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

Established businesses ready to make more intentional use of technology.

Size	$1.5M+ annual revenue, ideally 3+ years in business.
Situation	Owner-led, no in-house CTO, held back by manual work or outgrown tools.
Mindset	Wants a long-term partner, not a vendor who builds and leaves.
Budget	Ready to invest in senior leadership.

My focus is on established, revenue-generating businesses rather than early-stage ventures.

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