LESLEY JOHN Jumbo.
I engineer systems that work: from circuits to software to climate infrastructure. Twenty-one years old, five years in, building the quiet infrastructure behind hardware, products, and forests.
Selected Work.
03 projects
Reforest AI →
Revenue protection infrastructure for forest-backed carbon assets. Selected out of 2,700+ entries from 96 countries.
Hi-Wear →
Smart footwear with embedded sensors for step counting, weight measurement, GPS tracking, and gait analysis.
This Portfolio →
The site you're on right now. Japanese-minimal aesthetics and scroll-driven interactions.
Air Clicks →
Gesture-controlled wearable input device for presenters and accessibility.
WaveFlush →
Hands-free toilet flushing with ultrasonic and infrared sensors.
Techiehive →
EdTech platform for tech skills development across Africa.
Preama →
Creative studio site for a multidisciplinary brand across food, film, and craft.
Placebo →
A calm, considered site designed and built for the Placebo brand.
Oxbridge Knights →
A credible, content-led site designed and built for Oxbridge Knights.
Simpa Samson →
A personal site designed and built for Simpa Samson.
The Gram →
A fast, image-forward site designed and built for The Gram.
JAD →
A motion graphics piece I designed and animated.
Zen Academy Coming Soon
A new venture, currently in development.
I build quietly,
and I build to last.
I started building with microcontrollers in 2021. Since then, I've won three hackathons, earned Top Honors in the National Geographic Society Slingshot Challenge out of 2,700+ entries across 96 countries, spoken at TEDx twice, and built Reforest AI; a Climate Tech startup protecting forest-backed carbon assets.
My work sits at the intersection of low-level engineering and product thinking: firmware that survives the field, software that respects the user, and ventures that serve the environment they exist in.
How I build.
A working engineer's stack, not a logo wall. These are the tools I reach for, in the order I reach for them.
Reforest AI.
Protecting forest-backed carbon.
Revenue protection infrastructure for forest-backed carbon assets. We target REDD+ carbon project developers whose revenue depends on preserved forest: catching deforestation events, reversals, and fraud risk before they erase years of credits.
Say hello. I read everything.
Open to embedded systems contracts, software projects, and conversations about climate tech.