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 caliber 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. 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.

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. Select the technology stack, architecture patterns, platform roadmap, engineering standards, and foundational technical decisions required to support long term scalability, security, performance, and maintainability.



Architect and contribute to foundational services including APIs, authentication, API gateways, shared services, integration layers, unified data structures, microservices, and cloud infrastructure.

Lead AI native engineering: Establish agentic engineering workflows, AI assisted development practices, automated review and testing loops, CI/CD, infrastructure as code, and the tooling required to accelerate high quality delivery. Design reliable integration frameworks across CRM, ERP, billing, payments, subscriptions, accounting, and other business critical systems such as Salesforce, NetSuite, Zuora, and Yuno.

Build and lead a lean senior team: Hire, mentor, and sequence a small group of high autonomy engineers who can own architecture, implementation, testing, deployment, and delivery with limited traditional PM or QA support.

Own technology and vendor decisions: Evaluate AI services, cloud platforms, engineering frameworks, developer tools, and technical vendors with a focus on capability, cost efficiency, scalability, and long term fit. Hands on senior technical leadership experience, ideally as a CTO, Technical Architect, VP Engineering, Head of Engineering, Founding Engineer, first technical hire,



or similar role. Proven experience designing and shipping scalable production software in lean, fast moving, or ambiguous environments.

Experience owning greenfield platform architecture, including technology stack selection, architectural standards, shared services, APIs, integrations, distributed systems, or microservices. Strong cloud architecture experience, preferably AWS, with practical experience across modern infrastructure, DevOps, CI/CD, infrastructure as code, automated testing, deployment automation, and release quality.

Experience integrating enterprise systems across areas such as CRM, ERP, accounting, billing, subscriptions, payments, or other business critical workflows. Ability to personally contribute to foundational software development while leading architecture, technical reviews, and engineering execution.

Experience hiring, mentoring, and leading senior engineers in a high autonomy environment. Professional fluency in English; Spanish proficiency required, ideally conversational or intermediate.

Experience with EdTech, LMS platforms, online learning, consumer education, or digital learning products.

Experience developing unified platforms that support multiple products, brands, user segments, or geographies. Evidence of a strong builder mindset through personal projects, open source contributions, AI experimentation, or visible technical craftsmanship. GCP or Azure experience may be considered if supported by strong cloud architecture fundamentals.

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