tiffany yung.

• Designed and implemented rules-based search indexing for a distributed document store built on DynamoDB and OpenSearch, enabling field-based routing rules that partition documents across dedicated indices to bound index sizes and improve query performance.
• Worked across the full backend stack — from data modeling to the search API — and partnered with senior engineers to design and ship the feature safely to production.
• Extended the search API with an optional rule-scoped query parameter for lower-latency targeted searches, while preserving full backward compatibility.

AWS · Java · DynamoDB · OpenSearch

• Expanded features of an AWS-native ticket and issue management API handling 130M+ daily requests, adding support for priority and label-based filtering to improve ticket triage and workflows.
• Implemented end-to-end changes through model, service, and datastore layers — including enum validation, duplicate-label handling, and event auditing — and partnered with senior engineers on API schema decisions across 7 ticket operations.
• Authored a technical design document, contributed to code reviews, and designed unit tests, integration tests, and canaries to validate API behavior across CRUD operations and failure cases for a safe two-phase production rollout.

AWS · Java · API Design · Testing

• Built an NLP-powered resume evaluation tool in Python that performs semantic analysis of keyword and action-verb usage to deliver actionable improvement recommendations to users.
• Developed a Pandas preprocessing pipeline to clean and tokenize job postings for training an LLM job search copilot.

Python · NLP

• Built BoilerCheck, a RAG-powered Q&A tool for Purdue policy docs — see projects below

Python · LangChain · Pinecone · Firebase · Gemini

• Led a 6-person team to ship a real-time celebrity news feed as a core component for a Social Stock Exchange platform.
• Implemented a web scraping and LLM pipeline using Axios, Cheerio, NewsAPI, and Gemini to ingest celebrity-related news articles and developed a ranking algorithm to surface trending topics based on trend velocity, entity mention frequency, and recency.
• Owned the technical architecture, project scoping, weekly sprint planning, and code reviews across the full stack.

Node.js · Axios · Cheerio · Gemini · NewsAPI · Supabase

• Built vision-guided robotics system for autonomous drumming using Baxter robot with AprilTag-based localization and spatial tracking.
• Processed camera input with OpenCV to detect AprilTags and compute 3D coordinates, translating targets into joint-space motions via inverse kinematics.
• Enabled dynamic recalibration and precise rhythmic strikes by integrating perception, motion planning, and ROS-based control pipelines.

Python · OpenCV · ROS

• Engineered robot localization and path-planning using AprilTag fiducial markers, odometry, and motion profiling to enable autonomous navigation, auto-aiming, and real-time pose estimation during matches.
• Spearheaded development of core robot subsystems including drivetrain, computer vision, and game-piece handling, applying PID and state-space control across autonomous and teleoperated operations.

Java · Computer Vision · PID Control · AprilTags

• 1 of 75 students selected for rigorous for-credit summer program centered around the integration of technological concepts and management principles.
• Developed EcoSentry, a machine learning-powered wildlife detection system that uses a CNN to identify animals in real-time and send alerts for safety.
• Introduced to technology entrepreneurship principles and No-Limit Texas Hold'em Poker -- thanks Lucas, W TA.

Python · CNN · Raspberry Pi · React Native · Firebase · Twilio

• Cleaned and analyzed Netflix dataset using Pandas and NumPy to identify trends across genres, release years, and ratings.
• Built data visualizations with Matplotlib to highlight patterns in content distribution and viewer metrics.
• Applied data preprocessing and exploratory analysis techniques to extract insights from large datasets.

Python · NumPy · Pandas · Matplotlib