Jakub Dvořák

import { ZoplioClient } from "@zoplio/sdk-js";const zoplio = new ZoplioClient({  apiKey: process.env.ZOPLIO_API_KEY!,});const { meetingId } = await zoplio.scheduleMeeting({  title: "Q3 planning review",  participants: [{ email: "anna@example.com" }],});

How I work

Day to day I build with Claude Code: I write a short spec first, keep each change small and read every diff before it goes in. The thesis wallet and my kernel code I wrote almost entirely by hand. And I like writing things down, so my projects come with READMEs, docs and a dated lab log, wrong turns included.

Since October 2026 I send fixes to open-source projects I use. Merged so far:

• PostHog/posthog-js #5325: session replay kept recording network requests after the client had turned that off. I hit it on my own site and fixed it, with unit and Playwright tests.
• trezor/trezor-suite #33691 and sebbo2002/ical-generator #804: documentation fixes.

I go with Lukáš Hellesch: I write the code, he does the product side.

1. Oct 2026

   AirGap Mandates

   FinTechers Hackathon

   Track “Securing the agentic bank”, two days. A bank’s AI agent proposes payments but can’t pay: money moves only within a mandate signed on a Trezor, and every step goes into a log anyone can verify offline.

   Code →

2. Sep 2026

   Heirloom

   Cursor Hackathon Prague

   One afternoon. An AI grandson that phones Grandpa and turns his stories into a family archive, each paragraph traced back to what he said.

   Code → · Demo → (free hosting, may take about 20 s to wake)

   

3. Jun 2026

   Grant Ops

   Prague Builder Day, Duvo × Anthropic

   An agent that checks a research grant’s expenses against the funder’s rulebook and cites the rule for each flagged line. No public code.

Alongside engineering I study how neural networks carry what they know and how they use their memory. Where I’m heading is the overlap of high-performance deep learning and AI safety. I work without a supervisor and publish nulls too.

• Absorption Atlas: how Gemma-2 carries a concept depends on what kind of concept it is. 16-page technical report.
• superposition-phases: in toy models, the superposed code grows continuously out of the dedicated-neuron solution. Write-up finished, not public yet.
• Memory in long-context LLMs: running, first measurements through November.

Results, figures, status, and an earlier null result on chain-of-thought monitoring: the research page.

• sectionsight: an agent skill for Claude Code, Codex and Gemini CLI that sets up cookieless website analytics, measuring which sections people actually read, and checks the result in a real browser with Playwright. MIT licensed. Code
• GazeUp: daily Czech-language AI news as short videos on Instagram and TikTok, plus a weekly newsletter, made with my own render pipeline and with every item citing its source. gazeup.cz
• Ant Colony Simulator: a multi-colony foraging simulator in Unity and C#, a solo course project with evaporating pheromone trails and a sandbox map editor. Code

I’m looking for a role as an AI engineer or backend engineer, in Prague or remote, as an employee or on a contract. Recruiters and hiring managers are both welcome, and I’m glad to walk through any of the code above. A short email with the role, the team and whether it is employment or a contract is plenty.