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15 Years of Building Jefit

Embrace the Grind: 15 Years of Building Jefit The Start of Something I Didn't Expect to Last 15 Years Fifteen years ago, Jefit wasn't a company. It wasn't even a business idea. It was just a project I started in my dad's living room in North Carolina, fresh out of college, working from my own laptop. I was broke and unsure about the future, frustrated by how hard it was to track workouts. There was no easy way to stay consistent or see real progress. I wasn't chasing a startup dream, jus

15 Years If Jefit

Embrace the Grind: 15 Years of Building Jefit The Start of Something I Didn't Expect to Last 15 Years Fifteen years ago, Jefit wasn't a company. It wasn't even a business idea. It was just a project I started in my dad's living room in North Carolina, fresh out of college, working from my own laptop. I was broke and unsure about the future, frustrated by how hard it was to track workouts. There was no easy way to stay consistent or see real progress. I wasn't chasing a startup dream, jus

Weave (YC W25) is hiring an AI engineer

At Weave, we’re building the best software for the best engineering teams to move faster, and we want to hire exceptional engineers to help us do so. We are a well-funded startup, backed by top investors, growing rapidly and currently profitable. You'll be working directly with me (Andrew), the CTO. Before I was CTO of Weave I was the founding engineer at Causal, and I want to give you all the support and growth opportunities in this role that I got when I went through it. You’ll also be work

5 days until TechCrunch All Stage — save up to $475 before prices rise

In just five days, startup leaders from across the country will descend on Boston’s SoWa Power Station for TechCrunch All Stage 2025 — and your chance to lock in the lowest ticket prices will be gone. Whether you’re preparing for your next raise, looking to fine-tune your go-to-market strategy, or building your founding team, TC All Stage is where real startup momentum happens. This is a full-day event packed with actionable sessions, tactical advice, and conversations that push your company fo

Archaeologists unveil 3,500-year-old city in Peru

Drone footage released by researchers shows a circular structure on a hillside terrace at the city's centre, surrounded by the remains of stone and mud buildings. Eight years of research at the site unearthed 18 structures, including ceremonial temples and residential complexes. In buildings at the site, researchers discovered ceremonial objects, clay sculptures of human and animal figures and necklaces made from beads and seashells. Peñico is situated close to where Caral, recognised as the

Moroccan founder raises $4.2M for her YC-backed startup building the next layer of AI search

As generative AI reshapes industries, one of its most important yet invisible challenges is retrieval, the process of fetching the right data with relevant context from messy knowledge bases. Large language models (LLMs) are only as accurate as the information they can retrieve. That’s where ZeroEntropy wants to make its mark. The San Francisco-based startup, co-founded by CEO Ghita Houir Alami and CTO Nicolas Pipitone, has raised $4.2 million in seed funding to help models retrieve relevant da

Bootstrapping a side project into a profitable seven-figure business

Bootstrapping a side project into a profitable seven-figure business in four years. We really did it! We bootstrapped ProjectionLab to $1,000,000 in annual recurring revenue. And I’m still processing that this is real. 🥹 Back in 2021, I was inspired by the financial independence movement and wanted a better way to plan my own life. I couldn’t find the right tool, so I started building. I had no idea that side project would one day help over 100,000 households plan for their financial future

Why the simplest desktop agent abstraction wins

This is first post in a series about the design and implementation of Bytebot . Give us a star on our open source repo . We’re still in the early innings of AI agents. There are hundreds of companies building wrappers around LLMs, trying to make them more useful; more tool-aware, more stateful, more capable of completing tasks across applications. But most of them are barking up the same tree: they’re building agents that work by connecting APIs and tools in structured ways. Bytebot was born o

Continue (YC S23) is hiring software engineers in San Francisco

Why you should join Continue We believe there is an opportunity to create a future where developers are amplified, not automated. This is why we are enabling developers to create, share, and use custom AI code assistants with our open-source IDE extensions and hub of models, rules, prompts, docs, and other building blocks. Headquartered in San Francisco, Continue (YC S23) is funded by Heavybit and angels like Julien Chaumond (co-founder of Hugging Face), Lisha Li (founder of Rosebud AI), and F

Wind Knitting Factory

Wind Knitting Factory ‘Wind Knitting Factory’ is a wind powered knitting machine that is attached to the facade of a building. The blades embrace more than a meter in diameter, and the wind that is cached by the mill drives the machine. Like that a long scarf gets knitted along the building downward. When it is windy the machine knits fast and with less wind the machine knits slowly. Buy them here Wind Knitting Factory ‘Wind Knitting Factory’ is a wind powered knitting machine that is attache

TechCrunch All Stage brings back early launch prices for a limited time

We’re almost there, and ticket rates have officially rolled back with savings of up to $425. TechCrunch All Stage, the founder summit of the year, is just around the corner. On July 15, Boston becomes startup central. Are you ready to gain the insights and strategies you need to launch or scale? Now’s the moment For a limited time, we’ve brought back early launch pricing. Founders pay just $155. Investors, only $250. These are the lowest rates you’ll see before the doors open at SoWa Power St

The Hidden Engineering of Liquid Dampers in Skyscrapers

[Note that this article is a transcript of the video embedded above.] There’s a new trend in high-rise building design. Maybe you’ve seen this in your city. The best lots are all taken, so developers are stretching the limits to make use of space that isn’t always ideal for skyscrapers. They’re not necessarily taller than buildings of the past, but they are a lot more slender. “Pencil tower” is the term generally used to describe buildings that have a slenderness ratio of more than around 10 to

London's largest ancient Roman fresco is “most difficult jigsaw puzzle”

Timelapse of the MOLA specialist team reassembling a section of wall plaster. All images © MOLA (Museum of London Archaeology), shared with permission London’s Largest Ancient Roman Fresco Makes for the ‘World’s Most Difficult Jigsaw Puzzle’ ArtHistory Kate Mothes Share Pin Email Bookmark One of the remarkable things about a city like London, which has been inhabited for nearly 2,000 years, is that no matter where a developer chooses to build, chances are there’s some relic of the past buried

London's Largest Ancient Roman Fresco Is “Most Difficult Jigsaw Puzzle”

Timelapse of the MOLA specialist team reassembling a section of wall plaster. All images © MOLA (Museum of London Archaeology), shared with permission London’s Largest Ancient Roman Fresco Makes for the ‘World’s Most Difficult Jigsaw Puzzle’ ArtHistory Kate Mothes Share Pin Email Bookmark One of the remarkable things about a city like London, which has been inhabited for nearly 2,000 years, is that no matter where a developer chooses to build, chances are there’s some relic of the past buried

Spark AI (YC W24) is hiring a full-stack engineer in SF (founding team)

About Us ⚡️ Join us to accelerate the energy transition with technology. At Spark, we’re building the AI engine behind the next generation of renewable energy infrastructure. Our mission is simple yet ambitious: To help renewable energy developers build solar farms, battery storage plants, and related projects more efficiently. If you’re excited to see your products directly accelerate the energy transition, read on. We’re already powering decision-making for industry leaders like Colliers En

Apple shells out US$350M to acquire yet another office campus it was already leasing

It’s been a good week for Apple’s real estate team. Just days after finalizing a $166.9 million deal for the Cupertino Gate office complex, the company has closed another major acquisition, pushing its South Bay real estate tab to over half a billion dollars in a single week. US$516 million in South Bay acquisitions As reported by SilliconValley.com (via AppleInsider), Apple has just closed a $350 million deal to purchase Mathilda Commons, a two-building 382,500 square feet office campus in Su

Rollback rates: TechCrunch All Stage brings back early launch prices for a limited time

We’re almost there, and ticket rates have officially rolled back with savings of up to $425. TechCrunch All Stage, the founder summit of the year, is just around the corner. On July 15, Boston becomes startup central. Are you ready to gain the insights and strategies you need to launch or scale? Now’s the moment For a limited time, we’ve brought back early launch pricing. Founders pay just $155. Investors, only $250. These are the lowest rates you’ll see before the doors open at SoWa Power St

Jon McNeill brings the operator’s playbook to TechCrunch All Stage

Founders are often told to chase product-market fit before anything else, but what if scaling too soon, too fast, is what’s really holding them back? At TechCrunch All Stage 2025 on July 15 in Boston, Jon McNeill, CEO and co-founder of DVx Ventures (and former president of Tesla and COO of Lyft), will take the Scale Stage to flip the script on conventional startup growth advice. His session, “The Operator’s Playbook for Building and Scaling Sustainable Companies,” explores why the next generat

Ticket-Driven Development: The Fastest Way to Go Nowhere

When every dev is just doing the next ticket, who’s steering the ship? Let me guess how your day started. You opened your laptop, fired up the sprint board, and grabbed the next ticket in the “Ready” column. Maybe it was a small feature. Maybe a bug. Either way, you didn’t write it, you didn’t scope it, and you definitely didn’t question it. Because that’s not how it works here. We are Ticket-Driven Developers now. Thinking is out. Throughput is in. Tickets are moving. Morale is not. The A

Introducing the Going Public Stage at TechCrunch Disrupt 2025

For the first time ever, TechCrunch Disrupt is launching the Going Public Stage — a brand-new destination for founders navigating the mid and late stages of company building. This content is essential for any founder, but especially those scaling fast, preparing for exit, or reimagining what comes next. Because whether you’re at the seed stage or Series E, the most successful founders are always thinking 10 steps ahead. You’ll hear from some of the biggest names in tech and venture — including

Why we’re focusing VB Transform on the agentic revolution – and what’s at stake for enterprise AI leaders

Join the event trusted by enterprise leaders for nearly two decades. VB Transform brings together the people building real enterprise AI strategy. Learn more Tomorrow in San Francisco, VentureBeat’s Transform 2025 kicks off. For years, this has been the leading independent gathering for enterprise technical decision-makers — the hands-on builders and architects on the front lines of applied AI. Our mission has always been to cut through the hype and focus on the most critical, execution-orient

Weave (YC W25) is hiring a founding AI engineer

At Weave, we’re building the best software for the best engineering teams to move faster, and we want to hire exceptional engineers to help us do so. We are a well-funded startup, backed by top investors, growing rapidly and currently profitable. You'll be working directly with me (Andrew), the CTO. Before I was CTO of Weave I was the founding engineer at Causal, and I want to give you all the support and growth opportunities in this role that I got when I went through it. You’ll also be work

Qfex (YC X25) – Back End Engineer for a 24/7 Stock Exchange

Founding Backend Engineer Mission QFEX is building a team of founding engineers who can design, code and own systems that will soon process billions of dollars in trading volume every single day. This is an incredible opportunity to work alongside a very well-backed team of builders from some of the biggest financial companies in the world (Citadel, Kraken, Tower Research Capital) and change the course of financial history. What You’ll Do Reliability & performance Design fault-tolerant, low

Qfex (YC X25) – Founding Back End Engineer for a 24/7 Stock Exchange

Founding Backend Engineer Mission QFEX is building a team of founding engineers who can design, code and own systems that will soon process billions of dollars in trading volume every single day. This is an incredible opportunity to work alongside a very well-backed team of builders from some of the biggest financial companies in the world (Citadel, Kraken, Tower Research Capital) and change the course of financial history. What You’ll Do Reliability & performance Design fault-tolerant, low

Bulk Up: The 8 Best Foods for Building Muscle

Spending time at the gym isn't the only thing that can help you build muscle. While putting in time at the gym is the first step, eating well also makes a major difference. Building muscle requires proper nutrition to recover from workouts, and starving yourself isn't going to cut it. If you aren't eating right, you might not see the results you've been working for. That's where food comes in. A smart, balanced diet-especially one packed with high-quality protein, can make a major difference in

Building Effective AI Agents

Over the past year, we've worked with dozens of teams building large language model (LLM) agents across industries. Consistently, the most successful implementations weren't using complex frameworks or specialized libraries. Instead, they were building with simple, composable patterns. In this post, we share what we’ve learned from working with our customers and building agents ourselves, and give practical advice for developers on building effective agents. What are agents? "Agent" can be de

Darklang Goes Open Source

As part of shutting down Dark Inc. and forming Darklang Inc. , we've finally open-sourced all of our repositories. Our source code is now under the Apache License 2.0. For years, we wrestled with questions of sustainability and how to build something that truly empowers developers. We've long believed in open source philosophically, but felt that Darklang's unique architecture and business model required a different approach. Why We Initially Chose Source-Available We originally designed Dark

The Skyscraper That Could Have Toppled over in the Wind (1995)

Within this seemingly simple computation, however, lurks a powerful multiplier. At any given level of the building, the compression figure remains constant; the wind may blow harder, but the structure doesn’t get any heavier. Thus, immense leverage can result from higher wind forces. In the Citicorp tower, the forty-per-cent increase in tension produced by a quartering wind became a hundred-and-sixty-per-cent increase on the building’s bolts. Precisely because of that leverage, a margin of safe

Solidroad (YC W25) Is Hiring

Every day, millions of customers have terrible experiences. Support teams get blamed. Budgets get slashed. Quality drops further. Everyone shrugs and calls it "the cost of doing business." We think that's wrong. We started Solidroad because we believe customer experience can be both excellent and efficient. We're building the AI that turns every customer conversation into a learning opportunity. We're creating software that makes customer teams more effective. And we're just getting s