Jerome Polin Sijabat: Evidence Dossier
CEO at Mantappu Academy, math and education content creator. Evidence captured June 21, 2026 and drawn from the comparative analysis published by InfraLoka.
Snapshot
Jerome Polin Sijabat is the CEO of Mantappu Academy and a math and education content creator. His Instagram audience was recorded at 9.5 million followers on June 21, 2026, the largest of the five people in this series. This dossier expands his section of the Engineering Expertise Comparative Analysis, using only the evidence recorded there.
Verified record
Education. Waseda University (Japan), Bachelor's degree in Computational and Applied Mathematics, 2018–2022. He is recognized by Forbes 30 Under 30 Asia and Fortune 40 Under 40 Indonesia.
Domain alignment. The comparative analysis notes that a degree in applied mathematics aligns with the content of a math-education platform, and that it is unrelated to software engineering or cloud-native infrastructure engineering.
Product audit
The audit looked at the Mantappu Academy website (mantappuacademy.com).
- Google PageSpeed Insights: 93 on desktop and 70/100 on mobile.
- Core Web Vitals: failed on both desktop (due to field latency) and mobile.
- Wappalyzer technology audit: Next.js 15.5.7, React, Supabase and Tailwind CSS, hosted on Railway and Vercel.
Assessment
The comparative analysis rated this case Moderate-High on its Dunning-Kruger scale. Its reasoning: his credibility in mathematics and education is exceptional, but it does not translate into software engineering expertise, and a very large following can create a "halo effect" in which audiences assume general technology mastery.
The analysis scores six dimensions out of 10. For Jerome Polin Sijabat the recorded scores are:
| Dimension | Weight | Score |
|---|---|---|
| D1 Academic Credentials | 20% | 7 |
| D2 Technical Certifications | 20% | 1 |
| D3 Product Engineering Quality | 20% | 4 |
| D4 Tech Stack Sophistication | 15% | 6 |
| D5 Founder Engineering Depth | 15% | 3 |
| D6 Cloud & Infrastructure Expertise | 10% | 1 |
The weighted score is 38.5 out of 100.
Limits and right of reply
- This is an assessment based on public sources captured on June 21, 2026. It describes a website and a public profile, not the person's character or whole career.
- The comparison measures one website's engineering metrics. It does not assess his work in mathematics education, which the comparative analysis itself describes as exceptional.
- Jerome Polin Sijabat or his representatives may reply or request a correction at admin@infraloka.co.id. Verified corrections will be published here.
Sources
- LinkedIn Corporation. (2026, June 21). Public profile data.
- Wappalyzer Technology Profiler. (2026, June 21). Technology audit.
- Google PageSpeed Insights. (2026, June 21). Google Lighthouse v13.6.0.
- Full method and the other dossiers: Engineering Expertise Comparative Analysis
- Also in this series: Timothy Ronald · Raymond Chin · David Alfa Sunarna · Sabda PS