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jencymaryjoseph/README.md

Hi πŸ‘‹, I'm Jency Mary Joseph

I'm a Software Engineer passionate about building scalable backend systems, distributed architectures, and database technologies.

I recently completed my SDE Internship at Amazon Web Services (AWS), where I worked on the AWS SDK for Java v2. My project focused on enabling S3 Presigned URL Downloads (Async) with multipart support, closing a long-standing feature gap for customers migrating from v1 to v2.

Currently, I'm pursuing my Master’s in Computer Science at the University of Southern California (USC).


πŸš€ Recent Projects & Work

  • AWS SDK for Java v2:

    • Implemented Presigned URL GET operations (Async) with retry/error-handling support.
    • Built multipart download infrastructure using HTTP Range headers and async concurrency.
    • Enhanced S3 Transfer Manager with extensible progress tracking and parallelism.
  • chatDB – Interactive SQL/NoSQL query assistant powered by natural language.

  • iOS Stock Trading & Search Application – iOS client with Node.js backend for real-time market data.

  • Learned Cardinality Estimator for DuckDB – Research project exploring ML-based query optimization.


🌟 Highlights from AWS Internship

  • Delivered Presigned URL Download API for Async S3 Client.
  • Designed & implemented multipart presigned URL download support with concurrency.
  • Contributed PRs to the aws/aws-sdk-java-v2 repo, improving developer experience and cloud storage performance.

πŸ“‚ Notable Repositories


🀝 Connect With Me


πŸ“Š GitHub Stats

Jency's GitHub stats
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Always exploring ways to make cloud development faster, simpler, and more reliable ☁️

Pinned Loading

  1. learned-cardinality-duckdb learned-cardinality-duckdb Public

    C++ 1

  2. chatDB chatDB Public

    Interactive application to query SQL/NoSQL databases with natural language.

    Python

  3. iOS-Stock-Trading-and-Search-Application iOS-Stock-Trading-and-Search-Application Public

    Developed an iOS Stock Trading and Search Application with a Node.js backend, deployed on Google App Engine for real-time market data. Integrated Finnhub API and Highcharts for data visualization, …

  4. aws/aws-sdk-java-v2 aws/aws-sdk-java-v2 Public

    The official AWS SDK for Java - Version 2

    Java 2.4k 936