Network Engineer L3

Si2 Tech; Bengaluru; On-site; INR 900,000 - 1,300,000; Full time

Job summary

Si2 Tech in Bangalore is seeking a Network L3 Engineer to maintain, troubleshoot, and optimize our advanced network infrastructure for our client(s). The role requires deep knowledge of routing, switching, firewalls, and network design across multi-vendor environments.

The candidate will work onsite with rotational shifts, 6-8 years of experience, and a strong ability to analyze packet captures, diagnose complex issues, and implement scalable solutions that enhance performance and security.

Qualifications

• Bachelor’s degree in computer science, Information Technology, or a related field.
• 5+ years of experience in network engineering or a related technical field, with at least 2 years in an L3 support role.
• Relevant industry certifications such as CCNP, JNCIP, ITIL or equivalent are highly preferred.

Responsibilities

• Hands-on experience on Network Technologies – Routing, Switching, Firewall, Load Balancers, Wireless Network.
• Experience on Network designing, Architecting, Troubleshooting, Integrations.
• Ability to troubleshoot complex issues within defined timelines.
• Strong expertise in core and edge IP routing technologies (IPv4 and IPv6, BGP, OSPF, MPLS– RSVP, LDP, etc.).
• Hands-on experience on Cisco Nexus, ASR/ISR, SDN, SD-WAN, IPSEC, SWITCHING.
• Hands-on experience on Network & Server Load Balancer, Wan Optimization devices.
• Hands-on experience on Next-Gen Firewalls like Palo Alto, Cisco FP features

Skills

Advanced Networking Protocols

Network Design

Firewall & Security

Load Balancing & Redundancy

Network Monitoring

Core Data Center Skills

Routing & Switching

Data Center Technologies

Security & Segmentation

Education

Bachelor's degree

Tools

Wireshark

SolarWinds

Nagios

PRTG

Cisco Nexus

ACI

Juniper QFX

Arista

Job description

Job Title:Network L3 Engineer

Location:Bangalore

Job Type:Permanent / Full - Time | Onsite (Work from Office)

Department: IT Infrastructure

Shift: Rotational Shifts

Experience: 6-8Years

Role Summary:
The Network L3 Engineer will be responsible for maintaining, troubleshooting, and optimizing our advanced network infrastructure for our client(s). This role requires a deep understanding of networking protocols, strong problem-solving skills, and the ability to work under pressure to resolve complex network issues. The ideal candidate will have hands-on experience with multi-vendor network equipment, excellent communication skills, and a proactive approach to continuous improvement. Must have Core Technical Skills

1. Advanced Networking Protocols: Deep understanding of TCP/IP, BGP, OSPF, EIGRP, MPLS, ISIS. Routing and switching concepts at an expert level
2. Network Design and Architecture: Experience designing scalable, high-availability network infrastructures. Capacity planning and performance optimization
3. Firewall and Security: Proficient with firewalls (e.g., Palo Alto, Fortinet, Cisco ASA). VPNs (IPSec, SSL), ACLs, NAT, IDS/IPS
4. Load Balancing and Redundancy: Knowledge of F5, Citrix NetScaler, or similar appliances. HA protocols like HSRP, VRRP, GLBP
5. Network Monitoring and Troubleshooting: Tools: Wireshark, SolarWinds, Nagios, PRTG
6. Strong analytical skills for packet capture analysis. Core Data Center Network Skills.

Good to have Core Technical Skills

1. High-Level Routing & Switching: Deep understanding of Layer 2/3 protocols: STP, VTP, HSRP, VRRP, BGP, OSPF, VXLAN. Fabric Path, OTV, and other data center-specific technologies
2. Data Center Network Design: Spine-leaf architecture. Layer 2/3 segmentation and scalable designs. Multitenancy (VRF, VLANs, overlay/underlay networks).
3. Data Center Technologies: Cisco Nexus (5k/7k/9k) platforms. ACI (Application Centric Infrastructure). Juniper QFX/EX, Arista platforms. EVPN/VXLAN for modern data center fabrics
4. Security & Segmentation: Micro segmentation (e.g., using Cisco ACI or NSX). Integration with firewalls and network access control (NAC)

Key Responsibilities:

• Hands-on experience on Network Technologies – Routing, Switching, Firewall, Load Balancers, Wireless Network.
• Experience on Network designing, Architecting, Troubleshooting, Integrations.
• Ability to troubleshoot complex issues within defined timelines.
• Strong expertise in core and edge IP routing technologies (IPv4 and IPv6, BGP, OSPF, MPLS– RSVP, LDP, etc. / VPLS / VPWS, IP VPN, QoS, Security)
• Hands-on experience on Cisco Nexus, ASR/ISR, SDN, SD-WAN, IPSEC, SWITCHING.
• Hands-on experience on Network & Server Load Balancer, Wan Optimization devices.
• Hands-On experience on Next-Gen Firewalls like Palo Alto, Cisco FP features
• Knowledge of VPN, MPLS, ILL, L2/L3 Circuits configuration/Troubleshooting’s.

Candidate Requirements:

• Bachelor’s degree in computer science, Information Technology, or a related field.
• 5+ years of experience in network engineering or a related technical field, with at least 2 years in an L3 support role.

Certifications: Relevant industry certifications such as CCNP, JNCIP, ITIL or equivalent are highly preferred.