NANDAGOPAL RAMAVARMA

415 939 8923 (NanduRV2015@gmail.com)

EXPERIENCE SUMMARY

 

·   Technical Consultant with over 10+ years of experience in hardcore Designing and Development in ETL, Web and Windows applications using Microsoft  Development Platform.

·   Experience in Open source development platforms such as Talend development studio for data integration (ETL), Python scripting and Tableau for Reporting/visualization.

·   Involved in all stages of SDLC such as analysis, estimation, requirement gathering, design, development, testing, certification, and target deployment. Good experience in Customer Interaction, Requirement Analysis, and Presentations

·   Worked on data warehousing projects from inception to implementation and delivered high quality solutions in a timely manner meeting and exceeding the business requirements. This involved working with the top management and executives, business sponsors and IT department

·   Responsible for defining the information architecture and technology infrastructure along with the design of multi-dimensional data models and the Business Intelligence delivery solutions

·   Experience in project management methodologies such as V-Process Model, Spiral, Waterfall, Iterative, and Agile – Scrum

·   Technical Expertise in Data Warehousing

Ø       Thorough understanding of Kimball strategies. Good experience in Dimensional Modeling.  Logical & Physical Model design, using design tools MS Visio and ErWin. Designing Facts and Dimension Tables (Star Schema and Snowflake Scheme). Integration with excel using Power Pivots.

Ø       Responsible for managing the data analysis, data sources, data mapping along with defining the meta data repository.

Ø       Experience in designing and building Data Marts using SQL Services Analysis Services (2005 / 2008 / 2012). Cube partitioning, Building calculated fields, KPI (Key Performance Indicator).

Ø       ETL package, design, builds, test, and deploy using MS SQL Server Integration Services (2005/ 2008 / 2012). Design of scalable, reusable, and low maintenance ETL templates.

Ø       ETL Development using Open source tools such as Talend.

Ø       Experience in handling large data around of 30 ~ 65 GB.

Ø       Good experience in reporting tools such as Tableau (Open Source), MS SQL Reporting Services (2005 / 2008 / 2012), Crystal Reports, Report Smith, Quick Reports, and API Reports.

Ø       Publishing the reports. Ad-hoc reports using Tableau and MS SQL Reporting Services

Ø       Created & formatted cross-tab, conditional, drill-down, top n, summary, form, sub reports, parameterized reports, interactive reports & custom reports.

Ø       Database programming (Transact-SQL, Store Procedure, Functions, and Triggers) in SQL Server 2000/ 2005, Oracle 8i, SSIS, and DTS. Expert in data cleansing, data scrubbing and data migration).

Ø       Experience in Table Partitioning, Indexing and Building Indexed views.

Ø       SQL Queries optimization and Performance tuning using SQL Profiler

Ø       Involved in large scale migration of Crystal Reports to SSRS 2005 and DTS to SSIS 2005

·   Technical Expertise in Windows & Web Application Development

Ø       Architecting, design, development, and implementation experience in Microsoft Technologies such as VS 2005/ 2008, VB.NET, and C# for Windows and Web Application Development

Ø       Good knowledge of Web Services and .NET Remoting

Ø       Architecture, design, and development experience in handling large migration projects from Visual Basic 6.0 to VB.NET and ASP to ASP.NET

Ø       Good knowledge in WPF, AJAX, Design Patterns, and SOA

Ø       Application performance fine tuning and capacity planning for web applications

 

·   Key Achievements-

Ø       Developed Insight BI-DW tool (Open Source) for SSIS Package generation automation using SSIS Design Library.

Ø       Migration of complex 300 Crystal Reports (.CAR and CAB) to SSRS and SSAS 2008

Ø       Experience in executing and planning projects of 90 applications at a time.

Ø       AS-IS migration of Visual Basic 6.0 Application to VB.NET 2005 (Tool-based) – SmartClient-based

EDUCATIONAL QUALIFICATION

 

·   Bachelor of Engineering (Mechanical), Bharathiar University, Tamil Nadu, India

TECHNICAL SKILLS

 

Operating Systems	MS Windows NT/ 2000/ XP
Tools	MSBI (SSRS, SSIS, SSAS 2005/2008/2012), VSTS 2005/ 2008, Crystal Reports, MS Visio, CLR Profiler, MS AJAX Toolkit, Talend, Tableau, Phython 2.x
Software	.NET 1.x/ 2.x/ 3.x/, C#, VB.NET ASP.NET, ASP, Visual Basic 6.0, .NET Web Services, .NET Remoting, AJAX, T-SQL, Visual Basic, JavaScript
Databases	MS SQL Server 6.5/ 7.0/ 2000/ 2005, SSIS 2005/ 2008 /2012, Sybase, Oracle, DTS, Performance Tuning

 

Argus Information & Advisory Services, LLC	Nov 2012 ~ Till Date
cyberThink Inc	Nov 2012 ~ Nov 2013
Synechron Inc, USA	June 2010 ~ Nov 2012
Accenture India	Apr 2009 ~ Jan 2010
Wipro Technologies, India	Oct 2002 ~ Mar 2009
LS Software, India	Aug 1997 ~ Oct 2002

 

PROJECT EXPERIENCE

Argus Information & Advisory Services, LLC, USADec’13 to Till Date

1. Facebook

Client: Facebook (Work Location –NY, USA)Dec’13 to Till Date

Role: BI Lead Developer

Description:

Facebook data feed is to provide Facebook authorized purchase transaction from various institution in 48 hours interval / SLA. The information provided Facebook will be based on the customer sales and behavior based on regional, States, PIN, Age, Supplier Name, Geographic Coordinates etc.. Facebook may use the daily feed to display the Advertisement in FB user community. Dataset of size 300GB to 1TB are weekly are managed.

 

Responsibility

- ETL Platform using SSIS and SQL Server as backend. SSIS Packages designed to handle peak load of 250 GB.

- A ETL Generic framework designed to convert the incoming files of various format to FB output specific format.

- Developed a customizable framework to process the incoming raw files (CSV, Delimited and Fixed) from various institution

- Custom Profiler written in SSIS (extensively using Script Component (C#)) to profile the incoming files and access the data quality. Longitude and Cross-section based data validation.

- Data Loader program in C# to Manage incoming files to FB feeder SSIS program and also posting the files to SFTP.

- Transforms to process raw data to data type specific and to perform data cleansing.

- Performance tuning in SSIS Packages and SQL Server

- Data Modeling using SSAS 2008. Design various Dimensions and Fact tables, Building the Analysis cubes for various studies such as Marcy, Target etc..

- Integration with python (2.7) scripts for file management, Data Profiling, Data presentations for customers.

 

Environment: SSIS 2008, SSAS 2008, SQL Server 2008, C#, Python.

 

cyberThink Inc, USANov’12 to Nov’ 13

2. Project: Discovery (Product) May’13 to Till Date

Client: Product (Work Location – Charleston, WV, USA)

Role: BI Developer

Description: Rx Data Track is to monitor the sales of compound drugs sold by the various pharmacies. Designed as a product which can be deployed in any state in US and follows the ASAP 4.2 guidelines. System has the capability to alert various enforcement agencies about the drug’s misuse as Reports. Application is in Phase 1 to use Talend as the ETL Platform and Tableau for various reporting need reporting needs. Talend and Tableau interacts with SQL Server 2012.

 

Responsibilities:

- ETL Loaders build on Talend access various metadata such as XML, Flat Files (with various formats) and SQL  Databases.

- Customization of workflow using tJava & tJavaRow using components.

- Design and Development of Rich Graphic content using Tableau. Created formatted graphical, cross-tab, conditional, drill-down, top n, summary, sub reports, parameterized reports, interactive reports & custom reports.

- Tableau for Analytical Reports accessing the data from Data Marts build on SSAS 2012.

- Dashboard in Tableau with KPI and with drill down features.

 

Environment: Talend (5.3), Tableau Professional Edition, SQL Server 2012.

 

3. Project: RX Data TrackNov’12 to May 2013

Client: Board of Pharmacy, WV, USA (Work Location – Charleston, WV, USA)

Role: BI Developer, Lead

Description: Rx Data Track is to monitor the sales of compound drugs sold by the various pharmacies in the state of WV. System has the capability to alert various enforcement agencies about the drug’s misuse.

 

Responsibilities:

o     Requirement Analysis and Understand the Business and Functional Flow. (User stories for ETL Flow)

o     Involved building the Back office systems architecture and DW Design.

o     Create Conceptual/Logical/Physical models design and Data integration. Design Data structures and database in SQL Server 2012.

o     Customizable (Reusable) File loaders using SSIS script Control (C# & VB.NET), to build the Relational Model Data from RAW Data or XML. . Customized error handlers using C# blocks. Migration of reusable Excel macros, DTS Jobs to SSIS Package.

o     Created reusable ETL & Reporting templates using SSIS 2012 & SSRS 2012.

o     Design and Development of Data Models using SQL Server Analysis Services 2012.

o     Develop real time - dashboards, standard and ad-hoc reports using SSRS and SSAS Cubes reports using MDX Reports. Building Functions, Aggregate, Hirarcheries in SSAS Cubes.

o     Design various Dimensions and Fact tables, Building the Analysis cubes.

o     Write TSQL queries and tune TSQL queries and Indexes, Data Optimization, using SQL Profiler.

o     Develop SSIS Packages and create ETL Jobs and Scheduling using SQL Agents.

o     Develop interfaces to external database sources, Cleaning and conforming data.

o     Create and migrate Data objects (DDL) across Development /QA/Production environment.

o     Reverse engineer source system structures for model sourcing.

o     Agile Development and Documentation (Source ~ Target), User Story, Data Analysis Design, Dimension Bus Matrix.

o     SSIS Packages Performance tuning, TSQL Query optimization and Debugging. ETL Packages , Model & SSRS Reports deployment and Online Support

o     Implemented SCD (Slowly Changing Dimensions) Type 1 ~ Type 3, Using SSIS 2012. Designing OLAP database using star schema.

 

Environment: SSRS 2012, SSIS 2012, SSAS 2012, Agile Scrum, MS Visio, SQL Server 2012, C#, VB.NET, XML

 

Synechron Inc, INDIAMay’10 to Nov’12

1. Project: WFS NormalizationMar’12 to Nov’12

Client: Wells Fargo, USA (Work Location - Charlotte, NC, USA)

Role: BI Developer & Lead

Description: WFS was a project initiated by Wells Fargo to capture the key customer information as part of the regularization process. It involved-

o     Identifying the key business entity information, which required regularization

o     Building and reporting business entity data to stakeholders

o     Understanding the key business critical information from stakeholders as client interviews

o     Data consolidation and writing back to source databases

o     Building and implementing an Audit and Governance practice for Wells Fargo Security department

The Audit and Governance tool was designed to monitor changes to selected/ interested fields in the database. The application was built on ASP.NET with AJAX Controls and JScript.

Responsibilities:

o     Work with various stake holders in understanding the requirements and Building the DW architecture.

o     Data analysis of source systems (Various CRM systems and Stand Alone).

o     Design and Development of 50 SSIS Jobs  designed in SSIS performing various ETL Operations.

o     Design various Dimensions and Fact tables and Building the Analysis cubes.

o     Worked on several transformations in Data Flow including Derived-Column, Script, Slowly Changing Dimension (Using SSIS Controls), Lookup, Data Conversion, Conditional-Split and many more.

o     Development of ASP.NET (C#, Sybase, AJAX) based Audit & Governance application to keep track of the new customers for various trading modules.

o     Develop interfaces to external database sources, Cleaning and conforming data.

o     Agile Development and Documentation (Source ~ Target), User Story, Data Analysis Design,  Dimension Bus Matrix.

o     Designed SSIS Packages to transfer data between servers, load data into database; Scheduled the jobs to do these tasks periodically;

o     MS Excel Dash board and for reporting.

o     Create and migrate Data objects (DDL) across Development /QA/Production environment.

o     Reverse engineer source system structures for model sourcing.

o     Worked as a business analyst - gathering requirement from business users to understand business processes, document project requirements and translate them into functional and non-functional specifications for BI reports and applications.

o     Write TSQL queries and tune TSQL queries and Indexes, Data Optimization, using SQL Profiler.

o     Develop SSIS Packages and create ETL Jobs and Scheduling using SQL Agents.

 

 

Environment: VS 2008, C#, ADO.NET, SSRS 2008 SSIS 2008, SSAS 2008, Agile Scrum, MS Visio, Sybase, SQL Server 2008

 

2. Project: Insight ETLAug’10 to Aug’11

Client: Wells Fargo, San Francisco, USA (Work Location - San Francisco, USA)

Role: BI Lead  / Individual Coordinator

Description: Insight is a tool developed for the automation of ETL Package creation and execution. Insight is targeted for Business Analysts (BA). BA uses insight to create simple actions such as (SELECT, JOIN, and AGGREGATE) and these actions are converted into SSIS ETL package. Automatic creation of SSIS package is obtained by using SSIS Design Time Library. Insight hides the complexities of building the SSIS package from the Business Analyst. Insight will be released as open source to user communities.

URL: http://insight.codeplex.com/

Insight uses SSIS Design Time Library for SSIS package creation. SSIS Components, which are supported are provided below-

o     Control Flow: Execute SQL Task and Script Component

o     Data Flows: Data Flow Transforms such as Aggregate, Conditional Split, Derived Column, Sort, Union ALL, Multi Cast, Merge Join, Row Count, Script Component, OLE DB Command, OLE DB Source, and OLE DB Destination

Responsibilities:

·   Build and Execute ETL SSIS Packages created using Insight ETL

·   Verify the SSIS Packages created using Insight ETL, like Transforms, Performance and Optimization

·   Production Support

·   SSIS ETL Packages for Data validation and analysis

 

Environment: VS 2008, C#, SSIS 2005, MS SQL Server 2005, ADO.NET, Agile Scrum, MS Visio, TFS 2010

 

Accenture Ltd, INDIAApr’09 to Jan’10

1. Project: Discovery (Application Migration)Apr’09 to Jan’10

Client: Chaucer Syndicates, London, UK (Work Location - UK, London)

Role: Technical Architect/ BI Lead

Description: Enterprise level migration of different application used in organization to Microsoft Technologies. Scope of work:

o     Involved in engagement, pre-sales, and project initiation activities

o     Design and migration of over 100 applications in Excel and MS Access in SOA-based ASP.NET web application in C#

o     Design and migration of 10 Visual Basic applications to VB.NET assemblies (re-development and also tool-based migration) as Loaders using SSIS.

o     Migrated over 3000 Crystal Reports to SSRS and DTS to SSIS.

o     Build scalable data warehouse using SSAS

o     Performance fine tuning of SQL Server database

Responsibilities:

·   Worked as a business analyst - gathering requirement from business users to understand business processes, document project requirements and translate them into functional and non-functional specifications for BI reports and applications, Keeping track of changes in requirements on daily basis

·   Designed complex SSAS solutions using multiple dimensions, perspectives, hierarchies, measures groups. Designed OLAP cubes with star schema and multiple partitions using SSAS

·   Designed complex SSIS packages with error handling as well as using various data transformations like conditional split, fuzzy look up, multi cast, column conversion, fuzzy grouping.

·   Worked with tabular, matrix, gauges & chart reports, drill down reports as well as interactive reports according to business requirements.

·   Designing and developing data warehouses, data marts and business intelligence using multi-dimensional models such as star schemas and snow flake schema for developing cubes using MDX.

·   Assessing project driving factors through AJILE ( sprint and scrum ) sessions with Discovery Team

·   Built MDX queries and data mining expression (DMX) queries for analysis services & reporting services.

·   Conversion of Sql Server DTS 2000 to Sql Server SSIS 2008 Packages for Development, Testing, Production environments.

·   Created packages in SSIS with error handling as well as created complex SSIS packages using various data transformations like conditional split, lookups, aggregations, expressions, fuzzy look up, for each loop, multi cast, column conversion, fuzzy grouping, script components

·   Worked with tabular, matrix, gauges & chart reports, drill down reports as well as interactive reports according to business requirements.

·   Designed and developed report with running value, interactive sorting as well as conditional formatting. Created sub-reports to present more detailed information about the summary.

·   Designed complex SSAS solutions using multiple dimensions, perspectives, hierarchies, measures groups. Designed OLAP cubes with star schema and multiple partitions using SSAS

·   Migration Sql Server 2000 DTS packages in to Sql Server 2008 using built in tool

·   Formulated and documented the physical ETL process design based on business requirements and system specifications with strong ETL design skills, including source to target mappings, transformations, lookups, aggregations, expressions.

·   Deploying SSRS Reports in Share point  integration environment, allow the business users to interact to those reports and implement securities for sensitive reports

·   Designed and developed report with running value, interactive sorting as well as conditional formatting, Created sub-reports to present more detailed information about the summary.

·   Experience on created reports using stored procedure. Involved in scheduling, creating snapshot and subscription for the reports and triggers to facilitate consistent data entry into the database.

·   Created projected income statements and other financial reports. Developed yearly, quarterly, monthly sales Reports, bench marking reports and commission reports

·   Created SSRS report model projects in bi studio and created, modified and managed various report models with multiple model objects, source fields and expressions.

·   Designed OLAP cubes with star schema and multiple partitions using SSAS

·   Designed complex SSAS solutions using multiple dimensions, perspectives, hierarchies, measures groups

 

Environment: VS 2008, C#, VB.NET, Web Service, MS AJAX Toolkit, MS SQL Server 2008, MS Foundation, WCF, SSRS 2008, SSIS 2008, SSAS 2008, ADO.NET, XML, VBA, IIS, Agile Scrum, MS Visio

 

Wipro TechnologiesAug’02 to Mar’09

1. Project: Green Field (Online Trading)Nov’07 to Mar’09

Client: Charles Schwab, USA

Role: Technical Architect/ Onsite Coordinator (Work Location: USA, SFO)

Description: Green Field is the migration of Charles Schwab Core Trading Platform from Java to Microsoft.NET Technologies. Initial phase of the project was focused only on converting the user interface from Java to .NET WebForms. .NET pages interacted with coarse gained Web Service via WCF. Green Field migration consists of 60 ASP.NET applications. Web Services ran on WebSphere and data stored in Mainframe. TFS is used for version/ Life Cycle Management and VSTS test edition is used for performance certification and assessment.

Responsibilities:

·   Migrated technical artifacts from VSS to TFS. Installed and troubleshot test rigs (agents and controller)

·   Initiated the build and deployment of application in the test bed environment for performance certification as per the two weeks release cycle, in special cases (Team Foundation Build OR using MS Build)

·   Developed custom reports in TFS to publish performance related data. These reports are connected to the LoadTest as data source. Publishing the data as reports in TFS release based

·   TFS Management

·   Test Data setup for application using SQL Integration Services

·   Assisted QA in developing VSTS 2008 test edition scripts for all the pages listed by business as critical for all the 60 GF Applications which included extensive customization of the scripts generated by Test Editor and identifying the page load times, web parts, calls to the WS Layer, and images

·   Executed profiler, prepared performance matrix based on test results, and identified improvement areas (breakdown structure)

·   Captured the matrix data after performance test and stability test for the web application. Interacted with Schwab and other vendors about the performance improvement areas

·   Created special custom tools in C# to consolidate test results

·   Monitored the GC events and elapsed time in the IIS Server

·   Identified memory leaks

·   Monitored error logs

·   Capacity planning and load balancing on web servers

 

Environment: VSTS 2005, C#, UNIX, MS SQL Server 2005, ADO.NET, XML, SSRS, SSIS, VBA, IIS

 

2. Project: HystarSep’07 to Nov’07

Client: Shell (SGS), Holland (Work Location: Holland, Amsterdam)

Role: Architect/ Lead

Description: Hystar is a modeling tool (Product) developed by Shell Global Solutions (SGS) Division and the application were developed using VB.NET 2005. Hystar was built on a framework developed by SGS which functioned as a layer (also called Inter Operability (IO) Layer) for calculation and test bed preparation for the chemical assessment of the refineries. UI uses the inter operability layer for data processing and presentation. Serious performance related problems were observed while processing the real/ close to production data.

Responsibilities:

·   Understood the application (code review) and Hystar model design pattern

·   Prepared a road map/ approach for performance improvement (process)

·   Implemented the changes and win customer confidence (development and fixes)

·   Documented the work process to be followed in the future (sign-off)

 

3. Project: Venus RefractoryJan’07 to Sep’07

Client: State Street, France (Work Location: France, Paris)

Role: Architect/Lead

Description: Venus Refractory project focused on migration of single user Microsoft applications such as Visual Basic 6.0/ 5.0, MS Excel, VBA, and Access Applications to.NET-based SOA. A total of around 90 applications were identified as in-scope for the migration. Customer did not hold any sufficient documentation about the applications. Hence AS-IS migration approach was identified. A SOA-based .NET Framework developed by State Street was used to deploy the .NET Web Services. Initial task was to identify and separate the user interface/ related events and business rules which were implemented in the methods from Microsoft applications. Methods used in Microsoft applications were converted to .NET Web Services. Microsoft Window screens were converted to ASP.NET Pages and invoked Web Services. Migration of VB Methods to ASP.NET Web Services was line by line migration.

 

4. Project: Pipe RBAMar’06 to Jan’07

Client: Shell, Holland (Work Location: Holland, The Hauge)

Role: Architect

Description: Pipe RBA is a product developed by SGS division of Shell for assessing the life of pipelines from corrosion and other natural calamities. Pipe RBA is a thick client application developed in VB 6.0 and database as MS Access 2000. The project was to migrate the application from VB 6.0 to VB.NET.

Responsibilities:

·   Conducted a due-diligence exercise for the migration assessment

·   Recommended approach of AS-IS migration (tool based) as Pipe RBA applications used complex calculation for assessment and the customer was not willing to share the design details about the product stating aspects of confidentiality

·   Assessed the migration tool in Visual Studio 2005 which was used for migration

·   Application was designed in a three tier architecture separating the business and data layers from UI (which was not how it was implemented in VB 6.0) without changing any of the core functionalities

·   Converted/ migrated data from MS Access to SQL Server 2000

·   Performance bench marking was performed during the start up of the project to assess the performance of the applications in identified/ key activities

·   Developed custom graphs control during the migration, since the graphs were created using pictures box, lines, and curve objects in VB 6.0

 

Environment: Visual Basic 6.0, VB.NET, MS SQL Server, SmartClient, Infragistics Controls

 

5. Project: System ONEMar’05 to Mar’06

Client: Shell, Amsterdam, Holland (Work Location: UK, London/ Bangalore)

Role: Technical Lead/ Onsite Coordinator

Description: The System ONE application aims to facilitate planning and economic data management for projects of EP, GP, and SEE Business Groups of Shell. It is interfaced with Livelink, GP website, and EP portal. The application uses XL and PowerPoint templates to load data into the system and for preparing reports. This application was developed in VB.NET, ASP.NET, and MS SQL Server 2000.

 

6. Project: Rate TrackSep’04 to Mar’05

Client: Glaxo Smith Kline, London, UK

Role: Technical Lead

Description: Web-based freight management software to capture the freight rates for Logistics Service Providers (LSP). Application needed to be migrated from ASP to ASP.NET with some additional features.

 

Environment: ASP.NET, Oracle 8i, VB.NET, XML

 

7. Project: Intel ISJun’04 to Sep’04

Client: Intel, USA

Role: Technical Lead

Description: Migration of customized reports from MicroStrategy 7.2.1 to 7.5.1. MicroStrategy 7.5.1 report pages are built on .NET Framework, where as the actual implementation in terms of business rules were in Java. The report pages were developed using ASP.NET and used Java Beans as the data provider from MSTR.

Environment: MicroStrategy, MS SQL Server 2000, ASP.NET, ASP, VB.NET, ActiveX, IIS, XML, XSLT, ADO.NET

 

8. Project: Versa XSMar’03 to Jun’04

Client: Chamberlain, USA

Role: Technical Lead

Description: Versa XS, a product developed for programming access control devices. Application was designed to communicate with the hardware access control device using RS 232/ Modem. Versa XS was designed as a web-based application with provisions to extend the features to multi-language support. Versa XS was designed in layered architecture.

 

Environment: MS SQL Server 2000, C#, XML, ADO.NET

 

9. Project: Global Planning and Scheduling System (GPS)Aug’02 to Mar’03

Client: Intel, USA

Role: Designer/ Developer

Description: GPS was an internal supply chain management project developed for Micron Technologies Inc. It provided Micron an optimizing global plan and detailed scheduling solution for each of their manufacturing sites.

 

Environment: Visual Basic 6.0, PERL, XML, Sybase, MS SQL Server 2000