Who builds
your project.
R5IoT is a small studio in Brentwood, California. You talk to the person who writes the code, from the first call to launch day.
You'll work with
Jonathan.
Jonathan Concepcion
Founder and lead engineer
I've been writing software for about 20 years. I started on web and mobile projects for companies like E*TRADE, Prudential, Guitar Center and HardwareZone, then went on to build a credit card app for OneMain Financial and privacy software at TrustArc.
I started R5IoT in 2026 so small businesses and founders could get that same level of work without a big agency bill. When you hire R5IoT, you work with me directly, from the first call to launch day and after.
E*TRADE
Prudential
Guitar Center
OneMain Financial
TrustArc
Bishop Fox
HardwareZone
Our founder's track record.
Before and alongside R5IoT, founder Jonathan Concepcion has led web, mobile and enterprise builds for some of the biggest names in finance, privacy and retail. Each piece was built at the company named, and is credited to them.
Showing 15 projects by our founder
How a project
works.
01
Discover
We figure out who it's for and the one thing the app has to get right.
02
Design
Flows, a design system and a clickable prototype before a line of production code.
03
Build
Weekly builds on real devices, tested end-to-end, with clean architecture you can own.
04
Ship
App Store and Play Store submission, privacy labels, screenshots and a launch site.
05
Grow
We watch how people use it and keep improving the parts that matter.
A small studio in
Brentwood, CA.
Jonathan started R5IoT in 2026 after years of building software for companies like E*TRADE, Prudential and OneMain Financial. We build websites and apps for small businesses and founders, and most clients stay with us after launch.
You get a working build to try every week and a quick update on what changed. The code is yours, written so another developer could pick it up later.
…
Brentwood,
California
Working with teams everywhere
7:00 am – 7:00 pm PT
2009
Jonathan's first big projects: HardwareZone, then Guitar Center and E*TRADE.
2012
The idea for R5IoT started.
2021
Built the BrightWay credit card app for OneMain Financial.
Q1 2026
R5IoT opened.
2026
Eight apps in one year: AI utilities, wellness, faith and games.
Have a project in mind?
Let's talk.
Tell us what you're building. We'll send back a rough plan and a price, usually within a day.