Deploy your Kotlin app to Fly.io
Step-by-step deployment help for Kotlin apps on Fly.io. We fix Kotlin-specific deployment issues, configure Fly.io, and get your app live. From $19.
Kotlin issues we fix before deploying
Common Kotlin problems that affect Fly.io deployments.
Coroutine scope mismanagement
Launching coroutines with GlobalScope or unstructured scopes that outlive their intended lifecycle, causing memory leaks and zombie operations.
Null safety bypasses with !!
Using the non-null assertion operator (!!) to force past null checks instead of safe calls (?.) or elvis operator (?:), causing NullPointerExceptions.
Missing lifecycle awareness
Android components that don't respect Activity/Fragment lifecycle, continuing operations after destruction and causing crashes or memory leaks.
Insecure SharedPreferences
Storing authentication tokens and sensitive data in plain SharedPreferences instead of EncryptedSharedPreferences or Android Keystore.
Fly.io deployment issues we check for
Common Fly.io problems that break Kotlin apps in production.
Dockerfile missing or misconfigured
Fly.io requires a Dockerfile for deployment. AI tools that scaffold without one force flyctl to auto-generate a suboptimal Dockerfile that misses build steps.
Volume only available in a single region
Fly volumes are pinned to one region. Multi-region deployments try to access a volume that doesn't exist in other regions, causing crashes.
Machine restarts losing in-memory state
AI-generated apps store session data or caches in memory. Fly machines can restart or migrate, wiping all in-memory state without warning.
Internal DNS resolution failing between services
Services within a Fly organization communicate via <app>.internal hostnames, but AI-generated code hardcodes localhost or public URLs.
Start with a self-serve audit
Get a professional review of your Kotlin project before deploying to Fly.io.
External Security Scan
Black-box review of your public-facing app. No code access needed.
- OWASP Top 10 vulnerability check
- SSL/TLS configuration analysis
- Security header assessment
- Expert review within 24h
Code Audit
In-depth review of your source code for security, quality, and best practices.
- Security vulnerability analysis
- Code quality review
- Dependency audit
- Architecture review
- Expert + AI code analysis
Complete Bundle
Both scans in one package with cross-referenced findings.
- Everything in both products
- Cross-referenced findings
- Unified action plan
100% credited toward any paid service. Start with an audit, then let us fix what we find.
How it works
Tell us about your app
Share your project details and what you need help with.
Expert + AI audit
A human expert assisted by AI reviews your code within 24 hours.
Launch with confidence
We fix what needs fixing and stick around to help.
Frequently asked questions
How do I deploy a Kotlin app to Fly.io?
We handle Kotlin deployments to Fly.io end to end. Start with our code audit ($19) to identify deployment blockers specific to your Kotlin project, then we configure Fly.io, fix issues, and get your app live in production.
What Kotlin issues affect Fly.io deployments?
Kotlin projects commonly have coroutine scope mismanagement and null safety bypasses with !!. On Fly.io, these combine with dockerfile missing or misconfigured and volume only available in a single region to cause deployment failures.
Can SpringCode deploy my Kotlin project to Fly.io?
Yes. We specialize in deploying Kotlin applications to Fly.io. We audit your codebase for Kotlin-specific issues, configure Fly.io correctly, and handle the full deployment so your app runs reliably in production.
What does Kotlin deployment to Fly.io cost?
Our code audit ($19) identifies all Fly.io deployment blockers in your Kotlin project. Full deployment assistance is scoped with a fixed quote after the audit — no hourly billing or surprise charges.
Related resources
Other techs on Fly.io
Deploy Kotlin elsewhere
Need help deploying Kotlin to Fly.io?
Tell us about your project. We'll respond within 24 hours with a clear plan and fixed quote.