DIPAYAN DAS
Kolkata
Summary
Dipayan is an IT professional with a combined industry experience of above 12 years with expertise in performance testing of web-based applications, Cloud Performance Testing (Azure), SOAP-based web services, Microservices and mainframe (RF scanner) applications using industry-leading tools like OpenText LoadRunner , Apache JMeter, JMeter-Jenkins CI/CD integration for report generation etc.
Results-driven Performance Tester with ability to swiftly identify and resolve system bottlenecks, ensuring optimal software performance. Specialize in load testing, automation scripting, and performance analysis tools. Utilize strong analytical skills, adaptability, and problem-solving capabilities to enhance system reliability and efficiency under varying conditions. Excel in collaborative environments by leveraging communication and teamwork skills.
- Firsthand experience of using monitoring tools/utilities such as Dynatrace, Azure Insights, Splunk, Java VisualVM, etc. to analyze performance metrics and identify bottlenecks.
- Accustomed to working within Agile and Scrum methodologies while monitoring performance, reviewing processes, and recommending updates.
- Worked extensively on Test Planning and Strategy, Effort Estimation etc.
Overview
12
12
years of professional experience
Work History
Lead Performance Tester
Tata Consultancy Services
08.2019 - Current
- Supervising NFT activities of all applications of a couple of towers of a renowned Retail group.
- Developed performance testing scripts to simulate real-world usage scenarios.
- Created detailed test plans and test cases for functional and non-functional requirements.
- Analyzed system performance metrics such as response time, throughput, resource utilization.
- Generated comprehensive reports with graphical representation of results from performance tests.
- Collaborated with development teams in resolving identified issues during testing process.
- Designed web scripts and complex logic using OpenText LoadRunner, Apache JMeter, Neoload.
- Worked in both Waterfall and Agile methodologies, and also have experience in Azure Cloud Performance Testing, etc.
- Have performed Load/Stress/Endurance testing on Web Application, Web services, Mainframe, and microservices.
- Worked on non-functional requirement gathering, test strategies, effort estimation, etc.
- Used monitoring tools such as Dynatrace, Splunk, Kubernetes, Tivoli, etc. to identify bottlenecks.
- Coordinated end-to-end testing of multiple applications, where data processing starts from an eCommerce and logistics application all the way to store apps, while processing data via an integration layer.
- Used SQL DB to create and gather test data, as well as conduct DB performance testing.
Performance Test Analyst
Cognizant Technology Solutions
06.2012 - 07.2019
- Have performed Load/Stress/Endurance testing on Web Application.
- Experienced in performance testing of web-based applications and SOAP-based web services using industry-leading tools like HP LoadRunner/Performance Center and Apache JMeter.
- Have worked in performance testing engagements with customers across industry domains such as Banking, Financial Services, Airlines, Real Estate, and Media.
- Experienced in handling performance projects end-to-end, from test plan to closure report.
- Have worked in Performance Testing projects as an independent resource as well as a lead.
- Experienced in analyzing web application's server-side and database bottlenecks using tools like Dynatrace and Foglight.
- Performed an active role in suggesting ideas to the customer towards filling the existing gaps and improving the process and technical solutions in performance testing the application.
- Have worked on several POCs and issues and provided a good solution to the team.
Education
B. Tech - Computer Science
NIT Agartala
01-2012
12th - Science
Ramakrishna Mission Vidyalaya
01-2008
10th -
Bharatiya Vidya Bhavan
01-2006
Skills
Performance Testing Tool
- OpenText LoadRunner
- Apache JMeter
- Neoload
Profiling and Monitoring Tools
- Dynatrace
- Splunk
- Java VisualVM
- PerfMon
- Azure Insights
Defect Tracking Tool
- Jira
Proxy Tools Used
- Fiddler
Protocols
- Web (HTTP/HTML)
- Web Service
- Ajax TruClient
- RTE
- ODBC
CERTIFICATIONS
- ISTQB Foundation Level
- Microsoft Azure AI-102
- Microsoft Azure AZ-900
REPRESENTATIVE PROJECT EXPERIENCE
PROJECT #1
Duration Aug 2019 – Till Date
Location Kolkata, India
OS Windows
Tools OpenText Load Runner, Apache JMeter v5.0
Application Web based, Web Service, Mainframe etc.
PROJECT DESCRIPTION:
The customer is a British supermarket chain. It consists of 5 major towers which have multiple applications under each tower. The performance test usually gets conducted End-to-End where data/messages get processed between multiple towers which comprises of various applications. Testing is usually done on a shared environment which is being utilized by multiple teams daily. This is a significant challenge which is taken care of during NFT activities.
ROLES AND RESPONSIBILITIES:
➢ Non-functional Requirement gathering, Test strategy, Effort Estimation, Workload Modelling.
➢ Development of Performance test scripts
➢ Co-ordination between Project, DB, Environment team for test data creation
➢ Designing and development of Workload mix
➢ Execution of Test scripts
➢ Monitoring the Server side counters
➢ Analysis of test results
➢ Test report preparation
PROJECT #2
Duration Aug 2017 – July 2019
Location Kolkata, India
OS Windows
Tools OpenText Load Runner, JMeter, Neoload
Application Web based, Web Service, RTE etc.
PROJECT DESCRIPTION:
The customer is a bank holding company. The main performance testing objectives were to test various applications and find out the Maximum User Load supported by the business-critical scenarios and to ensure that they meet the SLA defined for the application. Also, to measure performance of the servers and ensure they perform optimally when subjected to peak load.
ROLES AND RESPONSIBILITIES:
➢ Non-functional requirements understanding and Identifying Scope
➢ Effort Estimation
➢ Test strategy, Test Plan Development
➢ Development of Performance test scripts
➢ Co-ordination between Project and DB team for test data creation
➢ Execution of Test scripts
➢ Monitoring the Server side counters
➢ Analysis of test results
➢ Test report preparation
PROJECT #3
Duration Jul 2015 – Jun 2017
Location Kolkata, India
OS Windows
Tools OpenText Load Runner, Apache JMeter v5.0
Application Citrix, Ajax TruClient etc.
PROJECT DESCRIPTION:
It’s an Airline-based client. The main performance testing objectives were to test various applications and find out the Maximum User Load supported by the business-critical scenarios and to ensure that they meet the SLA defined for the application. Also, to measure performance of the servers and ensure they perform optimally when subjected to peak load.
ROLES AND RESPONSIBILITIES:
➢ Non-functional requirements understanding
➢ Development of Performance test scripts
➢ Designing and development of Workload mix
➢ Execution of Test scripts
➢ Monitoring the Server side counters
➢ Analysis of test results
➢ Test report preparation
PROJECT #4
Duration Jan 2014 – Jun 2015
Location Kolkata, India
OS Windows
Tools Apache JMeter v3.8
Application Web based & Web Service
PROJECT DESCRIPTION:
It’s a web-based application that allows the user to create a file on a property, add/edit/delete attributes (property address, buyer/seller information, loan amount, etc.), and take the Property through the Closing process, as mandated by US federal and California-state property laws. The project involved performance testing of the Closing application.
ROLES AND RESPONSIBILITIES:
➢ Non-functional requirements understanding
➢ Development of Performance test scripts
➢ Designing and development of Workload mix
➢ Execution of Test scripts
➢ Monitoring the Server side counters
➢ Analysis of test results
➢ Test report preparation
PROJECT #5
Duration Aug 2012 – Dec 2013
Location Kolkata, India
OS Windows
Tools HP LoadRunner, Apache JMeter v3.8
Application Web based & Web Service
PROJECT DESCRIPTION:
The customer is a US-based multinational banking and financial services holding company with operations around the world. The customer offers products and services in multiple areas including deposits, home mortgage servicing, and debit cards. The objective of the project is to ensure that the critical web services conform to performance SLAs in various load conditions in line with business requirements of the application’s users.
ROLES AND RESPONSIBILITIES:
➢ Designing and development of Workload mix
➢ Execution of Test scripts
➢ Monitoring the Server-side counters
➢ Analysis of test results
➢ Test report preparation
Personal Skills
➢ Strong documentation and report-writing skills
➢ Excellent time-management and time tracking abilities
➢ Good collaboration skills for systems tuning
➢ Very detail-focused and highly analytical
➢ Effective communication and interpersonal abilities
Timeline
Lead Performance Tester
Tata Consultancy Services
08.2019 - Current
Performance Test Analyst
Cognizant Technology Solutions
06.2012 - 07.2019
B. Tech - Computer Science
NIT Agartala
12th - Science
Ramakrishna Mission Vidyalaya
10th -
Bharatiya Vidya Bhavan
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