HUIXUAN (CRISTINA) HUANG

Backend Developer at Cuatro

Developed and maintained scalable backend infrastructure using Spring Boot and PostgreSQL for a multilingual mobile app, enabling robust user authentication, real-time data synchronization, and AWS cloud deployment. Engineered a telemetry pipeline via RESTful API to capture engagement metrics (logins, survey completions) for data tracking and admin monitoring. Planned API integration for Student Information Systems to enable seamless data exchange between school databases and the mobile app. Collaborated with frontend engineers to define API contracts, enhance data modeling, and optimize response payloads.

Java Developer at Great Wall Digital Energy

Contributed to development and maintenance of Java modules for managing airport Wi-Fi user access and session data; implemented unit tests with JUnit; documented issues and supported debugging; aligned with robust backend development and cloud computing practices.

Research Assistant at Shaanxi Normal University

Designed Graph Neural Network model to analyze spatiotemporal interconnections among ecological factors across regions. Authored articles on deep learning, graph neural networks, and GIS for the National Natural Science Fund application; wrote two chapters for an undergraduate GIS textbook: Introduction to GIS; organized weekly study sessions for a graduate student group.

Project Developer at Columbia University

Time Traveler's Museum - Multiplayer VR Experience: Built a multiplayer VR experience for Meta Quest that integrates Gaussian Splatting to enable shared exploration of high-fidelity memory-based environments. Dynamically loaded Gaussian Splatting scenes at runtime, reducing scene load times by approximately 40% and improving frame stability and user interaction responsiveness.

Project Developer at Columbia University

Mahjong Interactive Learning Platform: Built a Mahjong learning platform using Flask, JavaScript, HTML/CSS to teach winning hand logic through interactive tutorials. Implemented drag-and-drop tile reordering, server-side validation, and a real-game simulation mode to teach users Mahjong winning strategies through interactive gameplay.

Backend Developer at Cuatro

Backend Developer responsible for ETL pipelines and web crawlers aggregating financial aid data from 50+ educational sources. Designed normalized database schemas and automated data validation workflows, reducing manual data entry by 80%. Built RESTful API endpoints using Spring Boot and PostgreSQL with authentication, data persistence, and telemetry tracking across 10+ engagement metrics. Defined API contracts with frontend and AI teams, researched SIS integrations, and prototyped admin dashboards in Figma. Participated in cross-functional code reviews to ensure frontend-backend integration quality and API fidelity. AWS deployment involved.

Java Developer at Great Wall Digital Energy

Contributed to the development and maintenance of Java modules for an airport Wi-Fi management system, handling user authentication and session tracking. Applied object-oriented programming principles and design patterns. Implemented JUnit test suites achieving 85% code coverage, validating authentication logic and database transaction integrity. Debugged production issues and documented technical solutions, reducing incident resolution time by 25%.