Early stage venture capital firm Newark Venture Partners hosted a Demo Day on Tuesday at the Newark Museum, showcasing start-up technology companies.

Founders of technology companies said these corporations bring high-paying jobs to New Jersey.

Newark Venture Partners has invested $15 million in 54 technology companies that employ a total of 400 employees.

Don Katz, founder of both technology company Audible and Newark Venture Partners, said that “technology companies have had access to the incredible domain expertise of Audible employees and our corporate partners.”

“I’m excited to see how this class of amazing companies contributes to our efforts to tether Newark to the elements of the economy that are creating jobs and taxable revenue and that validates the profound business case for this city.”

Colin Newman from Audible said he is thrilled by how quickly Audible has grown since it moved to Newark 10 years ago.

“Audible created podcasts before that word existed,” Newman said. “Our innovation goes beyond our four walls.”

Audible gives $500 per month to its employees to live in Newark, Newman said. This is an effort to get employees to spend money at Newark restaurants and other Newark businesses, he said.

Dwaine Maltais, a co-founder of human resources analytics company Talentegy, said that more than 50 percent of applicants will end a business relationship with a company due to a poor experience and more than 50 percent of people will abandon an application process because of a technical problem.

Preston Faykus, founder of voice analytics company RankMiner, said his company helps to reduce companies from spending money unnecessarily through employees leaving companies.

“Our purpose is to reveal speaker intent and predict future actions,” Faykus said.

Joe Scott, executive vice president in the Office of Health Care Transformation at RWJBarnabas Health, called health care difficult to understand. His employer is making health care easier to understand through artificial intelligence.

Rachna Dhamija, a co-founder of artificial intelligence health care company Ejenta, said her company helps people who receive medical care. Ejenta gathers data from wearable devices and from electronic medical records to create artificial intelligence-driven analytics that help health care providers to detect and predict which patients need care.

Eva Sadej, a founder of Floss Bar, brings dentists to people. She said that her company is making in-office dental care by eliminating inconveniences of waiting and traveling.