PALM BEACH GARDENS, Fla. — If there’s a standard checklist for startup success, Christopher Johncke has marked off all the important boxes.

Soaring sales? Check. His company, iFixYouri, saw revenue rise from $239,173 in 2010 to $2.2 million last year, an 800 percent jump that landed Johncke at No. 595 on this year’s Inc. 5000 list of the nation’s fastest-growing companies.

Cool concept? Check. iFixYouri repairs tablets and smartphones, placing Johncke in the middle of the hottest trend in consumer technology.

Slick vibe? Check. The iFixYouri space feels more like a sleek Apple store than a stereotypically cluttered repair shop.

Johncke’s Palm Beach Gardens, Florida-based company now has 10 stores in Florida and Massachusetts, and he plans to open more.

This success story was sparked by desperation. Johncke, 32, lost his job as an engineer during the 2007-09 recession and was unable to find another position.

During his fruitless job search, Johncke broke his iPhone. The repair bill would have been $300.

Unable to afford the fix while scraping by on unemployment checks, Johncke channeled his inner MacGyver. He scoured the Internet for cheap replacement parts and repaired the phone himself.

After Johncke fixed a phone for a friend, he realized he’d found a viable Plan B. He drummed up so much business with Craigslist ads that he decided to open a store.

Customers bring in a steady stream of devices with cracked glass or fried circuit boards. The typical repair bill is $80 to $130.

Johncke recently rented warehouse space to handle mail-in orders from around the country.

Johncke said his workers can’t always fix phones and tablets. If, for instance, someone drops a device in water and then tries to charge it while it’s wet, the phone’s probably shot. But he says iFixYouri usually hands back a revived device.

There’s no shortage of opportunity in the electronics-repair business. A similar company, uBreakiFix of Orlando, reported $26.5 million in sales last year. It ranked 197th on the Inc. 5000.

Johncke says the best way to stay out of his store is to buy an OtterBox or another sturdy case for your device. He recommends protecting the screen with a tempered glass guard, and keeping electronics away from water.

But so long as consumers keep buying — and breaking — fragile devices, Johncke expects business to grow.

“If Apple or Samsung or any manufacturer built things to last,” Johncke said, “they’d go out of business.”