Biplov D.

About Biplov D.

I like working in small groups that can stay organized and move quickly. Right now I do web applications. I\'m very interested in Python, especially Flask and SQLAlchemy.

Experience

1. Software Engineer

   Amazon

   Jan 2024 — Present · San Francisco, CA, US

   Architected and developed PowerBox, a full-stack experimentation platform enabling data-driven A/B testing across Amazon\'s grocery business units (Whole Foods Market, Amazon Fresh)* Designed and implemented RESTful APIs using Python/AWS Lambda with secure authentication via AWS IAM and custom authorization middleware, supporting 100+ concurrent experiments* Built scalable serverless backend using AWS services (DynamoDB, S3, Step Functions, EventBridge) with event-driven architecture for automated experiment lifecycle management* Developed modular data access layer with repository pattern, implementing efficient pagination and filtering for DynamoDB operations across 10+ tables* Implemented comprehensive experiment management system supporting multiple business types, regions, and custom success metrics with guardrail monitoring* Designed flexible data models using Pydantic for experiment designs, event analysis, and custom group management with complex validation rules* Built automated workflows for experiment activation, daily evaluation triggers, and user notifications using Step Functions and scheduled Lambda functions* Integrated with AWS QuickSight for embedded analytics dashboards and implemented secure file upload/processing for CSV-based site management* Established CI/CD pipelines using AWS CDK for infrastructure as code, ensuring consistent deployments across dev, beta, and production environments