Jan 2022 – Jul 2022 · 6 mos · Pune, Maharashtra, India · Remote

• Coached multiple teams over Domain-Driven-Design, Trunk based development and leveraging AWS Cloud managed/non-managed resources for developing distributed systems.
• Mentored a team which leveraged AWS Kinesis streams, AWS Amplify and AWS pinpoint to develop a real time customer engagement system. KCLV2 library was used in a Quarkus + GraalVM based application to consume the kinesis streams to handle customer events as a real time stream.
• In an individual capacity
• 1. Developed a Parser/Generator for CIBIL TUDF/TUEF files in Python, which can parse/generate variable length and fixed length text records.
• 2. Wrote an ANTLR4 based rule language for evaluating task chains. The generated rule chain was used as a module in complex LOS workflow evaluations.
• 3. Developed the colending modules for splitting up existing or new colended loans parameterised on different criterion.
• 4. Customised Fineract for handling colending loans by updating different modules.
• 5. Developed a django based portal for managing colended loans supporting multi-tenancy.

May 2021 – Dec 2021 · 7 mos · Pune, Maharashtra, India · Remote

• Notable work:
• #1
• Developed a solution to expose Partner APIs over AWS API Gateway along with different ancillary scripts written in Python and Shell script. The solution is written in AWS cloud formation, which leverages AWS cognito pool for user authentication/authorization.
• #2
• Designed and developed the workflow service with a team of two engineers, which runs the loan origination system workflow declared as AWS Step-functions over different µ-services. The service is developed using NodeJS/Express which uses serverless to create the AWS Stack.
• The AWS stack comprises of
• 1. AWS Step-functions for running the business workflows.
• 2. Leverages AWS SNS/SQS mechanism for reliable at least once delivery of the messages
• 3. Uses AWS DynamoDB for persisting task states and application state changes
• #3
• Developed CI/CD pipelines for machine learning models available as docker images of AWS -lambda and Python Django.
• 1. The pipeline for AWS -Lambda based docker images is developed using AWS CDK’s Pipeline, with self updating mode to deploy the latest version
• 2. The pipeline for Django based docker images is developed using AWS CDKs CodePipeline, which also updates itself to deploy the latest version.
• 3. Entire stack including the API gateway and other resources are deployed using AWS CDK with TypeScript
• #4
• Wrote a heuristics based service over REST/HTTP, which can be used to run A/B experiments,
• select parameters on the basis of configured heuristics act as a distributed semaphore by exposing self-expiring locks to avoid starvation
• The service is developed using Elixir/Cowboy and leverages KeyDB as a persistent store. The service has a usual response time of 20 milliseconds under a load of 10000 requests over a minute with a concurrency of 100 on just a single instance deployed as a K8S POD.

Dec 2019 – Apr 2021 · 1 yr 4 mos · Pune, Maharashtra, India · Remote

• Developed a credit-card PaaS, which connects different card processors with partners. It is an event sourced system developed through modelling different domains as micro services. The platform provides a partner to launch cards on VISA/Mastercard with different card processors. A cloud native platform, which is developed using different services available on AWS.
• I led a team, which worked on different business areas like users, accounts, cards, payments, statements, notifications etc.
• 1. Developed domain micro-services in Python using  Django/Flask, which model the lifecycle of entities.
• 2. Developed  gateway micro-services, which connect to different processors and facilitate inbound/outbound communication through both synchronous (REST) as well as asynchronous (events) way. These services are developed in Elixir using Plug-Cowboy and Broadway.
• 3. AWS SNS/SQS is used for event streaming and different lambdas are used to orchestrate the incoming events to different services.

Dec 2018 – Nov 2019 · 11 mos · Pune Area, India · Remote

• Developed various micro-services and APIs for catering functions like loan product management, handling user journey, underWriting as a service, lender as a service and integration with various merchants and banks for product offering and loan disbursement.
• These micro-services were developed in Java-8, NodeJS, Golang and Ruby on Rails. Fineract was used as a Loan management and origination engine. Drools was used for developing the underwriting engine.

Dec 2017 – Nov 2018 · 11 mos · Pune · Hybrid

• IDERA ADS 19.5 release
• I worked as a point of contact for delivery of various features covered in this release and led a team of 13 engineers to accomplish the same. These are support for MySQL-8 & MariaDB, Constant column support while importing data, Improving Query Builder, Various Database and tool enhancements.
• Also, as an individual contributor I implemented several features for improving VISUAL ANALYTICS
• Technologies: Core Java and Swing. Mostly algorithmic work

Sep 2016 – Jul 2017 · 10 mos · Pune Area, India

• Developed a cluster of micro services for a client in PLM business domain.
• These micro-services cater different functions like implementation of GraphQL on server side for bridging the complex custom XML query supported backend , authorisation using OAuth 2.0 / JWT and tracking changes for various entities in a PLM System.
• Technologies :
• Java 8, Spring Cloud, Apache Kafka, MongoDB; Javascript, RamdaJS, NodeJS and SideCar; Docker

Jun 2015 – Aug 2016 · 1 yr 2 mos · Pune Area, India

• Led an offshore team for development of a web based 'Airline Scheduling'​ application.
• The application helps airline executives to prepare the airline schedule efficiently. The development work involves schedule development according to IATA specifications (SSIM-7 / ASM-4 / SSM-5), application of publication rules, code-sharing and inline partnerships between airlines.
• I wrote the SSIM-7/ASM-4/SSM-5 parser/generator for preparing shared and individual airline schedules, which are code shared.
• Technologies:
• Ext-JS, NodeJS, MongoDB, Nools, (a RETE based rule engine in Javascript), 'Q' (Promise Library)

Feb 2012 – May 2015 · 3 yrs 3 mos · Pune Area, India

• Led an offshore team for developing 'Sheet/Workbook' application as a chrome browser's extension. It let's you view/edit MS-XLS/XLSX files in chrome browser.
• Notable work:
• Enhanced Formula recalculation engine, Improved document communication protocol layer, Developed a buffered I/O layer to implement auto-save functionality, developed JOffVis, an open source tool to detect anomalies in MS-XLS files
• Technologies:
• C++ based NaCl/PNaCl SDK & Javascript, HTML, CSS at the front end.

Jul 2011 – Jan 2012 · 6 mos

• Designed and implemented an enterprise application for managing SMS campaigns, which leverages SMS short codes allotted through a centralized registry .
• Notable work:
• REST services with a 'Command-Design' approach to facilitate loose coupling between F/E & B/E.
• Around 32 workflow to cover various business scenarios from short code provisioning to sunset.
• Web based tools to monitor workflow engine and updating BPMN(s) through GUI.
• Services/components to use ThreadLocal variables in some intricate cases with Activiti engine.
• Technologies:
• Spring, Spring-Security, Apache CXF, JPA/Hibernate, Activiti,

Feb 2010 – Jun 2011 · 1 yr 4 mos

• Developed a suite of maven plugins for rapid application generation backed by a SQL database schema. These plugins could be used to generate a complete web application in Spring with support for CRUD features.
• The generated application would have a F/E in SmartClient while a B/E with REST services in Spring. The application can later be enhanced/ customised by developers.
• Technologies:
• Google Guice, ASM, Maven plugin library, OpenJPA APIs, CodeModel, Spring, JPA/Hibernate, Apache CXF

Jun 2008 – Jan 2010 · 1 yr 7 mos · Gurgaon, India

• Developed portal for Hotel reservation using portfolio of Spring source frameworks.
• Worked over upgrading web services to use latest OTA schemas.
• Developed webservice clients for using IRCTC railway reservation services in middleware
• Developed and upgraded business rules in XDistributor to handle client / supplier integration.
• Expert level knowledge in working with XDistributor.
• Debugged and profiled legacy application code for enhancements.

Aug 2006 – Jun 2008 · 1 yr 10 mos · New Delhi Area, India

• I worked as a developer for car rental engine's web application. I had developed several modules for various business processes like yield management and discount processing. Worked over integration with various car suppliers across european market like SixT, Thrifty, national etc.
• Developed an automated system of Web crawlers which could fetch rates for various destinations from competitor websites for market analysis.