An Austin tech founder who was killed alongside his wife and two young children in a fiery Florida jet crash had just celebrated a major business milestone and was making plans for a live event Tuesday in what became his final LinkedIn post.

Adam Robinson, 45, his wife, Helen Sharp, 40, and their children, Emma, 4, and Charlie, 2, were among nine people killed Sunday when the Learjet 60 carrying them from Austin to North Eleuthera in the Bahamas plunged into a Palm Beach County neighborhood.

On the day of the crash, Robinson wrote that RB2B had reached $10 million in annual recurring revenue (ARR).

"RB2B is $10m ARR with 1 FTE," Robinson wrote. "MoltSets is almost $1m ARR."

Two months earlier, Robinson said RB2B was generating $9.5 million in annual recurring revenue and described reaching $10 million with a small team as "the promised land."

Robinson was CEO and co-founder of Adam and Helen were devoted parents, and Emma, 4, and Charlie, 2, were the light of their lives. Helen and Adam were the love affair that will last forever," the families said.

"Their warmth, generosity and gift for making people feel welcome touched so many lives. Their loss will be felt deeply by all those who loved them and who they loved in return."

Retention.com, RB2B and MoltSets also remembered Robinson as "a friend, a mentor and a bold, outspoken leader who lived life to the fullest."

"He cared deeply about the people around him and brought energy and conviction to everything he built," the companies said. "His loss is deeply felt across our team and the tech community, as we collectively mourn this significant loss."

The Learjet departed Austin-Bergstrom International Airport at about 10:37 a.m. Sunday with two crew members and seven passengers aboard.

The crew reported light clear ice and moderate turbulence at about 35,000 feet before requesting permission to climb to 37,000 feet. Less than 30 seconds after the request was approved, the crew reported they were descending and issued a mayday call.

Federal investigators said Monday that weather conditions are a major focus of the investigation and that there are indications the aircraft began breaking apart before impact.

The cause of the crash has not been determined.