I help startups, agencies, and growing companies design the right tech stack, build strong engineering teams, and ship scalable, AI-ready products — without the cost of a full-time CTO.
Let’s TalkYou have a product vision but need senior technical leadership to make the right decisions early, build an MVP, and scale without rewrites.
You need CTO-level expertise to architect platforms, integrations, and advanced interactive experiences for your clients.
Your product is live, but tech debt or scaling issues are slowing you down. I help stabilize and lead your tech forward.
Strategic and hands-on technical leadership aligned with business goals.
Scalable platform architecture from MVP to growth.
Hiring, mentoring, and engineering workflows.
AI-powered features, document intelligence, and automation.
Secure APIs and third-party integrations.
Enterprise authentication and authorization systems.
Cloud infrastructure, CI/CD, performance, and security.
I bring 25+ years of experience building and shipping real products across SaaS, AI-powered platforms, immersive systems, advertising technology, and interactive applications.
I’ve served as CTO and technical lead for platforms used by enterprise clients including Comcast, ADT, and Dell — while remaining hands-on with code and teams.
I bridge engineering, design, and business to turn vision into scalable, production-ready systems.
If you need senior technical leadership to build, scale, or fix your technology, let’s talk.
Email:
rexcartagena@gmail.com
LinkedIn:
linkedin.com/in/rex-cartagena-65972527