Api Testing Performance

Hemalatha Sangi

Phone: +1-571-***-**** Email: *****.*********@*****.***

PROFESSIONAL SUMMARY

• 6 years of experience in Telecommunications, and Technology domains.

• Having strong background in both manual and automated testing of web and mobile applications. Proficient in using tools such as Selenium WebDriver/IDE/Grid, TestNG, and REST, Assured for end-to-end automation and API testing.

• Skilled in various testing methodologies including Functional, Regression, Integration, System, End-to-End, GUI, and User Acceptance Testing (UAT).

• Expert in backend validation and writing complex SQL queries, joins, and stored procedures using Oracle and MySQL. Experienced with API testing using REST Assured, Postman, and SOAP UI for both RESTful and SOAP web services.

• Proficient in performance testing including throughput, latency, jitter, and packet loss analysis using tools like iPerf3, Wireshark, and PingPlotter.

• Proficient in test planning, test case creation, and requirements traceability using tools like JIRA, HP ALM (Quality Center), and Jenkins for continuous integration and delivery (CI/CD). Experienced with Maven for dependency management and Jenkins for automated build and test execution.

• Experienced in backend testing, data validation, and automation using Python, SQL, and REST APIs.

• Solid understanding of QA methodologies and defect lifecycle; experienced with tools like Selenium, Postman, JMeter, and PyTest.

• Led QA efforts for the POSBE Migration project, including regression testing, order processing validation, and API-driven trade-reversal testing.

• Proficient in application monitoring, debugging, and log analysis using Kibana, and Python-based tools.

• Strong experience in performance testing and system optimization in cloud-based environments using AWS (EC2, S3, EMR).

• Collaborated with cross-functional teams to identify and resolve defects, ensuring high application reliability and performance.

• Skilled in triaging production issues and collaborating with teams to drive timely resolutions.

• Strong analytical, problem-solving, and communication skills with a focus on delivering high-quality software solutions and understanding of SDLC and Agile/Waterfall methodologies.

TECHNICAL SKILLS

• Programming Languages: Python, Java, JavaScript, SQL, Bash

• Web Technologies: Django, Flask, REST APIs, Postman, Swagger, GraphQL, HTML, CSS, Bootstrap

• Databases: MySQL, PostgreSQL, Redis, Cassandra, MongoDB

• Cloud & DevOps: AWS (EC2, S3, EMR, SQS), Jenkins, Docker, Kubernetes, Linux

• Big Data & Analytics: Hadoop, Spark, PySpark, Hive, Tableau, Kibana, Anaconda

• Tools & Frameworks: Jira, Git, Splunk, Pyspark, NumPy, Pandas, SciPy, Selenium, Cucumber

PROFESSIONAL EXPERIENCE

Verizon Wireless (Sep 2021 – Jan 2025)

Role: Networking Engineer

Responsibilities:

POSBE Migration Project:

• Led end-to-end regression testing across Assisted (Retail, Telesales) and Digital Channels in QA1-4 environments, ensuring seamless order processing for Preorders, Backorders, and Regular Devices.

• Leveraged PEGA and CXP Kibana to extract, analyze, and validate E2E order logs, optimizing troubleshooting efficiency.

• Validated order status and activation success using Activation Checker, identifying failures and ensuring prompt resolutions.

• Monitored and optimized order movement using Order Journey Tool, ensuring seamless E2E order processing.

• Validated Wi-Fi security features, including WPA2/WPA3 encryption, EAP authentication, captive portal access, and vulnerability scans.

• Conducted backend validations in NSA and POS Cassandra DB, verifying success flags and reducing processing errors.

• Spearheaded fulfillment testing for indirect channels, ensuring AAL, EUP, NSE, Trade-in (ICTIN/NICTIN), SSD, ACC, FEA, CPC workflows met business requirements.

• Developed API test cases using Postman, executing and debugging trade-reversal journeys for order reversals and fulfillment accuracy.

• Tested AP-client interoperability across multiple devices (Windows, Android, iOS, IoT) to ensure seamless connectivity and stability.

• Performed stress and load testing by simulating high client density and monitored access point resilience and packet loss.

• Identified and resolved defects in the order processing systems, improving backend workflows and reducing order fallouts by ensuring accurate data transmission.

• Staging & Prod Support – L1

• Developed and automated Python-based tools to streamline application support, debugging, and performance monitoring.

• Executed complex SQL queries to extract, analyze, and validate large datasets, ensuring database integrity and system efficiency.

• Diagnosed and resolved application failures by analyzing logs in Redis, Stage-o-rama, and Kibana, improving incident resolution time.

• Spearheaded system upgrades, patch deployments, and configuration management to maintain application stability.

• Provided root cause analysis for all P1 issues assigned and worked with development teams to fix issues.

• Enhanced debugging capabilities using JS, reducing troubleshooting efforts and improving system monitoring.

• Analyzed logs and packet captures to troubleshoot connection issues and optimize signal quality.

• Simulated various environments (e.g., low signal, interference, congestion) to assess real-world Wi-Fi performance.

• Collaborated with firmware, hardware, and software teams to report bugs and verify fixes in wireless modules.

• Optimized backend workflows by analyzing application interactions, database transactions, and API performance.

• Analyze log messages to assess their impact on various system functionalities and troubleshooting the production issues.

• Automated Wi-Fi test cases using scripting (Python/Shell) and integrated them into CI/CD pipelines.

• Monitored production environments to quickly identify and resolve JavaScript-related issues, including performance.

• Documented defects in JIRA with reproducible steps, logs, PCAPs, and severity levels; collaborated closely with developers and network engineers to resolve issues.

Apple Inc. (Feb 2020 – Aug 2021)

Role: Python Developer – Austin, Texas

Responsibilities:

• Developed and optimized Python Django applications for data processing and business logic.

• Designed and implemented RESTful APIs using Django REST Framework.

• Performed failure debugging and root cause analysis using Python scripts.

• Worked on data integration and visualization with GraphQL, PySpark, and Tableau.

• Implemented automation scripts for security applications deployed in Docker environments.

• Created and executed test plans and test cases for Wi-Fi features in agile development environments, ensuring coverage and traceability.

• Wrote SQL queries for managing data integrity in PostgreSQL and Docker SQL LDAP.

• Managed version control and CI/CD pipelines using Git and Jenkins.

• Performed regression testing and automated functional validation for Python-based web applications using Selenium WebDriver.

• Collaborated with DevOps teams to integrate test automation into deployment workflows, improving release stability and code quality.

• Writing SQL Queries in python for various modules of my application for different Security functionalities.

• Deployed Security application, DB, Cache on Docker Containers with LDAP’s and accessing them with Docker Desktop.

EDUCATION

Master’s in Information Technology – Cyber Security

University of the Potomac, Jan 2018 – June 2019

Master’s in Computer and Information Science

American College of Commerce and Technology, Jan 2016 – Dec 2017

Bachelor’s in Electronics and Communication Engineering

Jawaharlal Nehru Technological University, 2011 – 2015

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