Technical Cofounder / Founding CTO

Location: New York, NY, USA

Time: Full-time

Stage: Early-Stage with Traction: Product live, pilots in development, accelerator backing, fundraising in progress

Compensation: Meaningful cofounder-level equity + long-term upside

About Us

Closai is the purchase history context layer for commerce. Our proprietary 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.

We have a consumer app live, accelerator backing and B2B pilots in development.

About the Role

We’re looking for a Technical Cofounder/ 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.

What You’ll Own:

  • 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

Technical Skills:

  • Backend & Infrastructure - Python (preferred) or Node.js - REST and/or GraphQL APIs - PostgreSQL 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-facing products - Performance, reliability, and security mindset - Strong intuition for user experience (DX) - Enterprise

How to Apply:

  • Email us at contact@closai.io

  • Tell us more about yourself and your interest in the role

  • Share your resume and Linkedin profile