- Contractor to Raytheon Technologies.- Providing development and maintenance support for engineering analytical applications.- The applications have graphical user interfaces (GUI), data manipulations, data generation in the form of spreadsheets, and charts.- Skills used are Python programming skills.

Worked with Data Engineering Team.Carried out tasks such as monitoring, disk capacities, and application development, troubleshooting for Bigdata systems.Developed an application for AWS cloude. Developed AWS lambda using Java / python. Used Terraform code for deploying AWS components. Used Github repository, CICD pipeline.Tools: AWS services such as lambda, CloudWatch, SNS, S3, Athena. On premise tools such as IntelliJ, VS code, Mysql, Redis, Grafana, airflow., Github, Terraform.

Norfolk Southern (Contractor), Atlanta, Georgia(One of the largest railway companies in US)Developer to support operations research. The major tasks accomplished:⦁ Worked on verifying, and correcting yard layouts.⦁ Developed a web application for generating and viewing yard layouts.⦁ Enhanced a visualization tool for tactical yard planning.⦁ Designed and developed simulation models for train movements in a yard.⦁ Developed a simulation model for engine repair shop.⦁ Implemented an algorithm for optimal train models.⦁ Developed various utilities for Optimal Train Modeling.⦁ Developed a rule generator program for optimal block modeling.⦁ Providing production support for enterprise grade applications as developer. Support includes fixing bugs, adding enhancements, and adding new features. Worked as lead deployer. Carried out many enhancements for a planning application. The front end used technologies such as NodeJs, Javascript,, ReactJS, and AGGrid. The back end had Java along with spring and database access running queries written in Sql.⦁ Worked with Manager, Analysts, Specialists, database administrators, system administrators, and Developers of Operation research. Participated in architecture meetings.Technologies, and skills used: Java development for backend, Javascript/ReactJS/AGGrid for front end, IDEs such as MyEclipse/Webstorm/Netbeans. Frameworks, such as JBoss drools/Spring boot. Object oriented programming, functional programming, rule-based programming. database accesses with JDBC, DAOs, SQL. Services/REST/Microservices development with Jersey, spring boot. Worked in container-based applications. The databases used IBM DB2, Microsoft sql server, Mongodb.

S. P. Richards (Contractor), Smyrna, Georgia March 2008 – January 2012(Subsidiary of Genuine Parts Corporation (GPC)Developer to replace the existing Legacy Merchandising product management system with new IBM Webshere Product Center (WPC) and custom code. ⦁ Designed and developed scripts in Java code for enhancements.⦁ Designed and developed code for exporting and importing large volumes of data to other databases and spreadsheets. ⦁ Implemented interfaces and business rules for catalogs based on specifications.⦁ Modified and maintained code base as bugs were identified. ⦁ Developed views for database tables.⦁ Worked with Business Analyst to understand business rules to develop code. ⦁ Development includes WPC scripting, Java programming, J2SE, J2EE, Unit testing, Spreadsheets, Eclipse, and Sql statements. Vendor Rebate Project⦁ Designed and developed Html/Javascript/JSP pages providing search selections on data from server, and validation of data on web pages. ⦁ Deployment errors to deploy the application on Jboss/Tomcat were eliminated. Implemented web based reports.⦁ Developed back end code for using hibernate, and data access objects.⦁ Development includes Java, J2SE, J2EE, Html, JSP, Javascript, Sql, Stripe, Spring, Hibernate, Eclipse, Ant, Tomcat, Jboss, Crank, Java persistence API (JPA), Model view Controller (MVC), Inversion of Control (IOC).

Vivechan (self-employed), Atlanta, GA. Worked withTopCoder on enhancements of JAVA Skills. Sept 2002 – Feb 2008TopCoder – the world’s largest competitive community for software development and digital creation. Developed the following components.Technologies Used. Java, Unit testing with Junit, Ant, Jbuilder, xml parsing, Netbeans, delegation design pattern.⦁ Null Streams. Provided trivial implementations of standard Java I/O streams that provide no input and silently drop all output, similar to the behavior of the standard null devices of various operating systems. From given UML models, implemented Java classes. Wrote unit tests for the classes, and tested them.⦁ Open Document Fonts. Developed component to handle the various attributes and elements that define fonts in the Open Document specification, enabling easy access to the various Metadata surrounding fonts, also providing the ability to act as an instance of java.awt.font. ⦁ Standard Class Data Loader. Provided the ability to load from configuration the standard namespaces and classes for a specific language.⦁ Jigsaw Puzzle. Provided a jigsaw-style puzzle type for use with the TopCoder Puzzle Framework component. This version provides a puzzle renderer that targets dynamic HTML and avoids embedding the puzzle solution in its representation, except incidentally. ⦁ Backtest Portfolio. Developed component to manage positions, process orders and supply portfolio information for a simulated Portfolio in a stock trading simulation set in the past using historical stock data. Open Source compilers and CASE tools. March 2005 – Sept 2006Studied  source  codes  of  open  source  compilers,  and  Computer  Aided  Software  Engineering (CASE)  tools. Developed a compiler front end framework for building Java language extensions from Cornell University Computer Science. J2SDK - Open source java compiler from Sun.Formal Specification / Verification / Model Checking Oct 2002

-Proceler was a research-oriented startup company.-Ported compiler source code to window operating system.-Developed intermediate representation in a compiler. This representation exposed dependencies supplied by the compiler front end. It implemented optimizations to be used for optimizing code for FPGAs (Field Programmable Gate Arrays).-Participated in related discussions.-Technologies/skills used: Porting, C++ programming, compilers optimizations like loop unrolling.

Compiler for mathematical expressions.

Performance evaluation and analysis of compilers.

Factory Floor simulation

Fortran compiler