Reletter
Artwork for Joe Reis

My rants on data, technology, and business

Platform
Substack
PricingOnly free issuesPublishesTwice weekly
Issues169Founded6 years agoLast Issue10 days ago
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Artwork for Joe Reis

Latest Issues

Booms, Busts, and Builders: Lessons from the High Plains of Wyoming

South Pass City, Wyoming

I spent the week in the mountains of Wyoming, a place near and dear to me since I grew up there. Apart from climbing in the mountains, one of my favorite things to do is running and walking around the desolate high...

10 days ago
17
3

Life Outside the Bay Area Bubble - Atoms, Bits, and the Resurgence of Detroit

A question that comes up almost everywhere I go is, “Do you actually need to live in the Bay Area to do meaningful work in AI, tech, and data?” If you’re building the next foundation model or trying to raise a mountain of capital, San Franc...

24 days ago
23
16

Notes From the Field: AI, Energy Shocks & the End of the Old Playbook (Spring 2026 Edition)

Touching grass, as they say. On a stroll in Parliament Hill, London UK. One of my favorite things to do on the road, especially after giving a talk, is get outside and wander aimlessly for several hours. A fun way to decompress and see thin...

a month ago
27
1

The Organizational State of Data Engineering

Hey everyone! I did three surveys so far in 2026, and 1,629 data professionals responded. One consistent theme: data engineering’s challenges are mostly organizational, and that’s the top bottleneck in data work.

In January, “leadership di...

a month ago
19
2

Why 90% of Data Teams Are Failing at Data Modeling

Earlier this week, I published the results of April’s Data Modeling Pulse Survey. I wrote up the full survey over at Practical Data Modeling. I also recorded a Freestyle Friday this morning while walking around Salt Lake City, unpacking the...

a month ago
37
6

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Authors

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  • Joe Reis

    Best Selling Co-author of Fundamentals of Data Engineering (O'Reilly) | Data Engineer and Architect | Recovering Data Scientist ™ | Speaker | Professor | Podcaster & content creator | DJ | Occasional athlete

  • Juan Sequeda

    I’m the Principal Data Strategist at ServiceNow, joining through the acquisition of data.world. My research and industry work has been on the intersection of data and AI, specifically on Knowledge Graphs over the past 20 years.

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