Biliarto Sastro Cemerson

Data Scientist

Statistics graduate with a strong analytical foundation and hands-on experience in the end-to-end data science lifecycle.

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Work Experience

Simplifa.AI

Data Annotator & AI Reviewer

Aug 2025 — Present

Validate 1.000+ pages bank mutation data extraction from 20+ different bank formats with 99% accuracy.
Labeling 5.000+ financial data using Argila and Huggingface for AI model training optimization.

Rumah Sakit Pratama Kota Yogyakarta

Data Analyst Intern

Jul 2023 — Aug 2023

Analyzed medical records of 500+ COVID-19 patients, uncovering symptom patterns and risk factors.
Built classification models (Binary Logistic Regression) to predict COVID-19 severity, improving understanding of clinical risk (F1-Score up to 60%).

Projects

AC Stance API

Build an API from a fine-tuned BERT model to classify public opinions on the Academy Crypto (AC) case into three categories: Support, Against, and Neutral.

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Bitcoin Price Forecasting using Hybrid Deep Learning

Apply Rolling Window Cross-Validation approach in two different BTC market scenarios (Bear and Bull) with Optuna.

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Bitcoin Price Forecasting using Hybrid Deep Learning

PTM-Pre

A Streamlit-based web application for predicting multiple non-communicable diseases and providing recommendations using Retrieval-Augmented Generation (RAG).

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Social Network Analysis of the 2024 Presidential Campaign

Implemented Graph Neural Networks and the Louvain Algorithm to identify community clusters in complex social networks.

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Social Network Analysis of the 2024 Presidential Campaign

Personal Data Detection using Convolutional Neural Network

Developed a Convolutional Neural Network (CNN) model for detecting personal data in images.

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Personal Data Detection using Convolutional Neural Network

Skills

Technical Skills

Statistical Data Analysis

Predictive Modeling

Natural Language Processing (NLP)

Deep Learning

Data Visualization

Data Wrangling & Preprocessing

Data Science & ML

Python

R

SQL

TensorFlow

Scikit-learn

HuggingFace

Tools & Platforms

GitHub

Google Colab

VS Code

Streamlit

Looker Studio

AWS

About Me

Hi, I’m Biliarto Sastro Cemerson, a Statistics graduate with a strong analytical foundation and hands-on experience in the end-to-end data science lifecycle. Proven expertise in predictive modeling, NLP, and deep learning, backed by success in national-level data science competitions and data analytics. Skilled in transforming complex datasets into actionable insights using Python, R, and SQL to drive data-driven decision-making.