Rubenย Stefanus
Senior Data Scientist
Special capital Region of Jakarta, Indonesia
Summary
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Top SchoolRuben Stefanus is a Senior Data Scientist based in Jakarta with 7 years of hands-on experience building production ML systems across healthcare, finance, retail, and consulting. At Halodoc he designed and scaled LLM-powered adjudication and auto-adjudication systems that automated thousands of claims daily, cut processing time by up to 70%, and improved unattended claim rates dramatically. He has strong applied ML pedigree from fintech at Finantier (credit scoring and transaction modeling) to retail demand forecasting and OCR solutions at Warung Pintar, consistently translating research into measurable business impact. Ruben also co-founded and researches with local AI communities, mentors data scientists, and builds evaluation and observability pipelines to make LLM deployments safer and more reliable. Known for combining analytical rigor with pragmatic engineering, he pairs deep technical skills (XGBoost, LSTMs, transformer/LLM tooling, MLOps) with a collaborative, impact-first mindset. Outside work heโs active in mentoring and community building, bringing academic curiosity into real-world products.
7 years of coding experience
5 years of employment as a software developer
Bachelor's degree, Electrical and Electronics Engineering, 3.73, Bachelor's degree, Electrical and Electronics Engineering, 3.73 at Universitas Kristen Maranatha Bandung
English, Indonesian
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (14)
earth9
java8
computer-vision7
ocr6
nlp6
deep-learning6
quora6
preprocessing6
natural-language-processing6
machine-learning5
sentiment-analysis4
python3
data-science2
pytorch1
Programming languages (3)
Github contributions (5)
jakartaresearch/maleo
Sep 2020 - Apr 2021
Wrapper library for text cleansing, preprocessing in NLP
Contributions:13 releases, 32 commits, 8 PRs in 7 months
natural-language-processingpreprocessingmachine-learningnlp-librarynlp
jakartaresearch/receipt-ocr
Jul 2021 - Oct 2021
Receipt OCR
Contributions:1 release, 30 commits, 4 PRs in 3 months
ocrcomputer-visiondeep-learning
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