EIT 4167, Ring Rd, Waterloo, ON N2L 3G1

Ph.D. in Electrical and Computer Engineering
University of Waterloo (2022 – ?)

B.Eng. in Engineering
Chongqing University (2017 – 2021)

• Pluggable type systems and optional type checking
• Type inference for reducing annotation burdens
• Lightweight formal methods for program correctness

Applied Scientist Intern
Amazon, Automated Reasoning Group (2024)

• Applied an immutability type checker to AWS internal codebases.
• Translating Dafny to Java with Checker Framework annotations.

Graduate Research Assistant
University of Waterloo (2023 – Present)

• Contributed to an immutability type checker and inference tools for Java.
• Worked on the Checker Framework, fixing false negatives and adding new features for Nullness and Initialization checkers.
• Developed a VSCode extension using LSP to detect potential errors and improve IDE support for pluggable type systems.

Checker Framework Contributions

• Improved nullness and initialization checkers to enhance static analysis tools for Java developers.

PICO: Practical Immutability for Classes and Objects

• Built an optional immutability type checker for Java and implemented type inference to reduce annotation overhead.

Joos Compiler

• Created a Java subset compiler, implementing lexer, parser, semantic analysis, and code generation.

Boolean Satisfiability Solver

• Developed a SAT solver using the DPLL algorithm and Tseitin transformation to handle formulae in conjunctive normal form.

• CAV VMW Scholarship, 2024
• Oregon Programming Languages Summer School Fellowship, 2024
• PLMW Scholarship (PLDI), 2023

Presentations

• Talk: Practical Class and Object Immutability, University of Toronto and University of Waterloo Programming Language Meetup (Apr. 2024).
• Poster: Pluggable Properties for Program Correctness, Cybersecurity and Privacy Institute Annual Conference (Oct. 2024).

University of Waterloo

• Testing, Quality Assurance, and Maintenance (ECE 653) – Teaching Assistant, 2024
• Methods and Tools for Software Engineering (ECE 650) – Teaching Assistant, 2024
• Software Design and Architectures (SE 464) – Teaching Assistant, 2023 Fall

• Artifact Evaluation: TACAS 2025, SPIN 2025

• Email: aosen.xiong@uwaterloo.ca
• GitHub: Ao-senXiong
• Location: EIT 4167, Ring Rd, Waterloo, ON N2L 3G1

Last updated: November 2024