Fractional Technical Co-Founder for Startups

The Problem

You have the domain expertise. You have the customer relationships. You may even have early revenue or a term sheet. What you do not have is someone who can turn your product vision into a working application — someone who knows which database to pick, how to structure the API, and what not to build in the first version. Every conversation with a dev shop ends with a six-figure quote and a contract that does not start for six weeks. Every conversation with a potential technical co-founder ends with “I love the idea, but I need a salary.”

You have tried outsourcing. The agency built something that sort of works, but every change takes two weeks and costs five thousand dollars. The codebase is a black box — you cannot hire someone to take it over because nobody wants to inherit an agency’s code. You are running out of runway and you are not getting closer to a product you can sell.

What you need is not another advisor. You need someone on the founding team who can build the thing, make technical decisions with conviction, and stay long enough to hire and train the people who will replace them. Someone who treats your burn rate like their own because, in a very real sense, it is.

Why This Is Hard

The fractional CTO market is crowded with people who have never been the first engineer at a startup. They have impressive resumes — Fortune 500 VP of Engineering, technical advisor to multiple startups — but they have never built a product from zero, never sat in a fundraising meeting explaining their architecture to a skeptical investor, never been the person who gets paged at 3 AM because production is down and there is nobody else to fix it. Strategy without execution experience is expensive opinion.

On the other side, freelance developers can execute but lack the strategic judgment that comes from founder-level accountability. They build what you ask for, not what you need. They optimize for billable hours, not for product speed. They leave when the contract ends and take the mental model of the codebase with them. Neither the pure strategist nor the pure executor solves the core problem: you need someone who does both and stays accountable for outcomes.

Then there is the hiring trap. Many founders bring on a fractional CTO or technical advisor who helps them hire the first engineering team — but that person has never hired engineers at a five-person startup. Hiring at a startup is fundamentally different from hiring at a large company. You are not looking for specialists who excel in a narrow domain. You are looking for generalists who can ship across the stack, tolerate ambiguity, and not quit when the roadmap changes three times in a quarter. If your technical co-founder has never made those hires, they will make expensive mistakes with your money.

How We Approach It

We join your founding team as a working technical co-founder — not an advisor, not a consultant, not a dev shop. We write the initial codebase. We set up the infrastructure. We design the architecture. We make every early technical decision as if it were our company, because our compensation is structured to make that true. When it is time to hire, we write the job descriptions, screen candidates, conduct technical interviews, and onboard the first engineers.

The engagement is designed to end. From day one, we are building toward a handoff — documenting the architecture, codifying the engineering process, training the team to operate independently. When you are ready for a full-time CTO or VP of Engineering, we help you hire that person and run a structured transition. We do not cling to the engagement. A clean exit is a success metric.

Our background matters here. Matthew Mihok was the first engineer at two companies — two separate companies, two separate acquisitions. He built both products from scratch, scaled both engineering functions, and took both through technical diligence and post-acquisition integration. He is an Antler Founder Residency alum, which means he has been through the zero-to-one founder journey and understands what it feels like to be in your seat. He advises CTOs at small-to-mid-size companies. This is not a career transition into advising. This is what he does, and he stays in the code. The person who scopes the problem is the person who writes the code and stays until it is running. No junior bench. No handoffs.

Proof

A pre-seed fintech founder came to Mihok Fieldworks with a validated problem, a pitch deck, and six weeks of cash to get to a working product. The founder had domain expertise but no engineering background — they had been quoted $80,000 and 4 months by an agency.

We built the core transaction engine in six weeks: a multi-tenant architecture on a managed database, a REST API with token-based auth, and a minimal web dashboard. The architecture was deliberately simple — a single deployable with clear seams where services would split later — because the goal was to get real users, not to future-proof for scale that did not exist yet.

The founder demoed to investors at week 7 with real transaction data from beta users. They closed their seed round at a valuation 2x what they had projected, citing the working product as the difference between a deck and a business.

A different pattern: a mid-stage company with 25 engineers had hired a CTO from a FAANG company who was excellent at managing scaled teams but had never been the sole engineer responsible for a product. The team was building infrastructure nobody needed because nobody in the room had felt the pressure of “ship something that works by Friday or the company runs out of money.”

We worked alongside that CTO for three months, not to replace them but to add a different register to the room. The lens shifted from “what does a 200-person engineering org need” to “what does this 25-person team need to ship next week.” Within the first quarter, the team shipped two features that had been in planning for six months. The CTO stayed and thrived; the advisor was there to calibrate, not to take over.