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9+ year motivated Data Scientist/ML Engineer with deep knowledge in machine learning, analytics, and product optimization. Proven experience building and deploying end-to-end ML solutions using Python, R, and SQL. Proficient in cloud (AWS and GCP), modern data stacks (Fivetran, dbt, Databricks, Snowflake), and BI (Looker, Tableau, Power BI). Skilled in marketing analytics, including Marketing Mix Modeling, Incrementality Testing, and GenAI-driven ad copy creation. Experienced in developing internal management tools and CRMs using low-code platforms such as Retool, Streamlit. Founder of a data-driven consulting firm, leading technical deliveries and mentoring a team of three to execute high-impact projects for clients across industries.…9+ year motivated Data Scientist/ML Engineer with deep knowledge in machine learning, analytics, and product optimization. Proven experience building and deploying end-to-end ML solutions using Python, R, and SQL. Proficient in cloud (AWS and GCP), modern data stacks (Fivetran, dbt, Databricks, Snowflake), and BI (Looker, Tableau, Power BI). Skilled in marketing analytics, including Marketing Mix Modeling, Incrementality Testing, and GenAI-driven ad copy creation. Experienced in developing internal management tools and CRMs using low-code platforms such as Retool, Streamlit. Founder of a data-driven consulting firm, leading technical deliveries and mentoring a team of three to execute high-impact projects for clients across industries.

RUOCHEN (SAM) CHEN

Data Scientist, AI Engineer, AI Developer, +2

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9+ year motivated Data Scientist/ML Engineer with deep knowledge in machine learning, analytics, and product optimization. Proven experience building and deploying end-to-end ML solutions using Python, R, and SQL. Proficient in cloud (AWS and GCP), modern data stacks (Fivetran, dbt, Databricks, Snowflake), and BI (Looker, Tableau, Power BI). Skilled in marketing analytics, including Marketing Mix Modeling, Incrementality Testing, and GenAI-driven ad copy creation. Experienced in developing internal management tools and CRMs using low-code platforms such as Retool, Streamlit. Founder of a data-driven consulting firm, leading technical deliveries and mentoring a team of three to execute high-impact projects for clients across industries.…9+ year motivated Data Scientist/ML Engineer with deep knowledge in machine learning, analytics, and product optimization. Proven experience building and deploying end-to-end ML solutions using Python, R, and SQL. Proficient in cloud (AWS and GCP), modern data stacks (Fivetran, dbt, Databricks, Snowflake), and BI (Looker, Tableau, Power BI). Skilled in marketing analytics, including Marketing Mix Modeling, Incrementality Testing, and GenAI-driven ad copy creation. Experienced in developing internal management tools and CRMs using low-code platforms such as Retool, Streamlit. Founder of a data-driven consulting firm, leading technical deliveries and mentoring a team of three to execute high-impact projects for clients across industries.

Available to hire

9+ year motivated Data Scientist/ML Engineer with deep knowledge in machine learning, analytics, and product optimization.
Proven experience building and deploying end-to-end ML solutions using Python, R, and SQL.
Proficient in cloud (AWS and GCP), modern data stacks (Fivetran, dbt, Databricks, Snowflake), and BI (Looker, Tableau, Power BI).
Skilled in marketing analytics, including Marketing Mix Modeling, Incrementality Testing, and GenAI-driven ad copy creation.
Experienced in developing internal management tools and CRMs using low-code platforms such as Retool, Streamlit.
Founder of a data-driven consulting firm, leading technical deliveries and mentoring a team of three to execute high-impact projects for clients across industries.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

English

Fluent

Chinese

Fluent

Work Experience

Senior Data Scientist at HelloFresh

August 1, 2025 - Present

Improved the PyMC Marketing Mix model by expanding applications to all 34 brands using AWS, Airflow, and Databricks. Used SARIMAX to forecast conversions over the next 65 weeks given spend data to inform strategy operations.

Senior Data Scientist / Machine Learning Engineer at Zenni Optical

November 1, 2023 - August 1, 2025

Built and deployed Marketing Mix Models using LMMM (Python) and Robyn (R) to optimize marketing spend in GCP and Databricks; presented results in Looker for stakeholders. Designed incrementality testing with Geolift (R), developed ML features for ad creatives, and tuned GenAI to generate new ad copies. Maintained ETL pipelines with Fivetran and dbt.

Founder at MountE Consulting - A Data-Driven Consulting Firm

May 1, 2022 - November 1, 2023

Led a team of three delivering tailored data-driven solutions across e-commerce, media, and logistics. Responsibilities spanned project scoping, technical execution, and mentoring. Contributions included computer vision models (TensorFlow/Keras, PyTorch), recommendation systems in Snowflake and Databricks, and scalable ML pipelines in GCP and AWS; built internal tools and CRMs with Retool and JavaScript; developed Marketing Mix Model prototypes for clients to inform budget strategies.

Data Scientist at Rocket Innovation Studio, owned by Rocket Companies

June 1, 2021 - May 1, 2022

Created a data pipeline for lead delivery to 3rd-party mortgage agents using PySpark and AWS Glue/CloudWatch; tested API calls with Postman; conducted A/B testing and visualized conversion performance in Power BI. Generated $55 million in extra closing volume within the first 4 months of implementation.

Senior Data Scientist / Data Scientist at Propel Holdings

December 1, 2017 - June 1, 2021

Improved underwriting efficiency by initiating and delivering 3 end-to-end ML products for customer engagement and credibility. Worked with data from 10+ sources, built data prep and model pipelines in Python and R; monitored performance with Tableau & DOMO; set up data/ML pipelines with Jenkins; saved $20k/month and significantly improved KPIs (conversion, default) through optimized customer selection strategies.

Data Scientist at Rocket Innovation Studio

June 1, 2021 - May 1, 2022

Created a data pipeline for lead delivery to 3rd-party mortgage agents using PySpark and AWS Glue/CloudWatch; performed API testing with Postman; conducted A/B tests and visualized conversion performance in Power BI; contributed to $55M in incremental closing volume in first 4 months.

Data Analyst at SPRQL Lab

January 1, 2016 - January 1, 2019

Generated data-driven insights for social psychophysiology research; built data pipelines and analysis workflows; collaborated with Dr. Elizabeth Page-Gould (Canada Research Chair).

VP of Data Analytics at Alpha Solution

January 1, 2015 - January 1, 2018

Led analytics initiatives for an academic consulting firm; oversaw data-driven projects and client deliverables; mentored junior analysts and aligned analytics capabilities with business objectives.