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I am a Flutter developer with 3+ years of commercial experience building scalable mobile applications and cloud backends. I have a proven track record of delivering MVPs for US and EU markets that secured funding and scaled to real-world usage. I focus on clean architecture, performance optimization, and rapid delivery, collaborating with distributed teams to ship high-quality software.…

Radosław Soysal

PRO

Full Stack Developer, App Developer, Web Developer, +2

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I am a Flutter developer with 3+ years of commercial experience building scalable mobile applications and cloud backends. I have a proven track record of delivering MVPs for US and EU markets that secured funding and scaled to real-world usage. I focus on clean architecture, performance optimization, and rapid delivery, collaborating with distributed teams to ship high-quality software.…

Available to hire

Warsaw, Poland

I am a Flutter developer with 3+ years of commercial experience building scalable mobile applications and cloud backends.

I have a proven track record of delivering MVPs for US and EU markets that secured funding and scaled to real-world usage. I focus on clean architecture, performance optimization, and rapid delivery, collaborating with distributed teams to ship high-quality software.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

Polish

Fluent

English

Advanced

Work Experience

Senior Flutter Developer at Codaro (AI-Tech Product)

February 1, 2025 - Present

Architected and developed a cross-platform mobile application using Flutter and Google Vertex AI for automated reporting. Designed scalable back end pipelines on Google Cloud Platform (Cloud Functions, BigQuery) to handle real-time data ingestion and processing. Optimized app performance, reducing load times by 40% through efficient state management and caching strategies. Implemented complex UI designs with custom animations and adaptive layouts for various screen sizes.

Flutter Developer at XPG (Real-time iGaming Platform, Israel/Philippines)

May 1, 2024 - October 1, 2024

Remote collaboration with a distributed international team to build a high-concurrency gaming platform. Implemented complex WebSocket connections for real-time game state synchronization and live data updates. Developed secure payment gateways and robust authentication flows using Firebase. Optimized UI rendering performance to ensure 60 FPS on low-end devices.

Flutter Developer at Riddep (SaaS Productivity Tool)

September 1, 2022 - November 1, 2023

Manually architected and wrote 150,000+ lines of code (without AI) supporting Web, Android, and iOS from a single repository. Built a complex modular onboarding system and custom UI components. Managed full app lifecycle from concept to deployment on App Store and Google Play.

Lead Flutter Developer (Contract) at A-Lunch (Catering Platform, Israel)

October 1, 2024 - February 1, 2025

Designed the entire mobile architecture using Clean Architecture principles to ensure scalability and maintainability. Integrated WhatsApp API for real-time order status notifications, significantly reducing manual dispatcher workload. Successfully managed communication with stakeholders, translating business requirements into technical tasks.

Senior Flutter Developer at Cordaro

February 1, 2025 - Present

Architected and developed cross-platform mobile app using Flutter and Google Vertex AI; built scalable backend pipelines on Google Cloud Functions and BigQuery to handle real-time data ingestion and processing; optimized app performance with efficient state management and caching; implemented complex UI designs with animations and adaptive layouts for various screen sizes; integrated WhatsApp App API and Firestore for real-time data synchronization; supported 200+ US truck drivers with real-time data updates.

Flutter Developer at XP

May 1, 2024 - October 1, 2024

Collaborated with an international team to build a high-availability real-time gaming platform using Flutter; integrated live game state synchronization and secure payment workflows; optimized UI for consistent frame rates on diverse devices; implemented robust live data streaming and responsive UI components.

Flutter Developer (Core Team) at Riddep

September 1, 2022 - November 1, 2023

Architected and implemented a modular Flutter app with 150,000+ lines of code supporting Web, Android, and iOS; built a rich onboarding flow and reusable UI components; led end-to-end app lifecycle from concept to App Store/Google Play deployment; enhanced performance and maintainability.

Flutter Developer at A-Lunch (Catering Platform, Israel)

October 1, 2024 - February 1, 2025

Led remote development team to build a cross-platform mobile app using Clean Architecture principles; integrated real-time order notifications via WhatsApp App API and Firestore; designed scalable API integration; delivered UI/UX with responsive layouts.

Flutter Developer at XPG (Real-Time Gaming Platform, Israel/Philippines)

May 1, 2024 - October 1, 2024

Collaborated with distributed international team to build a high-concurrency gaming platform; implemented complex WebSocket-like real-time state synchronization; built secure payment and authentication flows.