Guehi And Co. is a software development agency founded in New York. We pair senior engineers with strong technical leadership — so projects ship on time, without the usual chaos.
Companies were handing projects to offshore teams and getting back code that technically ran but nobody could maintain. Or they were paying agency rates for developers who'd never shipped anything real.
We'd both worked inside those situations — as engineers, as technical leads. We knew what the gap looked like from the inside.
Guehi And Co. was built to close it. We vet engineers in the top 1% of their field and pair them with technical leadership that stays hands-on throughout the project — not just at kickoff.
The result is software that gets built right the first time. Not software that needs six months of firefighting after go-live.
Year Founded
New York, NY
Most projects fail in the planning phase — not the build. Here's how we prevent that.
We spend the first conversation understanding your business, not pitching ours. What's the actual problem? Who's affected? What does success look like? We won't write a proposal until we can answer those.
We document requirements, map the architecture, and break the build into phases. You get a clear timeline and cost estimate — not a vague range — before any work starts.
Engineers build in two-week sprints. You see working software, not status reports. Every sprint ends with a demo, a review, and a clear picture of what's next.
Every feature goes through functional, performance, and security testing before it ships. We catch problems before your users do.
We manage deployment, monitor performance post-launch, and stay on for ongoing support. Most clients keep us on retainer — not because they have to, but because it works.
What makes working with us different
We don't staff projects with juniors and bill them as seniors. Every engineer on your project has shipped production software at scale.
John and the leads don't disappear after kickoff. They review code, make architectural decisions, and stay accountable throughout.
ou see what's being built, what's been tested, and what's coming next. Weekly written updates. No surprises on delivery day.
Source code, documentation, infrastructure — it's yours on day one of delivery. We don't hold IP hostage or build in lock-in.
The visionaries steering the ship and ensuring technical excellence across every project.
Founder & CEO
John co-founded Guehi And Co. after a decade building software for fintech and logistics companies. He leads client relationships and sets technical direction across every project.
Co-Founder
John Guehi built his first product at 19 and has been shipping software ever since. He oversees engineering delivery and holds the team to the standards he'd hold himself to.
CTO
Roger manages the infrastructure and security layer across all client projects. If something breaks at 2am, Fu's the one who already knows about it.
