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Vahid R.

Mobile Application Developer
  • Suggested rate
    €125 / day
  • Experience8-15 years
  • Response rate100%
  • Response time1 hour
The project will begin once you accept Vahid's quote.
Location and workplace preferences
Location
Istanbul, Republic of Türkiye
Remote only
Primarily works remotely
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Languages
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Skill set
Vahid in a few words
Senior Mobile Developer | Flutter & Android Specialist
Building Scalable Apps for Startups & Enterprises | Agile MVP Expert

8+ years of delivering enterprise-grade mobile apps and startup MVPs with Flutter, Android (Kotlin), and clean architecture. I bridge technical excellence with business goals—whether modernizing legacy systems, launching fintech apps, or streamlining real-time IoT solutions.


Why Clients Choose Me

✅ Full-Cycle Development: From Figma-to-Flutter conversions to App Store deployment.

✅ Startup MVP Pro: Built 15+ MVPs (fintech, SaaS, IoT) with rapid prototyping and scalable foundations.

✅ Enterprise Problem Solver: Upgraded legacy apps (e.g., Fanoos Fintech), achieving 80% crash-free rates and 40% faster launches through optimized architecture.

✅ Agile/Scrum Advocate: Reduced server load by 30% and slashed project timelines by 20% via CI/CD pipelines and TDD.

Technical Expertise

Flutter: 5+ years with Riverpod, Bloc, GraphQL, and Supabase for cross-platform apps (mobile + web).

Android (Kotlin): 8+ years in native development (MVI, MVVM, Clean Architecture) and OS-level integrations (Geofencing, WebRTC).

Backend Collaboration: Firebase, REST APIs, Spring Boot, and custom WebSocket plugins.

Performance Optimization: Cut data transfer by 95% via HTTP caching and reduced power consumption by 80% with native Geofencing.

📩 Ready to build something impactful? Let’s connect!
Experience
  • self-employed
    Freelance Mobile Application Developer
    July 2024 - Today (8 months)
    • Flutter Web App: Designed, developed, and deployed a responsive Flutter web app using GitHub Pages with a custom domain
    • Figma-to-Flutter Conversion: Translated complex Figma designs into perfect Flutter mobile app, resolving challenges in dynamic layouts and animations, cutting design-to-development in 10 to 30 days.
    • Supabase-Powered Backend: Built a Flutter Web app with Supabase for CRUD operations
    • B2B Optimization: Implemented HTTP caching mechanisms (ETag and Last-Modified headers) for optimizing retrieval of low-frequency constants in Flutter application, reducing data transfer by 95% and improving app launch speed by 40%.
    • GraphQL Mobile App: Led Flutter mobile app development with GraphQL, optimizing queries with Apollo caching and batching, improving fetch efficiency by 30% and trimming network calls by 25%.
  • innoscripta AG
    Senior Flutter Developer
    March 2023 - June 2024 (1 year and 3 months)
    Berlin, Germany
    • • Developed a clean architecture boilerplate and reusable components, reducing project startup time by saving 20% of first sprint time.
    • • Replaced traditional location tracking with OS-native Geofencing, reducing power consumption by reducing location checking from 240 request to 2 OS triggers and improving user experience
    • • Created a Flutter plugin for a WebSocket library using Kotlin Multi-Platform, increasing development efficiency by 50% and simplifying troubleshooting.
    • • Reduced server load by 30% through effective query caching in the mobile app.
    • • Published applications: Time Tracker, Email, Calendar and Live Chat apps on AppStore and Playstore
  • raman
    Android and Flutter Team lead
    September 2021 - March 2023 (1 year and 6 months)
    • Collaborate closely with cross-functional teams, leveraging my expertise in back-end development and UI/UX to bridge gaps and deliver high-quality, user-centric applications with seamless new feature integration.
    • Developed MVP of video-call application using WebRTC using native android and flutter.
    • Adopted clean architecture, automated testing and TDD to enhance code maintainability and stability, using Gitlab CI/CD on android and flutter projects for seamless integration and performance monitoring to proactively address technical debt.
    • Enhanced platform performance by implementing Server-Sent Events (SSE) in Flutter and Android to
    • streamline real-time event handling, reducing server load and cutting operational costs by 15% compared to traditional socket methods.
    • Led the development of 3 enterprise applications by effectively applying Scrum methodologies, improving version release cycles and increasing stakeholder satisfaction.
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Education
  • Bachelor
    University of Mazandaran
    2016