I am a Computer Science student with a strong interest in data science and applied machine learning, with hands-on experience building end-to-end data projects that translate business problems into actionable insights. I am comfortable working with Python, data analysis, and exploratory research, with a collaborative mindset and a strong curiosity for AI-driven product development.

Rafael Jeremiah Cleo Batubara

I am a Computer Science student with a strong interest in data science and applied machine learning, with hands-on experience building end-to-end data projects that translate business problems into actionable insights. I am comfortable working with Python, data analysis, and exploratory research, with a collaborative mindset and a strong curiosity for AI-driven product development.

Available to hire

I am a Computer Science student with a strong interest in data science and applied machine learning, with hands-on experience building end-to-end data projects that translate business problems into actionable insights.

I am comfortable working with Python, data analysis, and exploratory research, with a collaborative mindset and a strong curiosity for AI-driven product development.

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Experience Level

Expert
Expert
Expert
Intermediate
Intermediate
Intermediate

Work Experience

Participant at Telekom CodeG ames
November 1, 2025 - Present
4-day online coding competition; solved algorithmic challenges (DFS, BFS, Kruskal’s); placed in top 25 out of 88 participants.
Teaching Assistant at University of Pécs - Mathematical Logic
September 1, 2025 - December 1, 2025
Delivered weekly consultations to 30+ first-year CS students, improving assignment scores and conceptual understanding. Identified learning gaps and created micro-explanations that reduced recurring student errors by 25%. Supported course operations by preparing graded feedback and ensuring smooth assessment flow. Collaborated with the lecturer to optimize class pacing, resulting in more efficient weekly sessions.
Teaching Assistant – Mathematical Logic at University of Pécs
September 1, 2025 - December 31, 2025
Delivered weekly consultations to 30+ first-year CS students, improving assignment scores and conceptual understanding. Identified learning gaps and created micro-explanations that reduced recurring student errors by 25%. Supported course operations by preparing graded feedback and ensuring smooth assessment flow. Collaborated with the lecturer to optimize class pacing, resulting in more efficient weekly sessions.
Private Python Tutor at Self-Directed
June 1, 2025 - Present
Mentored students through Python fundamentals, OOP, and data-focused mini-projects, leading to measurable improvements in coding assignments. Guided learners in building small-scale GUI and data analysis projects, reinforcing practical problem-solving skills and hands-on experience. Designed personalized learning programs and exercises to improve problem-solving skills.
Private Python Tutor at Self-employed (Jakarta, Indonesia)
June 1, 2025 - Present
Mentored students through Python fundamentals, OOP, and data-focused mini-projects, leading to measurable improvements in coding assignments. Guided learners in building small-scale GUI and data analysis projects, reinforcing practical problem-solving skills and hands-on experience. Designed personalized learning programs and exercises to improve problem-solving skills.
Participant at NASA Space Apps Challenge – Budapest
October 1, 2024 - Present
Placed 12th out of 25 groups; developed a geomagnetic-themed informational website using HTML & CSS, presenting key geomagnetic data and interactive visuals for a general audience.
Gold Medalist at POS Chemistry Olympiad
October 1, 2022 - Present
National high school chemistry competition; demonstrated advanced problem solving and analytics across chemistry topics.

Education

Bachelor's degree in Computer Science at University of Pécs
September 1, 2025 - January 13, 2026
High School Diploma at Binus School Bekasi
July 1, 2020 - June 30, 2023
Bachelor's Degree in Computer Science at University of Pécs
September 1, 2025 - January 13, 2026
High School Diploma, Science Stream at Binus School Bekasi
July 1, 2020 - June 30, 2023

Qualifications

Gold Medalist – POSI Chemistry Olympiad
October 1, 2022 - January 13, 2026
NASA Space Apps Challenge – Budapest
October 1, 2024 - January 13, 2026
Telekom Code Games
November 1, 2025 - January 13, 2026
Gold Medalist – POS Chemistry Olympiad
October 1, 2022 - January 13, 2026
NASA Space Apps Challenge – Budapest
October 1, 2024 - January 13, 2026

Industry Experience

Computers & Electronics, Education, Professional Services, Software & Internet, Media & Entertainment