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412 followers · 134 following

Sponsors

@Experio-AI

Achievements

Achievement: Pull Sharkx4Achievement: Starstruckx4Achievement: Galaxy Brainx2Achievement: Pair Extraordinairex4Achievement: QuickdrawAchievement: YOLOAchievement: Arctic Code Vault Contributor

Achievements

Achievement: Pull Sharkx4Achievement: Starstruckx4Achievement: Galaxy Brainx2Achievement: Pair Extraordinairex4Achievement: QuickdrawAchievement: YOLOAchievement: Arctic Code Vault Contributor

Organizations

@typeddjango @snok @grantflow-ai

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Goldziher/README.md

Hey there 🖖

I'm Na'aman Hirschfeld — a Berlin-based startup founder, freelance software engineer, and open-source enthusiast.

I'm a co-founder and CEO of kreuzberg.dev — building a polyglot document intelligence engine with a Rust core. On the freelance side, I work with companies like Armis Security and fincom.co.

I code in Rust, Python, Go, TypeScript, and whatever else the problem calls for.

Kreuzberg

My main focus. Kreuzberg is a fast, polyglot document intelligence engine that extracts structured data from 75+ document formats using streaming parsers and built-in OCR. Available for Rust, Python, Ruby, Java, Go, PHP, Elixir, C#, TypeScript — or via CLI, REST API, and MCP server.

Repo Stars
kreuzberg GitHub stars
html-to-markdown GitHub stars

Open Source

API Frameworks

Testing & Mock Data

  • Polyfactory GitHub stars — Mock data generation library using Python's type system. I created this.
  • Interface Forge GitHub stars — TypeScript mock data factories using types and zod schemas.
  • Fabricator GitHub stars — Go factories for mock data generation.

Dev Tooling

  • AI Rulez GitHub stars — Universal config manager for AI coding assistants. Define rules once, sync to Claude, Cursor, Copilot, etc.
  • Tree Sitter Language Pack GitHub stars — A tree-sitter-powered language pack for parsing and analyzing programming languages.
  • Uncomment GitHub stars — Blazingly fast CLI to remove comments from code using tree-sitter grammars.
  • GitFluff — The ultimate commit linter.

Utility Libraries

  • Go Utils GitHub stars — Go generics utilities inspired by JavaScript and Python.
  • Type Predicates GitHub stars — Comprehensive TypeScript type-guards, type assertions, and related utils.
  • Prompt Template — Flexible library for creating prompt templates.

Broken Dreams

Failed startups and abandoned projects — each one a lesson.

  • GrantFlow.AI — STEM grant application writing platform.
  • BaseMind.AI — High performance LLM gateway with gRPC-generated clients.
  • Devlingo — AI-powered design system.
  • ProductHound — WhatsApp-based product recommendation chatbot.

Let's Connect

Pinned Loading

  1. kreuzberg-dev/kreuzberg kreuzberg-dev/kreuzberg Public

    A polyglot document intelligence framework with a Rust core. Extract text, metadata, and structured information from PDFs, Office documents, images, and 75+ formats. Available for Rust, Python, Rub…

    HTML 6k 258

  2. ai-rulez ai-rulez Public

    The universal configuration manager for your AI assistants. Define context once in a single ai-rulez.yml file, and use the CLI to generate synchronized instructions for Claude, Cursor, Copilot, and…

    Go 85 6

  3. litestar-org/litestar litestar-org/litestar Public

    Light, flexible and extensible ASGI framework | Built to scale

    Python 8k 511

  4. litestar-org/polyfactory litestar-org/polyfactory Public

    Simple and powerful factories for mock data generation

    Python 1.4k 107

  5. interface-forge interface-forge Public

    Graceful mock-data generation using TypeScript

    TypeScript 100 9

  6. kreuzberg-dev/html-to-markdown kreuzberg-dev/html-to-markdown Public

    High performance and CommonMark compliant HTML to Markdown converter. Maintained by the Kreuzberg team. Kreuzberg is a fast, polyglot document intelligence engine with a Rust core. It extracts stru…

    HTML 512 46