Technical Cofounder​/CTO

Closai's open infrastructure connects personal purchase history to the retail ecosystem, enabling a new era of commerce. Our proprietary Closetization™ system understands what consumers already own and uses that intelligence to power personalized shopping, agentic commerce, and next-generation retail infrastructure. We operate at the intersection of AI, data infrastructure, and commerce. Closai is focused on revolutionizing the way individuals and businesses connect and utilize their assets.

Closai is an early-stage start-up with accelerator backing, pilots in development, and a live product. Check out the app here -

We’re looking for a full-time Technical Cofounder or Founding CTO to own Closai’s technical architecture end-to-end and help define the standard for order intelligence. This is a hands‑on role. You’ll architect, code, and ship alongside the founder, while shaping the long‑term technical vision of the company.

Meaningful cofounder-level equity and long‑term upside.

• Core backend architecture (APIs, data models, security)
• Purchase history intelligence pipelines (ingestion, normalization, enrichment)
• Universal infrastructure enabling third‑party integrations
• AI-powered search, recommendations, and agent workflow
• Scalability, reliability, and data privacy foundations
• Technical roadmap aligned with enterprise SaaS and platform monetization

• Backend & Infrastructure - Python (preferred) or Node.js - REST and/or Graph
  
  QL APIs - Postgre
  
  SQL or similar relational databases - Cloud infrastructure (AWS or GCP) - Authentication & authorization (OAuth, JWT, scoped access)
• Data & AI - ETL and data pipeline design - Experience with embeddings, vector databases, or semantic search - Working with LLMs or ML systems in production - Schema design for messy, real‑world data - Enterprise‑ready pipelines and APIs
• Product Engineering - Shipping consumer and enterprise‑facing products - Performance, reliability, and security mindset - Strong intuition for user experience (DX) - Enterprise

• Strong Analytical and Research skills to solve complex technical and strategic problems.
• Excellent Communication skills to collaborate with cross‑functional teams and stakeholders.
• Ability to lead and manage technical projects with attention to detail and deadlines.
• Strong adaptability and self‑motivation in a fast‑paced startup environment.
• Previous experience in a technical or cofounder/leadership role is a plus.
• Previous experience with commerce or retail is a plus.