Sr. Networking Engineer

LendingTree•Charlotte, NC

6d•$110,000 - $140,000•Hybrid

About The Position

As a Senior Network Engineer, you will lead the implementation, maintenance, optimization, and architectural design of LendingTree's enterprise network infrastructure. You will serve as a subject matter expert in our Fortinet-based environment, including firewalls, switches, access points, FortiSASE, and SD-WAN solutions. Collaborating with Infrastructure Engineering, Security, Cloud Operations, and DevOps teams, you will support network modernization, automation, and reliability initiatives. This role is ideal for a Senior engineer who is familiar with modern Infrastructure as Code (IaC) principles, network automation, and modern cloud networking architectures across AWS and Azure while embracing SRE fundamentals to ensure our network services are reliable, scalable, and observable.

Requirements

5+ years of experience in network engineering or a related technical role
2+ years of hands-on experience with Fortinet products (FortiGate firewalls, FortiSwitch, or FortiAP)
Hands-on experience with cloud networking in AWS and/or Azure environments
Experience in enterprise-scale environments, leading projects, or mentoring teams. Mentor junior network engineers and provide technical guidance. Lead network architecture reviews and roadmap planning.
Solid understanding of network protocols ( BGP , OSPF , VLAN , STP , LACP , etc.)
Experience with VPN technologies (IPSec, SSL VPN, SD-WAN )
Familiarity with Git and CICD Pipelines
Fortinet: Working knowledge of FortiOS, FortiGate firewall configuration, FortiSwitch, FortiAP wireless, and FortiSASE
Cloud Networking: Basic understanding of AWS VPC design, Azure VNet architecture, and hybrid connectivity
Automation: Scripting skills in Python, Bash, or PowerShell; exposure to Terraform or Ansible
Observability: Hands-on experience with log management and monitoring tools (SumoLogic, FortiAnalyzer, CloudWatch, or similar)
Security: In-depth knowledge of network security principles, firewall policies, and VPN configurations
Troubleshooting: Experience with packet analysis tools (Wireshark, tcpdump)
Strong analytical and problem-solving skills
Leadership skills, ability to mentor and develop team members, strategic thinking, and experience influencing cross-functional stakeholders.
Good communication skills with ability to document technical processes clearly
Ability to work effectively in a hybrid team environment
Eagerness to learn new technologies and grow technical expertise
Strong documentation skills and attention to detail
Ability to work collaboratively and ask questions when needed

Nice To Haves

Fortinet NSE certifications: NSE 5+
Cloud certifications: AWS Advanced Networking Specialty or Azure Network Engineer Associate.
Networking certifications: CCNA , CCNP , or equivalent
Hands-on experience with FortiManager and FortiAnalyzer for centralized management and analytics
Familiarity with containerized networking (Kubernetes, Docker)
Strong grasp of SRE practices, SLIs/SLOs, and incident management
Hands-on experience network observability platforms (SumoLogic, Datadog, Splunk)
Knowledge of DevOps practices and agile methodologies
Experience in a SOX -compliant or regulated environment
Strong understanding of SD-WAN optimization and application-aware routing
Bachelor's or Master's degree in Computer Science, Information Technology, Network Engineering, or related field (not required, but nice to have)
Equivalent combination of education, training, and experience will be considered

Responsibilities

Network Infrastructure Design, implement, and maintain enterprise network infrastructure including Fortinet firewalls (FortiGate), switches (FortiSwitch), and wireless access points (FortiAP)
Manage and optimize FortiSASE (Secure Access Service Edge) for secure remote access and SD-WAN connectivity
Administer FortiNAC (Network Access Control) for device visibility, authentication, and network segmentation
Monitor network performance, troubleshoot complex issues, and ensure high availability of critical network services
Implement and maintain network security policies, VPNs, and firewall rules aligned with security best practices
Perform capacity planning and make recommendations for network infrastructure upgrades and expansions
Cloud Networking Design and implement cloud networking solutions in AWS (VPC, Transit Gateway, Direct Connect, Route 53, CloudFront, etc.)
Design and implement cloud networking solutions in Azure (VNet, VPN Gateway, ExpressRoute, Azure Firewall, Traffic Manager, etc.)
Build and maintain hybrid cloud connectivity between on-premises Fortinet infrastructure and cloud environments
Support hybrid cloud connectivity between on-premises Fortinet infrastructure and cloud environments
Assist with cloud-native security controls and network segmentation
Observability Leverage SumoLogic and FortiAnalyzer for network observability, log analysis, and alerting
Define and monitor Service Level Indicators (SLIs) and Service Level Objectives (SLOs) for network services
Participate in incident response, blameless postmortems, and root cause analysis
Identify and reduce toil through automation and process improvement
Contribute to runbooks and operational documentation to improve reliability
Automation Develop and maintain Infrastructure as Code (IaC) using Terraform for network infrastructure provisioning and configuration management
Implement CI/CD pipelines for automated deployment of firewall rules, network configurations, and policy changes
Create automation scripts using Python, Ansible, or other tools to streamline network operations and reduce manual tasks
Leverage Fortinet APIs and SDKs for programmatic network management and orchestration
Build self-service capabilities and automation workflows to improve operational efficiency
Collaboration & Support Partner with InfoSec teams on implementing security controls and policies
Collaborate with DevOps and Platform Engineering teams to support application infrastructure requirements
Work with Infrastructure Engineering team on server, storage, and virtualization networking needs
Create and maintain network documentation, diagrams, and runbooks
Participate in on-call rotation to provide support for critical network infrastructure
Respond to and help resolve network incidents, outages, and performance issues
Perform planned network maintenance during change windows