Network Architect (L4)

HCLTech is seeking a seasoned Network Reliability Engineer (NRE) with deep expertise in designing, operating, and optimizing hybrid & cloud network environments. You will focus on ensuring high availability, scalability, performance, and resilience of enterprise networks spanning on-premises data centers, SD-WAN, ACI, and major cloud platforms (AWS, Azure). This role combines network engineering with Reliability Engineering principle, emphasizing automation, observability, proactive incident prevention, and rapid recovery to meet stringent SLAs for mission-critical applications.

Responsibilities

Design and implement highly reliable network infra.

Define and track Service Level Objectives (SLOs), Service Level Indicators (SLIs) and error budgets.

Lead major incident response, root cause analysis (RCA), and post-mortem reviews.

Implement blameless post-mortems and drive corrective actions to prevent recurrence.

Build automation scripts, tools, and self-healing mechanisms for network provisioning, configuration management, monitoring, and failover.

Develop and maintain comprehensive dashboards, alerts, and logging using tools like Prometheus, Django, Grafana, Datadog, Splunk etc.

Conduct network capacity planning, performance tuning, and chaos engineering to validate resilience.

Collaborate on network security posture, zero-trust models, firewall policies, and compliance requirements.

Work with DevOps, SRE, Cloud, Security, and Application teams to embed reliability into the development lifecycle.

Guide junior engineers and contribute to knowledge sharing within the global team.

Requirements

Bachelor Degree in Computer Science, Engineering, or related field (or equivalent experience).

Preferred CCIE and/or CCNP certification Core Networking

Deep expertise in Routing (BGP, OSPF, EIGRP), Switching (STP, VLANs, VXLAN), Firewalls, Load Balancers, VPNs, and SD-WAN.

Strong troubleshooting of complex Layer 2/3/4 issues.

Experience applying SRE principles (error budgets, toil reduction, automation).

Proficiency in scripting (Python) and Infrastructure as Code (Terraform, Ansible, etc.).

CI/CD & Automation - Jenkins, GitOps, Ansible.

Packet analysis: Wireshark, tcpdump.

Excellent problem-solving, communication, and stakeholder management

Ability to work in a global, 24x7 on-call rotation.

Must Have Skills

Site Reliability engineering (SRE)

Network Design and Engineering

Cisco Application Centric Infrastructure (ACI)

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