Open to opportunities

Sean Chang

@seanchang

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AI Trainer and data annotation specialist improving LLM reasoning, translation, and cross-lingual performance.

United States

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What I'm looking for

I’m looking to apply my AI training and data-annotation experience to improve LLM reasoning and translation quality, partnering with teams that value careful evaluation, cross-cultural nuance, and clear communication.

I’m currently working as a Freelance AI Trainer – Data Annotation, where I engineer culturally nuanced prompts in both English and Chinese to stress-test Large Language Model (LLM) reasoning, translation accuracy, and cross-lingual performance.

I evaluate model outputs using objective metrics (factual accuracy, formatting constraints, logic) alongside subjective rubrics like tone consistency, brand alignment, and helpfulness.

Before this, I built a strong foundation through a Landscape Architect Intern role and multiple landscape studio projects, applying tools like SketchUp, Rhino 7, and AutoCAD while focusing on problem solving, space design, and clear communication with clients and teams.

Experience

Work history, roles, and key accomplishments

Current

Freelance AI Trainer

Current

Data Annotation

Jul 2026 - Present (0 months)

Engineered culturally nuanced bilingual prompts (English and Chinese) to stress-test LLM reasoning and translation/cross-lingual performance. Evaluated outputs using objective metrics (e.g., factual accuracy, formatting constraints, logic) and subjective rubrics (tone, brand alignment, helpfulness).

Prompt Engineering LLM Model Evaluation Cross Lingual Performance Translation Accuracy Evaluating Factual Accuracy Reasoning

Landscape Architect Intern

Anyi’s Landscape Firm

Jul 2025 - Aug 2025 (1 month)

Assisted senior landscape architects with project planning and execution. Learned and applied residential and commercial planting rules and created 3D models in SketchUp to visualize designs for clients.

Project Planning Landscape Design Planting Rules 3D Modeling SketchUp Client Visualization

Waiter

Ten Second Yunnan Rice Noodle

Aug 2024 - Oct 2024 (2 months)

Took orders and served meals promptly while maintaining a clean dining environment. Provided clear cooking instructions and explained allergen sources with alternative options.

Food Service Customer Service Allergen Communication

Crew Member

McDonald's

Apr 2023 - Jul 2024 (1 year 3 months)

Took orders and served food quickly in a fast-paced environment. Ensured sufficient inventory to support ongoing service.

Order Taking Fast Paced

Landscape Studio Project

Landscape Installations

Jan 2023 - Mar 2023 (2 months)

Developed and installed site-specific landscape solutions to address identified issues and deliver key messages. Applied Rhino 7 to create 3D models and analyzed project outcomes.

Site Solutions Rhino 3D Modeling Problem Solving

Landscape Studio Project

Campus Redevelopment

Sep 2022 - Dec 2022 (3 months)

Redesigned a campus courtyard by analyzing space usage to improve accessibility and social interaction. Used AutoCAD to draft professional floor plans and create detailed spatial designs.

Accessibility Focused Design Social Design Autocad Floor Plan Design Spatial Design

Japanese Club Leadership

Japanese Club

Sep 2020 - Nov 2020 (2 months)

Led a team to explore and share engaging aspects of Japanese culture with club members. Organized and facilitated interactive cultural events and discussions.

Leadership Team Coordination Cultural Event Facilitation Cross Cultural Communication

Education

Degrees, certifications, and relevant coursework

University of Oregon

Bachelor of Science in Environmental Design, Environmental Design

Activities and societies: Minor: Public Planning Policy Management.

Pursuing a Bachelor of Science in Environmental Design with a minor in Public Planning Policy Management at the University of Oregon, expected to graduate in 2026.