Open English is seeking a hands on CTO / Platform Architect to lead the greenfield buildout of a unified, AI native learning platform. This person will own the technical vision and architecture, consolidate multiple legacy platforms into one scalable ecosystem, establish the company’s AI native engineering strategy, and build a small, high calibre engineering team.

This is not a traditional migration or modernization project. Open English is replacing its existing technology stack and rebuilding its learning ecosystem from the ground up into a single platform supporting Open English Adult, Open English Junior, and Open Mundo.

Reporting directly to the CEO and partnering closely with executive leadership, this person will define the technology stack, make foundational architecture decisions, personally contribute to core platform development, hire senior engineers, and establish an agentic first engineering culture.

This is a highly technical leadership role for someone who can operate as both a builder and architect. The adecuado candidate should think like a technical founder,



remain actively involved in engineering, challenge assumptions, translate business objectives into technical strategy, and build a high autonomy organization capable of delivering quickly without sacrificing scalability, security, or quality.

Key Responsibilities:
- Own the greenfield platform architecture: Define and lead the buildout of a unified, AI native learning platform that consolidates Open English Adult, Open English Junior, and Open Mundo into one scalable ecosystem.
- Set the technical strategy: Select the technology stack, architecture patterns, platform roadmap, engineering standards, and foundational technical decisions required to support long term scalability, security, performance, and maintainability.
- Build core platform capabilities: Architect and contribute to foundational services including APIs, authentication, API gateways, shared services, integration layers, unifi

📌 CTO / Technical Architect: Lead AI-Native Greenfield Build for Global EdTech Leader - Medellín
🏢 OSI Engineering
📍 Medellín