User Configurable Business Process Workflow Tool

• Led 0 to 1 development of business process workflow builder and orchestration system

• Built Proof of Concept and evaluated features and performance of orchestration engines

• Engineered system using Kubernetes, SQS, Postgres and GraphQL

• Architected process trigger system to process system events in under 1 ms

• Scaled system to handle 1000s of concurrent and interconnected executions

• Provided architectural review for multiple teams looking to integrate with business process builder

• Created proof of concept of translating process descriptions using generative AI using GPT-4o

Observability

• Led development for reusable package for logging and tracing and drove adoption across various teams

• Reviewed and updated standards for collecting metrics and alerting

Aggregator API

• Spearheaded development of internal Aggregator API using GraphQL, Redis and Postgres

Escrow Operations Application

• Led team spread across multiple countries and timezones

• Built REST micro services and GraphQL APIs to create and manage transactions from scratch

• Created event-driven architecture using SQS, Dynamo streams and Lambda

• Designed search system using Elasticsearch

• Architected Role-based Access Controls using Cognito

AWS-based Checkout Application (Checkout 2.0)

• Built the application scratch using AWS Lambda, Step Functions, AppSync, SQS, DynamoDB, etc. and began supporting 3% of events.

• Integrated 3DSecure into Checkout 2.0 ancrease Checkout 2.0 event coverage from 3% to 15%.

• Designed highly scalable payment processing workflow for Checkout 2.0 to reduce load on less scalable legacy systems. Currently, 100% of transactions on Checkout 2.0 use this flow.

• Added better traceability for all purchases on Checkout 2.0.

• Enabled third party parking sales on Checkout 2.0 and increased event coverage for Checkout 2.0 from <25% up to >45%. This laid foundations for non ticket sales on the platform.

• Led a team of 6 engineers, across multiple locations and timezones, dedicated to performance and operations.

• Increased parallelization and caching at several crucial points in the application flow to improve run times by up to 20%

• Integrated with internal bot-protection system to enable high-volume onsales to be sold on Checkout 2.0

• Added support for open tracing in Checkout 2.0 by integrating with LightStep

• Upgraded all Checkout 2.0 Lambdas from Java 8 to Java 11

• Collaborated with teams across the organization to build centralized dashboard to monitor performance and health of Checkout 2.0 and all its dependencies

• Enhanced Checkout 2.0 REST API used for admin purposes by adding multiple new endpoints to support wider Checkout 2.0 rollout

Ticketmaster API Access for Partners

• Automated order remediation process and reduced manual work after large onsales from several days to a few minutes

Commerce Orchestration Platform

• Improved reliability and response times for various components by implementing fast*fail mechanism using Hystrix

Market Risk Simulation Application

• Developed and maintained Java application to simulate market risk on >10GB data

• Optimized application, improved computational efficiency; reduced runtime by up to 50% for some simulations

• Designed schema and maintained hyper*parameter database for regulatory report generation

• Debugged and fixed recurring bug in report generation; reduced manual work by up to 10% every month

• Automated generation of internal report; reduced manual work by up to 5% every month

Cash Transfer Monitoring Application

• Developed and maintained Java application to monitor firm-wide interdepartmental cash transfers

• Built Java RESTFul service to process data from >10 new sources; extended application scope by 1 department

• Wrote JUnit tests; improved code coverage by 30%

• Upgraded database from Sybase 12 to Sybase 15

• Implemented proprietary Java framework to unify major cash management workflows

• Participated in Agile Development using SCRUM and code reviews