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Hi, I'm Ren Akio, a mobile application developer specializing in Flutter. I have over 7 years of experience building high-quality cross-platform apps for iOS and Android, and I enjoy turning ideas into beautiful, functional experiences that users love. I'm proficient in Dart and Flutter, with strong problem-solving skills and the ability to work independently or as part of a team. I thrive in fast-paced environments and am passionate about delivering great user experiences with clean, maintainable code.…Hi, I'm Ren Akio, a mobile application developer specializing in Flutter. I have over 7 years of experience building high-quality cross-platform apps for iOS and Android, and I enjoy turning ideas into beautiful, functional experiences that users love. I'm proficient in Dart and Flutter, with strong problem-solving skills and the ability to work independently or as part of a team. I thrive in fast-paced environments and am passionate about delivering great user experiences with clean, maintainable code.

Ren Akio

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

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Hi, I'm Ren Akio, a mobile application developer specializing in Flutter. I have over 7 years of experience building high-quality cross-platform apps for iOS and Android, and I enjoy turning ideas into beautiful, functional experiences that users love. I'm proficient in Dart and Flutter, with strong problem-solving skills and the ability to work independently or as part of a team. I thrive in fast-paced environments and am passionate about delivering great user experiences with clean, maintainable code.…Hi, I'm Ren Akio, a mobile application developer specializing in Flutter. I have over 7 years of experience building high-quality cross-platform apps for iOS and Android, and I enjoy turning ideas into beautiful, functional experiences that users love. I'm proficient in Dart and Flutter, with strong problem-solving skills and the ability to work independently or as part of a team. I thrive in fast-paced environments and am passionate about delivering great user experiences with clean, maintainable code.

Available to hire

Hi, I’m Ren Akio, a mobile application developer specializing in Flutter. I have over 7 years of experience building high-quality cross-platform apps for iOS and Android, and I enjoy turning ideas into beautiful, functional experiences that users love.

I’m proficient in Dart and Flutter, with strong problem-solving skills and the ability to work independently or as part of a team. I thrive in fast-paced environments and am passionate about delivering great user experiences with clean, maintainable code.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Language

Japanese

Fluent

English

Advanced

Work Experience

Freelance Mobile App Developer at Freelancer

April 1, 2022 - December 31, 2022

Developed social apps using Flutter with features such as real-time notifications, crypto cashback (Ethereum), social sharing, and coop browsing. Worked on PeopleTail Reward for Android and iOS.

Flutter Developer at Venture GO

April 1, 2022 - December 31, 2022

Developed a Jobs Matching App using Flutter, including notification, chat, meeting schedule, and a matching system.

Flutter Developer at CHARLi Health

April 1, 2022 - December 31, 2022

Built Charli, a cross-platform women’s health and cycle-tracking app using Flutter. Implemented period tracking, symptom logging, AI-driven insights, subscription management, and secure telehealth integration. Integrated backend services with NestJS/TypeScript, Firebase, Apple In-App Purchases, PostgreSQL, and OpenAI for AI-driven health insights.

Flutter Developer at Remote

May 1, 2023 - Present

Development of Smart Contract related features for NFT Marketplace, NFT Mint, IDO Pool, Token Swap, NFT Staking, and Token Staking. Implemented multi-signer security and contributed to backend/frontend service development.

Full-Stack Developer at Suena (IT development company in Japan)

December 1, 2013 - April 1, 2018

Full-time development work including porting apps to Flutter (2019) and implementing features across Android/iOS platforms; user authentication, real-time chat, and messaging enhancements.

Mobile App Developer at Suena / Secret Chat

March 1, 2014 - June 1, 2020

Contributed to Secret Chat for Android and iOS; implemented user authentication with Firebase, real-time database features, and secure messaging improvements.

Fastap Developer at Fastap

June 1, 2020 - January 31, 2022

Built foundations for detecting risky products at the purchase stage using barcode scanning, enabling fast search across large databases and real-time data synchronization. Worked on automated pricing for Amazon products.

Senior Mobile App Developer at Pop Sicle

May 1, 2018 - April 30, 2022

Led Flutter-based app development to support Amazon sellers from sales to account health; contributed to rapid growth and improved user experience.

Full-Stack Blockchain Developer at Catheon Gaming

May 1, 2022 - May 31, 2023

Contributed to Play-and-Earn and blockchain gaming initiatives; collaborated on backend and frontend components for blockchain-powered games; helped grow user engagement and sales.