johnny.io

Johnny McCartin

Technical Partner · Fractional CTO

Technology leadership. Built around your business.

I partner with established businesses to simplify operations, develop better systems, and make technology a meaningful part of their growth.

Schedule a 20-Minute Conversation

I've spent 14 years building businesses, developing software, and leading technology initiatives. From founding XeRo Media to nine years as a CTO and working on large-scale infrastructure development, my experience brings together business strategy, product thinking, and hands-on execution.

01Who's a great fit

Businesses that have established themselves and are ready to make more intentional use of technology.

Stage	Established operations with growing complexity, evolving needs, or systems that haven't kept pace.
Situation	Technology decisions lack clear ownership, existing systems create friction, or internal teams need additional strategic direction.
Mindset	Wants a long-term partner, not a vendor who builds and leaves.
Investment	Ready to invest in senior technology leadership on an ongoing basis.

My focus is on established businesses and ongoing partnerships rather than early-stage startups or isolated projects.

02How I help

I start by understanding how your business operates, where technology can make a difference, and what's worth prioritizing. From systems integration and automation to custom software and technical strategy, I focus on practical solutions that create lasting value.

Start

Technical Partner

We begin with a monthly retainer. I learn your business, identify priorities, and provide the technical leadership and execution to move forward.

As We Grow

Fractional CTO

As our relationship develops, I can take on broader technology leadership and strategic responsibilities, including equity participation where appropriate.

03Why work with me

Exclusive

I work with no more than four businesses at a time. This allows me to stay personally involved, understand each business in depth, and maintain continuity.

Proven Experience

My background spans entrepreneurship, software development, technology leadership, and business strategy. Today, I bring that experience to long-term technical partnerships.

04Next step

A 20-minute call. I'll tell you honestly whether I can help.

Book the call