Founder @workersio (YC F26) - All things software reliability

San Francisco
Joined June 2021
Internet really is falling apart, a year ago my @solofounders cohort and I first spoke about "fixing the internet" The cracks are finally starting to show in a big way. Until now, teams could get away with sloppy engineering and poor security practices purely because the cost of compromising systems was super high. That is no longer the case, now all it takes is a few tokens a single gap in your system for it to fall apart. eMudra incident is not going to be the last one and it'll be irresponsible for teams to not have dedicated budget just for security and correctness of their systems. @workersio will have a big part to play in this!
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Chaitanya retweeted
Replying to @anuraggoel
"We’ll need verification that works as code is generated and executed, without a human reading every line." ^ @chaaai
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This!
Replying to @RhysSullivan
We're finally all going to be accountable for broken software. It's overdue.
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Chaitanya retweeted
The internet needs fixing and Chai is doing it.
Internet really is falling apart, a year ago my @solofounders cohort and I first spoke about "fixing the internet" The cracks are finally starting to show in a big way. Until now, teams could get away with sloppy engineering and poor security practices purely because the cost of compromising systems was super high. That is no longer the case, now all it takes is a few tokens a single gap in your system for it to fall apart. eMudra incident is not going to be the last one and it'll be irresponsible for teams to not have dedicated budget just for security and correctness of their systems. @workersio will have a big part to play in this!
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Chaitanya retweeted
Apropos of nothing… Two @solofounders companies: 1/ @openhack - always on AI security engineer by @ananayarora 2/ @workersio - simulation environments for verifying mission critical software by @chaaai
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It's always the theatrics that gets you!
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So many teams have traded understanding and safety for velocity. They didn't have to, you really can have it all!
can you fucking imagine how broken the entire software supply chain is? some random company can issue trusted certificates and somehow end up with d=4 as a private key. and this is just one example of the insanity across countless layers of software we depend on.
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Anyone I know looking to try out a new DST product? they're small but have already closed a few interesting logos, seem to have a good product, and very very affordable
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Praneeta is one of my fav solo founders building in healthcare. A few of my family members suffer from chronic conditions and I have seen up-close how serious this problem is. Great product, incredible momentum, with retention numbers I have rarely seen!
I left @Apple to build healthcare that listens and acts early. Today, I'm excited to introduce UniqueHuman. We're building proactive healthcare agents that handle every step of care for people with chronic conditions. Our mission is to end chronic suffering. Today, we begin with migraines.
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Good take!
Deterministic simulation testing should be part of every conversation with your coding agent. Otherwise, you’re doing it wrong™️
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Chaitanya retweeted
How to test for failures that only happen in production? Most teams test their system in a perfect world. However, in production, packets get lost, machines crash and even disks fail. To verify against these failures, you need a fault model: every part your system depends on, from the network, system calls, memory, disk, and the ways each one can fail. Writing one takes deep knowledge of every layer, and most teams never get to it. At Workers IO, we build that fault model for you, then run your entire system through a different mix of failures every time. When things breaks, you get the exact scenario that caused it with perfect reproducibility.
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Our workload generator just found a really interesting failure. It simulates people typing into many remote sessions at once, over a network it deliberately makes slow, lossy or out of order. The system prioritizes what it sends, so the echo of a keystroke goes out ahead of a flood of logs. But when the network got slower after it connected, we kept sending at the old speed. The extra data piled up in the network, so every keystroke waited behind it and lagged by about half a second. Most teams never write scenarios like this, let alone test against them. It's just a default for us :)
What does it take to verify mission-critical software? One of the most difficult things when it comes to testing complex systems is figuring out all the ways it can fail. How your system can behave in production is not just limited to the code, you also need to look at the behavior of the infrastructure that it runs on and how your customers are using it. At Workers IO, we’ve put a lot of work into a workload generator that turns this mental exercise into a compute problem. Here’s how it works.
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We are solving all the hard parts about software verification, so more teams can take on more ambitious problems.
What does it take to verify mission-critical software? One of the most difficult things when it comes to testing complex systems is figuring out all the ways it can fail. How your system can behave in production is not just limited to the code, you also need to look at the behavior of the infrastructure that it runs on and how your customers are using it. At Workers IO, we’ve put a lot of work into a workload generator that turns this mental exercise into a compute problem. Here’s how it works.
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We will just fix things when they break they said!
‼️ BREAKING: Albert Heijn, the biggest Dutch supermarket chain, has halted online grocery deliveries after a cybersecurity incident. It and its sister drugstore and liquor chains switched off their websites, apps and customer service. In stores, shelf labels still show last week's discounts.
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State of coding agents in 2026 Opus 5.5 pretty much one shot it in a few hours. - Native MacOS - No dependencies - Persistent remote connection with native scroll @almonk can I please get invite to the non-slop version please?
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One of the hardest things we do at @workersio is assigning a severity to a finding. It’s a big responsibility because we must to do a better job than our customers. If we downplay a finding it may end up getting deprioritized and lead to a more serious incident later on, but it’s also just as easy to annoy people if we overstate things. The biggest advantage we have is, every finding is used to chain things and explore new behavior, makes this job a lot easier than looking at things in isolation.
Our AI found a bug that let anyone mint infinite XRP, with $94B at risk. It had been hiding in one of the most audited codebases in crypto for nearly a decade, and earned us the maximum $250K bounty. Here's how it went unnoticed, and how we found it.
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Our simulation logs are so scary when the agent tails it, Mythos 5.1 bricks itself! Most people will never be able to get agents to test their software properly. Come to us, we give nightmares to your software!
Introducing Workers IO Agents are making it possible to turn ideas into software faster than ever. To keep up with that, we need better ways to understand how our software will behave in real-world. Workers IO runs your entire system through millions of simulated futures, exploring what happens when machines fail, networks slow down, and events arrive in the wrong order. It searches for the combinations that break your system before your customers encounter them. Every failure it encounters is perfectly reproducible, helping teams understand what happened, work on a fix, and verify against the same scenario. This ability changes what teams are willing to take on. Difficult engineering decisions become things that you can explore and verify. That’s the future we’re working toward: small teams building increasingly ambitious systems, with the evidence to stand behind. I can’t wait to see what you build with that confidence.
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X do your thing help us get three more “9”s
Introducing Workers IO Agents are making it possible to turn ideas into software faster than ever. To keep up with that, we need better ways to understand how our software will behave in real-world. Workers IO runs your entire system through millions of simulated futures, exploring what happens when machines fail, networks slow down, and events arrive in the wrong order. It searches for the combinations that break your system before your customers encounter them. Every failure it encounters is perfectly reproducible, helping teams understand what happened, work on a fix, and verify against the same scenario. This ability changes what teams are willing to take on. Difficult engineering decisions become things that you can explore and verify. That’s the future we’re working toward: small teams building increasingly ambitious systems, with the evidence to stand behind. I can’t wait to see what you build with that confidence.
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Crazy this video got us to 955 followers in a day. Thanks @claudeai for helping out a solo founder ;)
Introducing Workers IO Agents are making it possible to turn ideas into software faster than ever. To keep up with that, we need better ways to understand how our software will behave in real-world. Workers IO runs your entire system through millions of simulated futures, exploring what happens when machines fail, networks slow down, and events arrive in the wrong order. It searches for the combinations that break your system before your customers encounter them. Every failure it encounters is perfectly reproducible, helping teams understand what happened, work on a fix, and verify against the same scenario. This ability changes what teams are willing to take on. Difficult engineering decisions become things that you can explore and verify. That’s the future we’re working toward: small teams building increasingly ambitious systems, with the evidence to stand behind. I can’t wait to see what you build with that confidence.
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