Resume

Education:

• M.S. in Computer Science from University of Texas at El Paso, in May, 2011

  • Theses: Decentralized fault tolerant caching with Memcached – Improving fault tolerance in memcached with membership protocol, increasing availability in case of partial failure. It is prototyped in Python.

•  B. Tech in Computer Science & Technology from W.B.U.T. Kolkata, India, in June, 2007

  • Project: C-to-Java translator (won best project award) – A language translator to help developers convert C sources to Java, with Command line, Desktop GUI and Web-based access for conversion. Using C, JAVA, VB and JSP.

Work Experience:

• Software Engineer III, PayPal (Nov 2016 - current)

  • Architecting components on next generation payments’ platform

  • Leveraging microservices with event sourcing, CQRS design pattern

  • REST services on new payments’ platform serving billions of requests/day

  • Batches for exchanging files between PayPal and partners

  • Event queues for acting on real-time payments’ events

  • Common components, infrastructure, and tools based on standard and best practices

  • Solutions to integrate with internal and external partner

  • Experience: java, spring, couchbase, rocksDB, elasticsearch, oracle, REST

• Software Engineer II, Bazaarvoice (Sep 2013 - Sep 2016)

  • Worked on core application that served 9B requests/month

  • Performing code reviews on other team members' code

  • On-call support for production servers

  • Developed additional functionality for our flagship product

  • Developed new tools to assist in migrating clients between platforms

  • Experinece: java, dropwizard, elasticsearch, REST, json

• Software Engineer II, Intuit (Jun 2011 - Sep 2013)

  • Worked on public facing Intuit Payment Network (IPN) & internal payments API

  • Delivering production ready code, test suite, documentation and support

  • Participating in code review, technical feasibility, design decision and project goals

  • Keeping up to date with emerging technologies

  • Providing input to technical design specification and optimizations

  • Reduce bottlenecks by communicating cross-team dependencies

  • Experience: java, spring, groovy, grails, mysql, ehcache, REST, json

• Research Assistant/Teaching Assistant, Dept. of CS, UTEP (January 2009 – May 2011)

  • Involved in numerous research projects and Linux lab administration

  • Building a fault tolerant distributed caching service for high performance web-services

  • Teaching the lab sessions of Arch-1, involving C and Assembly programming in MSP430 microcontroller

  • Experience: C, Java, Python, Linux administration, Assembly language, MSP430 microcontroller

• Programmer Analyst, Cognizant, Kolkata, India (July 2007 – December 2008)

  • Worked with one of the major clients of Cognizant, JPMorgan Chase, in EOS-CST team

  • Correspondence Redistribution Utility – Java, PRPC, Unix

  • Work-Object URL Attachment Handler Utility – Java, Oracle, Unix

  • iVault Services Library Source upgrade to 1.6 – Java, Unix

  • Image-Servlet Document Retrieval and Display Utility – Java, Oracle, Unix

  • CRA RSI & CSX Message Server Source upgrade to 1.6 – Java, Unix

  • Correspondence Merger Utility – Java, Oracle, Unix

  • Backend Database Maintenance Utility – Java, SOAP/XML, Oracle, Scripting, Unix

  • Experience: Java, SQL, XML, Shell scripting, UNIX

Projects:

• Data-Recorder (summer third-party project during master’s, 2009) – High-performance recorder subsystem designed to capture and store data (UDP) packets, in dedicated customized file system. Implemented in C & Python.

• Intranet Portal (summer internship project during bachelor’s, 2006) – An Intranet portal for faculty, students and others, with authenticated access to various kinds of academic resources. Using HTML, JSP, JavaScript, AJAX, MySQL.

• Academic Projects (Undergrad and Grad) – Using C, Java, Python, JSP , PHP/MySQL, LAMP, AJAX, VB, .NET, SQL, JavaScript, etc. Some of them are listed below,

- Online Shopping Cart,                                       - JaRBAC – An RBAC library in Java,

- Chinese-Wall simulator,                                   - Cryptographic Communication,

- Brute-force password cracker,                      - Library Information Management System

Publications/Workshop Presentation:

• Eliciting Intuitive Understandings of Binary Operations in a First Course on Computer Organization, by Eric Freudenthal, Bivas Das and Avranil Tah - Frontiers in Education Conference, October 2010

• VPAF: A Validated and Prolonged Authentication Framework, by Eric Freudenthal and Bivas Das – In Proceedings of Collaboratecom: International Conference on Collaborative Computing , November 2009

• Virtualized Network Teaching Laboratory, by Eric Freudenthal, Frederick Kautz, Bivas Das and Luc Longpre – In Proc. of ASEE Annual Conference and Exposition, June 2009

• 7th UTEP/NMSU Workshop – Reliable and Fault Tolerant Distributed Caching using Memcached, Apr, 2010

• 6th UTEP/NMSU Workshop – Modularized Trust-Management for Distributed Coalition Environments, Nov, 2009

Computer/Programming Skills:

Experienced: C, Java, Python, SQL, Shell Scripting

Well Acquainted: C++, PHP, JSP, Visual Basic, .Net

Development Environment/Database Application: Microsoft Visual Studio, Netbeans, Eclipse, and MySQL, Oracle, Microsoft SQL

Platform/Productivity Packages: Linux, Windows and OS-X, and MS Office, Latex, SVN, etc.

Other Information:

Visa Status:  H1B, since Oct-­‐2011