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Quality Assurance Engineer - Test Automation

Transaction Network Services Kolkata, West Bengal, India

onsitefull-time
Posted May 14, 2026Apply by Jun 13, 2026

**Role & seniority: ** QA Engineer / Software Test Engineer (Senior); 5+ years testing, with ≥5 years UNIX/Linux client-server testing experience.

**Stack/tools: ** UNIX/Linux, UNIX shell scripting; Python or Perl; REST API testing; Git/SVN; Jenkins (desired); JIRA (desired); automation/regression tooling; protocol familiarity incl. SIP/SS7 (ISUP)/TCAP/ENUM; (desired) MGTS, SIPP; (desired) code coverage tools.

**Top 3 responsibilities: **

  1. Develop and execute test strategies/scenarios for telephony/telecom applications and infrastructure.

  2. Build and maintain automated regression test suites; create tests, defect reports, and test documentation per team standards.

  3. Collaborate in Scrum/Agile to deliver quality; coordinate with operations for deployment readiness in production.

  • Must-have skills:

    • Test automation using Python/Perl/UNIX scripting.

    • UNIX/Linux testing (installation/configuration, troubleshooting, load/performance).

    • Protocol knowledge: SIP and SS7 (ISUP) and/or TCAP/ENUM.

    • REST API testing capability.

    • Strong communication; ability to create test plans/reports and estimate tasks.

  • Nice-to-haves:

    • VoIP-focused telecom experience.

    • Protocol testing tools: MGTS, SIPP.

    • Jenkins build integration; code coverage tools.

    • Agile/defect tools: JIRA.

  • Location & work type: Not specified in provided text.

Full Description

An extraordinarily talented group of individuals work together every day to drive TNS' success, from both professional and personal perspectives. Come join the excellence!

Overview

Looking for a candidate with strong technical skills to develop and execute test strategies for telecom related programs. The QA engineer will be responsible for working with other scrum team members to help develop, execute and automate test cases based on a published set of technical requirements. The candidate preferably has an understanding of the telecommunications domain and can work as part of a high performing scrum team in a fast-paced agile environment.

Responsibilities

Responsibilities

Develops and executes test strategies/scenarios for telephony network applications/infrastructure. Develops and maintains automated regression test suites. Works as part of a scrum team in an agile environment. Works with operations to ensure smooth software deployments in production. Possesses the ability to work with minimal supervision and/or independently. Utilizes experience and judgment to plan and accomplish goals. Writes or modifies scripts in Python, Perl or UNIX to automate repetitive tests. Creates tests and defect reports using the team standards and best practices.

Experience Required

5+ years overall test experience developing and automating test cases. Minimum 5 years software testing experience of UNIX or Linux client server applications, including testing application installation/configuration, trouble shooting and load/performance. Experience in SIP, SS7(ISUP), TCAP and/or ENUM protocols. Experience writing UNIX shell, Perl or Python scripts Experience in RestAPI testing. Experience with software version control such as GIT and/or SVN. Ability to create high level and detailed test plans and test reports. Thorough understanding of test processes and ability to estimate task duration.

Excellent written and verbal communication skills

Qualifications

Experience Desired

Experience in a telecommunications environment focusing on VoIP. Experience in protocol testing tools such as MGTS, SIPP. Experience in RestAPI testing. Experience with build integration tools such as Jenkins. Experience with code coverage tools. Experience with defect and agile management tools such as JIRA.

Education Qualifications

BS/MS degree in Computer Science or related field.

If you are passionate about technology, love personal growth and opportunity, come see what TNS is all about!

TNS is an equal opportunity employer. TNS evaluates qualified applicants without regard to race, color, religion, gender, national origin, age, sexual orientation, gender identity or expression, protected veteran status, disability/handicap status or any other legally protected characteristic.

Test AutomationTelecommunicationsAgilePythonPerlUNIXSIPSS7TCAPENUMRestAPIGITSVNJIRALoad TestingPerformance Testingmulti-location

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