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Cofounder/CTO (Equity)

Stealth Startup | San Francisco Bay Area, United States | Yesterday
full-time | on-site | executive
skills: full-stack development, mobile development, game development, backend development, technical strategy, product architecture, real-time gameplay, multiplayer systems, health wearable integration, AI models, unity, game engines

Company Description

SimFit Labs — a gamified fitness app and future health ecosystem where users exercise, compete, and stay motivated through real-time workout games and AI voice personalities. Visit: https://simfit.app/

This is a pre-seed stage startup with a working beta (app → gameplay loop), and now I’m looking for a technical cofounder to take this from 0→1 and scale it into a high-engagement consumer product.

What you’d own:

  • Code, Technical Strategy, Product architecture (mobile + backend)
  • Real-time gameplay + multiplayer systems
  • Health Wearable integrations (Apple Health, etc.)
  • AI-driven voice experiences

What you’ll be responsible for beyond code:

  • Shaping product direction and core engagement loops
  • Running fast build–test–iterate cycles to find product-market fit
  • Actively fundraising and pitching (investor conversations, technical vision, diligence)
  • Helping define company strategy alongside me

Who I’m looking for:

  • Startup experience, previous cofounder or CTO experience preferred
  • Strong full-stack / mobile and games builder with expertise in AI models
  • Experience in Unity and/or game engines
  • Has built and shipped real products and/or previous startup founder
  • Thinks in engagement, not just features
  • Excited about digital health, gaming, AI, or consumer apps
  • Wants to build something from the ground up

This is a true cofounder role (equity), competitive salary after fundraise

Benefits

equity · competitive salary after fundraise
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