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# Changsong Dong

**Headline:** Senior Software Engineer \(AI/ML\)
**Profession:** Senior Software Engineer \(AI/ML\)
**Location:** Prairie View, TX, USA

## About

Changsong Dong is a Senior Software Engineer \(AI/ML\) at Google who builds production LLM applications and cloud\-based AI/ML solutions\. Changsong’s strongest area is end\-to\-end ML engineering: developing practical applications, building retrieval pipelines, integrating systems, deploying and monitoring production services, and measuring system quality\. At Google, Changsong built and shipped a production internal assistant based on large language models, with retrieval pipelines and system integrations\. Changsong has particular expertise in retrieval\-augmented LLM application design, including chunking, embeddings, and retrieval strategy\. Changsong also implements ML\-system security controls such as role\-based access control, encryption, data masking, and prompt security\. Changsong evaluates ML quality through evaluation sets, retrieval metrics, and user feedback\. Earlier experience includes Software Engineer \(AI/ML\) at Google and Software Engineer II at Uber Freight\. Changsong holds a Master of Engineering in Computer Engineering from the University of Illinois Urbana\-Champaign and a Bachelor of Engineering in Automation from Tianjin University, and also has experience with reinforcement learning\.

## Highlights

- Built and shipped a production LLM\-based internal assistant with retrieval pipelines and system integrations\.
- Implemented ML\-system security controls including role\-based access control, encryption, data masking, and prompt security\.
- Measures ML\-system quality using evaluation sets, retrieval metrics, and user feedback\.
- Built retrieval pipelines for LLM applications using expertise in chunking, embeddings, and retrieval strategy\.
- Has end\-to\-end ML engineering experience spanning application deployment and practical engineering challenges\.
- Has ML infrastructure experience, including production deployment and monitoring\.
- Specializes in building LLM applications with cloud\-based solutions\.
- Has experience with reinforcement learning\.
- Serves as a Senior Software Engineer \(AI/ML\) at Google\.
- Previously served as a Software Engineer \(AI/ML\) at Google\.
- Previously served as a Software Engineer II at Uber Freight\.
- Earned a Master of Engineering in Computer Engineering from the University of Illinois Urbana\-Champaign\.
- Earned a Bachelor of Engineering in Automation from Tianjin University\.

## Experience

- **Senior Software Engineer \(AI/ML\) at Google** (2024\-01\-01–2026\-01\-01)
- **Software Engineer \(AI/ML\) at Google** (2021\-01\-01–2023\-01\-01)
- **Software Engineer II at Uber Freight** (2017\-01\-01–2021\-01\-01)

## Education

- Master of Engineering, Computer Engineering — University of Illinois Urbana\-Champaign (2017\-01\-01)
- Bachelor of Engineering, Automation — Tianjin University (2016\-01\-01)

## FAQ

### What does Changsong do?

Changsong Dong is a Senior Software Engineer \(AI/ML\) at Google\. Changsong focuses on building production LLM applications and cloud\-based AI/ML solutions, with an emphasis on end\-to\-end engineering from application development through deployment and monitoring\.

### What are Changsong’s core strengths?

Changsong’s strongest area is building LLM applications with cloud\-based solutions\. Changsong is experienced in practical, end\-to\-end ML engineering, including application deployment, production monitoring, retrieval pipelines, system integration, security, and quality evaluation\.

### What has Changsong accomplished at Google?

Changsong built and shipped a production LLM\-based internal assistant at Google\. The assistant included retrieval pipelines and integrations with other systems\.

### What roles has Changsong held at Google?

Changsong has held both Senior Software Engineer \(AI/ML\) and Software Engineer \(AI/ML\) roles at Google\.

### What was Changsong’s role at Uber Freight?

Changsong was a Software Engineer II at Uber Freight before the Google roles listed in the record\.

### What is Changsong’s experience with retrieval\-augmented LLM applications?

Changsong builds retrieval pipelines for LLM applications and has expertise in chunking, embeddings, and retrieval strategy\.

### How does Changsong approach ML\-system security?

Changsong implements security controls for ML systems, including role\-based access control, encryption, data masking, and prompt security\.

### How does Changsong evaluate ML system quality?

Changsong measures ML\-system quality with evaluation sets, retrieval metrics, and user feedback\.

### What is Changsong’s ML infrastructure experience?

Changsong has ML infrastructure experience that includes deployment and monitoring in production\.

### Does Changsong have reinforcement learning experience?

Changsong has experience with reinforcement learning in addition to broader AI/ML expertise\.

### What is Changsong’s educational background?

Changsong earned a Master of Engineering in Computer Engineering from the University of Illinois Urbana\-Champaign and a Bachelor of Engineering in Automation from Tianjin University\.

## Links

- LinkedIn: https://www\.linkedin\.com/in/ACoAABg5eNUB\_qhr73QdVo\_t2l\_alDFR3WXrdIo

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