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Gabriel J. Pérez Irizarry

Fractional CTO

Boricua pa' que tu lo sepas
Proficiencies
Shipping 50+ Apps
Architecture 8+ Companies
Speed 3-Day MVP
Strategy GA Tech MSCS
Grit 15+ Years
Leadership fCTO → Exit
Loadout
⚔ Weapon Python + Django ★ Legendary ✧
🛡 Armor AI Agents & Tooling ★ Epic
⊕ Relic 15 Years of Scars ★ Epic
◇ Trinket Coffee (Bottomless) ★ Legendary ✧
My Journey

15+ years building software, 50+ production apps. I run Nexrizen, where we build custom software and AI solutions for entrepreneurs and service firms. Outside of client work, I founded Indie Hackers PR to connect independent entrepreneurs in Puerto Rico, and I built Koipun early into my Japanese learning journey to help others pick up the language (I've since passed the JLPT N2).

What I Do Best

I plug into dev teams and set up AI agents that actually write features and catch bugs in review. Your team stays the same size, your backlog doesn't. 改善 (kaizen) for your codebase.

Outside the Terminal

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What Others Say

mIRC — #what-others-say
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Topic: What clients and collaborators say about working with Gabe
09:31
Arvin Saenz
<ArvinS> Gabriel is an exceptional collaborator and an invaluable brainstorming partner. Gabriel and his team have achieved remarkable success for my office. Their innovative approach to artificial intelligence and their deep understanding of our unique position as an immigration law firm have proven highly effective. I wholeheartedly recommend Gabriel and his team.
Arvin Saenz · CEO, Saenz-Garcia Law
09:33
Megan Fister
<MeganF> I'm thrilled to recommend Gabriel as an outstanding fractional CTO. Gabriel's rare mix of technical skill and business insight consistently delivers success. He's a joy to work with, fostering a positive team environment, and his diverse expertise in podcasting, web development, app creation, and business analytics is a game-changer. Any organization would be lucky to have him.
Megan Fister · Co-Founder, Listen Network
09:36
Ashley Keith
<AshleyK> Gabriel has been an incredible asset to CityRow. He is a skilled engineer with a strategic, entrepreneurial mindset. He is creative, nimble and, as a founder himself, is a leader who understands how to align tech with business goals. Having Gabriel's level of talent on a fractional basis has been an absolute game changer for us.
Ashley Keith · Co-Founder + Chief Brand Officer @ CITYROW
09:38
Helaine Knapp
<HelaineK> I worked with Gabriel several times over the past five years and cannot recommend him enough. So much so that I've hired him multiple times to lead and develop. He's smart, trustworthy and a great partner in thinking creatively not just about technology solutions - but how they match to business decisions.
Helaine Knapp · Founder & CEO @ CITYROW

What I Build With

Portfolio

Explorer — Projects
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CITYROW
Fractional CTO 2022 — 2024

Led technical strategy as Fractional CTO at CITYROW, contributing to their successful acquisition by WaterRower. Provided strategic leadership in digital fitness platform optimization, product innovation, and cross-functional team alignment, earning recognition from the CEO as "an absolute game changer" for the organization.

  • ✓ Aligned technology roadmap with post-Series A growth objectives
  • ✓ Optimized digital platform serving thousands of subscribers
  • ✓ Led technical innovation in connected fitness hardware integration
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