JBDEJESUZ / IRELAND
Software engineer. Product builder.
I build products people actually use.
Right now I’m building Dirt. Making land development data something you can actually act on.
Mentorship, fractional CTO work, and product partnerships.
Ireland or remote, alongside my work at Dirt.
01 / SELECTED WORK
01FOUNDING ENGINEER · MAIN QUEST
I’m a founding engineer at Dirt, building software that helps US land developers decide which sites to pursue and what they can build.
My workI’ve built AI research workflows, source-backed site data, deal briefs, and automated feasibility reports. My work connects backend services and background processing with the maps, tables, and tools developers use to evaluate a site.
02CTO WORK · TUTORING PLATFORM
I built the platform that runs the tutoring experience: booking lessons, taking payments, connecting tutors and students, and turning sessions into AI-assisted reports for parents. Originally TeachLoop.
My workLed architecture and hands-on engineering across the Expo app, Convex backend, video integrations, and Stripe Connect. Mentored engineers and coordinated delivery across six time zones.
V1 delivered in 11 weeks
03MY PRODUCT · SAAS FOUNDATION
I built Caylem as the foundation for my own products: a Bun and TypeScript monorepo with Next.js, Convex, authentication, billing, transactional email, and shared UI.
My workBuilt reusable storefronts and product components, with release and deployment automation. This website runs on Caylem’s simpler app and shared packages.
04FULL STACK ENGINEER → DELIVERY LEAD · 2022–2025
At OnLoop, I owned the R&D backend, built AI-powered WhatsApp agents, and helped move users to a new app. I grew from full-stack engineer into delivery lead while staying hands-on.
My workLed an intern team building an internal portal, built tools for customer success, and maintained automated App Store releases and cloud deployments with the wider engineering team.
05PRODUCT ENGINEERING · AI MOBILE APP
I built and launched CounterAI, taking the app from a meal photo to a food log with computer vision and generative AI.
My workBuilt the photo-based food logging experience and a goal-based body simulation feature, connecting AI capabilities to a mobile product people can use day to day.
OUTSIDE THE MAIN QUEST
PERSONAL / VOICE & MAPS
A map of voice messages from the people who love someone, brought together from cities around the world.
WEB & MOBILE / MARKET DATA
A scanner for comparing cryptocurrency prices and spreads across exchanges, on web and mobile.
RUGBY / PODCAST & TRIVIA
A South African rugby podcast with mates, plus a trivia app for quiz nights.
02 / WORK WITH ME
Bring the code, the decision you’re stuck on, or the product you want to build. We can work through it together.
About mentorshipTechnical direction with hands-on engineering. Product scope, architecture, code reviews, and getting a first release out.
About fractional CTO work03 / PARTNERSHIPS
For product development through my company, there’s Lyemac. For the foundation I build on, there’s Caylem, also at caylem.co.za.
