PORTFOLIO / 2025

Calvin
Chang

Data and AI Engineer looking to explore ways to transform information, data and analytics, through machine learning, and data analyst.

Exploring Opportunities
New York, NY
CURRENTLY
Masters Student
@ Columbia University
2025 — Present
SKILLSTACK
PythonMachine LearningData AnalyticsPyTorchSQLFull-Stack Development

Experiences

Aug 2025 – Present
Kearney PERLabs, Columbia University

Part-Time Consultant

Kearney PERLabs, Columbia University

Worked with Kearney during Columbia University Operations Consulting course. Built AI simulation models and a Generative AI platform integrating RAG and behavioral clustering to enhance product-launch decision-making.

PythonRAGCausal Inference
July 2024 – Aug 2024
Tencent

AI Software Engineering Intern

Tencent

Developed and optimized generative voice and dialogue models for Honor of Kings using GPT-4 pipelines, model compression, and distributed PyTorch.

PythonPyTorchModel Compression
Dec 2024 – July 2025
Tsinghua University AI Laboratories

Undergraduate Researcher

Tsinghua University AI Laboratories

Started as a student researcher contributing to projects related to NLP. Worked on Legal related Large Language Models (LLMs), focusing on instruction generation, model fine-tuning, and evaluation frameworks to enhance legal reasoning capabilities.

PythonPyTorchTransformersLegal LLMsData VisualizationLLM Fine-tuning

Education

2025 — Present
Columbia University

Columbia University

Master of Management Science and Engineering

Worked on Projects within consulting class, learning optimization, simulation, probabilistic models, and machine learning techniques applied to real-world business problems.

OptimizationSimulationProbabilistic ModelsMachine Learning
2021 — 2025
Tsinghua University

Tsinghua University

Bachelor of Engineering in Computer Science

Part of Soccer Team, Tennis Team, Part of Students Coding Association, worked on projects to help build websites for school use. Got scholarship for 2 years for academic performance.

Data StructuresAlgorithmsArtificial Neural NetworksHuman–Computer InteractionSoftware Engineering

Projects

HackathonNov 2025

MIRRA - Bedrock-powered RAG system

Built a Bedrock-powered RAG system that simulates real consumer behavior for AWS Bedrock x Columbia Engineering Hackathon.

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ResearchDec 2024 – July 2025

Enhancing Legal Reasoning in Large Language Models

Bachelor thesis developing scalable instruction-generation and fine-tuning frameworks to improve legal reasoning capabilities of LLMs.

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ResearchSept 2023 – Jan 2025

RAG-Enhanced Decision Modeling for Patent Office Actions

AI system helping improve patent office action submission and prior-art matching using domain-specific retrieval models.

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Data ScienceApr 2024 – June 2024

Automated Root Cause Analysis System for Marketing Metrics

End-to-end analytics pipeline identifying performance drivers in large-scale marketing campaigns.

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Contact me

Always interested in new opportunities, collaborations, and conversations about the latest technologies

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Built by Calvin Chang