CTO / Cofounder

Company: Harmonyus
Location: Miami
Posted on: May 9, 2025

Job Description:

We're tackling humanity's oldest and most fundamental challenge: relationships.Over 40 years of research clearly shows that poor communication is the top predictor of relationship breakdowns, causing a staggering 68% of divorces and leading to devastating emotional, physical, mental, social, and financial consequences.The ripple effects are immense: workplace productivity losses exceed $359 billion annually, divorce reduces employee productivity by over 8% per year, and taxpayers shoulder a staggering $112 billion yearly from family breakdown.But the impact isn't limited to economics: our deteriorating relationships have also driven a loneliness epidemic, now impacting half of US adults and 73% of young adults, with health effects as devastating as smoking a pack a day. Ironically, instead of using technology to enhance real-world connections, we've turned to AI companions as substitutes, deepening our isolation rather than solving it.Enter Harmonyus...A science-backed, AI-powered relationship coach designed to strengthen real human connections. Our app acts like an impartial third party, providing real-time feedback and insightful analysis to transform conversations. Initially focused on couples, our platform will expand to address other interpersonal relationships: family dynamics, friendships, and workplace interactions. Our functional prototype is ready and now we need someone exceptional to scale it into the world's first AI-powered multi-party mediation platform.Your Role: Founding Engineer & CTOYou'll lead our tech strategy, fully own our stack, and innovate at the forefront of AI-powered communication coaching. If building impactful products, moving fast, and exploring cutting-edge AI excites you, this role is your perfect fit.Note: This is an exciting opportunity to join as a co-founder and earn a significant equity stake in the company. Initially, compensation will be equity-only, but a competitive salary will be provided after funding round.What You'll DoTech & Product Development

• Take complete ownership of our tech stack, including scaling, infrastructure, and DevOps (CI/CD, automated testing, monitoring, and deployment).
• Evolve our POC into polished, scalable products-including native mobile applications-that people love.
• Ensure robust security and privacy for our users' sensitive conversations.
• Build and lead a tech team, guiding hiring and mentorship as we grow.
• Explore integrations with complementary platforms, services, or hardware to accelerate growth and functionality.AI & Innovation
  • Build emotionally intelligent AI agents that provide real-time, context-aware communication feedback to help users navigate conversations.
  • Leverage RAG, fine-tuning, context window optimization, and prompt engineering to ensure insights feel deeply relevant and actionable.
  • Explore edge AI and privacy-focused solutions for secure, low-latency interactions.
  • Lay the groundwork for proprietary AI models as we scale.Our Current Stack
    • Frontend: Next.js + Apollo Client
    • Backend: NestJS, Fastify, Prisma ORM
    • Database: PostgreSQL
    • APIs: GraphQL
    • AI: Multiple integrationsYou Don't Need Every Skill, But Bring:
      • Experience in full-stack development with modern technologies.
      • Deep interest or expertise in AI, particularly in conversational agents, emotional intelligence, or contextual awareness.
      • Strong alignment with our mission to fundamentally improve human relationships through technology.Why Join Harmonyus?
        • Cofounder-level ownership: shape a high-potential startup from day one.
        • Meaningful work solving significant societal problems.
        • Complete flexibility: fully remote, autonomous work environment focused on outcomes.
        • Freedom to innovate, experiment, and define the technical future of our company.Interested?Forget formalities, just show us what you've built. Send a brief intro and your GitHub or portfolio link. Let's start solving the relationship crisis together.
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Keywords: Harmonyus, Miami Beach , CTO / Cofounder, IT / Software / Systems , Miami, Florida