Kyohei Fukuda

OSS Developer / Developer Advocate

About

I work as an engineer at a global IT tech company while developing OSS libraries and creating content for developers.

• X (@labelmake)
• YouTube (@kyohei_dev)
• GitHub (@hand-dot)
• Zenn (@hand_dot)
• LinkedIn

Career

Wix

Developer Advocate / Solution Engineer | Feb 2023 - Present

Technical consulting and problem-solving across the Wix platform, centered on Wix Developers.

Nulab Inc.

Software Engineer | Jan 2021 - Jan 2023

Development of project management tool Backlog.

Sharefull Co., Ltd.

Software Engineer | Aug 2018 - Jan 2021

Launch and development of gig work matching platform Sharefull.

PERSOL PROCESS & TECHNOLOGY

Software Engineer | Apr 2016 - Aug 2018

Development of HR management system HITO-Link.

Works

OSS

pdfme - An open-source PDF generation library built with TypeScript. GitHub 3,900+ stars, 100K+ weekly downloads.

Products

labelmake.jp - A PDF label creation service for address labels and barcodes. $4K MRR, 300K monthly page views.

Writing

• TechBookFest 20 - Vibe Coding Vulnerabilities
• CodeZine / Shoeisha - Introduction to Security in the Generative AI Era (4-part series)
• Software Design / Gihyo - Feb 2026 Issue: Complete Guide to Vibe Coding
• Findy Engineer Lab - How Open-Sourcing My Personal Utility Function Changed My Life

Speaking

• Offers_DeepDive - Security Risks of Vibe Coding: Insights from an Engineer Who Discovered 10,000+ PII Leaks
• Developers Summit 2026 - The Trap of Vibe Coding: Security Pitfalls Every Developer Should Know
• Findy Todan Zenya - The Courage to Stop Chasing Technology - A Career as an Expert

YouTube

Channel @kyohei_dev

Topics: Security, AI development tools, OSS, Career

Sponsored content: CodeRabbit, NearStream, Tech-Go, and more (dev tools, gadgets, career services)

Community

Sancha.dev - An engineer community in the Sangenjaya area of Tokyo. Organizer.

Services

Technical Advisory

Ongoing technical partnership. Code review, architecture consulting, security checks, and hands-on implementation as needed. For startups with 5-20 engineers.

Security Audit

Security audits for code written with Vibe Coding and generative AI. OWASP Top 10-based code review, vulnerability report, and remediation recommendations. For startups and SMBs using AI-assisted development.

pdfme Integration

Direct support from the creator of pdfme. Integration architecture, custom template development, API design. For companies building in-house PDF/document processing (worldwide).

Platform Integration

Solution engineering for Japanese companies adopting international tech platforms. Working directly with the platform’s engineering team to deliver best practices. Communication available in both Japanese and English.

Writing, Speaking & Sponsored Content

Technical articles, books, conference talks, corporate training. Product introductions on my YouTube channel (dedicated videos, mid-roll ads, etc.).

Contact

For business inquiries: kyohei@pdfme.com

Please include:

• Type of request
• Project overview
• Timeline and budget

Hit me up on X DMs anytime for hangouts or coffee! Let’s grab lunch in Sangenjaya.