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Ethan Batraski

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@ethanjb

Venture Capitalist, Partner @Venrock, writing about open-source infrastructure and hard engineering at ethanjb.com
San Francisco ethanjb.com Joined March 2009
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Ethan Batraski Verified account @ethanjb
When hiring your first 10-15 engineers, forget ‘10x engineers,’ focus on ‘engineers who give a sh*t’ - who care about building it right, think about the next 4 releases, learn to become domain experts, eager to hear user feedback, care about the business and their part in supporting it, will burn the midnight oil to get it done without being prompted, are excited to write the docs, push those around them to be better, want to be part of the interview circuit, keep linear/jira clean and up to date, start to dig into the competitors, add that extra polish because they can’t imagine doing it any other way.

Companies are representations of the people that build them.

When building a company, find team members who really ‘give a sh*t,’ it’s the only way.
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Ethan Batraski Verified account @ethanjb
Cursor for Agents is here 🔥🔥
Manos Koukoumidis Verified account @Koukoumidis Nov 4
We're using AI agents to automate everything. Except the engineering of AI agents themselves.

That seemed backwards to us.

What if you could train your own specialized AI agent with just 15 minutes of your time instead of months of AI engineering?

Would you keep renting the same expensive generic models as your competitors, endlessly patching prompts and harnesses until you hit a wall?

Today, we're launching the agent that builds, trains, and continuously improves AI agents. 🚀

Meet FAiE, our Frontier AI Engineer. Describe what your agent should accomplish, and FAiE designs evaluations, diagnoses failures, curates data, selects training strategies, and runs experiments.

15 minutes of your effort. A few hours of automated AI engineering. Your own specialized agent, with its model weights trained for your task.

Already have an agent? Keep your harness. Connect it to @oumi_ai and train the model behind it with SFT, DPO, or GRPO (Private Preview).

The agent that builds your best agent.

Excited to see what you build: platform.oumi.ai
Live demo today at 10 AM PT: oumi.ai/events/fall26
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Ethan Batraski Verified account @ethanjb
I am regularly asked what we @Venrock look for in frontier & deep tech teams at the Series A:

1. technology is past scientific possibility
2. customer commitment is real, not just interest
3. unit economics strengthen with deployment
4. team is uniquely credible for the next bottleneck

Most rounds get stuck on #2.
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Ethan Batraski Verified account @ethanjb
When a measure becomes a target, it stops being useful 🔥 @MelMitchell1
Venrock @Venrock Apr 1
🎙We’re back with a conversation between one of the greatest minds in AI research @MelMitchell1 of the @sfiscience and @ethanjb. Tune in for perspectives on AI capabilities, performance benchmarks, and the path forward that’s grounded in evidence: bit.ly/3PFyYAF
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Ethan Batraski Verified account @ethanjb
What does a Defense Neo-Prime look like?

When companies like Anduril Industries, Shield AI, or Epirus emerge, three things are usually true very early:

1) A clear step-change capability
e.g., autonomous targeting, microwave drone defeat, autonomous ISR.

2) Immediate operational demand
units actively trying to buy the system.

3) System-level control
not just a component, but a platform that owns the architecture.