Shubham Roy Ghatak

Project : Enterprise A/B Testing or Experimentation Platform

• Key contributor towards architecting and developing an experimentation engine for enterprise to simplify core aspects of experimentation for a vast array of e-commerce use cases including both client-side and server-side A/B Testing.
• Built audience targeting or segmentation engine designed to withstand a gigantic peak scale of 3 billion hits per day at sub-20ms latencies.
• Built audience bucketing engine to sample and split traffic towards variations of an experiment using fined tuned randomization algorithms with extreme accuracies.
• Designed distributed caching and concurrent in memory data structures to improve application performance.
• Involved in rigorous performance engineering including thread dump, heap dump and garbage collection profiling.
• Actively participated in all production DevOps activities including CI/CD lifecycles, release deployments and monitoring.
• Demonstrated exemplary skills in ownership, team mentoring, cross-team collaboration and leadership.

Project : Enterprise Cart and Checkout

• Led key architecture transformation to migrate a huge monolithic system to a microservices based architecture.
• Built the foundation of migrating all the cart and checkout aspects on a fully reactive stack on Spring Web flux.
• Involved in data modelling of key data entities including cart, cart items, checkout, orders and establishing communication patterns with price, inventory, product detail and payment services.

• Functioning as module lead, led team of 3 developers to deliver sightseeing tours booking feature as part of Kuoni GTA new-gen marketplace platform.
• Ingested product feeds from 3rd party Icelandic tourism company "Bokun" who sold their tourism products on Kuoni's marketplace platform.
• Developed decoupled architectures to integrate with any kind of 3rd party providers for future without impacting core platform capabilities.
• Enabled GTA to sell hop-on, hop-off tours and sightseeing products seamlessly on the platform.
• Delivered the solution in record time which was at least 20 days prior to the projected delivery date.
• Mentored and upskilled at least 2 developers in the process.