Sascha Greuel

About

I maintain the parts of software that need to stay understandable after launch.

Alles kann. Nussmix.

Available for maintenance, modernization, release engineering, and developer tooling work.

Based in Gladbeck, Germany. Remote across CET hours.

What I work on

02

Release engineering

Build pipelines, packaging, compatibility matrices, and checks that make releases repeatable.

03

Legacy modernization

Incremental migrations that remove obsolete assumptions without hiding compatibility risk.

Working style

  1. 01

    Start with the real constraints: supported versions, users, data, and release boundaries.

  2. 02

    Ship narrow changes with evidence from tests, builds, and the downstream systems that matter.

  3. 03

    Document what changed, what was verified, and what still depends on production access.

Home base
Gladbeck, Germany
Collaboration
Remote-first in CET, with written updates and focused working sessions.
Engagements
Long-running maintenance, focused migrations, and release work.
Principles
Clear communication, small changes, and code that remains operable.

Core strengths

Languages

TypeScript, C, HTML, PHP, C++, JavaScript, Astro

Frameworks & platforms

OpenAI GPT, AI Platforms, Machine Learning, Natural Language Processing, Mistral AI, Perplexity AI, WoltLab Suite

Tooling

Docker, JSON Flattening, JSON Data Tooling, JSONPath, JSON Filtering, XPath, JSON Parsing

Cloud & platforms

World of Warcraft, Steam Platform, OpenWeather

Data & storage

Cryptography

Maintained projects

Select public repositories I keep polished and production-ready.