Vishal A.
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Vishal A.

Hadoop, Spark & Cassandra Developer


Pune, India


4+ years of Experience in Big Data domain with tools like Hadoop (CDH ), Spark and other open source tools/technologies in Healthcare, Benefits and Ecommerce. Excellent Java development skills using Core Java, Servlets, JSP , JDBC, Java Beans. Substantial experience in writing Apache Spark jobs in Scala and MapReduce jobs in Java, Sqoop, Flume, Zookeeper, HBase and Hive . Hands on experience in installing, configuring and using ecosystem components like Hadoop MapReduce, HDFS, Hbase , Zookeeper, Oozie, Hive, Sqoop, Flume. Extensive experience in SQL and NoSQL development. Experience in data analytics using Apache Spark in Scala. Knowledge of Apache Spark SQL ... moreand Spark Streaming. Understanding of Big Data Concepts and Hadoop related technologies i.e. Hive,Sqoop, Flume, Hbase, ZooKeeper, Yarn, MapReduce, Apache Spark Extensive Object Oriented Development OOP/OOD experience. Experience encompasses software design, development and maintenance of custom application software. Strong database connectivity skills with MySQL, Access. Worked on Distributed/Cloud Computing using (Apache Spark,MapReduce,Hbase, Yarn,,Zookeeper, etc.) Working in implementing Hadoop with the AWS EC2 system using a few instances in gathering and analyzing data log files. Working on data using Sqoop from HDFS to Relational Database Systems and vice-versa. Working on Hive/Hbase vs RDBMS, imported data to Hive, partitions, indexes, views, queries and reports for BI data analysis. Developing data pipeline using Flume, Sqoop, Pig and Java map reduce to ingest customer behavioral data and benefits histories into HDFS for analysis. Worked on RDDs and aggregate functions applied on them to get the required results. Working as a Implementation Analyst for configuring the benefits and events based on the BRD documents and processing them Web Development: Involved in various phases of Software Development Life Cycle (SDLC) as requirement gathering, data modeling, analysis, architecture design and development of project. Designed UI using JSP and HTML and validated with JavaScript for providing the user interface and communication between client and server. Worked on XML schema and SOAP message. Developed business logic activities by developing business service classes. Involved in web development using RoR technologies. Worked on different gems for authentication, building role base systems. Worked on Integration with other api and consuming their apis e.g. Twitter , LinkedIn, Facebook and Instagram Worked on integrating different payment system with the web applications e.g. PayPal, Authorize.ent, Heartland , Braintree etc. Experienced in deploying the Rails web app to VPS server e.g. Linode, Digital Ocean, Amazon EC2 , Rackspace etc with the apache passenger and ngnix server. Worked on writing the deployment scripts and cron schedulers. Worked on Redis and elastic search . less

Vishal A. has added 3 portfolio pieces. Create an account to review them.

Work History and Feedback

  • Apr 2014 - Nov 2014

    Weekend Rails Developer
    Good communication and development skills. Looking forward to our next project together.
    4 hours
    $10.00 / hr
    $41.66 earned

  • Mar 2014 - Nov 2014

    Setup Rails Server
    Vishal was very helpful. He helped me and my team complete the project under budget and earlier than expected
    120 hours
    $15.00 / hr
    $1,471.11 earned

  • Jul 2014 - Aug 2014

    Ruby application bug fixes

    No feedback given

    $55.56 earned
    Fixed Price

  • Jul 2014

    Ruby on Rails expert
    great job!
    $55.56 earned
    Fixed Price

  • May 2014 - Jun 2014

    Migrate Redmine site to a new server
    6 hours
    $15.56 / hr
    $95.96 earned

  • May 2014

    HTTPS for Rails 4 applications
    Good! :-)
    $55.56 earned
    Fixed Price

  • View More (4)

Vishal A. has more jobs to show. Create an account to review them.


Name Score (out of 5) Time to Complete
Facebook Development Test 2.50 Top 30% 18 mins
Java Test v3 3.70 Top 30% 24 mins
What's the difference?

Work History

80% Job Success
689 hours worked
26 jobs


Less than 30 hrs/week
3 days response time


Phone Number: Verified

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