Tobias Wrenfeld

Secure your codebase before your first engineer arrives.

Senior technical leadership without the full-time cost.

Know when a part-time CTO stops meeting your startup's needs.

Understanding the four pricing structures reveals what you're actually buying from a fractional CTO.

Fractional CTOs prevent founders from making costly technical decisions alone at critical moments.

Staging environments may miss production-scale problems that cause real outages.

Access quietly accumulates in systems until an audit reveals who shouldn't still have it.

CI validates each migration in isolation, not the combined sequence that reaches production.

Multi-stage container builds pass variables to the wrong stage, silently breaking API calls.

A real audit reveals specific structural problems that rewrite instincts usually miss.