Based in Prague ยท Open for collaboration

Jakub Neumann

Full-Stack Developer

I build full-stack web apps. Fast frontends, backends that don't fall over, and a focus on actually shipping.

projects.json

My Work

A mix of internal tools and public products I've built end to end.

  • Internal system for a crane rental company

    JVS

    React, Contember, Cloudflare Workers +6
    View project
    Private
  • Internal system for psychedelic clinic

    Psyon

    React, Contember, Cloudflare Workers +6
    View project
    Private
  • Podcast management & streaming platform

    Vlny

    Tanstack Start, Contember, Cloudflare Workers +3
    View project
    Visit Vlny project

Approach

I care about performance, reliability, and clean architecture. No shortcuts, no bloat.

AI is part of my workflow, but I'm the one making the decisions. I adopt what works and drop what doesn't.

$ whoami
> full-stack dev
> ai-assisted, human-led
> new tech enthusiast
$
tools.json

Tools & Open Source

Developer tools I've built, plus open source projects I help maintain.

  • Echo

    User feedback capture with screenshots & annotations

    Lightweight in-app feedback widget. Captures screenshots, annotations, and debug info in one report. Built with Solid.js so it drops into any web app. Made during my work at Contember.

    • - Screenshot capture with on-canvas annotations
    • - Auto-bundles debug info with each report
    • - Framework-agnostic, embeds in any web app
    • - Lightweight, dependency-light core
    Solid.jsTypeScriptCSS

  • Hatch

    Worktree-native dev environment manager

    Automates the boring parts of local dev for full-stack apps: per-worktree ports, Docker containers, secrets, migrations, MCP config. Pure Bash, runs on macOS and Linux.

    • - Per-worktree isolated ports, containers, and secrets
    • - Automated dependency install, migrations, and seeding
    • - MCP config generation for AI coding tools
    • - Single command to spin up a full dev environment
    BashDockerGit Worktrees Apache 2.0
  • Contributing to

    Okena

    Native terminal multiplexer in Rust + GPUI

    Open source terminal multiplexer by Contember. Native and fast, built in Rust on GPUI (the UI framework from Zed). Tabs, splits, detachable windows, command palette, and workspace restore. I contribute as part of my work at Contember.

    • - Tabs, splits, and detachable windows
    • - Command palette and automatic workspace restore
    • - Native performance via Rust + GPUI
    • - Backed by Contember, MIT licensed
    RustGPUITypeScript MIT

  • Vigil

    AI-powered task automation daemon

    Picks up tasks from external sources, hands them to Claude Code, and opens pull requests automatically. Sorts work by complexity: trivial stuff auto-merges, complex stuff gets analysed first.

    • - Autonomous task discovery and execution
    • - Complexity-tiered PR automation
    • - Real-time React dashboard for monitoring
    • - Runs as a background daemon with CLI control
    TypeScriptHonoReactSQLite Apache 2.0

  • Almanac

    Portable skills for LLM coding agents

    My personal collection of reusable skills for everyday dev workflows: git, PRs, CI, TDD, planning. Built on the Agent Skills Open Standard so it works across Claude Code, Cursor, Codex, and others.

    • - Skills for git, CI, TDD, and planning workflows
    • - Works across many LLM coding agents
    • - Implements the Agent Skills Open Standard
    • - Fully portable: Bash CLI plus Markdown skill files
    BashMarkdownAgent Skills Standard MIT
contact.md

Contact

Based in Prague. Happy to talk about your project.

tech-stack.json

Tech Stack

The tools I reach for, from frontend to infrastructure.

  • Core Stack
    • TypeScript
    • React
    • Tailwind
    • Node.js
  • Also Experienced With
    • Contember
    • Hono
    • Solid.js
    • TanStack
    • Cloudflare
    • ...and more
  • Integrations
    • SmartEmailing
    • Fakturoid
    • Digisign
    • GoPay
get-in-touch.md

Got a project in mind?
Open to freelance work, full-time roles, and collaborations.

Get in Touch