• Designed Databricks Spark jobs to perform data collection from Azure data lake, segmentation of data from parquet files, Pinot data ingestion from Azure blob to Pinot cluster.• Involved in the optimization of pinot table by experimenting with various indexing (Inverted, noDictionary, Star-tree) and effective schema upgrade, thereby reducing the segment size and boosted query performance by 75%.• Developed a Streamlit application using Apache Pinot with Presto to show the trends of Enterprise KPI metrics to assess the business impact of various stores and programs across different organization hierarchies. o Tools Used: Databricks, Apache PySpark, Python, Multi-threading, Presto SQL, Bokeh, Pandas, Docker, Azure Kubernetes Service.• Performed Proof of Concept on evaluating the efficiency of Azure blob (Blobfuse) and Azure VM, GCP Compute Engines, AWS S3 (Boto3), AWS S3 VAEX File Streaming, AWS EC2 Instances (Compute, Storage, Accelerated Optimized), AWS EBS (gp2, io2), AWS EFS, s3fs mount.• Designed columnar memory files (Arrow and HDF5) with various optimization methods and setup AWS EBS, EFS, and S3 Streaming using Boto3 for VAEX (Lazy Out of Core Computation) to efficiently run algorithms on billions of records and give prompt results.• Built a recommendation model for Market Basket Analysis using log-likelihood based Information gain (Binomial Distribution + Information Theory) and co-occurrence model (item-to-item collaborative filtering) to compute basket items affinity. o Tools used: Python, VAEX, PySpark, AWS Services, boto3, streamlit, plotly.• Involved in Pinot Cluster upgrade (v6.0.0), setup Pinot ingestion job, utilized Groovy transform to handle complex queries.

Project: Payment Card Industry - Business Operational Support System Role: Designer, Developer, Tester and Primary Support Project Details: It acts as a gateway controller for clients and manages the network elements to facilitate the operations of Payment Card Industry(PCI). This Application allows users to access the secured network which comply with the PCI Data Security Standard (PCI DSS) while accepting payments using payment cards, both online and in retail stores. Responsibilities: • Designing and Partitioning of disk file system in RHEL Operating System. • Developed a utility to perform DNS operations using Python and Shell Scripting. • Involved in creating a tool for on-demand backup of the device configuration using PERL, Shell Scripting, SNMP and ICMP protocols. • Engaged in making the Application GO-Live. • Involved in Unit and Integration testingEnvironment: Python, Perl, Shell and TCL scripting, RHEL Operating System, iTAM, JIRAProject: SDN Platform with Application Centric Engineering Role: Administrator and Primary Support Project Details: This system provides disaster recovery functionality which provides the capability to instantiate, monitor, modify, and revert network configuration when event occurs that causes a total disconnect between two adjacent PoP sites. Also, it provides provisioning of network devices. Responsibilities: • Implemented the post build configuration of the NSO platform introduced within the SDN framework. • Onboarding all Tail-f NCSs (Network Control Systems) onto NSO, WAE (Cisco WAN Automation Engine) • Network Package Installation and reloading, Upgraded Network Element Drivers (NEDs)on NSO Production servers. • Re-Configured High Availability (HA) on NSO server and reinstated the HA sync. • SSL certificate renewal and PostgreSQL Database License renewal. Environment: Software Defined Networking (SDN), RedHat OS, Python, Perl,NSO

Project: Access Governance Suite - Provisioning tool Role: Automation Developer Project Details: This utility will take care of access provisioning, status check, revoking of the application user account, and send the mail to the users automatically. This automation was developed to reduce the human effort to a greater extent. Responsibilities: • Involved in designing the tool and presenting the automation benefits to Clients. • Developed the utility using PERL and Unix Shell Scripting. • Configuration of mail system using Postfix Mail Agent in the Solaris Server. Project: Network Element Management SystemRole: Developer and Primary SupportProject Details:The application will provide secure login access via SSH/Telnet to the users and provides inventory details of network elements and perform configuration backup and arching of the devices in the network. Responsibilities: • Involved in development activities to accreditate the devices to adhere with the functionalities. • Developed a script to generate the report of the devices which are not reachable and a notification mail is sent via SendMail protocol. • Developed a file maintenance script to archive and prune old configuration files and log files in the file system on a regular basis which has been scheduled as a cron. • Involved in retrieving the details of network elements by polling and storing in flat files which is used by various downstream systems.Environment: Perl, Shell scripting, Solaris server

• Built a web application “Optimized transact honing” which optimize the end-to-end bank transaction and increase the reliability using PHP, MySQL, HTML and JavaScript and designed a gaming application using python.• Well versed knowledge in Open Source Languages and Database system.