Tata Communications
Website:
tatacommunications.com
Job details:
About The Company
Tata Communications Redefines Connectivity with Innovation and IntelligenceDriving the next level of intelligence powered by Cloud, Mobility, Internet of Things, Collaboration, Security, Media services and Network services, we at Tata Communications are envisaging a New World of Communications
Job Description
Network Operations & Support - Linux firewall engineer
Experience: 6-8 Years
Location: Chennai/Bangalore
Role Summary
We are looking for a skilled Distributed Perimeter (Linux Firewall Engineer) to design, build and operate secure Linux‑based perimeter controls. The role requires strong hands‑on experience with NixOS, nftables and proxy technologies, along with modern networking, container networking, and security observability tools such as Cilium, Suricata, and Zeek. The engineer will be responsible for implementing declarative, scalable, and security‑focused Linux infrastructure.
Key Responsibilities
- Install, configure, and maintain Linux systems in production environments
- Design and implement distributed perimeter security using Linux firewall and proxy technologies
- Build and manage systems using NixOS (MUST) with declarative configuration principles
- Implement and troubleshoot Linux firewall rules using nftables (MUST)
- Deploy, configure, and manage proxy solutions, including:
- Enforce inbound and outbound traffic control using firewall and proxy policies
- Deploy and support Cilium for container networking, security, and observability
- Configure and operate network security and visibility tools, including:
- Suricata (IDS/IPS)
- Zeek (network traffic analysis)
- Monitor system and network behavior, troubleshoot incidents, and perform root‑cause analysis
- Ensure system hardening, security compliance, and best practices
- Collaborate with Security, Platform, and DevOps teams on perimeter and network security improvements
- Document firewall rules, proxy configurations, and operational procedures
Mandatory Skills & Experience
- 4+ years of hands‑on Linux administration / engineering experience
- Strong experience with NixOS (MUST)
- Strong hands‑on experience with nftables (MUST)
- Hands‑on experience with Squid Proxy (MUST)
- Experience working with Sproxy
- Strong understanding of Linux networking fundamentals (TCP/IP, routing, packet flow)
- Experience implementing firewall‑ and proxy‑based security controls in production
- Good troubleshooting and incident handling skills
Required / Core Skills
- Experience with Cilium for container networking and security
- Familiarity with Suricata for intrusion detection/prevention
- Familiarity with Zeek for network traffic analysis and visibility
- Understanding of distributed or zero‑trust perimeter concepts
- Scripting skills (Bash required; Python preferred)
Preferred Skills
- Experience with Kubernetes or containerized environments
- Exposure to observability, logging, or SIEM integrations
- Experience working in high‑availability or large‑scale Linux environments
- Security‑focused Linux deployments
Other Qualification And Requirement
Any degree or relevant education is must. This role requires working at customer locations based on business needs.
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