaw)

Lead Network Engineer

Mastercard

Location:
Poland , Warsaw

Category:
IT - Administration

Contract Type:
Not provided

Salary:

Not provided

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Job Description:

The Data Center and Network team is seeking a highly motivated and experienced Lead Platform Engineer to spearhead our Telcom Operations team forward by consistently innovating and problem-solving. The ideal candidate is passionate about problem solving and offering solutions to resolve Network and customer circuit issues. The role is pivotal in maintaining a secure, diverse network that supports the Mastercard backbone and customer network. You will work closely with Global Network and Data Center Engineers and will be responsible for engaging our Telecom Vendors to troubleshoot circuit issues and effectively message back results and solutions to isolate and resolve circuit troubleshoot issues.

Job Responsibility:

Serve as the lead escalation point for complex network circuit issues including DIA, MPLS, Ethernet, DWDM, backbone, and last-mile connectivity
Perform advanced fault isolation across carrier networks, customer premises, and internal infrastructure
Lead bridge calls with service providers, vendors, and internal teams during outages and degradations
Analyze circuit performance issues such as latency, packet loss, jitter, and flapping links
Validate carrier root cause analyses (RCA) and ensure corrective actions are completed
Oversee incident response for major outages, ensuring timely communication and resolution
Drive adherence to SLAs and ensure accurate incident documentation and ticket updates
Coordinate maintenance windows, circuit testing, and service restorations
Participate in on-call rotations and provide after-hours support for critical incidents
Work directly with global carriers and vendors to troubleshoot, escalate, and resolve circuit issues
Hold carriers accountable for SLAs, response times, and service quality
Support circuit turn-ups, migrations, upgrades, and decommissions from an operational readiness perspective
Mentor and guide Network Operations Engineers on troubleshooting techniques and best practices
Develop and maintain troubleshooting runbooks, knowledge articles, and standard operating procedures
Identify recurring issues and recommend proactive improvements to network design or operations
Provide input into tooling, monitoring enhancements, and automation initiatives
Partner with Network Engineering, Capacity Management, Service Delivery, and Architecture teams
Support change management processes and assess operational risk for network changes
Provide technical input for new circuit designs and vendor selections

Requirements:

7+ years of experience in Network Operations or Network Engineering with a strong focus on circuit troubleshooting
Deep hands-on experience supporting enterprise and carrier-grade networks
Strong understanding of: TCP/IP, BGP, OSPF, VLANs, QoS
DIA, MPLS, Ethernet, DWDM, and backbone connectivity
Network monitoring and ticketing systems
Data Center Connectivity
Proven ability to lead incident calls and manage high-severity outages
Experience working directly with telecom carriers and service providers
Strong documentation and communication skills

Additional Information:

Job Posted:
April 27, 2026

Expiration:
May 08, 2026

Employment Type:

Fulltime

Work Type:

On-site work

Mastercard - All Job Offers

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