Co-Founder / CTO

3週間前


Shibuya-ku, Tokyo Sales Done Right

CO-FOUNDER & CTO WANTED (Tokyo / Shibuya)

Building SABI — Japan's first AI companion for creative confidence

Hi, I'm Julio — Founder & CEO of
SABI
, based between London and Tokyo.

SABI is an AI companion designed to help creatives practice how to talk about their work, price it, and communicate their value —
safely, humanly, and without pressure
.

Think: a Tamagotchi-like presence meets AI practice, emotional intelligence, and creative growth.

We're building this
Japan-first
, with global ambition.

And now, we're looking for our
third co-founder
.

Where we are now (real momentum)

You're not joining an idea.

You're joining a company already in motion.

  • Selected by
    Founder Institute Japan
  • Actively raising
    Pre-Seed
  • Validated in London with 150+ creatives trained
  • Early pilots confirmed with creative companies in Japan.
  • Strategic partnerships in progress (AI simulations, strengths-based frameworks)
  • Supported by
    Shibuya Startup Support
  • Advisory support from senior Japan-based operators (tech & ecosystem)

Current founding team:

  • Founder & CEO
    (me) — vision, product direction, storytelling, partnerships
  • Co-Founder & CPO
    — product, UX, systems thinking
  • You
    — Co-Founder & CTO

Your Role — Co-Founder & CTO (Non-Negotiable)

We are looking for a
Japanese CTO
to join as an equal partner.

You must be:

  • Japanese
    (native cultural and language fluency is essential)
  • Strong in technology
    — architecture, integrations, AI systems
  • Ideally from
    gaming, interactive media, or simulation-heavy products
  • Comfortable building systems that feel
    alive, responsive, emotional

This matters because SABI is not a dashboard.

It's a
companion
.

What you'll own

  • Technical architecture of SABI
  • AI integrations (LLMs, simulations, personalization)
  • Systems that support emotion, pacing, and presence
  • Early MVP → scalable product
  • Hiring and shaping the future engineering team

You will help decide
how
SABI thinks, reacts, evolves.

Why this is different

This is not:

  • corporate sales software
  • productivity SaaS
  • performance pressure tools

This
is
:

  • human skill-building
  • confidence through safe practice
  • technology with empathy
  • a product that respects Japanese communication culture

If done right, SABI changes lives.

Compensation & Structure

  • Equity:
    meaningful co-founder stake (discussed openly, 5–10% range)
  • Salary:
    starts post-funding (target ¥9–12M/year for CTO)
  • Full transparency
  • Full alignment
  • Pre-Seed currently in progress

Location

  • Tokyo-based (Shibuya)
  • Hybrid / remote flexibility
  • Core team presence in Japan is essential

If this resonates

You don't need to be loud.

You don't need to be flashy.

You need to care about:

  • people
  • systems
  • craft
  • and building something that actually matters in Japan.

Send me a message.

Tell me who you are, what you've built, and
why SABI interests you
.

If there's alignment, we'll build this — properly.

Julio

Founder & CEO, SABI


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