Nabanjan Das  – Lead QA Automation Engineer | SDET Architect | QE Leader – [Skills- Playwright,Python, Appium, Cypress] – 13+ years Exp

PROFESSIONAL SUMMARY

• Lead QA Automation Engineer with 13+ years of experience delivering scalable test solutions across FinTech, E-commerce, and cloud platforms
• Specialized in building end-to-end automation frameworks (UI, API, performance) and integrating them into CI/CD pipelines.
• Strong programming background in Python, Java, JavaScript/TypeScript, Go, and Scala
• Extensive experience integrating automation into CI/CD pipelines (Jenkins) to support continuous delivery
• Led distributed QA teams (onshore and offshore), driving quality initiatives and release execution
• Experienced in designing test strategies, improving automation coverage, and stabilizing large test suites
• Worked on performance and load testing using Gatling and JMeter in high-scale environments
• Familiar with cloud platforms (AWS, GCP) and containerized environments (Docker, Kubernetes)
• Comfortable working in Agile environments and collaborating with cross-functional teams
• Consistently focused on improving release quality, reducing manual effort, and speeding up delivery cycles

CORE SKILLS

Languages: Python, Java, Go, Scala, C#, JavaScript, TypeScript
Automation: Playwright, Cypress, Selenium, Appium, WebdriverIO
API Testing: Rest Assured, Postman, PyTest, Django
Performance: Gatling, JMeter
Frameworks: BDD, Cucumber, TestNG, JUnit
Cloud/DevOps: AWS (EC2, S3), GCP, Docker, Kubernetes, Jenkins
Databases: PostgreSQL, MySQL, Oracle
Tools: Jira, Zephyr, Git, Kibana, Grafana, Wireshark

 

PROFESSIONAL EXPERIENCE

Mastercard, Inc. – O’Fallon, MO   

Lead Software QA Consultant                                                          May 2025 – Present

• Led QA efforts across distributed teams (onshore/offshore), improving release coordination and delivery efficiency
• Owned QA for the Stand-In transaction processing system, ensuring uninterrupted payment processing during issuer downtime
• Built a Playwright-based UI automation framework enabling parallel execution across browsers, reducing regression time by ~40%
• Developed backend API automation using Java and Spring Boot to improve service-level coverage
• Integrated automated tests into Jenkins pipelines to support continuous validation
• Worked closely with development teams in Agile cycles to ensure timely delivery
• Coordinated work across onshore and offshore QA teams for releases

Technologies: Java, Spring Boot, Playwright, Cypress, JavaScript, TypeScript, Jenkins, Postman, PostgreSQL, Oracle, BDD, Cucumber

 

CarParts.com – Livermore, CA

Lead Software QA Consultant                                                        Feb 2024 – Mar 2025

• Supported QA for a large-scale e-commerce platform rebuild
• Migrated UI automation to Playwright and Cypress, improving test execution speed and reducing flaky tests
• Designed and implemented an automation framework using Java, Selenium, and TestNG
• Built reusable, data-driven testing components to simplify regression coverage
• Worked on API validation and integrated tests into CI/CD workflows
• Ensured browser compatibility across multiple environments using Selenium Grid
• Reduced regression cycle time by improving automation coverage and stability

Technologies: Java, Selenium, TestNG, Playwright, Cypress, JavaScript, Jenkins, Postman, Jira

 

Topcon – Livermore, CA     

Lead Software QA Consultant                                                        Jun 2023 – Jan 2024

• Led QA and automation for embedded positioning systems and related applications
• Built Python and shell-based scripts to support deployment and testing workflows
• Developed UI automation using Selenium and later migrated parts of the framework to Cypress
• Implemented proxy-based solutions to enable UI testing without backend dependencies
• Integrated automation into CI/CD pipelines to streamline releases
• Assisted in debugging issues within embedded C/C++ components

Technologies: Python, Shell scripting, Java, Selenium, Cypress, AWS EC2, Django, Jenkins, C/C++, CMake, Wireshark

 

Meta – Menlo Park, CA

Software Consultant                                                                         Jan 2023 – May 2023

• Developed internal tools using Python and shell scripting to support operational workflows
• Automated UI testing for dashboards used by the Operational Data Store team
• Helped improve efficiency in data validation and reporting processes

Technologies: Python, Java, Selenium, Bash, JUnit

 

Grid Dynamics (Apple Client) – San Ramon, CA

Staff Test Automation Engineer (Lead)                                         Sep 2021 – Sep 2022

• Mentored engineers, conducted code reviews, and drove adoption of standardized automation practices across teams
• Built frameworks for end-to-end testing, including performance testing using Gatling (Scala) and Go
• Designed automation architecture across multiple projects supporting UI, API, and performance testing at scale
• Developed test suites using Selenium, Rest Assured, and BDD tools
• Deployed test environments on AWS (EC2, S3)
• Improved test execution efficiency and scalability across multiple projects

Technologies: Java, Scala, Go, Selenium, Cypress, Rest Assured, TestNG, JUnit, Gatling, AWS, Docker, Kubernetes

 

Equinix- Sunnyvale, CA

Staff Software Quality Engineer (Lead)                                            Jul 2020 – Jul 2021

• Led QA automation efforts for Cloud Exchange Fabric rollout
• Built and maintained scalable UI and API automation frameworks
• Worked within AWS-based environments to support testing at scale
• Participated in planning, backlog refinement, and sprint execution

Technologies: Java, Selenium, Cypress, BDD, Cucumber, AWS, Docker, Kubernetes

 

Egnyte- Mountain View, CA

Staff Software Quality Engineer (Lead)                                       Apr 2019 – June 2020

• Worked on Smart Cache product to improve enterprise file synchronization performance
• Enhanced system performance visibility through monitoring and automation
• Built end-to-end automation for both web and desktop applications
• Designed performance testing solutions using JMeter
• Used Grafana and Kibana for monitoring and debugging

Technologies: Python, Go, Docker, Kubernetes, JMeter, AWS, GCP, Grafana, Kibana

 

Conviva – Foster City, CA

Senior Test Automation Engineer                                                 Jun 2017 – Feb 2019

• Developed scalable automation frameworks using Python and Java
• Automated both UI and API testing workflows
• Contributed to backend scalability improvements using distributed architecture

Technologies: Python, Django, Java, Selenium, AWS EC2/S3, Kubernetes, Jenkins

 

Walmart Labs- Sunnyvale, CA

Senior Automation Engineer (Lead)                                              Feb 2017 – May 2017

• Worked on automation for payment systems (Wangea platform)
• Built test cases and automation using Java and Selenium

 

GE Digital – San Ramon, CA

Senior Automation Engineer (Lead)                                              Jun 2016 – Jan 2017

• Developed automation frameworks for IoT platform (Predix)
• Used Selenium with Protractor and BDD (Cucumber) for end-to-end testing

Technologies: Java, Selenium, Protractor, Cucumber, Maven

 

 

Instart Logic – Palo Alto, CA

Member of Technical Staff                                                              Apr 2014 – Apr 2016

• Worked on performance optimization systems for enterprise web applications
• Developed automation frameworks using Java, JavaScript, and Node.js
• Built CI/CD pipelines using Jenkins and Docker
• Implemented browser and mobile automation using Selenium and Appium
• Contributed to backend and proxy-based systems for improving page load performance

Technologies: Java, Selenium, Appium, Node.js, JavaScript, TypeScript, Docker, Jenkins, Python

 

Riverbed Technology – San Francisco, CA

Member of Technical Staff                                                              Apr 2012 – Apr 2014

• Built end-to-end automation infrastructure using C# and Selenium
• Worked on performance and robustness testing for web optimization products
• Designed tools to run large-scale automated testing across thousands of websites
• Contributed to backend API validation and system-level testing

Technologies: C#, C++, Selenium, Bash, Pycurl

 

EDUCATION

M.S. Computer Engineering
Santa Clara University (GPA: 3.8)

B.S. Computer Science & Engineering
IIT Kanpur

 

 

 

AWARDS & PATENTS

• Patent: Method for facilitating cell placement in IC design
• TCS Best Project Award
• SUN Microsystems ATTA Award