Main · Founder & CEO · 2022 – now
Pejuang OSN & Prestasi
An online platform where Indonesian students prepare for the National Science Olympiad (OSN) and build a portfolio of their achievements. Made by medalists, to make medalists.
- Students
- 23,388
- Schools
- 3,560
- OSN 2026 medalists who used it
- 139of 270
- Olympiad subjects
- 12
Why it exists
An olympiad medal opens real doors in Indonesia. SNBP counts achievements in university admission, ITB and UGM have entry paths for olympiad talent, and Beasiswa Talenta Indonesia fully funds an undergraduate degree for national medalists. In 2026, 941,692 students registered for OSN.
Most of them don't know where to start: what to study, in what order, and how to practice at olympiad level. Pejuang OSN & Prestasi gives them that path in one place.
What it does
- A study path in 6 milestonesMilestone Interaktif · Akademi OSNThe right books and training recordings for each subject, matched to the syllabus and reviewed by OSN medalists.
- Thousands of practice questionsBanjir Soal · Tryout mingguanQuestions and weekly tryouts at national olympiad level, written by OSN and international medalists, each with a worked explanation and an AI assistant.
- Curated competitionsInfo Lomba TerkurasiA panel of quality competitions, with a filter for the ones curated by Puspresnas.
- A communityPejuang OSN UniverseGuilds with weekly meetings and a Guild Master, so no student prepares alone.
The free plan includes weekly progress, weekly practice and the community. The Platinum plan adds tryouts, the milestones, curated competitions, Akademi OSN recordings, e-books, courses and the question bank.
Screens
Fig. 2Summary of a student's week 
Fig. 3What's done, missing and coming up 
Fig. 4Six milestones per subject
From the product's built-in demo profile.
Subjects
- Astronomy
- Biology
- Chemistry
- Earth science
- Economics
- Geography
- Informatics
- Physics
- Mathematics, senior high
- Mathematics, junior high
- Science, junior high
- Social studies, junior high
From medalists
“Pejuang OSN gives students across Indonesia a study guide, so they can prepare for OSN without feeling lost. It also connects them with other OSN students.”
“Many OSN students miss a medal because they have no study resources or direction. Clearly, Pejos solves this problem.”
My role
I founded Pejuang OSN in 2022 and lead it as CEO. Since 2024 it has run as a company, PT Pejuang Indonesia Cerdas, which also organizes OSBANAS.
I've been on the student side too: bronze, OSN Economics and IEO 2021.
Timeline
- Started Pejuang OSN.
- Held the first OSBANAS, the community's own national olympiad.
- Incorporated as PT Pejuang Indonesia Cerdas.
- Renamed Pejuang OSN & Prestasi. 139 of the 270 OSN 2026 medalists were users.