Job Title: DNS Test Engineer
Experience: 5 years and above

Location: PAN India

Job Description:

Job Summary

We are looking for a highly skilled DNS Test Engineer with solid experience in DNS protocol testing, DNSSEC validation, network troubleshooting, and test automation. The candidate will be responsible for validating DNS functionality, performance, reliability, and security across enterprise-scale DNS environments.

Key Responsibilities

- Design, develop, and execute test plans and test cases for DNS products and services.
- Perform Functional, Integration, Regression, System, API, and Performance Testing.
- Validate DNS resolution, recursion, forwarding, caching, and authoritative DNS behavior.
- Conduct DNSSEC testing, validation, and troubleshooting.
- Perform packet-level analysis using Wireshark, tcpdump, and PCAP tools.




- Execute DNS performance and scalability testing using dnsperf and resperf.
- Automate test scenarios using Python and Shell scripting.
- Analyze defects, perform root cause analysis, and work closely with development teams.
- Validate DNS over HTTPS (DoH) and DNS over TLS (DoT) functionality.
- Work in Agile environments and contribute to continuous quality improvements.

Required Skills :

- DNS Testing & DNSSEC
- DNS Protocols (DNS, DoH, DoT)
- TCP/IP & Networking Fundamentals
- Python Automation
- Wireshark, tcpdump, dig, nslookup
- dnsperf, resperf
- Functional, Regression & Performance Testing
- API Testing

Thanks and Regards,

Md Shahid, TCS

📌 DNS Test Engineer (Telangana)
🏢 Tata Consultancy Services
📍 Telangana