Mark Pentus

also known as Marker-bit

Germany - Frankfurt / Berlin

About

I'm Mark Pentus, a developer based in Germany between Frankfurt and Berlin. Under the handle Marker-bit, I build intelligent systems and developer tooling, with a focus on terminal workflows, AI agents, and crypto architecture.

Projects

Marker-bit/rjflagshipAI reading recommendation engine

Marker-bit/rj is an AI reading recommendation engine using neural networks and collaborative filtering to surface the right reads.

Skills

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TypeScript (favorite)

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Python

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Rust

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Go

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C++

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Java

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JavaScript

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C

Focus areas

Terminal workflows - fast, keyboard-first tooling built for the command line.

AI agents - autonomous systems that reason, plan, and act on their own.

Crypto architecture - designing the primitives and systems behind digital assets.