App Diagnosis & Repair by Robert KaltenbachApp Diagnosis & Repair by Robert Kaltenbach

I specialize in stabilizing and restoring existing applications that have stalled due to technical debt, incomplete implementations, or unreliable production behavior. My approach combines structured diagnosis with targeted engineering fixes to reinforce core systems, resolve deployment and authentication issues, and reestablish a dependable foundation for continued development or launch. The result is a clear, functional application state that teams can confidently test, demo, iterate on, or take to market.

What's included

System Audit & Diagnosis

Before touching code, I perform a structured technical audit to identify root causes and risk areas. Includes: • Environment & deployment review (dev / preview / prod) • Authentication & user flow verification • Backend services & database integrity check • Dependency, build, and configuration analysis • Clear identification of blocking vs. non-blocking issues Deliverable: A concise Repair Plan outlining: • What’s broken (and why) • What’s risky but recoverable • What can be safely ignored or deferred • Recommended fixes and priority order

Targeted Repair and Stabilization

I implement focused fixes that restore functionality without unnecessary rewrites. Includes (as applicable): • Authentication & session repair • Build / deployment failures • API & backend logic fixes • Database schema or data corrections • State, routing, or flow issues • Platform-specific fixes (web, iOS, Android, Expo, etc.) Deliverable: A working, stable application state with verified core flows (sign-in, navigation, critical actions).

Environment & Deployment Validation

Many apps “work locally” but fail at launch. This step ensures the app behaves correctly where it actually matters. Includes: • Production parity checks • Environment variable & secret validation • Hosting / publishing configuration fixes • TestFlight / App Store / Play Store readiness (if applicable) • Demo-ready Deliverable: A verified deployment or distribution build that behaves as expected outside of preview mode.

Clean Handoff & Future-proofing

Once the app is stable, I make sure you’re not stuck again. Includes: • Cleaned source files and updated configs • Documentation of key fixes and architectural notes • “What to touch / what not to touch” guidance • Optional recorded walkthrough or live handoff session Deliverable: A clear handoff package that lets you or your dev team move forward confidently.

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