I design the architecture, write the code for the first MVP and leave a small team that sustains it. Over 20 years building products from scratch and three years taking AI to production.
A working MVP in production in about 4 weeks.
I do not sell meeting hours. I sell architecture, code in production and the team that keeps it running.
When you have no technical leader
You have a product or traction, but nobody to decide what to build first, what to buy off the shelf and what to write by hand. I make those decisions with you, execute them and build the team that will sustain them.
When you already have a CTO and the pain is AI
Your team owns the product, but the agents, the RAG or the copilots never leave the demo. I plug into your CTO and take responsibility for AI that works in production, with metrics and costs you can defend.
Four common pains and what happened when it was my turn to solve them.
I have the idea and a small team
2
developers to reach production
PeruAutos went live with two developers. Turismoi started as an MVP that stayed in the market for a decade.
We grew and the platform cannot keep up
3.5 M
properties indexed in a single country
At GoJom (Y Combinator W22) I led eight developers across four countries. Entering Mexico forced us to rebuild indexing to sustain a market ten times larger.
I want AI that works, not a demo
40,000+
conversations resolved without humans
At TEDI the assistant has run in production for over a year, resolving more than 90 % of conversations. At ConstructAI I shipped multimodal RAG and an MCP copilot inside Revit.
I need someone part-time, not a full-time hire
2
companies have already worked with me this way
At Turismoi I kept the platform running as an independent consultant and helped hire the new team. At TEDI I was part-time Head of AI through 2025.
With AI I get more done per hour, so you buy outcomes and I manage the time. The hours are still written down, because without a cap part-time turns into availability.
Between 15 and 20 hours a week, with goals agreed in writing at the start of each month. Within that cap you decide what it goes to; it is decided upfront, not on the fly.
Includes
Not included
Three-month initial commitment, renewable, with 30 days' notice.
A written scope, a fixed price and milestone payments. The format for an MVP, an AI integration or a migration with a beginning and an end.
Includes
Not included
From four weeks.
Two weeks to review product, code, infrastructure and team, and come back with a findings report and a 90-day plan.
Includes
Not included
Credited against the first month if we continue on retainer.
Fees are discussed on the first call, based on scope and company stage.
Founders, clients and colleagues from the teams I worked with.
An excellent programmer with very good technical skills across different programming languages. A perfectionist in his work and very capable of handling work under pressure. The applications he developed during his time at e-Holding (www.adondevivir.com and www.peruautos.com, among others) are without a doubt the best proof of this. A very good person whom I do not hesitate to recommend. Thank you for everything, Willy!
Translated from Spanish
Thank you so much, William, for your work on this project. It started as an idea and you knew how to turn it into reality through your experience and advice. You handled every agreement in the Functional Specification I gave you with order and professionalism. Your work was A1. We will definitely work together again and I definitely recommend the rest of the community to work with you. In my professional life, the people who are organized, methodical, and go the “extra mile” in everything they do can be counted on one hand. You are without a doubt an excellent professional.
Translated from Spanish
It has truly been a pleasure to work with William. I have had the chance to talk with many people in the development sector and he is the clearest, most direct, and most focused person I have met in the field. The way he explains things so simply, writes clean code, quickly understands the need I had, and even goes beyond the deliverable made a big difference for me. HIGHLY RECOMMENDED for development projects.
Translated from Spanish
Willy is a leader with great empathy for the team he leads. He got us, as a team, to come together, keep good communication, support each other, and so meet the goals we had set. He is someone who is constantly teaching himself new technologies and is always willing to teach others. I learned a lot thanks to the resources he shared with us and his tips for improving as developers.
Translated from Spanish
Working with William has been a very good experience; he is pragmatic, very concerned about the quality of his work, and always meets delivery dates.
Translated from Spanish
