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<h1 align="center">R.D.Sakamoto(Ryu Sakamoto)</h1>

<div class="link-buttons">
  <a href="#topic1">PORTFOLIO</a>
  <a href="#topic2">Career Summary</a>
  <a href="#topic3">Core Skills</a>
  <a href="#topic4">Professional Experience</a>
  <a href="#topic5">Additional Activities</a>
  <a href="#topic6">Certifications</a>
  <a href="#topic7">CONTACT & LINKS</a>
</div>

<a id="topic1" href="#topic1"></a>

## PORTFOLIO

This is the portfolio and resume page for R.D.Sakamoto (Ryu Sakamoto).
It focuses on professional experience, key achievements, skills, and public links.

- English version: [https://skmt3p.com](https://skmt3p.com)
- Japanese version: [https://skmt3p.com/ja/](https://skmt3p.com/ja/)
- GitHub repository: [Skmt3P/skmt3p](https://github.com/Skmt3P/skmt3p)

<br>
<a id="topic2" href="#topic2"></a>

## Career Summary

As a **TPM (Technical Project Manager) who can work across both technology and business**, I have driven a wide range of projects from management to hands-on development, covering web development, project management, business operations, and organization management.

At university, I studied media and regional revitalization, then earned the Fundamental Information Technology Engineer certification to build a career in globally applicable IT. At TIS Inc., I worked as an SAP ERP consultant and experienced the full delivery cycle from requirements definition and design to development, testing, and operations.

After that, I moved closer to product creation through web development at Step IT Solution Co., Ltd. and through self-employed work. As a self-employed professional, I also worked outside pure engineering, including doujin event operations, writing, and ICT instruction.

I joined HIKKY Co., Ltd. as the company's first dedicated engineer in the web frontend domain. I built frontend architecture used across the company, created coding guidelines, helped launch the team, and handled management responsibilities. From 2024, I led the Web-related Technology Development Department. In October 2025, after the results of an event business I had personally driven in Sapporo were recognized, I became Head of the Project Management Department. Due to career planning based in Sapporo and changes in life stage, I left the company in September 2026.

I am currently building a career as a **TPM x FDE (Forward Deployed Engineer)** with Codex as an AI partner.

<br>
<a id="topic3" href="#topic3"></a>

## Core Skills

### TPM / Project Management

- Project execution across pre-sales planning, requirements organization, progress management, delivery, business planning, and organization management
- Planning, alignment, and execution support between planning, sales, development, and production teams
- Proposal, delivery, and scaling design with upsell and cross-sell opportunities in mind
- Cost and revenue management, improvement proposals, and organization improvement planning

### Web Development / Technical Management

- Web frontend development centered on Vue.js, Nuxt.js, and TypeScript
- Frontend architecture design, coding guidelines, and code review
- Development process improvement using Zod, GitHub Actions, Jira, and Figma
- R&D, member support, and development workflow improvement

### AI Utilization / FDE

- Planning, requirements organization, implementation support, and documentation using ChatGPT, Codex, and Claude
- Breaking down field-level problems from technical, operational, and business perspectives into executable plans
- Continuous workflow improvement and product validation by combining AI with a local development environment

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<a id="topic4" href="#topic4"></a>

## Professional Experience

### 2025/10-2026/09: HIKKY Co., Ltd. / Head of Project Management Department

#### Scope
Project management, planning, accounting, business-unit and company-level management

#### Responsibilities
As Head of the Project Management Department, I worked across pre-sales planning, requirements organization, progress management, delivery, business planning, and organization management. Using my technical understanding from web development, I connected planning, sales, development, and production teams and translated projects into executable plans.

Across multiple projects, I contributed not only to delivery but also to scaling upsell and cross-sell opportunities. I also worked beyond field-level execution, including cost and revenue management proposals for executive members, execution of improvement measures, and organization improvement planning.

#### Technologies / Tools
ChatGPT, Codex, Claude, Jira, GitHub, Figma

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### 2024/04-2025/09: HIKKY Co., Ltd. / Head of Web-related Technology Development Department

#### Scope
Requirements definition, design, development, business-unit management

#### Responsibilities
As the manager responsible for the web development organization, I handled department operations, technical direction, R&D, member support, code review, and development process improvement. I connected management and business-side requirements with implementation feasibility and continuously improved the Nuxt / TypeScript-centered web development organization.

#### Technologies / Tools
Nuxt.js, TypeScript, Zod, GitHub Actions, Jira, Figma

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### 2021/05-2024/03: HIKKY Co., Ltd. / Chief Frontend Engineer

#### Scope
Requirements definition, design, development, team management

#### Responsibilities
Joined as the company's first dedicated engineer in the web frontend domain. I worked on frontend and BFF development for multiple to-C and to-B web applications and VR applications.

I drove multiple projects while building company-wide frontend architecture. I also created coding guidelines and handled team setup and management end to end.

#### Key Achievements

- Some web pages I helped develop were featured and curated on external web design gallery sites.

#### Technologies / Tools
Nuxt.js, TypeScript, Zod, GitHub Actions, Jira, Figma

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### 2018/10-Present: Self-employed

Based in Japan and abroad, I have worked mainly as an engineer while also taking on web development, project management, event operations, instruction, writing, and other roles.

#### 2025/01-Present: VketReal in Sapporo Operations

For a virtual-domain exhibition and sales event held in Sapporo, I served as project manager and worked across planning, sales, negotiation, legal affairs, accounting, web development, project management, and event operations. I handled a wide range of responsibilities as PM for an event where more than 700 people gathered.

Key achievement: Drove the planning and operations of an event attended by more than 700 people as a self-employed project manager.

Technologies / Tools: Nuxt.js, TypeScript, Cloudflare, Codex

#### 2020/10-2021/03: Web Application Development for a Web Production Company

Handled frontend development for a B2B web application.

Technologies / Tools: Nuxt.js, TypeScript, Firebase

#### 2020/02-2020/12: Web Application Development for a Web Production Company

Provided broad development support for a to-C web application, including architecture-level work such as introducing a Repository-Factory pattern and proposing architecture improvements.

Technologies / Tools: HTML, CSS, Nuxt.js, Laravel, Adobe XD, Trello, Chart.js

#### 2020/02-2020/04: CMS Development for a Web Production Company

Handled frontend development, WYSIWYG editor selection, and design proposals for a to-C web CMS.

Technologies / Tools: Nuxt.js, Element UI, HTML, CSS, Adobe XD

#### 2019/09-2019/12: Web Application Development Across Multiple Projects

Handled web frontend development and team management across multiple projects.

Technologies / Tools: Nunjucks, HTML, CSS, Adobe XD

#### 2019/04-2019/08: Web Application Package Development for a Map-related Company

Developed to-C products and B2B packages, and handled team management. I also coordinated with PMs, sales, and designers, and served as an instructor for Vue.js study sessions.

Technologies / Tools: Vue.js, Git, Docker, Webpack, Backlog

#### 2018/10-2019/01: Web Application Development for an AI Company

Developed the frontend and API portions of an AI image learning service. As project leader, frontend engineer, and backend engineer, I handled REST API development, frontend development, and team management.

Technologies / Tools: Angular, Nest.js, Node.js, Docker, MySQL, PostgreSQL, MongoDB, Python

#### 2018/01-2018/03: Service Website Development

Developed a website for a freelance photographer. I handled requirements definition, design, outline design, frontend development, and CMS development.

Technologies / Tools: PHP, HTML, CSS, jQuery

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### 2017/04-2018/09: Step IT Solution Co., Ltd. / RPA Engineer, Web Frontend Engineer

#### Scope
Outline design, detailed design, development, QA

#### Responsibilities
Developed business management web applications and HPOO-based RPA for a telecommunications company. To gain the ability to create products myself, I transitioned from consulting to engineering and delivered fail-safe features designed to minimize impact when errors occurred.

#### Technologies / Tools
HPOO, ExtJS, shell, VBA

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### 2014/04-2017/03: TIS Inc. / SAP ERP Consultant

#### Scope
Requirements definition, design, development, testing, operations

#### Responsibilities
Joined as a new graduate and worked as an SAP ERP consultant. As part of an independent prime vendor, I participated in projects involving SAP ERP customization, report development, and business system support from requirements definition through operations.

I worked across upstream and downstream phases with partner vendors and learned the full delivery process from waterfall-style requirements definition through development.

#### Technologies / Tools
SAP ERP (FI, SD, MM), ABAP

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<a id="topic5" href="#topic5"></a>

## Additional Activities

Separate from the professional experience above, I also have experience in public communication, education, and community activities.

- **OmusBridge OÜ President / Management Board Member**: Business planning, MVP exploration, web application development, coaching, consulting, and project management for company products.
- **Writer for the web media "& Engineer"**: Handled interviews with engineers and article writing.
- **Cafetalk ICT Instructor**: Answered a wide range of questions, from Office products to programming.
- **VR / Metaverse Activities**: Created avatars and worlds, and organized events inside metaverse services.

<br>
<a id="topic6" href="#topic6"></a>

## Certifications

- Fundamental Information Technology Engineer
- Applied Information Technology Engineer
- SAP Certified Consultant (FI)
- Japan Chamber of Commerce and Industry Bookkeeping Grade 3
- Standard automobile driver's license
- Standard motorcycle license

<br>
<a id="topic7" href="#topic7"></a>

## CONTACT & LINKS

<div class="link-buttons">
  <a href="https://skmt3p.com" target="_blank" rel="noopener noreferrer">Portfolio</a>
  <a href="https://www.facebook.com/Skmt3P/" target="_blank" rel="noopener noreferrer">Facebook</a>
  <a href="https://github.com/Skmt3P" target="_blank" rel="noopener noreferrer">GitHub</a>
  <a href="https://www.linkedin.com/in/ryu-sakamoto-91957152/" target="_blank" rel="noopener noreferrer">LinkedIn</a>
  <a href="https://omusbridge.com" target="_blank" rel="noopener noreferrer">OmusBridge</a>
</div>

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<img src="./static/img/logo_omusbridge.png" width="80px" />
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