I am Javier,
an independent embedded systems & frontend
developer
About
I am Javier Rayhan A., a dedicated tech enthusiast with a strong passion for IoT, AI, and embedded systems. As a admitted student at Telkom University (Informatics), I specialize in developing microcontroller-based projects, particularly using ESP32, C++, and advanced hardware integrations.
Download CVExpertise
- Visual Design
- Branding Identity
- Embedded System
- Product Design
- Prototyping
- PCB Design
Experience
At Home
Product Designer Hobbiest
July 2024 - Present
Developing innovative projects focused on IoT and embedded systems using ESP32 and AI technology. Specializing in hardware-software integration to create efficient and creative solutions.
Samsung Innovation Campus
Embedded System Developer
May 2024 - July 2024
Gained hands-on experience in embedded systems programming, microcontroller development, and sensor integration. Worked on IoT-based smart device projects with an emphasis on power efficiency and wireless communication.
Education
SMAN 1 Bobotsari
Master in Cinematography
July 2022 - July 2025
Studied cinematography techniques, camera operations, and professional video editing to produce high-quality digital storytelling and documentation.
Telkom University
Informatics
September 2025
Admitted student.
Recent Works
Here are some of my favorite projects I have done lately. Feel free to check them out.
DIY Heat Plate
The Heat Plate Controller OLED/16x2 I2C is a microcontroller-based temperature controller using a relay and thermistor, with real-time display via OLED or 16x2 I2C LCD. It allows temperature adjustment with a rotary encoder and automatically controls heat, perfect for DIY soldering stations or compact heating devices.
- Open Source
- DIY
- ATmega8/168/328
ESP32 Digital Photo Frame
This project is a special creation made with love and tech, a digital keepsake designed to celebrate graduation and create lasting memories for my friends and loved ones. It’s more than just electronics, it’s a symbol of connection, gratitude, and unforgettable moments.
- Open Source
- DIY
- ESP32
KATO Macro by Exter
KATO Macro is more than just a keyboard, it’s a compact, powerful, and personal input device designed to make your daily digital workflows smoother, faster, and a lot cooler.
- CC BY-NC 4.0
- DIY
- ESP32
Since Day One
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- Website
Sand Dunes
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- Illustration
Minimalismo
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- Branding
- Product Design
Tim Cook
CEO, Apple
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Sundar Pichai
CEO, Google
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Satya Nadella
CEO, Microsoft
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Jeff Bezos
CEO, Amazon
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Get In Touch
I love to hear from you. Whether you have a question or just want to chat about IoT, embedded system even app design, shoot me a message.