Apr 2018 – Nov 2018 · 7 mos · Noida Area, India

Apr 2017 – Apr 2018 · 1 yr · New Delhi Area, India

• Have following systems to look upon:
• Content Management System, Inventory Management System, User Management System, Flight Integration System, Hotel Integration System, Order System, Supplier Payments System

Sep 2015 – Mar 2017 · 1 yr 6 mos · New Delhi Area, India

• Joined the startup from the start. Major contributor in the initial understanding of travel domain and defining fundamental building blocks and architecture of the system.
• Conceptualized and designed content ingestion system (CIS) framework, where other developers can easily develop business operations like content creation, updation and inventory pricing updation of hotels, flight, transfer and activities. Around 65 such business operations were built by other devs in no time.
• Technologies : Java, Spring, Hibernate, Quartz, Tomcat, Mysql
• Developed Flight ecosystem, that can serve local supplier inventory & pricing as well as integration with live supply like MMT, GoIbibo & TBO. Framework was designed to easily plug future integrations.
• Technologies : Java, Spring, Hibernate, Quartz, Tomcat, Mysql, RabbitMQ, MongoDb
• Designed and developed highly critical Order System that handles huge functionalities like order booking, payments, price & inventory validations, order edit, taxation, buyer invoices etc.
• Technologies : Java, Spring, Hibernate, Quartz, Tomcat, Mysql
• Designed and developed Supplier Payments system, that streamlines the payments to supplier, handling order edit, cancellations, payment cycle, payment policy and supplier invoices.
• Technologies : Java, Spring, Hibernate, Quartz, Tomcat, Mysql
• Developed in-house monitoring system for app, JVM and system monitoring
• Technologies : InfluxDb, Grafana, Telegraf, StatsD, Collectd

May 2014 – Aug 2015 · 1 yr 3 mos

• Content Management System
• Got to lead existing team of 10 developers
• Technologies : Java, Spring, Cassandra, MongoDb, ActiveMQ

May 2012 – Apr 2014 · 1 yr 11 mos

• Designed and implemented 'Communication Manager' from scratch
• This system could create subscriber segments based on user attributes and send personalized promotional newsletter with content also being dynamic based on user
• Spam prevention : Rules engine based conflict resolution in case of multiple emails are scheduled and per user per day limit can be set
• Scale : 1M promotional emails are sent daily. Design is horizontal scalable.
• Technology : Java, Spring, Mysql, MongoDb, ActiveMQ and DROOLs.
• Scaling Inventory Pricing System (IPMS)
• IPMS is the core component, which handles inventory pricing updates and serves
• Responsible for doing POC and finding suitable NoSql to replace existing MongoDb that couldn't scale because of slow reads during parallel writes. Did POC on various NoSqls like Couchbase, Memcache, Cassandra, Ehcache (BigMemory Go & Max), Redis and Aerospike
• Integrated with Aerospike and achieved 50K reads/sec (99 percentile 4ms) with 10K writes/sec

Jun 2010 – May 2012 · 1 yr 11 mos · Hyderabad Area, India

• Worked with Customer Returns team.
• Customer Returns is a worldwide business
• and technology unit encompassing the entire returns process from our Online
• Returns Center on retail websites, to transportation solutions for return shipping,
• to processing replacements and refunds for customers. It starts with the customer
• and work backwards to make the returns process as quick and easy for customers
• as their Amazon.com purchasing experience.
• Owned RHEL3 to RHEL5 migration for all the hardware used by our services, with zero
• downtime within a month of joining.
• Owned C++ to Java migration of the core services along with the data model redesign
• Worked on features like 'Exchange', 'Instant Refund', 'Sorting return packaged based on category' etc

Jun 2009 – Jul 2009 · 1 mo · Hyderabad Area, India

• Interned at Microsoft Dynamics CRM team.
• Created CRM dashboard designer desktop application in C# with CRM SDK 5.0. This tool helps create dashboard on CRM using simple drag and drop.