Hi, I'm Rena!
I'm a Junior studying Data Science & Economics at UC Berkeley
I'm passionate about leveraging data science to tell compelling stories, address real-world challenges, and influence meaningful strategies. I'm especially interested in exploring the intersection of data and economics!
Resume
Projects
Things I've built across ML, analytics, and AI
Featured
Creator Analytics Copilot
Built for IBM's AI Builders Challenge. A Streamlit app helping YouTube creators understand what drives video performance — featuring Trend Detection (z-score normalization), Posting Time Recommendations (statistical best days/hours), and plain-language success explanations powered by IBM watsonx.
AI Feature Impact Analyzer
Production-style experimentation platform answering: did this AI feature actually improve the product long-term, or just spike engagement? Simulated A/B tests on 900K rows of Google Analytics data from BigQuery, measuring engagement lift, cohort retention, statistical significance, and novelty effect detection. Auto-generates plain-English verdicts with shipping recommendations.
Machine Learning & Data Science
Sentiment Analysis of Online Reviews
Analyzed 388 customer reviews to identify sentiment trends tied to product perception and churn risk. Built an end-to-end NLP pipeline achieving 82% accuracy.
Customer Segmentation Engine
Clustered user data using unsupervised learning to support personalized product recommendations. Built during internship at Lextrack AI.
Analytics & Dashboards
CourseWise Education Meta-Analytics II
Transformed time-series usage logs into metric-ready tables and built an internal analytics dashboard for executive and analyst decision-making.
User KPI Dashboard
Designed and deployed a dashboard to track engagement, retention, and performance metrics for Athena Notes, enabling data-driven product roadmap decisions.
AI Tools
LLM App Performance Analyzer
Built an internal tool to track model response quality and inference latency across LLM applications at Lextrack AI.
AI Resume Analyzer
Extracted key resume insights and matched candidate skills to job roles using LLM-powered parsing at Lextrack AI.
Tutor Chatbot
Delivered personalized learning support for students using GPT-4 and RAG for Athena Notes to reduce hallucinations and improve outcomes.
Evaluator Performance Chatbot
Assessed chatbot responses against quality rubrics to identify improvement areas and enhance AI-assisted tutoring outcomes at Athena Notes.
Experience
Internships, research, and leadership
Internships
Data & Machine Learning Intern
May 2025 – Aug 2025Lextrack AI · Remote
- Maintained and enhanced metrics dashboard for internal AI performance monitoring, ensuring accurate and timely reporting for the engineering team.
- Updated a CLI tool to parse logs for error categorization and prompt inference latency, improving debugging efficiency and monitoring accuracy.
- Benchmarked prompt evaluation frameworks (OpenAI, Lovable AI), documenting methodologies and trade-offs to guide internal adoption decisions.
- Built multiple AI tools including LLM App Performance Analyzer, AI Resume Analyzer, and Customer Segmentation Engine.
Data Analytics Intern
May 2025 – Aug 2025Athena Notes · Remote
- Designed and deployed a User KPI Dashboard (SQL, JavaScript, Python) to track engagement, retention, and performance metrics.
- Researched AI chatbot implementations in EdTech leaders (Khan Academy, Duolingo) to identify best practices in tutoring and GPT-4-powered interaction.
- Evaluated tools including OpenAI API, LangChain, Moderation API, and RAG to improve chatbot accuracy and reduce hallucinations.
- Built Tutor Chatbot and Evaluator Performance Chatbot for personalized student learning support.
Research
Sentiment Analysis of Online Reviews
2025Independent Research · Machine Learning, NLP
- Analyzed 388 customer reviews to identify sentiment trends tied to product perception and churn risk.
- Built an end-to-end NLP classification pipeline achieving 82% accuracy.
CourseWise Education Meta-Analytics II
2025Internal Metrics & Impact Dashboard · SQL, Python
- Transformed time-series usage logs into metric-ready tables enabling tracking of engagement trends across institutional segments.
- Defined and implemented core product metrics and visualizations for an internal analytics dashboard for executive decision-making.
Clubs & Leadership
Senior Data Science Mentor & Student Support
Sep 2025 – PresentUC Berkeley Computer Science Mentors (CSM) · On-site
- Lead Content Mentor meetings and shape curriculum strategy for Data C88C (Computational Structures in Data Science).
- Develop worksheets, solutions, and original problem sets for 80+ students weekly.
- Conduct weekly discussion sections and provide student support through office hours and community events.
Director of Industry
Dec 2024 – PresentUC Berkeley CS Kickstart · On-site
- Lead industry outreach to connect 80+ women-identifying first-year CS students with companies through professional development and networking events.
- Work closely with corporate partners to bring career-focused resources, workshops, and industry insights to members.
- Previously served on External & Internal Committee, coordinating event logistics, panels, socials, and speaker engagements.
Skills
Languages, tools, and concepts I work with
Languages
Libraries & Frameworks
AI & ML Tools
Tools & Platforms
Concepts
Awards
National CyberStart America Top 7%
Scholar & Finalist — National cybersecurity competition recognizing top student performers across the US.
Certifications
Skydeck ACE Certificate
Skydeck's Accelerating Careers in Entrepreneurship Program — UC Berkeley's startup accelerator.
Events
Conferences, panels, and industry events I've attended
DS Discovery Symposium
The Data Discovery Symposium features poster presentations from student researchers. I presented my CourseWise Education Meta-Analytics II project, showcasing an internal metrics dashboard built to track platform engagement and institutional adoption.
Amazon x CS Kickstart — Emotional Intelligence Can Supercharge Your Career
From navigating rejections and interviews to building emotional competence at work, we explored how EQ is the often-overlooked skill that carries us through some of the most defining career moments.
Events I Created & Organized
💼 CSK Faculty Research Panel Organized
An engaging panel featuring six UC Berkeley faculty members who shared their research journeys, current projects, and insights into CS research. Students learned how to get involved as undergraduates and the diverse opportunities available beyond the classroom. Following the panel, students joined faculty for lunch conversations to ask deeper questions about research and career paths.
💼 CS @ Berkeley: What Actually Matters Organized
A presentation from CSK alumni about navigating Berkeley's CS community and making the most of the college experience. Panelists shared honest advice on classes, internships, clubs, networking, and the lessons they wish they knew when they first started at Berkeley.
💼 Paths in CS/DS You Didn't Know Existed Organized
A career exploration panel showcasing the many paths available within CS and data science beyond traditional roles. Industry professionals and alumni shared their unique career journeys across tech, research, product, analytics, and more.