Kore helped pioneer test-driven development in the PHP ecosystem, working alongside Sebastian Bergmann, Tobias Schlitt, and Derick Rethans on eZ Components; the test-driven PHP component library (now Zeta Components, where his Graph and Document libraries are still in use).

Spent 7 years consulting with 100+ development teams, turning unmaintainable legacy codebases into shipping machines, together with Tobias Schlitt and Manuel Pichler.

Served as CTO and co-founder at Frontastic, scaling from zero to €2M ARR and 70 employees before a successful exit to commercetools. Proving these patterns hold up through multiple pivots, 25x traffic spikes, and acquisition.