cv
Basics
| Name | Alexander Chien |
| Label | B.S. Computer Science Candidate | Undergraduate Researcher |
| alexchien22@ucla.edu | |
| Phone | (951) 892-9896 |
| Summary | Undergraduate researcher focused on multimodal/embodied AI, agentic systems, and safety & reliability. Experience spans vision-language model safety evaluation, synthetic data generation for embodied agents, and structured/constraint-based methods for reliable generation. |
Education
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2022.09 - 2026.06 Los Angeles, CA, USA
B.S.
University of California, Los Angeles (UCLA)
Computer Science
- Data Structures & Algorithms
- Neural Networks and Deep Learning
- Deep Learning for Computer Vision
- Foundations of Computer Vision
- Probabilistic Models in Genomics
- Signal Processing
- Introduction to Robotics
- Advanced Neural Networks and Deep Learning (Graduate)
- Computational Imaging (Graduate)
- Human Factors in AI (Graduate)
Publications
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2025.09.18 Embodied Web Agents: Bridging Physical-Digital Realms for Integrated Agent Intelligence
NeurIPS 2025 Datasets and Benchmarks Track (Spotlight)
Co-authored a benchmark and dataset for evaluating agents that integrate web interaction with embodied/physical context, supporting research on grounded, multimodal, and agentic intelligence.
Work
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2025.06 - 2025.12 San Jose, CA
Multimodal Safety Research Intern
A10 Networks
Conducted research on multimodal safety alignment for vision–language systems, focusing on failure cases in visual grounding, efficiency constraints, and adversarial robustness. Designed and evaluated a vision–language guardrail model and initiated a scalable multimodal safety dataset derived from large pretraining corpora.
- Characterized failure patterns across grounding, latency, and coverage dimensions.
- Implemented evaluation harness for robustness under visually distracting inputs.
- Established end-to-end data pipeline toward public multimodal safety release.
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2024.06 - Present Los Angeles, CA
Undergraduate Researcher
Chang's Group at UCLA NLP
Studied long-context memory in embodied multi-agent systems, developing Temporary-LoRA–based mechanisms to improve knowledge persistence in VirtualHome simulations. Led large-scale synthetic dataset generation for multimodal agent training and co-authored a benchmark on embodied web agents.
- Temporary-LoRA adaptation for context retention in multi-agent settings.
- Generated 10k+ first-person, multi-step embodied trajectories.
- Co-author, NeurIPS 2025 Datasets & Benchmarks Spotlight.
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2023.09 - Present Los Angeles, CA
Undergraduate Researcher
UCLA StarAI Lab
Worked on structured reasoning for generative models, including constraint-guided decoding and discrete optimization. Reproduced structured diffusion results, built SDD-based decoding constraints for language models, and analyzed unbiased gradient estimators for Mixture-of-Experts routing.
- Reduced decoding-time constraint complexity via SDD compilation.
- Empirical comparison of implicit vs explicit structure in generation.
- Variance analysis of multi-sample estimators for discrete expert selection.
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2023.06 - 2023.08 Los Angeles, CA
Software Engineer Intern
CreatorHub
Developed full-stack MVP features for a creator–brand platform, spanning backend APIs, database design, and authentication workflows. Emphasized schema correctness, security, and production-ready deployment.
- Delivered user-facing product features under startup timelines.
- Defined MongoDB schemas with validation for consistency guarantees.
- Implemented secure credential handling and recovery flows.
Projects
- 2025.05 - 2025.06
Robotic Manipulation with Robosuite
Trained and evaluated reinforcement-learning agents for simulated robotic manipulation using Robosuite, comparing PPO and SAC under sparse and dense reward regimes and diagnosing instability sources in exploration.
- PPO: ~90% task success after 10M environment steps.
- SAC: full task success in <1M steps.
- Identified reward-sparsity–induced mode collapse failure mode.
- 2025.03 - 2025.06
Hallucination Detection
Proposed a hallucination-detection framework for medical question answering with retrieval-augmented LLMs, integrating model uncertainty and retrieval agreement to support safer EHR-based reasoning.
- Designed confidence score combining entropy, factuality, and retrieval similarity.
- Formalized hallucination categories for clinical QA evaluation.
- Benchmarking protocol for trust calibration in medical RAG systems.
- 2024.02 - 2024.03
Novel View Synthesis
Analyzed classical and neural view-synthesis methods, comparing light-field rendering, NeRF variants, and 3D Gaussian Splatting with respect to efficiency, memory footprint, and visual fidelity.
- Comparative analysis across NeRF, Mip-NeRF 360, and splatting methods.
- Identified regimes where Gaussian Splatting dominates in efficiency.
Skills
| Programming | |
| Python | |
| C++ | |
| C |
| ML / DL Frameworks | |
| PyTorch | |
| Hugging Face Transformers | |
| scikit-learn | |
| DeepSpeed |
| Data & Visualization | |
| NumPy | |
| Pandas | |
| Matplotlib |
| Systems / Tooling | |
| Linux | |
| Git | |
| Docker | |
| Weights & Biases |
Volunteer
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2023.10 - 2024.09 Los Angeles, CA
Webmaster
Bruin Spacecraft Group
Led a team of 6 to redesign and maintain the club’s website, improving usability for sponsors and prospective members. Coordinated with 7 admin teams to ensure accurate project documentation and progress updates.
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2022.09 - Present Los Angeles, CA
Instructor and Mentor
exploretech.la
Designed and taught workshops on computer vision, generative AI, and NLP for 100+ students at exploretech.la’s annual outreach expo. Mentored high-school students from Title I schools in Los Angeles, introducing core ML concepts such as linear models and CNNs.
Interests
| Multimodal and Embodied AI | ||||
| Vision-language models | ||||
| Embodied agents | ||||
| Grounded reasoning | ||||
| Safety and Reliability | |||||
| Alignment | |||||
| Guardrails | |||||
| Hallucination detection | |||||
| Trust calibration | |||||
Languages
| English | |
| Native |
| Chinese (Mandarin) | |
| Intermediate |