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Projects

Engineer's Role

At Grune, an engineer's job is not "writing code". It's about designing, judging, and having AI implement. In an environment where AI is embedded throughout every development stage, we focus on work that only humans can do.

  • From spec to implementation, AI runs alongside every stage. PM drafts specs with AI, engineer plans with AI, writes tests first, then AI implements. The human role is deciding 'what to build' and 'does this look right?'
  • Every commit runs automated quality checks. Format, lint, and type-check run automatically before commit. Test-driven development is standard; quality rules are unified and distributed automatically across all projects.
  • Everything from specs to implementation code is traceable. The full spec→plan→code→review chain is documented. You can always trace back to 'why this decision was made
  • Customer-isolated project environments with access control. Each project is separated, and quality rules and dev settings automatically roll out to the entire team.
  • Zero admin staff. All internal admin has migrated to AI: document creation, meeting minutes, chat management. Every role — not just engineers — operates with AI as a given.
AI Development Environment

Member's Voice

AI First System Development

Daichi Ikarashi

五十嵐 大地

Daichi Ikarashi

AI Consultant/PM

I work with multiple AIs every day to advance multiple projects.

At Grune AI Technologies, we connect AI agents with many business tools and use AI to advance many tasks together — from requirements definition, design, and implementation to daily progress management and team chat. I've been with the company for four years, but by leveraging AI's vast knowledge, research capabilities, and overwhelming processing speed, I've built a work style that balances reliability and speed, independent of years of experience. The entire company has now adopted Claude Code, shifting to a fully AI-powered environment. With AI handling much of the routine work, we are actively taking on more creative, human-centric challenges like client communication, UI/UX optimization, and business process improvement.

Attractive Project

Fascinating AI Projects,
And Exciting Environment

AI酒ラベル認識アプリ: AI画像認識システムを利用して商品情報を表示
AIシステム/Web

AI酒ラベル認識アプリ: AI画像認識システムを利用して商品情報を表示

Development Language:

Next.js, Python, TensorFlow, Faiss, Flask, TypeScript, React Native, Express.js, Zod, Prisma, tRPC, Monorepo, Mantine

AIナンバープレート認識システム / Web管理画面: AI画像認識システムで車両管理
AIシステム/Web

AIナンバープレート認識システム / Web管理画面: AI画像認識システムで車両管理

Development Language:

JavaScript, TypeScript, Next.js, React.js, Express.js, Prisma, Zod, tRPC, Cypress, LINE Messaging API, AWS S3

提案書のAI自動作成+AIチャット
AIシステム/Web

提案書のAI自動作成+AIチャット

Development Language:

React.js, Python, LLM

AI分析サポート+即時グラフ作成
AIシステム/Web

AI分析サポート+即時グラフ作成

Development Language:

React.js, Python, LLM

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Adopted for
"G-STARTUP"

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Grune AI Technologies capabilities were recognized and selected as part of the acceleration program "G-STARTUP (money forward president Tsuji et al.)" for companies aiming to be unicorns, provided by Globis.

See details of G-STARTUP icon-window

We Received an Official
Recommendation from
the Indonesian Embassy

We choose to establish our development centre for IT services in Southeast Asia, including Indonesia which is currently a rapid growing country.
Grune AI Technologies has received an Official Recommendation from the Indonesian Embassy in Japan as a company that promotes bilateral relations between Japan and Indonesia in the creative field.

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For Members

Grune AI Technologies Is Here for
Its Members

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We promise the company's profit will be
shared to the members.

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We treasure how we should spend our
working time with joy.

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Everyone can discuss what kind of company
they want Grune AI Technologies to be and the ideal company to strive for.

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01

There are "Club Activities" for facilitating the communication between members! Communication is very important in Grune AI Technologies to develop good relationships among members to grow. You can add more club activities based on your idea.

The activities of each club are posted on the Club Activity Blog.

  • ・Snowboard Club
  • ・Coffee Club
  • ・Sauna Club
  • ・Surfing Club

02

Grune AI Technologies will be listed on the stock exchange and will continue to develop further. Before listing, Grune AI Technologies distributes stock options as rewards to members based on their contributions. Regardless of age, gender, or years of service, we promise a return commensurate with those who think things through and produce results.

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More than half of the leaders are made up of female members. We allow remote work according to each life stage, such as marriage and childbirth. Maternity leave and childcare leave are also available. We also have a track record of taking childcare leave for male members. There are many other systems that incorporate the voices of female members, such as menstrual leave! We are actively adopting a system based on the opinions of our members so that each employee can work energetically and in their own way.

From CEO

Representative Message

山下 敏義

Toshichika Yamashita

Representative Director, CEO

After graduating from university, I worked as a programmer for a Switzerland-based company in a Germany Branch. I developed business systems, web systems, and mobile applications for European car and luxury watchmakers. After returning to Japan, I became independent and established Grune AI Technologies Inc. I set up development centers in Asia such as Yogyakarta and Bali, Indonesia.

My hobbies are surfing, hiking, and snowboarding. I want to create an environment where I can enjoy IT development while traveling to mountains and beaches around the world. My mission is for every member of Grune AI Technologies to play to the fullest and truly enjoy their lives..

Read the CEO AI Blog icon-window
山下 敏義
山下 敏義
山下 敏義
山下 敏義
AI教養で差をつける:ビジネスパーソン必読の基礎知識 2025秋版

We have published “AI Literacy for a Competitive Edge: Essential Knowledge for Business Professionals – Autumn 2025 Edition”

Grune AI Technologies Inc. has published the book “AI Literacy for a Competitive Edge: Essential Knowledge for Business Professionals – Autumn 2025 Edition”, a compilation and reorganization of the “CEO AI Blog” written by our CEO, Toshichika Yamashita.

Interview

Member Interview

Tomas Sullivan

To Build Reliable Systems for The Future

Tomas Sullivan

Project Manager

Read
大寺 志乃

圧倒的成長と自分の可能性を広げるために

大寺 志乃

Project Manager

Read
Ida Hendra

Building A Strong and Professional IT Team

Ida Hendra

General Manager

Read
Dirga Paradila

Building Something Easy to Use is Difficult

Dirga Paradila

Web Developer

Read
Mavindra Adiyasa

Do Your Best, The Second Chance is Uncertain

Mavindra Adiyasa

Web Developer

Read
Sarisha Paramitha

When Life Gives You Lemon, Make Lemonade

Sarisha Paramitha

Web Developer

Read
View All

The Environment Where Women background icon Can Play An Active Role

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A women leader was the first to go for a business trip to Bali after the COVID-19 pandemic had settled down. (Overseas Business Trip Blog)

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More than half of the leaders are Women.

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Many men also take advantage of parental leave.

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Even if your life stage changes, you can be active with remote work!

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Menstrual leave was introduced in response to member feedback.

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Ideal Candidate Profile

The Candidate We Are Looking For

Who Should Apply?

  • Those who want to maximize their market value by using AI tools like Claude Code to the fullest.
  • Those who want to be an engineer who can play an active role globally.
  • Those who are intensely motivated and already actively learning on their own.

Who Should Not Apply?

  • Those who do not want to grow by actively trying to learn by themselves.
  • Those who are not excited about new technology and do not want to jump out from their comfort zone.
  • Those who do not enjoy a rapid growth.

Process

Recruitment Process

01

Please Contact Us

Feel free to ask anything from the inquiry form.

02

Casual Remote Meeting

We will hold a casual remote interview. Feel free to ask us anything directly.

03

Application

If you are interested, please apply.
You can use the inquiry form, call us, or visit us at the office.

04

Recruitment Interview

We will have a hiring interview. We also perform a technical test if necessary.

05

Unofficial Offer

It takes about a week from the application to the notification of acceptance or rejection.

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Interested in Grune AI Technologies?
Feel free to reach out.

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Information

Recruitment Information

Salary

With Experience: JPY 350,000/Month~

[Sendai Member: Salary Examples]
26 years old 2nd working years: 430,000yen/month(bonus twice a year)

Work Location

  • Sendai Office
    Intellex Building 8F, 1-6-23 Honcho, Aoba-ku, Sendai, Miyagi
  • Indonesia: Bali Office
    ※Overseas office are available for those who are interested.

Bonus

Twice a year. Determined by performance and evaluation.

Salary Increases

Twice a year. Determined by evaluation.

Various Allowance

  • Transportation (Up to JPY 15,000/Month).
  • Overtime Allowance.

Holidays

  • 2 days/week (Saturday and Sunday), public holidays.
  • Year-end, new year, and summer holidays.
  • 124 days of annual holidays (previous year results).

Qualification Requirements

  • Those who resonate with the company's values and mission.
  • Those who are motivated to learn.
  • Educational background is not required.
  • More than 2 years of programming experience.

Preferred Skills

  • React, Vue.js, Laravel, Python, JavaScript, TypeScript, AWS, GCP
  • Those with a strong passion for exploring new technologies.
  • Those with experience in upstream process design.
  • English communication skills.

Employment Status

Contract (fixed terms)/Permanent Employee.
※ Negotiable

Welfare

  • There is a qualification acquisition incentive (up to JPY 100,000/Year).
  • Various Insurance (health, social insurance, accident insurance, and retirement insurance).
  • English Conversation Classes.
  • Club Activity.
  • Books purchase support.
  • English conversation lunch.
  • Stock option system

Number of Members

40 People (Japan and Indonesia).

Location

  • Sendai, Miyagi
  • Chofu, Tokyo
  • Bali, Indonesia

Working Hours

  • Japan 9:00~18:00 JST
  • Indonesia 8:00〜17:00 JST

Others

  • For those who are interested, we also have overseas business trips to Bali, Indonesia. Let's enjoy traveling abroad together!
  • Development environment: GitHub, Slack, Claude Code Max, AWS/GCP, CI/CD. Using an AI-powered structured development flow, quality checks across all stages are automated.
  • We value each person regardless of race, appearance, or religion.
  • Dress code, hairstyle, and name are all free.

Other Open Positions

FAQ

FAQ

Q

Tell me about Grune AI Technologies's personnel evaluations.

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Q

What is the average age of the employees?

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Is there any rules of what to wear at the office?

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Will transportation be paid?

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Can I work from Indonesia (Bali)?

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Q

What is the minimum score of TOEIC?

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When do I need to use English?

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Is there any projects that required working in the customer office?

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What is the average amount of overtime hours?

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Will I be able to participate in the projects I want to work on?

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Can I be issued a work VISA to work in Japan?

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Can I choose to work from home or come to the office?

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Q

What is the business you are focusing on the most right now?

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Q

Can I have a side job?

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Inquiry Form

    Name

    Required

    Email Address

    Required

    Inquiry

    Other

    Other Posisitons

    Casual Interview
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