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Hi there! I’m Elroy, a Columbia University CS student aiming to graduate in December 2025 and pursuing an accelerated master's starting in 2026. I’ve built a full-stack Shopify app as a founding engineer, led backend refactors, and contributed to fintech and startup projects through internships and personal ventures. I thrive in fast-paced environments where I can translate ambitious ideas into reliable software and measurable impact. Outside coding, I’m deeply involved in campus sports and service work—Columbia Intramurals, rugby leadership, and community education initiatives have shaped my teamwork, leadership, and communication skills. I’m always curious about turning AI research into practical pipelines and helping teams ship products that users actually love.…Hi there! I’m Elroy, a Columbia University CS student aiming to graduate in December 2025 and pursuing an accelerated master's starting in 2026. I’ve built a full-stack Shopify app as a founding engineer, led backend refactors, and contributed to fintech and startup projects through internships and personal ventures. I thrive in fast-paced environments where I can translate ambitious ideas into reliable software and measurable impact. Outside coding, I’m deeply involved in campus sports and service work—Columbia Intramurals, rugby leadership, and community education initiatives have shaped my teamwork, leadership, and communication skills. I’m always curious about turning AI research into practical pipelines and helping teams ship products that users actually love.

Elroy Irwan Jahja Loo

Full Stack Developer, Web Developer, Back-End Developer, +3

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Hi there! I’m Elroy, a Columbia University CS student aiming to graduate in December 2025 and pursuing an accelerated master's starting in 2026. I’ve built a full-stack Shopify app as a founding engineer, led backend refactors, and contributed to fintech and startup projects through internships and personal ventures. I thrive in fast-paced environments where I can translate ambitious ideas into reliable software and measurable impact. Outside coding, I’m deeply involved in campus sports and service work—Columbia Intramurals, rugby leadership, and community education initiatives have shaped my teamwork, leadership, and communication skills. I’m always curious about turning AI research into practical pipelines and helping teams ship products that users actually love.…Hi there! I’m Elroy, a Columbia University CS student aiming to graduate in December 2025 and pursuing an accelerated master's starting in 2026. I’ve built a full-stack Shopify app as a founding engineer, led backend refactors, and contributed to fintech and startup projects through internships and personal ventures. I thrive in fast-paced environments where I can translate ambitious ideas into reliable software and measurable impact. Outside coding, I’m deeply involved in campus sports and service work—Columbia Intramurals, rugby leadership, and community education initiatives have shaped my teamwork, leadership, and communication skills. I’m always curious about turning AI research into practical pipelines and helping teams ship products that users actually love.

Available to hire

Hi there! I’m Elroy, a Columbia University CS student aiming to graduate in December 2025 and pursuing an accelerated master’s starting in 2026. I’ve built a full-stack Shopify app as a founding engineer, led backend refactors, and contributed to fintech and startup projects through internships and personal ventures. I thrive in fast-paced environments where I can translate ambitious ideas into reliable software and measurable impact.

Outside coding, I’m deeply involved in campus sports and service work—Columbia Intramurals, rugby leadership, and community education initiatives have shaped my teamwork, leadership, and communication skills. I’m always curious about turning AI research into practical pipelines and helping teams ship products that users actually love.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Language

English

Fluent

Chinese

Intermediate

Indonesian

Intermediate

Work Experience

Founding Engineer at Hangr

June 1, 2025 - September 23, 2025

Developed and pushed full-stack Shopify App; Trained and improved 2D-to-3D AI model which improved accuracy by 20%; Researched latest AI tools and integrated into proprietary technology pipeline.

Backend Software Engineering Intern at Ajaib

August 1, 2024 - September 23, 2025

Reduced backend latency by 20% by refactoring transactions management tool legacy code from Python to Java Spring Boot; Migrated all mutual funds financial data from PostgreSQL to MySQL while designing database structure; Created mutual funds table and chart data APIs for Ajaib Website and App in Java; Implemented email notification system for mutual funds-related transactions; Ensured 100% test coverage for all implementations.

Part-time Software Engineering Intern at Primrose Capital

January 1, 2024 - September 23, 2025

Leveraged Financial APIs (Laevitas, Amberdata) to plot proprietary forwards curve for crypto future options; Created correlation and covariance analysis dashboard between cryptocurrencies and 10,000+ macro assets using Laevitas and Yfinance, uncovering macroeconomic trends that informed strategic live-trading decisions; Reduced 30% of noise for Crypto Future Contracts data through outlier detection and machine learning data cleaning techniques.

Product Development Intern at The Bulletin

August 1, 2023 - September 23, 2025

Obtained over 150 effective responses from Official Columbia University Organizations and clubs; Utilized Python, pandas, and including sentiment analysis to synthesize responses into actionable takeaways for tech/marketing team; Designed business portal with Figma and marketing collateral using Canva.

Founding Engineer at Hangr

June 1, 2025 - September 23, 2025

Developed and pushed full-stack Shopify App; Trained and improved 2D-to-3D AI model which improved accuracy by 20%; Researched latest AI tools and integrated into proprietary technology pipeline

Backend Software Engineering Intern at Ajaib

August 1, 2024 - September 23, 2025

Part-time Software Engineering Intern at Primrose Capital

January 1, 2024 - September 23, 2025

Product Development Intern at The Bulletin

August 1, 2023 - September 23, 2025