Richardson, TX
Email: liut19707@gmail.com
GitHub: Yongyanliu65

📄 View Resume (PDF)

B.S. in Computer Science — Expected May 2030

• Academic Excellence Scholarship (AES)

Languages: Python, C/C++, Java, JavaScript, HTML, CSS

Tools & Technologies: Git, GitHub, Linux, ROOT, TMVA/SOFIE

2026

Contributed C++ correctness and robustness improvements to ROOT TMVA/SOFIE, including work addressing undefined behavior, exception-handling edge cases, and const correctness.

Selected Pull Requests:

• #23158 — Avoid undefined behavior in Clean_name
  Casts characters passed to std::isalnum to unsigned char to avoid undefined behavior for negative char values.

• #23162 — Handle out-of-range dynamic shape values
  Handles std::out_of_range when converting dynamic shape parameters with std::stoi, keeping conversion-failure behavior consistent.

• #23173 — Improve const correctness in shape iteration
  Uses a const reference when iterating over read-only shape dimensions, making the intended const behavior explicit.

Oct. 2024 – Present

• Designed, developed, and deployed APStudy.net, an online AP practice and error-tracking platform serving 41,000+ registered users and generating 94,000+ views.
• Built features for recording, categorizing, and analyzing student mistakes; iterated on product functionality based on real user feedback.
• Maintained the deployed platform, including performance, security, troubleshooting, and ongoing feature updates.

2026

• Created a structured C++ learning project to practice applying programming concepts to unfamiliar code rather than relying on memorized solutions.
• Built exercises covering error analysis, targeted correction, scaffolded practice, and independent transfer.
• Published the materials on GitHub with scoring rubrics and an instructor guide.

2022 – 2023

• Developed a responsive JavaScript interface to control hardware components including fans, LEDs, environmental sensors, and buzzers.
• Integrated real-time sensor data with backend server responses and collaborated across hardware, backend, and frontend teams.

Jul. – Aug. 2025

• Led frontend development for a warehouse-automation project, collaborating with data science and backend teams on system integration and user-facing functionality.

Oct. – Dec. 2023

• Supported software development and technical troubleshooting for educational technology activities.

Software Group Leader & Virginia Champion (2024)

• Led software work within a competitive robotics team and contributed to team coordination and technical problem solving.

2023 – 2025

• Led 50+ sessions totaling 74+ hours and received top-5% positive student feedback.

• Resume — PDF
• Resume — Source DOCX