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Hi there! I'm Ethan, a passionate mathematician and data analyst with a decade of experience in the field. I love tackling complex problems and turning raw data into insightful narratives. When I'm not crunching numbers, I enjoy exploring new trends in technology and their applications in finance and beyond. Let's connect and see how we can collaborate!…

Ethan Carter

AI Engineer, Data Annotator, Data Scientist

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Hi there! I'm Ethan, a passionate mathematician and data analyst with a decade of experience in the field. I love tackling complex problems and turning raw data into insightful narratives. When I'm not crunching numbers, I enjoy exploring new trends in technology and their applications in finance and beyond. Let's connect and see how we can collaborate!…

Available to hire

Hi there! I’m Ethan, a passionate mathematician and data analyst with a decade of experience in the field. I love tackling complex problems and turning raw data into insightful narratives. When I’m not crunching numbers, I enjoy exploring new trends in technology and their applications in finance and beyond. Let’s connect and see how we can collaborate!

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

English

Fluent

Spanish; Castilian

Advanced

French

Advanced

Work Experience

Machine Learning Engineer III at Spotify AI

January 1, 2023 - Present

Developed and optimized speech-to-text annotation pipelines for audio content analysis. Improved transcription quality using active learning, reducing annotation errors by 25%. Designed tools to measure and mitigate bias in language model training datasets. Collaborated with research teams to enhance NLP models for automatic audio tagging and sentiment analysis.

Lead Machine Learning Scientist at Nuance Communications

January 1, 2023 - September 5, 2025

Built end-to-end data annotation pipelines for training speech recognition models. Implemented semi-supervised learning techniques to reduce human labeling costs by 30%. Developed annotation quality assessment tools to ensure dataset integrity and model performance. Collaborated with linguists to improve language models for multilingual speech processing.

Research Scientist (NLP) at Stanford AI Lab

January 1, 2021 - September 5, 2025

Led research on multilingual speech data annotation strategies for NLP models. Developed tools for analyzing and visualizing dataset quality in large-scale speech recognition systems. Published papers on improving annotation efficiency for low-resource languages. Co-authored a toolkit automating manual transcription workflows.

Data Annotation Engineer (Intern) at Amazon Alexa AI

January 1, 2018 - September 5, 2025

Assisted in building speech data annotation tools for Alexa’s voice recognition system. Improved labeling accuracy and efficiency through custom annotation guidelines. Developed scripts for data validation and quality control to ensure robustness of training datasets.

Senior Quantitative Analyst at Vertex Capital Management

January 1, 2020 - Present

Developed advanced mathematical and statistical models for financial markets, optimized investment strategies, and presented technical reports to stakeholders. Utilized programming tools to automate financial analysis.

Machine Learning Scientist at NovaMind AI Technologies

January 1, 2016 - January 1, 2019

Designed and implemented machine learning models, analyzing large datasets to support intelligent decision-making systems. Focused on improving predictive algorithms for classification and clustering tasks.