nappi.app
Founder and solo engineer for a baby sleep and activity tracker with SleepSense nap predictions, family sync, iOS, Android, Apple Watch, Wear OS, and multilingual support.
Nappi, Fintual, Amazon, Netflix
John Peebles
I build product systems where user experience, reliability, and business constraints all have to line up, from solo-founding nappi.app to fintech launch work, Amazon scale operations, and Netflix product engineering.
- nappi.app founder
- Netflix product engineering
- Amazon operational scale
- Fintual mobile app
nappi.appsolo-founded and solo-engineered baby sleep and activity tracker
Netflixconsumer product engineering at global entertainment scale
Amazonlarge-system ownership with operational rigor
FintualYC-backed fintech app foundations and launch-stage execution
Experience
Three very different scales of product engineering.
Nappi is the current founder arc, Fintual sharpened the startup-builder muscle, Amazon added operational discipline, and Netflix sits at the intersection of product taste and global consumer systems.
Netflix
Product engineering in a consumer environment where reliability, experimentation, polish, and cross-functional tradeoffs all have to survive real scale.
Amazon
Software engineering with operational ownership: clear interfaces, service health, delivery discipline, and systems that keep working under load.
Fintual
Helped build the mobile app for a YC-backed investment platform, translating regulated fintech product needs into shipped customer experience.
Selected work
A narrower story, with more signal.
No resume sprawl here. The current arc is founder-led product shipping, fintech product launch, Amazon-scale engineering habits, and Netflix-level product systems.
Founder and solo engineer
Building nappi.app end to end: a baby sleep and activity tracker with SleepSense nap predictions, family sync, watch apps, and multilingual support.
Visit nappi.appMobile investing experience
App work for a regulated, YC-backed fintech, where onboarding, clarity, trust, and execution speed all mattered at once.
Visit FintualOperationally accountable systems
Engineering in an environment that rewards simple contracts, measured reliability, incident readiness, and ownership after launch.
Consumer product craft at scale
Product engineering where small interface decisions ride on top of serious platform constraints, experimentation, and reliability demands.
Operating style
Product taste with engineering consequences.
The useful work often happens between disciplines: enough product sense to choose the right problem, enough engineering depth to make the solution hold.
Translate ambiguity
Turn fuzzy product direction into interfaces, milestones, and system boundaries that teams can actually execute.
Own the boring parts
Care about observability, failure modes, support paths, and the operational details that make software trustworthy.
Keep founder context
Use business constraints and customer reality as design inputs, from nappi.app's parent workflows to large-scale product systems.
Contact
For product, platform, and venture conversations.
The fastest path is email. The broader professional trail lives on LinkedIn, code-adjacent context is on GitHub, and the current founder work lives at nappi.app.