k
kota_yamaga

Kota Yamaga

@kota_yamaga

Software Engineer and Designer from Japan

Japan
Japanese
About me
Hi, I'm Kota, a software engineer and designer based in Japan. Over five years building systems at Japanese system integrators and a global consulting firm. In 2025 I started my own studio, AGAMAY. On Coconala, Japan's largest skill marketplace: 56 orders, 5.0 rating. How I can help: • Japanese flyers and brochures that read naturally • Logo vectorization and AI logo cleanup • Google Sheets and Apps Script automation • Python tools for data collection and Excel I work the Japanese way: details checked, deadlines kept, quick replies.... Read more

Skills

k
kota_yamaga
Kota Yamaga
Offline • 

See my services

Flyer Design
I will design a japanese flyer or brochure with correct typesetting
From$45 / projectMore details
Automations
I will automate google sheets, gmail and forms with apps script
From$40 / projectMore details

Work experience

Self-Employed_/ Freelancer

Founder, AGAMAY

Self-Employed / Freelancer • Self-employed

Sep 2025 - Present • 1 yr 1 mo

My own studio, run alongside my main engineering work. - Coconala, Japan's largest skill marketplace: 56 orders completed with a 5.0 rating, from business automation tools built with Google Sheets and Apps Script to logos and print design - Built and run an AI-based search demand analysis web service: a daily data collection pipeline, multilingual sentence embeddings, PostgreSQL with pgvector, the Claude API and Cloudflare Pages - Built and sell an offline desktop app for legal professionals (Electron) with license activation Tech: Python, JavaScript, Java, Google Apps Script, Electron, PostgreSQL, Adobe Illustrator

Confidential

Confidential

3 yrs 4 mos

Software Engineer and Project Lead

Apr 2024 - Present • 2 yrs 6 mos

Engineer on a global consulting firm's team that maintains and enhances a large core system for a financial-services client (team of 20+, with offshore members). - Lead small enhancement projects end to end: estimation, requirements, design documents, development instructions, test review and production release - Estimate effort with EVM, add risk buffers, and split the work into monthly development and test plans - Run client meetings, write minutes, and track issues and deadlines across the client, development and test teams - Assign and review tasks for up to 6 developers and testers and up to 5 offshore members; review about 20 test and design documents a month - Handle production releases, including overnight migrations with the client - Mask personal data in production logs before sharing them with offshore teams Tech: Java, Spring, JavaScript, Vue.js, SQL (DB2, PostgreSQL), Jenkins, Tomcat, AWS

Software Engineer, Japanese system integrator

May 2023 - Mar 2024 • 10 mos

Enhancement of a simulation platform that evaluates the safety of autonomous vehicles in a virtual environment. - Handled requirements and design for new features - Built MATLAB add-on packages, installers and manuals - Developed, tested and fixed an app that generates Simulink blocks automatically - Automated data exchange with MATLAB/Simulink in Python - Wrote C++ simulation scenarios, and managed documents in AsciiDoc and AWS CodeCommit Tech: MATLAB/Simulink, Python, C++, CMake, Node.js, Linux