Dennis Jonathan
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About.

Hey, I'm Dennis — I like solving problems, learning stuff, and building things that (hopefully) make life a little easier. I've got a background in math and stats, but these days I'm more into what you can do with that knowledge — especially when it comes to AI, automation, and making things a bit smarter than they were yesterday.
I've built and shipped ML apps, worked across different stacks, and helped teams get real value out of messy data. But honestly, what excites me most isn't just the tech — it's the moment when something clicks for someone, or when a rough idea turns into something real. I'm into making AI less intimidating, more useful, and ideally a little more fun. Whether it's prototyping tools, building out workflows, or just tinkering until something works — that's my happy place.
Outside of work, you'll usually find me reading ML papers I don't fully understand (yet), scribbling down half-finished ideas, tearing through comics, or doing laps in sim racing like it actually matters. I'm a big fan of side projects — the stranger the better — and I really enjoy working on stuff that doesn't have a clear roadmap. I think good ideas come from unexpected places, and I try to stay open to all of it.
If you're into data, design, or just making cool things — feel free to reach out. I'm always down to talk shop, swap ideas, or build something awesome together.
Work Experience.
February 2024 - Now
Analytics, AI, & ML Staff
Sinarmas Land
- Spearheaded the optimization of OCR pipelines, leading to significant enhancements in document information extraction accuracy and processing velocity.
- Architected and successfully deployed an innovative AI-powered document summarization system, which drastically reduced sales letter review durations.
- Developed and seamlessly integrated automated OCR services for invoices and tax documents, achieving high-accuracy document processing at a significant scale.
- Experimented with and implemented cutting-edge AI models for document processing, including OCR, LLMs, and RAG, to enhance the company's data extraction and analysis capabilities.
- Engineered a robust enterprise agentic chatbot utilizing LangChain and OpenAI, effectively streamlining internal communications across diverse departments.
November 2023 - January 2024
ML/AI Developer and Tester Intern
Sinarmas Land
- Actively contributed to the maintenance and advancement of the company's proprietary machine learning pipelines, with a primary focus on OCR systems for document information detection and extraction.
- Collaborated in the creation of novel OCR pipelines specifically designed for Vehicle Registration Number (VRN) detection and extraction.
August - December 2022
Business Intelligence Analyst Intern
Vidio.com
- Played a key role in generating actionable insights and fostering a deeper understanding of platform user behaviors and product analytics through SQL and advanced visualization tools.
- Conducted in-depth research on user funneling progression, customer retention strategies, and cancellation patterns.
January - February 2020
Marketing Research Intern
Universitas Prasetiya Mulya
- Assisted in identifying and evaluating potential strategic partners for the successful launch of Universitas Prasetiya Mulya's Master's program in Business Analytics.
- Performed comprehensive competitor research to pinpoint opportunities for enhancing and optimizing marketing initiatives.
August 2019 - August 2023
Bachelor of Mathematics
Universitas Prasetiya Mulya
- Graduated with a distinguished GPA of 3.88.
- Authored a thesis on "Predictive Modelling of Changes in GOTO Stock Prices using Historical and Exogenous Data with LSTM and SARIMAX".
- Honored as a beneficiary of the prestigious Young Scholar Indonesia Scholarship.
Projects.

Document Rotation Classification
May 2025
Sometimes a slight nudge is all it takes to get documents straight

Act Natural
December 2024
Teaching AI to act human? Spoiler alert: it's beautifully chaotic.

Bird Classifier on EfficientNet-B2
November 2023
Ever wondered what bird you're looking at? This classifier has over 90k downloads on HuggingFace's model hub.
Skills.
Feel free to reach me here.
© Dennis Jonathan 2025