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I will optimize your app or website performance or fix bottleneck
Mobile app developer
Hi, I’m Tomek — a Full-Stack & Systems Engineer specializing in High-Performance Apps and AI Integration.
I bridge the gap between polished user experiences and deep-level engineering. Whether you ne...
About this Gig
Is your mobile or web app running slowly, freezing, or crashing under heavy load? Poor performance costs users, bad reviews, and real revenue.
I am a Full-Stack & Systems Engineer specializing in performance profiling, low-level optimization, and system architecture. I don't just guess what's wrong. I use profiling tools to pinpoint exact bottlenecks and fix them directly in your codebase.
What I can help you with:
- Performance Profiling: Finding hidden memory leaks, CPU spikes, and slow execution paths.
- Mobile & Web Optimization: Reducing app bundle size, fixing UI re-render issues, and implementing lazy loading.
- Backend & API Speedup: Optimizing slow database queries, caching strategies, and high-throughput logic.
- Code Refactoring: Cleaning up legacy code for better long-term scalability and stability.
Platform:
Cross-platforms
App type:
Native
Frameworks:
Flutter
•
Kivy
•
Jetpack Compose
•
Angular
•
Node.js
Programming language:
C++
•
Dart
•
Java
•
JavaScript
•
Kotlin
Tools:
Flutterflow
•
Android Studio
•
Supabase
FAQ
What information or access do you need to get started?
Depending on the package, I will need access to your repository (GitHub/GitLab/Bitbucket), a description of the current performance issue, and instructions on how to run the app locally or in a staging environment.
Can you optimize apps built with [React / React Native / Flutter / Node.js / Python / C++]?
Yes! I work with a variety of modern tech stacks across web, mobile, and backend. If you have a custom or uncommon stack, feel free to send me a message first to confirm compatibility.
