Code Story: Insights from Startup Tech Leaders - S11 E28: Hojjat Jafarpour, DeltaStream

Hojjat Jafarpour lives with his family in California. He got his PhD in databases and data streaming, back when the landscape was different and data streaming wasn't "cool" yet. He was an early member at Confluent, but also spent time at Quantcast, Informatica, and NEC Labs. Outside of tech, he has a family with young kids. He enjoys traveling, and can't wait until the kids are old enough to take on big trips.

Hojjat joined Confluent in their early days. He was on a project that built out kSQL, which was a key cornerstone of Confluent. As these were the early days of stream processing, he started to think about ways to make it easier - to make this sort of tech available without all the infrastructure.

This is the creation story of DeltaStream.

Sponsors

Links



Our Sponsors:
* Check out Incogni: https://incogni.com/codestory
* Check out NordProtect: https://nordprotect.com/codestory


Support this podcast at — https://redcircle.com/code-story-insights-from-startup-tech-leaders/donations

Advertising Inquiries: https://redcircle.com/brands

Privacy & Opt-Out: https://redcircle.com/privacy

Marketplace All-in-One - 3D printing was supposed to disrupt prosthetic costs. It hasn’t.

Prosthetic limbs can be expensive, costing thousands to hundreds of thousands of dollars. So the industry seemed ripe for disruption when 3D printing came along. The technology requires little labor and uses economical materials. But the reality of 3D printing prosthetic limbs isn’t that straightforward, according to writer and University of California, Berkeley, lecturer Britt Young, who uses a prosthetic arm.


Marketplace’s Meghan McCarty Carino spoke with Young about why 3D printing has yet to bring down prosthesis costs.

Headlines From The Times - Paramount Stages Hostile Bid for Warner Bros., Trump Announces $12B Farm Aid, Immigration Crackdown Widens, Supreme Court Weighs FTC Powers, Zelensky Meets EU Leaders, Death of Farming Tycoon’s Wife Probed, Vincent Thomas Bridge Plan Rejected, and More

Paramount is staging a hostile bid for Warner Bros. Discovery. Meanwhile, the Trump administration halted immigration applications for people from over 30 countries last week, following the shooting of two National Guard soldiers in Washington, D.C. Also, the Supreme Court heard arguments in a case that could expand President Trump's control over independent federal agencies. Across the pond, Ukrainian President Volodymyr Zelenskyy met in London with European allies. And the investigation into Kerri Ann Abatti's death continues. She was part of one of the most influential farming families in Southern California's Imperial Valley. In business, a Google-backed film by Michael Keaton is aiming to change the narrative on AI, and the California State Transportation Agency rejected plans to raise the height of the Port of Los Angeles Vincent Thomas Bridge as re-decking on the overpass begins.

WSJ Minute Briefing - Trump Says U.S. Will Allow Nvidia H200 Chip Sales to China

Plus: Ford engages France’s Renault to bolster its European lineup and combat Chinese competition. And Jamie Dimon is launching a $1.5 trillion initiative aimed at bolstering American self-sufficiency in critical industries - including rare earths and AI. Luke Vargas hosts.


Sign up for WSJ’s free What’s News newsletter.

Learn more about your ad choices. Visit megaphone.fm/adchoices

Up First from NPR - Trump Defends Affordability, SCOTUS & Presidential Power, Indiana Redistricting

President Trump heads to Pennsylvania to defend his record on affordability as polls show voters increasingly blame his policies for high prices.
The Supreme Court appears poised to grant presidents far greater power over independent agencies, signaling a major shift in how the federal government operates.
And Indiana lawmakers move toward a congressional map that could eliminate the state’s last two Democratic seats, intensifying a nationwide battle over mid-cycle redistricting.

Want more comprehensive analysis of the most important news of the day, plus a little fun? Subscribe to the Up First newsletter.

Today’s episode of Up First was edited by Rebekah Metzler, Krishnadev Calamur, Kelsey Snell, Mohamad ElBardicy and Alice Woelfle.

It was produced by Kaity Kline, Nia Dumas and Christopher Thomas.

We get engineering support from Stacey Abbott. And our technical director is Carleigh Strange.

And our Senior Supervising Producer is Vince Pearson.

Learn more about sponsor message choices: podcastchoices.com/adchoices

NPR Privacy Policy

WSJ What’s News - Trump Lets Nvidia Sell More Chips to China

A.M. Edition for Dec. 9. Nvidia shares jumped off-hours after President Trump approved the sale of its high-performance H200 chips to China. WSJ Asia business editor Peter Landers, says it's a boon for the AI-trade, following the recent selloff. Plus, WSJ’s Jonathan Cheng and Tom Fairless explain how China’s booming manufacturing sector is crushing Europe’s core businesses and driving Germany and France to consider tariffs of their own. And we look at the bellwether stakes of Miami’s mayoral race. Luke Vargas hosts.


Sign up for the WSJ’s free What’s News newsletter.

Learn more about your ad choices. Visit megaphone.fm/adchoices

The Daily - Netflix vs. Paramount: Inside the Epic Battle Over Warner Brothers

Netflix announced plans on Friday to acquire Warner Bros. Discovery’s studio and streaming business, in a deal that would send shock waves through Hollywood.

On Monday, Paramount made a hostile bid for the studio, arguing that the Netflix deal would be “anti-competitive.”

The Times journalists Nicole Sperling, Kyle Buchanan and Lauren Hirsch discuss what it all means for the future of TV and film.

Guest:

  • Nicole Sperling, a New York Times reporter in Los Angeles who covers Hollywood and the streaming revolution.
  • Kyle Buchanan, a pop culture reporter and the awards-season columnist for The New York Times.
  • Lauren Hirsch, a New York Times reporter who covers the biggest stories on Wall Street, including mergers and acquisitions.

Background reading: 

Photo: Aleksey Kondratyev for The New York Times

For more information on today’s episode, visit nytimes.com/thedaily. Transcripts of each episode will be made available by the next workday. 

Subscribe today at nytimes.com/podcasts or on Apple Podcasts and Spotify. You can also subscribe via your favorite podcast app here https://www.nytimes.com/activate-access/audio?source=podcatcher. For more podcasts and narrated articles, download The New York Times app at nytimes.com/app.

Start Here - SCOTUS Considers: Who Can the President Fire?

The Supreme Court signals it’s open to overturning a century-old precedent on presidential powers. Paramount attempts a hostile takeover of Warner Brothers Discovery, interrupting a potential merger with Netflix. And prosecutors reveal handwritten notes outlining what they claim were Luigi Mangione’s escape plans after allegedly murdering a CEO.

Learn more about your ad choices. Visit podcastchoices.com/adchoices

Honestly with Bari Weiss - Should We Legalize Assisted Suicide?

One of the most complex medical, ethical, moral, and religious questions of our era is that of physician-assisted suicide—also known as Medical Aid in Dying, or MAID.

Eleven U.S. states and Washington, D.C. have legalized some form of MAID for terminally ill patients. And New York might join them.

Over the summer, a Medical Aid in Dying Act passed New York’s state legislature. It is now sitting on Governor Kathy Hochul’s desk as she decides whether to sign it into law.

Under the proposed New York bill, terminally ill adults with a prognosis of six months or less to live would be able to access a prescribed, self-administered life-ending medication.

Supporters argue that this is a compassionate option—one that can relieve people of immense pain and suffering, allowing patients to choose when and where they die, and to do so surrounded by loved ones.

Opponents see this as a violation of physicians’ fundamental oath to do no harm. They also worry that while access may begin narrowly, it could expand over time to include people seeking death for reasons other than terminal illness—such as mental suffering or simply a desire to stop living. Cases like this have already occurred in Belgium, the Netherlands, Canada, and Switzerland.

Rafaela Siewert sat down with two experts who see this topic very differently for a heated debate.

David Hoffman is a healthcare attorney, clinical ethicist, and professor of bioethics at Columbia University. He argues that hypothetical future abuses of MAID shouldn’t outweigh the needs of terminal patients who need this option now.

Dr. Lydia Dugdale is a physician, medical ethicist, and professor of medicine at Columbia University. In her view, legalizing this practice of physician-assisted suicide risks undermining the responsibilities of governments, medical systems, and families to care for the mentally ill, the poor, and the physically disabled. And she fears that the potential for excessively expanded access over time is too great.

We are among the many Americans who do not know what the right answer is. We see both sides—which is why grappling with the nuances of this subject is so important.

This is a debate you won’t want to miss.


Learn more about your ad choices. Visit megaphone.fm/adchoices

The Daily Detail - The Daily Detail for 12.9.25

Alabama

  • Trump  praises Governor for getting illegal alien truck drivers off roadways
  • Attorney says PSC has hidden tax that Alabamians need to know about
  • Islamic Academy of AL withdraws re-zoning application from Hoover
  • Leftist groups joining with Read Freely AL in opposing APLS policy change
  • Sting operation in Decatur lands 7 people behind bars for seeking minors
  • Work begins for upgrading Port of Mobile cargo terminal Pier B south

National

  • NJ US attorney Alina Habba submits resignation after ruling on her position
  • Trump offers $12B bailout to famers due to affects of tariffs, threatens more tariffs on Mexico over water treaty violation
  • Tom Homan says US visas given to Somali immigrants now under scrutiny
  • State of Maine has allowed a Somali owned company to defraud services
  • State lawmaker in MN calls on FBI and DOJ to arrest Ilhan Omar for serial criminal activity
  • Chinese scientists use gene editing to make fungi taste more like chicken