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Sergiy
velitski@yahoo.ca
svelytskyy@gmail.com
732-379-7393
13816 Harbor Creek Pl
Atlantic Beach, FL 32224
Sr Java Services Developer/Lead
17 years experience W2
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Summary

Professional SUMMARY

  • 15+ years of IT experience in analysis, design, development, documentation, implementing and testing software systems in industries: financial, healthcare, telecom, government.
  • Experience in core Java-Multithreading, algorithms, Parallel programming, JMS
  • Experience in using build/deploy tools such as Jenkins, Docker and OpenShift for Continuous Integration & Deployment for Microservices
  • Strong experience with Spring IO, Spring Boot.
  • Experience on working with Amazon Web Services like EC2, S3, Amazon Simple DB, Amazon RDS, Amazon Elastic Load Balancing, Amazon SQS, AWS Identity and access management, AWS Cloud Watch, Amazon EBS and Amazon Cloud Front.
  • Experienced in Amazon EC2 setting up instances, virtual private cloud (VPCs), and security groups
  • Webservices, SOA and Microservices: Oracle SOA Suite 11g, Mule ESB, Spring Boot, Spring REST and WS,
  • Client-side development (UI): Java Script, HTML, Ajax, JQuery, React.
  • J2EE frameworks: Spring, Hibernate.
  • Strong Knowledge of XML Suite of Technologies XML, XSL, XSLT, and validations with DTD and XML Schema and processing profile with SAX, DOM Parsers, JAXB binding.
  • Application Servers: WebSphere, WebLogic, JBoss, Tomcat.
  • Unix scripting: Korn Shell, C shell, Perl.
  • Database design/development: triggers, stored procedures, views, tables, normalization, referential integrity constraints, transaction processing, query optimization, PL/SQL functions, procedures and packages
  • Multi-Tier Architecture: MVC, Object Oriented Design, Distributed Objects, Structured methodology, Multi-Threading / Client-Server, Web Services Architecture: REST and SOAP based.
  • Java / J2EE Architecture, Patterns, efficient algorithms, Rational Rose Modeling, UML
  • Complex report development: multi query, parameter, matrix, tabular, group.
  • Development methodologies: Agile, RUP, Waterfall.

Professional Certification:

  • Oracle PL/SQL Developer Certified
  • Sun Certified Java Programmer.
  • AWS Certified Solutions Architect - Associate

Experience
Sr Java Services Developer/Lead
Information Technology
Feb 2016 - present
Jacksonville, FL

Developed MBS Cache service side application: Member, Benefits, Claims modules, provided production support for floridablue.com, created SpringBoot microservices and deployed them as PAAS services into OpenShift container.

  • Integrated MBS application with mainframe through the CICS, salesforce, MQ
  • Experienced in Amazon EC2 setting up instances, virtual private cloud (VPCs), and security groups
  • Configured SNS email notifications and developed file processing, used S3.
  • To parse incoming CSV files used MERGE algorithm, multithreading: Future and Callable.
  • Rewrote monolithic modules (EJB and Spring Remote) into high performed light microservices and deployed them as PaaS into OpenShift container.
  • Developed REST and SOAP microservices for mobile app, integrated services with SOA DataPower layer.
  • Implemented REST service security through JWT token / OATH standards.
  • Documented Rest/Microservices using swagger API.
  • Used spring remote for remote communication of Service and Portal layers
  • Coordinated and provided performance / load test, used SOAP UI and HP LoadRunner, analyzed results of performance / load test.
  • Analyzed service app performance, made recommendations on performance improvement.
  • For data layer used Hibernate 4, designed entity relations : one-to-one, many-to-many, one-to-many.
  • Provided architectural class and sequence diagrams, used standard patterns
  • For asynch member call created IBM WorkManager asynchronous layer
  • For app logs used splunk, EAS.

Environment : RAD 8.5, Webpshere AS, soapui, Java 6/7/8, SVN / GIT, Datapower, DB2, JAX-RS, JAX-WS, Spring 5, Spring Boot, Hibernate 5, Postgres SQL, OpenShift, Docker, Jenkins, Splunk

DataPower DB2 Docker Containers Git Hibernate IBM Websphere MQ Java JAX-WS Jenkins OpenShift REST Salesforce SOA SOAP Splunk Spring Spring Boot SQL SVN UI JWT
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Sr Java J2EE SOA developer
Information Technology
Apr 2014 - Feb 2016
Tampa, FL

Developed SealesLead webservices with SOA architecture which provides CRUD operations to accept sales leads from CPS partners, creates LEADS in salesforce.com. All leads will pass through the Enterprise Service Bus (ESB). The ESB will host multiple lead creation proxy services, each providing a partner-specific interface. The bus will translate partner lead requests into a generic form compatible with the lead service. The ESB will also abstract calls to the XLP support services.

  • Developed Spring JAX-WS web services, used SoapUI for unit testing of SOAP based webservices.
  • Developed Spring security components, to secure webeservices used WS security architecture principles like DTD SOAP attack, SOAP array attack etc ...
  • Configured SSL / HTTPs transport layers, added security features such as X.509 certificates, generated and configured keyStores for that.
  • Developed ESB transformations, used XQuery, XSLT and XPATH, developed ESB message flows, Proxy services.
  • Extensively used BPEL, generated proxy stub classes to call BPEL process from a web application, etc.
  • Integrated SOA services with salesforce.com cloud system, created salesforce SOAP proxy, used third party BlueWolf salesforce integrators.
  • For data layer used Hibernate 3, designed entity relations : one-to-one, many-to-many, one-to-many.
  • Migrated Aqualogic SOA ESB projects into Mule ESB.
  • Implemented Exception Handling for the BPEL Process models to handle System, Business exceptions and used Compensation handlers to handle the transaction if an exception occurs.
  • Developed PL/SQL stored procedures, optimized queries, created sql execution plans.
  • Used Maven to build JAX-WS and JAX-RS webservices.
  • Used MKS as integration tool : created work requests, implementation requests and efforts, Agile components like user stories and tasks, etc.
  • Developed Unix Shell scripts for scheduled jobs, used Spring Quartz scheduler jobs.

Environment: Eclipse, Spring 4, Hibernate 3, Maven, JAX-WS, Aqualogic SOA ESB, Oracle, Mule ESB, Java 6, SoapUI, TOAD, Weblogic 10.3, Agile, MKS, Unix

Agile Methodology BEA WebLogic Eclipse eService Hibernate J2EE Java JAX-WS Maven MuleSoft Oracle Salesforce Shell Scripts SOA SOAP Spring SQL Stored Procedure TOAD UNIX WebServices XSLT
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Sr Java J2EE developer
Information Technology
Oct 2012 - Apr 2014
Hallandale Beach, FL

Developed and was involved in analysis and design of PMR, DashboardWS, CronWeb JEE applications for medical center domain, designed and implemented Audit, Birt Engine, Patient Transportation modules. Developed an automated tool (DAW) that allows for prompt identification of a patients diagnoses which can be sent to physicians directly with ICD-9 codes and a guideline-based assessment/plan attached. The Engine determines the diagnosis recommendation based on available clinical data and provides several choices for the provider.

  • Developed Spring MVC controllers, JQuery UI libraries: auto complete, jquery UItable, used JSTL tag library, developed custom tags, JQuery AJAX API.
  • Used Hibernate annotations, one to one, many-to-one, one-to-many, many-to-many associations.
  • In order to log medical audit entries used Hibernate Interceptor, Spring AOP.
  • Used Google mapping API for patient transportation tasks.
  • Designed BI reports, used Birt report engine, developed MySQL stored procedures.
  • Used ORM Hibernate for mapping Entities: one-to-one, one-to-many, many-to-many, cached data using EHCache.
  • Integrated Spring and Hibernate frameworks, used HibernateTemplate.
  • Used Spring security framework for user authorization and authentication, implemented 2 factor authentication security flow, designed access and permission security levels.
  • In order to schedule cron jobs used Quartz schedule job framework, designed TaskManager abstract layer for that, implemented CronTriggers.
  • Created Spring MVC
  • REST based JSON Services, used RestTemplate for making a client call to JAX-RS webservices.
  • Implemented spring security authorization and authentication for JAX-RS webservices, used tokenized pattern.
  • Implemented session facade, business delegate, service locator, DAO, factory, MVC, abstract factory design patterns.
  • In order to process medical documents used aspose and itext pdf libraries, converted documents into PDF format.
  • Created WSDLs, XSDs, used SOAPUI and XMLSpy, HTTP Analyzer.
  • Used JMeter as a load testing tool for analyzing and measuring the performance of a variety of services.
  • Used JUnit test framework for a unit testing.
  • Used Maven profiling for QA, Preprod application build, configured JBoss AS 7.1, provided a production support.

Environment: Eclipse, Spring 3, Spring MVC, security, AOP, JQuery, AJAX, MySQL, TOAD, Hibernate 3, Maven, Birt Report Engine, JAX-WS 2.1 and JAX-RS 1.1, JMeter, JUnit, SoapUI, Java 6, JUnit, JBoss AS 7.1.

AJAX Design Patterns Eclipse Hibernate J2EE Java JAX-WS JBOSS BRMS jQuery JSON Junit Maven MVC MySQL REST Spring TOAD Triggers UI WebServices
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Sr. Java J2EE/ABAP consultant
Information Technology
Feb 2011 - Oct 2012
Miami, FL

Developed Auto registration Single Connect Service Order, Bidder Maintenance applications for fpl.com. Integrated SAP, Mainframe systems into Java based application: fpl.com. Supported applications such as Pay by Internet (PBI), Account Management, Account Info, ECA and REA.

  • Developed Action, DispatchAction, ActionForm & DynaActionForms classes, struts-config and web XML configuration files, used Struts tag library, developed dynamic Action forms, Indexed Properties, Mapped Properties, Dynamic Indexed properties to develop JSP view components, created tiles and XML def for tiles, used some validation struts features.
  • Used Spring framework features such as Spring MVC, AOP, IoC, Spring DAO
  • Developed Data Access layer using Spring DAO and SAP JOC connectors
  • Created business layer: J2C connectors to CICS Mainframe server.
  • Used JQuery library for asynchronous calls from a browser to server, used JSON format for AJAX calls.
  • In order to generate dynamic PDF reports used iText library, converted html into PDF.
  • Used JSTL, struts tag libraries for development of GUI components
  • Created SOA layer between client side and J2C connectors to CICS Mainframe server, used JAX-RPC SOAP specification.
  • Configured RAD 7.0
  • data sources, J2C connectors, environment variables, XML descriptors, server profiles.
  • Used JAXB 2.0 for a Web Service payload components.
  • Developed JAX-WS / JAX-RS web services
  • To develop persistency and mapping in beans to metadata used Hibernate 3.2, annotations, one to one, many to one, one to many, many to many associations.
  • Created Unix Kshell / Perl scripts for application statistics: usage of Mainframe connectors in all applications (over 140 apps).
  • Integrated SAP SCM into fpl.com, created JCO connectors for SAP
  • ABAP / RFC call.

Environment: WebSphere 6.1, RAD 7.0, J2C CICS, SAP JCO, SOA, Struts, JQuery, Ajax, XMLSpy, Oxygen, JAXB 2.0, JAX-WS, JAX-RS, XMLSpy, Oracle 11g, Hibernate Kshell, Perl, Unix, SOAP UI, Spring 3.X : Spring MVC, Spring DAO, Spring IOC and Spring AOP

ABAP AJAX Hibernate HTML IBM WebSphere J2EE Java Jax-RPC JAX-WS JAXB jQuery JSON JSP MVC Oracle SAP SAP CO SAP SCM SOA SOAP Spring Struts UI WebServices XML
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Sr. Java J2EE programmer analyst
Information Technology
Oct 2009 - Jan 2011
Naples, FL

Developed J2EE MSM SOA application for hospitality industry. Implemented Premier Service Router design pattern. The external application (Mobile iPhone) sends a request message. The request message is addressed to the service's external interface on the perimeter service router. The perimeter service router typically "hides" the internal endpoint address by accepting requests through an external endpoint address that is exposed to external applications. Created JAX-WS web services based on SOA architecture, clients to these services, REST web services.

  • To modify original request from external application used SOAP Handlers, JAXP DOM API.
  • Developed ADF Rich Faces components, ADF task flows, used JSF / ADF bindings.
  • As JPA layer used App module, Entity and View objects
  • To make iPhone Application scalable and flexible created Configuration API, created JAX-WS web services for that.
  • Developed custom XPath functions to transform messages
  • Implemented Exception Handling for the BPEL Process models to handle System, Business exceptions and used Compensation handlers to handle the transaction if an exception occurs
  • Extensively used BPEL to determine dynamic partner link calls, updating, generating proxy stub classes to call BPEL process from a web application, etc
  • Configured SSL / HTTPs transport layers, added security features such as X 509 certificates, generated and configured keyStores for that.
  • To develop GUI API used Oracle ADF framework, developed JSF rich components.
  • Created stored procedures, ref cursors, used PL/SQL API, made SQL queries efficient, performed SQL tuning.
  • Created WSDLs, XSDs, used XMLSpy, HTTP Analyzer.
  • Developed Action, DispatchAction, ActionForm & DynaActionForms classes, struts-config and web XML configuration files, used Struts tag library, developed dynamic Action forms, created tiles and XML def for tiles, used some validation struts features.
  • To develop Msm Logging functionality used Aspect Oriented Programming concepts.

Environment : Oracle SOA Suite, Oracle BPEL, JDeveloper 11, Java 1.6, Oracle 10g, TOAD, PL/SQL, Struts, JAX-WS, JAXB, JAXP, XML, XMLSpy, HTTP Analyzer, Oxygen, Spring, AOP, JQuery, JSF, REST, EJB3.

Design Patterns J2EE Java JAX-WS JAXB JPA jQuery JSF Oracle REST SOA SOAP Spring SQL Stored Procedure Struts TOAD WebServices XML
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Sr. Java/J2EE consultant
Banking/Financial
Aug 2007 - May 2009
Englewood Cliffs, NJ

Developed J2EE mortgage application for Washington Mutual bank, implemented user identification and authorization, basic loan information history and order credit modules, used Web Services, Spring as a bean manager container and Hibernate as ORM mapping technology, implemented JMS architecture for a credit order.

  • Developed user security functionality, used LDAP and JAAS, struts, tiles, created Session filter for session expiration and some security application features, used Digest-MD5 authentication.
  • Mapped Sun One LDAP Active directory operations to Java JNDI APIs.
  • Coded and implemented PL/SQL packages to perform Application Security and batch job scheduling.
  • In DAO used ref cursors, callable statements. In order to update / select values in database created stored procedures used PL/SQL, Sybase stored procedures.
  • In order to validate user entry developed custom tag library.
  • Implemented session facade, business delegate, service locator, DAO, factory, VO, MVC design patterns.
  • Created broker authorization Web Services, used Axis framework, generated WSDL for a Web Service client proxy.
  • Used Spring framework for a developing business DAO object, implemented inversion of control and Aspect-Oriented Programming principles.
  • In order to develop persistency and mapping in beans to metadata used Hibernate 3.2, annotations, one to one, many to one, one to many, many to many associations.
  • Configured RAD 6.0 / 7.0
  • data sources, factory queue / queues, environment variables, XML descriptors, server profiles.
  • Using Java Mail created the Email classes Log4J was used for journaling of events.
  • Developed Message Driven EJB ( MDB ), used JMS architecture, MQ Series library for importing orders from the Oracle Interface tables
  • Used struts and local object for application internalization.
  • In order to secure data in the database used encryption algorithms.
  • In order to implement business logic created EJB
  • stateless session beans, servlets, configured ejb-jar.xml
  • Optimized SQL queries and stored procedures, created efficient code that optimizes speed and CPU use.
  • Developed Action, DispatchAction, ActionForm & DynaActionForms classes, struts-config and web XML configuration files, used Struts tag library, developed dynamic Action forms, Indexed Properties, Mapped Properties, Dynamic Indexed properties to develop JSP view components, created tiles and XML def for tiles, used some validation struts features.
  • Created unit test cases, used and configured TestNG framework, used TestNG annotations.
  • Developed dynamically generated presentation tier of J2EE Patterns (GUI) using HTML, DHTML, JavaScript, CSS, XML, XSL, XSLT.

Environment: SQL Developer, RAD 6.0 / 7.0, WebSphere 6.1, XMLSpy, CVS, HTML, TOAD, J2SE 1.5, JSP, Servlets, Spring, Struts, log4j, Hibernate 3.2, Web Services, Axis, SOAP, TestNG, JMS, EJB, Oracle 10 g, DB2, Windows XP, Linux, Unix, Ajax, WSDL, Eclipse.

AJAX CSS Design Patterns Eclipse EJB Hibernate HTML IBM WebSphere IBM Websphere MQ J2EE Java Java Servlet JavaScript JMS JNDI JSP Log4J MVC Oracle Project Management SOAP Spring Struts TOAD WebServices WSDL XML
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Sr. Java /J2EE consultant
Information Technology
Aug 2006 - Aug 2007
Warren, NJ

Developed and supported enterprise SCM (Catalog management) application for online item (like music, ringback tones) searching, shopping, downloading / uploading functionality. Implemented shopping cart functionality: add, delete, checkout, submit, view, used Hibernate as ORM mapping technology, implemented JMS architecture for a billing and order system.

  • Implemented session facade, business delegate, service locator, DAO, factory, VO, business delegate, MVC design patterns.
  • In DAO used ref cursors, callable statements. In order to update / select values in database created stored procedures used PL/SQL.
  • In order to implement business logic created EJB
  • stateless session beans, servlets. Created stored procedures with dynamic ref cursors, oracle collections.
  • To implement asynchronous messages created message driven beans, used JMS, MQ Series.
  • Used ORM Hibernate for mapping Entities: One to One, One to Many, Many to Many.
  • To convert vendor XML files into Verizon XML schema created XML converter, used StAX API, Parsed input XML vendor provided data and formatted export data into VZW XML schema
  • To pass parameters from middle tier to front end
  • used JAXB (marshalling classes / unmarshalling XML schema), generated XML file.
  • Configured RAD 6.0
  • data sources, factory queue / queues, environment variables, EJB JNDI names, XML descriptors, ejb-jar.xml descriptor file.
  • Implemented high performance algorithms for data processing and analysis like quick searching and quick sorting.
  • Created C shell, Perl wrapper script, which started Java, Oracle PL/SQL Backend processes.
  • Generated SQL and PL/SQL scripts to install, create and drop database objects including: tables, views, primary keys, indexes, constraints, packages, sequences, grants and synonyms.
  • Used ODBC data connection to transfer data from Excel & Access to Oracle database.
  • Optimized SQL queries and stored procedures, created efficient code that optimizes speed and CPU use.
  • Configured log4j for multiple log files.
  • To develop persistency and mapping in beans to metadata used Hibernate.
  • To communicate SCM with a billing system created web services.

Environment: TOAD, WSAD 5.1, RAD 6.0, WebSphere 6.0, XMLSpy, MKS, ClearCase, J2SE 1.5, JSP, Servlets, EJB 2.1, PL/SQL, StAX, log4j, JMS, Hibernate, Web Services, SOAP, WSDL Hibernate, MQ Series, JAXB, Oracle 10 g, Windows XP, Unix Sun Solaris, Perl, Eclipse

Design Patterns Eclipse EJB Hibernate IBM WebSphere IBM Websphere MQ J2EE Java Java Servlet JAXB JMS JNDI JSP Log4J MVC Oracle SOAP TOAD WebServices WSAD WSDL XML
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Sr Java/J2EE developer
Information Technology
Jan 2004 - Aug 2006
Toronto, IA

Provided support and troubleshooting for financial-report application of Putnam investment company located in Boston. Created SLA (Service Level Agreement) Tracking Tool, which keeps time track of autosys jobs which are running to maintain the life cycle of Vision database. The application consists of 3 parts: 1) Backend Daemon Java Process

  • for updating Oracle database with the information about autosys jobs. The daemon consists of 2 parts managed by separate Autosys jobs: first process runs soon after midnight, and the second process starts after the first one succeeded and runs every 10 minutes. 2) SLA Web
  • for output of updated by the daemon database in the browser (based on Struts framework) 3) Charting Service (J-Chart Java component). The server provides charting services to clients through web services. Jakarta Axis framework and its implementation for SAAJ (SOAP with Attachment API for Java) are the building blocks for the web services implementation. A client's request is a HTTP/SOAP request, which contains both charting data and chart/graph specifications the corresponding HTTP/SOAP response contains chart images, which are implemented as SOAP attachments. A client generated an XML file containing charting data and specification according to Sitraka's DTD.
  • Made database design, created stored procedures.
  • To update & call Stored procedures / functions from Java beans used callable statement
  • Created graphical reports, used J-Chart Java component, created Java client to generate an XML file containing charting data and specification according to Sitraka's DTD
  • Developed java beans, servlets, JSPs, java scripts.
  • Configured project in Eclipse environment: class path, project properties and references, ant build scripts, debugging environment.
  • Developed Action and ActionForm classes, struts-config and web XML configuration files, used Struts tag library, developed dynamic Action forms.
  • To develop persistency and mapping in beans to metadata used Hibernate framework.
  • Using JNDI, LDAP, NTLM created user authentication for Sun One Directory LDAP server.
  • Created C shell wrapper script, which started Java Daemon Backend process.
  • Developed basic graphic images like icons, used Adobe Photoshop.
  • To deploy web application used Ant, created build.xml configuration file.
  • Using SQL*Loader, Korn Shell, C Shell & Autosys jobs automated Oracle updates.
  • To test application created test cases, used JUnit framework.
  • Provided support of autosys jobs for Vision database.

Environment: JBoss, Tomcat 5.0.28, WebLogic 8.1, Eclipse 3.0, MyEclipse, Ant, TOAD, CVS, J2SE 1.4, JSP, Servlets, Java Beans, Struts 1.2, Java Script, HTML, PL/SQL, JAXP, SOAP, XML, C-shell, Korn Shell, SQL Loader, J-Chart, Perl, AWK, Adobe Photoshop, Oracle 8i, Unix Sun Solaris, Windows NT.

Adobe Photoshop Ant Apache Tomcat BEA WebLogic Eclipse Hibernate HTML J2EE Java Java Servlet Javabeans JavaScript JBOSS BRMS JNDI JSP Junit Korn Shell Oracle Perl Project Management SOAP Solaris SQL Stored Procedure Struts TOAD UNIX WebServices XML
Remove Skill
Edit Skills
Non-cloudteam Skill
Education
DEEDS Project
University of Toronto
Master's in Oracle 9i E-Commerce Development
Taras Shevchenko Kiev National University
Information Systems
Taras Shevchenko Kiev National University
Certifications
Oracle PL/SQL Developer Certified
Sun Certified Java Programmer
AWS Certified Solutions Architect - Associate
Skills
Java
2021
15
Hibernate
2021
14
SOAP
2021
14
Spring
2021
12
J2EE
2016
11
WebServices
2016
11
JAX-WS
2021
10
Oracle
2016
10
SQL
2021
9
TOAD
2016
9
Eclipse
2016
8
SOA
2021
8
XML
2012
8
Struts
2012
7
UI
2021
7
IBM Websphere MQ
2021
6
JSP
2012
6
REST
2021
6
Salesforce
2021
6
Design Patterns
2014
5
HTML
2012
5
Java Servlet
2009
5
JNDI
2009
5
MVC
2014
5
Stored Procedure
2016
5
AJAX
2014
4
BEA WebLogic
2016
4
DataPower
2021
4
DB2
2021
4
Docker Containers
2021
4
Git
2021
4
IBM WebSphere
2012
4
JavaScript
2009
4
JBOSS BRMS
2014
4
Jenkins
2021
4
jQuery
2014
4
Junit
2014
4
JWT
2021
4
OpenShift
2021
4
Project Management
2009
4
Splunk
2021
4
Spring Boot
2021
4
SVN
2021
4
UNIX
2016
4
JAXB
2012
3
JSON
2014
3
Maven
2016
3
Adobe Photoshop
2006
2
Ant
2006
2
Apache Tomcat
2006
2
EJB
2009
2
Javabeans
2006
2
JMS
2009
2
Korn Shell
2006
2
Log4J
2009
2
Perl
2006
2
Solaris
2006
2
WSDL
2009
2
ABAP
2012
1
Agile Methodology
2016
1
CSS
2009
1
eService
2016
1
Jax-RPC
2012
1
JPA
2011
1
JSF
2011
1
MuleSoft
2016
1
MySQL
2014
1
SAP
2012
1
SAP CO
2012
1
SAP SCM
2012
1
Shell Scripts
2016
1
Triggers
2014
1
WSAD
2007
1
XSLT
2016
1
AWS
0
1
Continuous Integration
0
1
Solutions Architecture
0
1
SQL Developer
0
1
UML
0
1
XSL
0
1