Summary
Overview
Work History
Education
Skills
Responsibilities
Timeline
AccountManager
Nithya Essaky

Nithya Essaky

ETL Tester
Chennai

Summary

Results-driven professional with 8 years of overall experience, including 3.9 years of specialized expertise in the banking domain and 4 years in software testing. Proficient in manual testing, analyzing ETL mappings, and ensuring data integrity through comprehensive validation. Skilled in Agile methodologies, with a strong track record of designing detailed test cases and leading teams to deliver high-quality solutions. Committed to maintaining data quality standards and achieving successful project outcomes.

Overview

11
11
years of professional experience

Work History

ETL Tester

AstraZeneca
02.2025 - 05.2025
  • The core functionality worked for Life Science Domain.
  • Responsibilities
  • Understood data requirements and data mapping documents for ETL test case design.
  • Performed data validation and data integrity checks between source and target systems.
  • Created and executed test cases for data extraction, transformation, and loading processes.
  • Used SQL queries extensively to verify data accuracy, transformation logic, and relationships.
  • Reported defects in JIRA and worked closely with developers to ensure timely resolution.

ETL Test Engineer

Maveric Systems LTD
01.2022 - 07.2023
  • The core functionality worked for fund transfer (Internal, Domestic, International, World Link Transfers) along with the usage of application ALM, Eclipse, CSAW, Host Mainframe, CBO/MBOL, Data minion, TDAS, Data Elixir & MWS applications.
  • Responsibilities
  • Experience in Agile methodology, maintaining positive client and peer interactions.
  • Validated huge volume of data in the source and target environments.
  • Defects identified in testing environment are communicated to the developers.
  • Involved in test data mapping and conversion in a server-based data warehouse.
  • Used Oracle SQL to validate various data environments.
  • Executed basic SQL queries.

Senior Test engineer

Hexaware Technologies LTD
12.2018 - 06.2021
  • The core functionality worked tested cross border payments using CBPR+ standard messages (MT Messages- MT103, MT202, MT202 RTRN, MT198, MT298, MX Messages-pacs.008, pacs.009, pacs.004, pacs.002, UAEFTS CSV format – CB103, CB202, CB202RTN, CB198&298).
  • Responsibilities
  • Analysed business requirements, functional specifications and use cases and have done troubleshooting if any issues.
  • Involved in preparing Test designs and Test cases based on business requirement documents.
  • Performed Manual, UAT and Regression testing of executions.
  • Worked with project manager, business analysts, leads, and developers to resolve issues.
  • Defects handling (Tracking and Reporting of Bugs) using JIRA.
  • Co-ordination with Developers & supporting teams.
  • Ensure that the testing artifacts are documented and maintained.
  • Closely worked with the business analyst to track the change in requirements or new requirements added.
  • Analysing requirements and covered End to End level of test cases to entire project level.

Senior analyst

Scope International Pvt Ltd
10.2014 - 07.2018
  • The core functionality worked for OTT payments and handling payment creation, repair queue monitoring, cut-off screen shots along with the usage of applications EOPS, Dot Opal and SCSTAR.
  • Responsibilities
  • Knowledge of international payments method and settlement arrangements.
  • Worked in Agile environment, involved in Project Effort Estimation.
  • Addressing queries, which we received from clients end called as CPC(Country Processing Centre).
  • Good knowledge in payments of mt103, mt202, mt202cov and good communication with CPC and understanding of Swift message as well.
  • Processing payments in a timely manner to achieve agrees productivity and quality targets on all the tasks worked.
  • Have done Quality Managements, report publishing to team and client.
  • Being a team player by sharing process knowledge to the trainees and actively supporting team as well.
  • Being up to date on the Process updates and ensure 100% quality.

Education

M. Sc IT -

Meenakshi College for Women

B. Sc Maths - undefined

Madras Christian College

Skills

SQL-Snowflake

Responsibilities

  • Develop and Design ETL test cases, Scenarios, and sprints to ensure quality Data testing.
  • Responsible for analyzing business requirements, functional and technical specifications and executing the test cases.
  • Identifying defects in the testing environment and communicating to the developers.
  • Report the status of defects and execution activities including regular status updates to the project team using quality metrics.
  • Conduct usability testing to ensure the website is user-friendly, intuitive, and accessible for medical professionals with varying levels of technical expertise.
  • Performed testing and configured some of the Financial Service applications, gaining hands-on experience in financial administration and testing methodologies.
  • Contributed to continuous improvement efforts by suggesting enhancements to testing processes and tools.
  • Executed automated tests and analyzed test results to identify defects, troubleshoot issues, and ensure the quality of software products.
  • Well-versed in working within Agile environments, participating in sprints, and collaborating with cross-functional teams.

Timeline

ETL Tester

AstraZeneca
02.2025 - 05.2025

ETL Test Engineer

Maveric Systems LTD
01.2022 - 07.2023

Senior Test engineer

Hexaware Technologies LTD
12.2018 - 06.2021

Senior analyst

Scope International Pvt Ltd
10.2014 - 07.2018

B. Sc Maths - undefined

Madras Christian College

M. Sc IT -

Meenakshi College for Women
Nithya EssakyETL Tester