Revanth Tummalacherla available

Revanth Tummalacherla

Java Developer

available
Profileimage by Revanth Tummalacherla Java Developer from Hyderabad
  • 500049 Hyderabad Freelancer in
  • Graduation: Master of Technology
  • Hourly-/Daily rates:
  • Languages: English (Full Professional)
  • Last update: 07.04.2020
KEYWORDS
PROFILE PICTURE
Profileimage by Revanth Tummalacherla Java Developer from Hyderabad
ATTACHMENTS
Resume - Java, Microservices, Telecom

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SKILLS
I am Senior Java Developer / Solution Architect with extensive Systems Integration, Product Development, Data Migration and Performance Engineering expertise.
I have good knowledge of Restful microservices, databases and algorithms.
Currenly working on all projects in Agile methodology, though earlier projects were in Waterfall model.
I am inclined in uisng the latest frameworks and libraries in my projects and thus experiment with latest features and avail full potential.
In my 12 years of working experience, I worked mostly as Developer, 2 years as Solution Architect, 3 years as Testing Engineer, 1 year as Data Migration and 1 year in Performance Engineering.

Following are the tools and technologies that I have expertize on:
Telecom Software Comverse One Billing System v3.5, Comverse Kenan FX Billing System v11.7
Operating Systems Linux/Unix, Windows, MS-DOS
Java/J2ee Core Java, JSP, Java 8 (streams, collections, lambda)
JDBC, XSL, Hibernate, Spring - MVC/Batch/Boot/Security,
Mule-ESB, JAXB, JAX-WS/RS, JFreeChart, JExcelAPI, RestAssured
Tomcat, Mule, jBoss
Databases Oracle-9i/11g/12c, MySQL v5+, Cassandra
(SQL, PL/SQL, Triggers, Cursors, Packages)
Scripting Languages (not expert, but intermediate level) Perl, Python, Groovy, Jasper Reports
UI/Web Technologies Android, HTML, WSDL, XSLT, CSS, JavaScript, Swing, AngularJS (1.5,TS 2+)
IDE/Tools usedAutoIt, Toad, PL-SQL Developer, Putty, SSH, Reflection 
Eclipse, NetBeans, Mule Studio, JMeter, WinScp, Selenium
SonarQube, ElasticSearch
Workpoint, jBPM, Oracle BPEL
SVN, GIT, Sourcetree
Atlassian - Jira, Bamboo, Jenkins, Hudson
PROJECT HISTORY
  • 07/2019 - 04/2020

    • Virtusa - Lloyds Bank
    • 5000-10.000 employees
    • Internet and Information Technology
  • Architect, Senior Developer
  • Replacing commercial product with custom implementation, to reduce recurring cost.
    Enhancements to existing system.
    Integration to central data-store and handling all scenarios for 24x7 operation.

  • 04/2012 - 04/2019

    • Diksha Technologies
    • 250-500 employees
    • Internet and Information Technology
  • Technical Lead, Senior Developer
  • Integrating Telecom/Banking systems to external systems.
    Customization and Development of Telecom/Banking systems to suit to customer needs.
    Automation of testing and routine tasks.

TIME AND SPATIAL FLEXIBILITY
I currently do not have an active Visa, hence cannot travel to EU region for next 3 months.
Hence I need to start working remotely, from India and upon receipt of Visa, can immediately travel to work location.
I am available for working 40 hours per week.
OTHER
12 years of experience in Software Design, Development and Support with expertise in working across variety of systems and technologies.
Currently working as Solutions Architect / Technical Lead, guiding Product Engineering Development team.
Expert in developing PL/SQL procedures and UNIX scripts for creating reports and for data-migration.
Experience in designing tools to monitor availability / status / performance of various systems and monitor them using simple graphs and charts.
Expert in integrating different systems with Telecom Billing and Ordering systems using Java, REST, SOAP, Web Services, microservices, JAXB and DWH.
Expert in Kenan Billing System– Customer Center, Order Management, Inventory Management, Workflow, Application Integrator and Workpoint.
Expert in Business Process Management –Workpoint BPM. Experience in jBPM.
Experience in estimation of functional-feasibility and system-impact for enhancements on live system.
Experience in driving end-to-end software life cycle from impact-analysis, development, integration-testing and post-production support.
Proficiency in identification and rectification of functional gaps and bottlenecks, while automating routine tasks and doing Performance Engineering.
Experience in maintaining servers for prepaid rating and signaling in Comverse C1 Converged billing suit.

PROJECT INVOLVEMENT
Cloud Services for PAAS (Platform As A Service)
Duration    : October 2017 to present
  1. Implementing microservice architecture on cloud for multi-tenant application architecture
  2. Implementing user-authentication and role-management using Spring Security
  3. Implementing user-notifications and group-management using Google FireBase
  4. Implementing string search support using ElasticSearch
  5. Migrating existing applications to cloud compliant microservice architecture, using SpringBoot on EC2
  6. Migrating existing Oracle/MySQL databases to cloud based sql/no-SQL databases
  7. Implementing AWS Lambda, IDM roles and relevant configuration
  8. Implementing Data processing engine on cloud, using Apache Cassandra as database
  9. Implementing custom Licensing module for configurable purchase options
Systems Integration
Duration    : February 2017 to September 2017
  1. Implementing Spring Batch jobs, for importing and exporting data across various systems, so that they all are synched with same dataset.
  2. Payment transaction details from Authorize.Net and Do-Not-Call registry from Gryphon are imported into the billing system for auditing and implementing legal obligations.
  3. Developing pl/sql data migration scripts between billing systems.
  4. Implementing AWS Lambda functions in Spring, to interface with other systems and dynamo db.
  5. Implementing Spring Boot layer for integrating Elastic Search engine
Build and Deployment Automation
Duration    : December 2016 to January 2017
  1. Implemented Jenkins Continuous Integration platform for automatic build and deployment of projects.
  2. Implemented SonarQube code profiler for evaluating code quality and performance of java projects.
  3. Involved in designing the tool to monitor availability of multiple applications running on mule, JBoss and/or Tomcat, across different environments setup.
  4. Involved in developing scripts to monitor System Performance (load, stress and fault analysis), auto-correlation of errors to bugs filed in Jira and to deliver email alerts with charts depicting project progress across different environments.
Workflow Modeling for Telecom backend Business Process
Duration : June 2016 to November 2016
  1. Developing process flows and related scripts for existing Workpoint BPM server.
  2. Setting up jBPM server for new process flows.
  3. Developing process flows and related scripts for new process flows in jBPM server.
  4. Involved in doing Proof-of-Concept using Oracle-BPEL BPM engine.

Kenan Billing integration – Workflow/AI customization
Duration : June 2015 to June 2016
  1. Involved in configuring Kenan GRS workflow.
  2. Involved in customizing Kenan Application Integrator.
  3. Involved in developing SQL, PL/SQL and UNIX scripts that are used in workflow, re-provisioning and for ad-hoc tasks in integrating to provisioning/thresholding/taxation/rewards/mediation systems.
Integration of Kenan Billing to Amdocs Billing
Duration    : October 2014 to March 2015
  1. Mapping the order and profile entities across the two different billing systems.
  2. Designing the interfaces, parameters and payload to be exchanged.
  3. Developing framework in java web services for modular integration.
Integration of Workpoint to Metasolv
Duration    : April 2014 to September 2014
  1. Identifying the parameters required by Metasolv mediation system.
  2. Designing the interfaces, parameters and payload to be exchanged.
  3. Developing framework for Java based SOAP interaction with Metasolv web services.
  4. Developing Workpoint process flows and related scripts.
Cycle30 Mobius Billing System - BIL Integration Layer
Duration    : February 2013 to March 2014
  1. Involved in designing and developing BIL integration framework, for external systems to interact with Cycle30 Mobius billing system.
  2. Involved in automation of build and deployment processes through Jenkins.
  3. Involved in upgrading application containers and relevant refactoring.
  4. Involved in Performance Analysis and Performance Tuning of application and database.
  5. Involved in designing the tool to graphically monitor availability of multiple applications running on mule and JBoss, across different environments setup.
  6. Involved in developing scripts to monitor System Performance (load, stress and fault analysis), auto-correlation of errors to bugs filed in Jira and to deliver email alerts with charts depicting project progress across different environments.
Kenan billing system - LWO integration layer
Duration : April 2012 to December 2012
  1. Involved in customizing LWO-framework for using Kenan (postpaid billing system).
  2. Involved in configuration and customization of GRS Workflow and Application Integrator.
  3. Developed SQL, PL/SQL, UNIX and Perl scripts for workflow, provisioning, reports, ad-hoc tasks and for integration to provisioning/thresholding/taxation/rewards/mediation systems.

Comverse One – Prepaid Application Support
Duration    : December 2010 to March 2012
  1. Involved in end-to-end monitoring / maintenance of services on all prepaid servers / databases.
  2. Involved in trouble-shooting Comverse One - Order Management, Inventory & general configuration.
  3. Performed bulk operations like inventory-loading/provisioning/update-F&F.
  4. Involved in developing SQL, PL/SQL and UNIX scripts for creating reports and performing routine tasks.
  5. Identified and rectified functional gaps and bottlenecks in scheduled/ad-hoc jobs.
  6. Estimated system-impact and functional-feasibility for enhancements and change requests.
  7. Involved in deployment of enhancements.
  8. Automated routine tasks and Performance Engineering for optimization of the system.
Kenan Billing – Development and Production Support
Duration    : October 2007 to November 2010
  1. Involved in extensively customizing Customer Centre GUI and the related configuration.
  2. Involved in design / development of ‘CTM Portal’ as single interface to Kenan and other systems.
  3. Developed ETL scripts for migrating legacy EPOS system into Kenan Billing system.
  4. Prepared and executed test-plans for Change Requests.
  5. Tested various patches that are delivered from Comverse (provider of Kenan billing system).
  6. Involved in production support for the existing enhancements in Kenan system.
  7. Involved in trouble-shooting Kenan - Order Management, Inventory and general configuration.
  8. Identified and rectified functional gaps and bottlenecks in scheduled/ad-hoc jobs.
  9. Estimated system-impact and functional-feasibility for enhancements and change requests.
  10. Automation of routine tasks and Performance Engineering for optimization of the system.
TRANINGS ATTENDED
Program / CourseCourse Coverage
PAAS Design Architecture and Implementation Insights to designing a Platform-As-A-Service
TM Forum Open Digital Program Standards for API development on open digital ecosystem to provide flexible and optimum interfaces with multiple Systems.
Telecom Convergence Convergence of Operations in Telecom industry with multiple Systems and Standards.
Convergent Billing Prepaid/ Post-paid/ Convergent Telecom Billing architecture & operations
Telecom Domain Internals Prepaid Billing and Telecom flow using SS7
Performance Engineering Performance Engineering and design-optimization
Oracle (OCA) Oracle – Basics, SQL, PL/SQL
ILP (Initial Learning Program) Design and Coding standards in Oracle, Java and J2EE
Internship Design optimization & implementation of digital systems (Verilog, JPEG2000)
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