React Native specialistRemoteFixed-price debugging
Stuck on a React Native bug?
I diagnose and fix difficult React Native and Expo issues — Android, iOS, native modules, builds, upgrades and CI/CD.
Send me the error and I'll tell you whether I can fix it.
> Task :app:mergeReleaseNativeLibs FAILED
2 files found with path
'lib/arm64-v8a/libc++_shared.so'
FAILURE: Build failed with an exception.
Bug fixes from $150
The situation
Some React Native bugs are not worth losing two days to.
You know the pattern. The stack trace points nowhere useful. The fix that worked for someone in 2022 does nothing. You start deleting node_modules for the fourth time.
It works locally. Release builds fail.
Debug runs fine. The release build dies in Gradle or in the archive step, with an error that names a file you never touched.
Expo prebuild suddenly breaks.
One dependency bump later, prebuild rewrites your native folders and the app no longer compiles. Now you own a config plugin problem.
Gradle and Xcode errors make no sense.
Duplicate classes, missing symbols, mismatched deployment targets, a Kotlin version conflict three levels deep in a transitive dependency.
A native module crashes on one platform only.
Android is fine, iOS crashes on launch. Or the other way around. The JS is identical, so the cause is under it.
An upgrade turns into a dependency chain.
You bump React Native. Then Reanimated. Then the Gradle plugin. Then something needs a peer version that does not exist yet.
Claude or Codex gave you a fix. It didn't help.
The patch looked reasonable, applied cleanly, and changed nothing. The real cause was somewhere the model never looked.
None of this is a sign that you're a bad developer. These bugs live in the gap between JavaScript and the native build systems, and that gap is where I spend my time.
Scope
What I fix
Most of the work falls into these areas.
Android & Gradle
Build failures, duplicate classes, AGP and Kotlin version conflicts, ProGuard/R8 issues, signing.
iOS & Xcode
Pod install failures, linker errors, archive and signing problems, deployment target mismatches.
Expo & Prebuild
Broken prebuild output, config plugins, EAS Build failures, moving between managed and bare.
Native Modules
Autolinking problems, modules that only break on one platform, bridging and TurboModule issues.
React Native Upgrades
Version bumps, New Architecture migration, dependency chains that will not resolve.
Hermes & Reanimated
Worklet errors, bundler and engine mismatches, crashes that only appear in release builds.
CI/CD
Pipelines that pass locally and fail in CI, caching problems, EAS, Fastlane, GitHub Actions.
Production Crashes
Reading real crash reports, mapping obfuscated stack traces back to source, finding the actual trigger.
Process
How it works
- 01
Send the problem
Send the error, the logs, the repository or just a description. Whatever you have is enough to start.
- 02
I investigate
I reproduce the issue, identify the root cause and implement the fix.
- 03
You get an unblocked app
You receive the fix and an explanation of what caused the problem.
About me
React Native engineer who enjoys solving the hard bugs.
I'm Mykhailo, a React Native engineer with 8 years of experience in IT and 5+ years focused on React Native and mobile engineering.
I've worked on B2C and B2B products in travel, video surveillance and fitness, supporting apps used across 37 countries, and built features that thousands of users rely on every day.
Over the years, I've spent a lot of time solving the problems that are hardest to debug in React Native: iOS and Android crashes, Gradle and Xcode issues, native modules, dependency conflicts, React Native upgrades, CI/CD and production bugs.
I also use tools like Claude Code and Cursor in my workflow. They help me investigate and move faster, but I always verify the result against the real application, native environment and build system.
When a React Native problem is blocking your project, my goal is simple: find the root cause, fix it, and get you moving again.
- 8 years in IT
- 5+ years React Native
- iOS + Android
- B2B and B2C products
Things I've fixed
Production bugs
Critical issues in live apps used by thousands of people — crashes, race conditions and memory leaks, tracked down through Crashlytics, Sentry and Grafana.
Native & build issues
Gradle, CocoaPods, Xcode, the Android SDK and native modules. Where a third-party library fell short, I wrote or patched the native code myself.
React Native upgrades
Version bumps that drag the whole dependency tree with them: conflicting peers, breaking changes, and getting iOS and Android compatible again afterwards.
CI/CD & releases
Automated iOS and Android pipelines on GitLab CI, Jenkins and Bitrise, plus the App Store and Google Play problems that only surface at release.
Teams I've worked with
Omio · NetRex · 12Climb
Have a React Native problem you can't get past?
Get help with my bugPricing
Get your project unstuck
From $150/ issue
Simple bugs cost less. Complex native and build issues are quoted before work starts.
Tell me about your bugIf I don't think I can help, I'll say so before you pay anything.
What's included
Root-cause investigation
I find what is actually causing it, not what looks related.
Implementation of the fix
Working code in your project, not a suggestion to try.
Verification
The build runs, or the crash is gone, before I call it done.
Clear explanation
What broke, why it broke, and how to avoid it next time.
Method
Already tried Claude or Codex?
That's fine. I use AI-assisted debugging too. The difference is that I verify the result against the actual project, build system and runtime instead of blindly applying generated fixes.
A generated patch can be correct, plausible but wrong, or correct for a different version of your setup. Telling those apart takes a real build, a real device and someone reading the native output.
FAQ
Questions
What kinds of bugs do you fix?
Build failures, native crashes, Expo and prebuild problems, upgrade breakage, CI/CD failures and production crashes in React Native apps. If it sits between your JavaScript and the native build, it's the right kind of problem.
Do I need to give you access to my repository?
Not always. Many build problems can be solved from the error output, your package.json and the relevant native config files. For harder issues, repository access makes it much faster. A stripped-down reproduction repo also works.
How much does it cost?
From $150 per issue. Small, well-defined bugs sit at the low end. Complex native or build problems are quoted before any work starts, so you always know the price first.
Do you work with Expo?
Yes. Managed workflow, bare workflow, config plugins, prebuild and EAS Build. Moving a project from managed to bare is also a common request.
Can you fix native Android/iOS issues?
Yes. That is most of the work. Gradle and AGP conflicts, Podfile and linker errors, autolinking, signing, ProGuard/R8, and crashes that only reproduce in release builds.
What if you can't reproduce my bug?
I'll tell you. If I can't reproduce it and can't identify the cause from your logs and code, you don't pay for it. Sometimes the outcome is a narrower reproduction and a clear next step instead of a fix.
Contact
Tell me about your bug
Paste the error, describe what you tried, and tell me what changed before it broke. I'll read it and tell you whether I can fix it.
Prefer email? Write to mataleo1212@gmail.com.
Don't spend another day fighting the build.
Describe the problem. I'll let you know whether I can help.