Test Engineer

To ensure the quality, reliability, performance, and stability of enterprise Contact Center applications through comprehensive functional, integration, API, automation, regression, and performance testing.

The role requires hands-on expertise in testing VoIP-based Contact Center solutions, including Asterisk, FreeSWITCH, Kamailio, inbound/outbound dialers, IVR, Voice Bots, CRM integrations, and REST APIs.

Responsible for designing and executing test strategies, identifying defects, validating end-to-end calling workflows, and ensuring production readiness of Contact Center applications supporting high-volume business operations.Duties and Responsibilities

Functional Testing

• Perform functional, regression, integration, and end-to-end testing.

• Validate inbound/outbound calling, campaign management, IVR, and call routing.

• Test agent login, call transfer, conference, disposition, callback, and rechurn functionalities.

VoIP & Dialer Testing

• Test Asterisk, FreeSWITCH, Kamailio, and SIP-based applications.

• Validate SIP trunking, call connectivity, call recording, and voice quality.

• Identify call failures, audio issues, and telephony defects.

API & Database Testing

• Perform REST API testing using Postman.

• Validate integrations between Dialer, CRM, Voice Bot, and other applications.

• Perform database validation using SQL, PostgreSQL, and MySQL.

• Validate CDR, disposition, reporting, and data accuracy.

Automation & Performance Testing

• Develop and execute automation test scripts using Selenium, Playwright, or Python.

• Perform load and performance testing using JMeter.

• Validate concurrent calls, CPS, dialing throughput, and application response times.

Defect & Release Management

• Identify, report, and track defects through closure.

• Coordinate with development teams for issue resolution.

• Support SIT, UAT, production deployment, and regression testing.

• Prepare test cases, execution reports, and QA sign-off recommendations.Key Decisions / Dimensions

• Experience with Asterisk, OpenSIPS, or other VoIP platforms.

• Knowledge of WebRTC and real-time communication technologies.

• Familiarity with REST APIs and their integration with VoIP systems.

• Exposure to testing frameworks for end-to-end testing.|Key numerical data which will reflect the scope and scale of activities concerning this job)

• Define testing scenarios and test coverage.

• Identify and prioritize defects based on severity.

• Recommend application readiness for production deployment.

• Suggest improvements in testing processes and automation.

• Escalate critical defects and quality risks.Major Challenges

# Challenge Description

1 Application Quality Ensure stable and defect-free application delivery.

2 High Call Volume Validate performance during high concurrent calling.

3 VoIP Testing Identify call failures and voice quality issues.

4 Integration Testing Ensure smooth integration across CRM, Dialer, and Voice Bot.

5 Automation Reduce manual testing through automation.

6 Release Timelines Complete testing within planned release timelines.

7 Production Stability Minimize production defects and recurring issues. Required Qualifications and Experience

a) Minimum qualification required is BE/B-Tech/ Computer Science / IT and electronics with an Implementation

BE/B.Tech in Computer Science, IT, Electronics, or a related field.

Experience

• 3+ years of experience in Software QA and Testing.

• Experience in Contact Center, Dialer, Telecom, or VoIP applications preferred.

• Experience in automation and API testing.