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raphaelokuyama

Raphael Okuyama

@raphaelokuyama

FullStack Developer

Brazil
English, Portuguese
About me
I am a Full-Stack Developer and Computer Engineering focused on building scalable digital solutions. My approach goes beyond writing code: I architect robust systems for performance and security, while keeping a keen eye on UI/UX Design. I specialize in complete SaaS platforms, fast APIs, and high-converting websites using React, Next.js, Node.js, and PostgreSQL. I also develop Python automations to eliminate manual work and reduce costs. Whether you need an application built from scratch or complex workflows automated, I deliver clean, business-driven results.... Read more

Skills

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raphaelokuyama
Raphael Okuyama
Offline • 
Average response time: 1 hour

See my services

Custom Websites
I will develop a high converting landing page for your business
From$100 / projectMore details
Full Stack Web Applications
I will build a full stack saas platform
From$300 / projectMore details

Portfolio

Work experience

Self_Employed

Self Employed

Self-employed • 4 yrs 1 mo

Full-Stack Software Developer @Mairinque City Hall

Feb 2025 - Present • 1 yr 3 mos

I am responsible for the end-to-end development, maintenance, and enhancement of critical software systems for the municipal public sector. My primary focus is on ensuring high application stability and optimizing full-stack structural performance (Front-end and Back-end). I engineer and maintain robust architectures to guarantee that these platforms deliver high availability, security, and maximum efficiency for both internal workflows and end-users.

Data Analyst & IT Technician @Mairinque Supermarket

Apr 2022 - Feb 2025 • 2 yrs 10 mos

I structured the IT infrastructure and led strategic data analysis initiatives within the retail sector. I built tools to optimize daily workflows, managed databases to extract actionable business intelligence, and streamlined operations. My work directly supported data-driven decision-making, improved system performance metrics, and significantly reduced operational bottlenecks across the business.