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I am a Computer Science student with a strong interest in software engineering, machine learning, and data-related fields. I enjoy building efficient systems, solving real-world problems with code, and leveraging data to drive intelligent decision-making. I continuously develop my skills through hands-on projects and ongoing learning, and I am motivated to grow and contribute in the tech industry.…I am a Computer Science student with a strong interest in software engineering, machine learning, and data-related fields. I enjoy building efficient systems, solving real-world problems with code, and leveraging data to drive intelligent decision-making. I continuously develop my skills through hands-on projects and ongoing learning, and I am motivated to grow and contribute in the tech industry.

RAFAEL SIMARMATA

Web Developer, Full Stack Developer, Back-End Developer, +2

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I am a Computer Science student with a strong interest in software engineering, machine learning, and data-related fields. I enjoy building efficient systems, solving real-world problems with code, and leveraging data to drive intelligent decision-making. I continuously develop my skills through hands-on projects and ongoing learning, and I am motivated to grow and contribute in the tech industry.…I am a Computer Science student with a strong interest in software engineering, machine learning, and data-related fields. I enjoy building efficient systems, solving real-world problems with code, and leveraging data to drive intelligent decision-making. I continuously develop my skills through hands-on projects and ongoing learning, and I am motivated to grow and contribute in the tech industry.

Available to hire

I am a Computer Science student with a strong interest in software engineering, machine learning, and data-related fields. I enjoy building efficient systems, solving real-world problems with code, and leveraging data to drive intelligent decision-making. I continuously develop my skills through hands-on projects and ongoing learning, and I am motivated to grow and contribute in the tech industry.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Language

Indonesian

Fluent

English

Advanced

Work Experience

Software Engineer Intern at PT Bank Sumut

August 1, 2025 - December 1, 2025

Developed and maintained the backend for a company-wide ticketing website using Golang and the Gin framework; implemented a real-time notification system that emails administrators and assigns technicians on ticket events; designed and managed the PostgreSQL database schema with GORM and leveraged Redis caching to improve API response times; enhanced security with a Fixed Window Rate Limiter to prevent API abuse.

External Code Reviewer at Dicoding Indonesia

June 1, 2025 - Present

Evaluated 200+ machine learning/data science projects (NLP, image classification, end-to-end ML systems); provided detailed technical feedback, enforced best practices, and maintained high validation accuracy.

Laboratory Assistant at Universitas Sumatera Utara

January 1, 2024 - June 30, 2025

Collaborated with lecturers to design modern lab modules and interactive coding exercises; guided CS students in Data Structures, OOP, and Probability & Statistics, achieving a 95% pass rate.

Web Developer at Dinas Perhubungan Kabupaten Batubara

September 1, 2023 - January 31, 2024

Engineered a user-friendly WordPress landing page with strong CTAs and intuitive design to support regional transportation initiatives.