Vamshi
Warsaw
Summary
A seasoned Tableau developer with a proven track record. I excel in driving end-to-end project development and implementing innovative data visualization solutions. Expert in Tableau and adept in project management, I have significantly enhanced business decision-making processes. My leadership in team management and strategic project consultation has consistently led to business excellence and transformative solutions.
Overview
5
5
years of professional experience
Work History
Senior Technical Lead
HCL Technologies
12.2023 - Current
- Adept in end-to-end development of project from requirement analysis to system study, designing, coding testing, de-bugging, documentation, and implementation.
- Developed Gathered and documented business requirements for analytical reports and Participated in requirements meeting and data mapping sessions to understand business need.
- Identified and documented business rules.
- Strong Dashboard design experience and passionate practitioner of effective data visualization.
- Familiarity with best practices around visualization and design.
- Experienced in designing customized interactive dashboards in Tableau using Marks, Action, filters, parameter, calculations, and Relationships.
- Provide support to user community on various Tableau Server and Desktop issues.
- Expertise in dashboard and report development using Tableau.
- Create Tableau Scorecards, Dashboards using stack bars, bar graphs, scattered plots, geographical maps, line/pie graphs, and charts.
- Build and publish customized interactive Tableau reports and dashboards along with data refresh scheduling using Tableau Desktop and Tableau Server.
- Strong ability to interface and communicate effectively with business representatives.
- Continuously improve data integrity and reporting effectiveness.
- Expert level capability in Tableau calculations and applying complex, compound calculations to large, complex data sets.
- Created custom Function's Date range, Time functions, array functions, and Conditional formatting functions in the reports.
- Worked extensively with Advance analysis Actions, Calculations, Parameters, Background images, Maps, Trend Lines, Statistics and table calculations.
- Conduct impact analysis to accommodate new changes / requirements.
- Direct single point of contact for clients.
- Frequently investigated codes during job failures.
- Perform daily and routine checks for the applications.
- Expert level capability in Tableau calculations and applying complex, compound calculations to large, complex data sets.
- Created Scatter Plots, Stacked Bars, Box and Whisker plots using reference, Bullet charts, Heat Maps, Filled Maps and Symbol Maps according to deliverable specifications.
- Involved in trouble shooting of performance issues, which were associated with Tableau reports.
- Imported Custom visuals like Card with states Gauge charts, Advanced Drill Down charts, etc.
- Migration of data from different databases like Oracle, DB2, MySQL to Redshift.
- Acquires a clear understanding of the IT industry, technology trends with the distinction of instituting new practices to achieve business excellence at the lowest overall cost.
- Strong Dashboard design experience and passionate practitioner of effective data visualization.
- Familiarity with best practices around visualization and design.
- Consistent success in maximizing corporate performance.
- Mentor, motivate, and lead high-performance development members.
- Worked closely with Business users.
- Interacted with Data stage ETL developers, Project Managers, and members of the QA teams.
- Experienced in Tableau best practices for dashboard development and data source management (e.g. certified data sources, creating template workbooks, optimizing workbook performance).
- Involved in Full Life Cycle Development of Reporting Projects includes Requirements Gathering/ analysis, Design, Development, Testing and Production rollover.
BI Developer
Revolut
03.2022 - 11.2023
- Develop Tableau visualizations based on the business needs by connecting to multiple data sources.
- Played vital role of a Business Analyst whenever necessary.
- Hands on experience using advanced analysis, Actions, Calculations, Parameters, Background images, Maps, Groups, Hierarchies and Sets to create detail level summary reports and Dashboards using KPI's.
- Implementing advanced geographic mapping techniques and use custom images and geo coding to build spatial visualizations of non-geographic data.
- Created actionable reports.
- Connecting to multiple data sources, worked on Extracts and used data Blending, Joins to create different interactive views and dashboards.
- Generated dashboards for Finance team & provided security by using user filters & used context filters which drastically reduced analysis time and improved performance.
- Published, customized reports and dashboards, report scheduling and assigned appropriate permission sets for Tableau server logons and security checks.
- Extensively used Custom SQL queries to better import and manipulate data.
- Worked closely with Business users. Interacted with ETL developers, Project Managers, and members of the QA teams.
- Excellent knowledge in developing Server job utilizing different kinds of stages like Sequential file, ODBC, Hashed record, Aggregator, Transformer, Sort, Link Partitioned and Link Collector.
- Identify the Data Stage jobs and spotting production errors and issues like performance tuning and improvement.
- Good Exposure in design Parallel job processing, utilizing different stages like Join, Merge, Lookup, remove copies, Filter, Dataset, Lookup record set, Complex level document, Modify, Aggregator, XML.
- Create Data stage jobs using designer in various stages like Transformer, Aggregator, Sort, Join, Merge, Lookup, Data Set, Funnel, Remove Duplicates, Copy, Modify, Filter, Change Data Capture, Change Apply, Sample, Surrogate Key, Column Generator, Row Generator, Etc.
- Participated in daily stand-ups with clients on daily design and development effort.
- Work on sequential file, dataset, file set, look up file set stages, Parallel Stages like Row Generator, Column Generator, Head, and Peek for development and de-bugging purposes.
- Develop scripts based on client requirement by using data stage ETL tool and perform the performance tuning of those developed jobs.
- Liaising with the client and other departments on live production issues and implementing quick and efficient solutions for the issue
- Effectively Used the Data Stage Director to schedule running the solution, testing and debugging its components, and monitoring the resulting executable versions on ad hoc or scheduled basis.
- Created complex stored procedures using input and output parameters, cursors, views, triggers and complex queries using temporary tables and joins.
- Provide the solution for logical data model design, generating database, resolving technical issues, and loading data into multiple instances.
- Provided technical support to the clients and users relating to the development issues and errors.
- Conduct impact analysis to accommodate new changes / requirements. Direct single point of contact for clients. Frequently investigated codes during job failures. Perform daily and routine checks for the applications.
Tableau Developer
Genpact
02.2020 - 03.2022
- Worked with Business Partners to understand requirements and prepared mock-up dashboards to finalize requirements.
- Created technical documentation with detailed design specifications.
- Worked as the primary Tableau developer within the team.
- Published dashboards to the Tableau server and setup users on the Tableau server.
- Created detailed test cases and performed unit testing and functional testing.
- Improved performance by analyzing the performance of the dashboard using the Performance Recording feature in Tableau and other performance tuning techniques.
- Created work flow documentation for the business partners' reference.
- Develop and maintain scalable data pipelines using Python and PySpark.
- Collaborate with data engineers and data scientists to understand and fulfill data processing needs.
- Optimize and troubleshoot existing PySpark applications for performance improvements.
- Write clean, efficient, and well-documented code following best practices.
- Participate in design and code reviews
- Develop and implement ETL processes to extract, transform, and load data
- Ensure data integrity and quality throughout the data lifecycle.
- Stay current with the latest industry trends and technologies in big data and cloud computing.
- Proven experience as a Python Developer with expertise in PySpark.
- Strong understanding of big data technologies and frameworks.
- Experience with distributed computing and parallel processing.
- Proficiency in SQL and experience with database systems.
- Solid understanding of data engineering concepts and best practices.
- Ability to work in a fast-paced environment and handle multiple projects simultaneously.
- Excellent problem-solving and debugging skills.
- Strong communication and collaboration abilities.
Education
MBA - Engineering Management
Wyższa Szkoła Gospodarki Euroregionalnej
05.2020
Skills
- Windows
- UNIX
- LINUX
- Tableau
- PowerBI
- HTML5
- CSS
- XML
- Python 30
- UNIX Shell Scripting
- Datastage
- Informatica
- Abinitio
- SQL
- PL/SQL
- HP Vertica
- Oracle 11g
- MS SQL Server 2008
- Postgres
- IBM DB2
- Teradata
- Hadoop
- Big Data HDFS
- Hive
Work Authorization
Authorized to work in Poland.
Timeline
Senior Technical Lead
HCL Technologies
12.2023 - Current
BI Developer
Revolut
03.2022 - 11.2023
Tableau Developer
Genpact
02.2020 - 03.2022
MBA - Engineering Management
Wyższa Szkoła Gospodarki Euroregionalnej
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