Aug 2019 – Jun 2024 · 4 yrs 10 mos · Hyderabad, Telangana, India · On-site

• Enhanced the trading system's messaging layer fault tolerance by improving reconciliation between primary and failover message storage.
• Scaled Kafka cluster from 6 to 96 brokers on cloud, on-boarded 20 teams with multi-tenancy, data privacy and auto scaling using cruise control.
• Designed and led implementation of highly scalable, available and resilient micro services on cloud:
• State recovery service for applications data in Kafka, reducing recovery from crash to 9 sec from 15 mins.
• Conflation service to provide back pressure measures for down stream Kafka consumer applications.
• Consumer lag alerting service for alerting lagging downstream Kafka consumer applications.
• Subscription manager service using Flink, Calcite and GraphQL saving $100k in KsqlDB license costs.
• Self-service Kafka dashboard to help teams access, view and manage their resources in a multi-tenant model reducing ops overhead and quick on-boarding.
• Secure CDC by implementing Authenticated Encryption with Key Identification and AES-GCM using JCE.
• Add Kerberos authentication to Kafka Connect and integrate with Apache Camel connectors.
• Re-architected trading infra alerting system, reducing latency and preventing outOfMemory crashes.
• Designed and developed framework to collect & aggregate metrics from Node.js web clients.
• Migrated from RBAC to ABAC based authorization model.
• Designed and led the implementation of intern management system covering on-boarding, evaluation and analytics of 500 interns each year.
• Mentored junior developers in boosting their technical skills and productivity. Successfully promoted three interns to senior technical roles.

Apr 2018 – Jul 2019 · 1 yr 3 mos · Bengaluru, Karnataka, India · On-site

• Chronos: Designed and built a resilient and scalable microservice deployed on AWS for tracking and monitoring fleet and shipments. It required gathering business requirements from various stakeholders such as ops, users and business teams. Chronos enables scheduling and cancellation of tasks created by the backend business logic implemented using Kafka streams and event driven architecture. A delayed queue implementation over Kafka is required to build this service was designed and built using Kafka, Redis based Redisson and Timescale db.
• SSO: Develop, design and implementing Oauth2 authorization flows in core platform Single Sign On
• (SSO).Implemented master slave architecture of OpenLdap to support SSO failover.
• Technologies: Redis, Redisson, Java8, Spring Boot, Hibernate, TimeScaleDB, Kafka, Kafka Streams,KafkaConnect, Avro, Kafka Schema registry, OpenLdap, Prometheus, Telegraf,SSO, Dynamo Db, OAuth, JWT

Aug 2015 – Apr 2018 · 2 yrs 8 mos · Greater Stockholm Metropolitan Area · On-site

• MediationZone is a high throughput reliable real-time distributed data processing workflow engine deployed in production by telecoms. I was part of the team that designed and implemented System insight feature which gathered metrics, i.e, latency, custom user metrics and throughput of workflows running parallelly on many ECs(Execution containers). Used Akka actors to gather metrics and aggregate them over configured interval and store in influxdb, then display on Grafana.

Nov 2014 – Aug 2015 · 9 mos · Frankfurt Rhine-Main Metropolitan Area · On-site

• Develop and enhance Trading platform with focus on low latency,high speed execution and high availability.
• Technologies: Core-Java, Chronicle, Hibernate, Spring, Eclipse, SVN, Python, Low Latency Focussed Engineering, Distributed Transactions,Concurrency.

Jan 2014 – Oct 2014 · 9 mos · Greater Stockholm Metropolitan Area · On-site

• Design and Implementation of Distributed Algorithms to enable file-system snapshots for Hadoop Distributed File System(HDFS) in Hops. Java, Git, MySql NDB Cluster, Junit, Jeinkins, Mockit,Netbeans,Intellij, Distributed Transactions
• http://www.hops.io/

Mar 2012 – Aug 2012 · 5 mos · Greater Hyderabad Area

• Developed middle ware for Mobile Poker, Develop simulation environment for Desktop Poker Applications.
• Technologies: Android, JAVA

Feb 2011 – Mar 2012 · 1 yr 1 mo · Greater Hyderabad Area

• Developement of product in Oracle Fusion which facilitates both inter and intra corporate financial transactions
• Technologies: JAVA, SOA and ADF.

Jul 2010 – Jan 2011 · 6 mos · Greater Bengaluru Area

• Developing features in IMS feature server. Debug, Fix and FIT(Feature Integration Test) on existing features in IMS-S-CSCF.
• Technologies: C, SIP

Jun 2009 – Dec 2009 · 6 mos · Bengaluru, Karnataka, India

• 1. Development of utilities for search analytics using Pig(Hadoop) Platform.
• These programs will give the metrics about various aspects of sponsored search.
• 2. Developing programs in JAVA using Map-Reduce programming paradigm