Hi, I'M KOSEI

PROFILE

Kosei Ayabe

Hi, I'm Kosei — a freelance software engineer based in Tokyo.
I was born in 1997 in Shizuoka, Japan, and studied computer science at university.
After graduation, I joined a major system integration company, where I worked as a systems engineer for about two and a half years.
In January 2023, I decided to take the leap and started my career as a freelancer. Outside of work, I love traveling, saunas, reading books, and enjoying manga and anime.
I'm also into board sports like skateboarding, surfing, and snowboarding.
Recently, I've been studying English a lot.

SKILL

C# 5 years 90%

System / API Development

Proficient in developing applications using the .NET framework.
Capable of handling both front-end and back-end architecture and implementation.

SQL Server 5 years 90%

Comprehensive Database Management

Experienced in all aspects of database operations, including integration with applications, as well as table and database design, construction, and server management.

HTML/CSS 5 years 80%

Front-End Development

Skilled in web design and coding. Capable of building websites and landing pages from scratch, as well as modifying existing sites.

WordPress 3 years 80%

Website Creation

Experienced in building websites using WordPress.
Able to create visually rich sites using premium themes.

AWS 2 years 50%

Cloud Infrastructure Setup

Able to set up system environments on the cloud using AWS.
Experienced in configuring servers, networks, and storage.

JavaScript 2 years 50%

Front-End Development

Experienced in using JavaScript for basic front-end development.
Capable of implementing simple animations and handling data integration via API calls.

HISTORY

Let's explore my life!

1997

Born in Shizuoka

As a kid, I was always outside or playing video games.
In junior and senior high school, I got hooked on skateboarding.
I also played volleyball in school clubs and was quite good at academics—at least until junior high.
Around that time, I started vaguely dreaming about becoming an entrepreneur.

2016

Entered IT Faculty

I was fascinated by the world of the internet, social media, and apps.
That’s when I started thinking I wanted to become an engineer someday.
Around that time, a Japanese TV drama about a young CEO running a tech company was on air, and the main character really inspired me.
That sparked my decision to study programming at university. So I decided to study programming in university.
Although I was failing academically during high school because I was focused on sports,
I worked hard in my final year and managed to get into my top-choice national university.

2020

Graduated and Started Career

Just as I graduated and got hired, the COVID-19 pandemic hit, and I started working fully remotely.
As a company employee, I moved around Japan—Chiba, Kumamoto, Hiroshima—over the course of two and a half years.

2022

Became a Freelancer

After about 2.5 years, I decided to quit.
I wanted to work in Tokyo and had a strange but strong sense of confidence—"I can do this."
So I moved to Tokyo with no plan and became a freelancer.
I eventually learned how to survive on my own,
but realized that technical skills alone weren’t enough to make a big impact.
After a lot of soul-searching, I decided to learn English and aim to work abroad as an engineer.

2024

Studied in Cebu

Eventually, I felt I had hit a wall in Japan and decided to study abroad.
I spent three months in Cebu, Philippines, on a language exchange program.
I had so much fun living overseas and making international friends that I decided to go on a working holiday the following year.

2025

Working Holiday in Canada (Plan)

It's close to the U.S. and Silicon Valley—the heart of global tech.
I believe Canada is the perfect place to take the next step in my journey.
I plan to leave in July 2025.

WORKS

FLOWER SHOP HANA*HANA

This is a flower shop located in Kannami Town, Shizuoka, my hometown.
I was in charge of designing and developing the website from scratch using WordPress.

negura campground

This is a campsite based in Kannami Town, Shizuoka, where I’m originally from.
I built the entire website from scratch using WordPress.

CONTACT

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