Your Technical Co-Founder From Zero to Scale
You have the vision. You need a technical partner who builds with you — not for you. Def0x partners with non-technical founders to validate, build, and grow production-ready products through real user feedback, not assumptions.
Sound familiar?
“I have code from another developer and I don't know what I have.”
You need an honest audit before you spend another dollar. We review what exists, tell you what's worth keeping, and give you a clear plan forward.
System Audit →“I have an idea but no technical co-founder.”
You need someone who can turn a problem into a product — and stay with you after launch. We build production-ready MVPs with real auth, real payments, and real infrastructure.
MVP Development →“I need ongoing technical leadership but can't afford a full-time CTO.”
You need a fractional partner who owns the technical strategy. We handle architecture, engineering process, and vendor decisions alongside you as the business scales.
Fractional CTO →Lean Startup, Not Waterfall
We don't disappear into a 6-month build and hope it works. Every engagement follows the build-measure-learn loop — ship something real, get it in front of users, learn what's working, and iterate. Whether it's an audit, an MVP, or an ongoing partnership, the principle is the same: decisions based on evidence, not assumptions.
Build
Scope the smallest version that tests your riskiest assumption.
Measure
Ship it, get it in front of real users, and track what actually happens.
Learn
Use real data to decide what to build next — then repeat.
Three ways to work together
Every engagement is scoped to the problem. No packages, no one-size-fits-all.
System Audit
A structured assessment of your existing codebase, infrastructure, and third-party services. You get a prioritized backlog and a clear recommendation on what to do next.
Learn more →MVP Development
From zero to a production-ready product. Real authentication, real payments, real infrastructure — built iteratively with your input at every step.
Learn more →Fractional CTO
Ongoing technical leadership — architecture ownership, engineering process design, vendor decisions, and due diligence support as your business scales.
Learn more →Founders We've Worked With
Virtual Time Capsule
A platform for creating digital time capsules in autobiography, biography, and memoir formats — preserving stories and memories for future generations.
Visit Live Site“Robinson operates in a completely different league. Before writing a single line of code, he conducted a meticulous full system audit — understanding what we'd built, identifying critical gaps, and establishing a strategic foundation for our next phase. No other developer I've worked with has ever prioritized this. His work ethic is extraordinary, his technical depth is world-class, and what truly distinguishes him is his genuine care for the mission. Working with him doesn't feel transactional; it feels like true partnership. I trust him fully as both a builder and a partner.”
View2Health
A personalized weight loss visualization platform that helps users understand the impact of their choices by showing realistic future weight trajectories.
Visit Live Site“Working with Robinson was a significantly different experience than my past work with other developers. Robinson listened, understood our timeline, and delivered an MVP that completely changed how we deliver our product.”
Boss Controls
An IoT energy management platform that connects behind-the-meter devices to the cloud, providing commercial buildings with real-time energy measurement, predictive load management, and cybersecure device control through its Atmospheres® software.
Visit Live SiteNot sure what you need?
That's what the first call is for. Whether you're starting from scratch, inheriting a codebase, or looking for ongoing technical leadership — the discovery call is where we figure out what makes sense for your situation.
Schedule Your Discovery Call