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I am a Staff Flutter Engineer with 7+ years of Flutter and 11+ years of mobile development, building mission-critical fintech and payment applications across iOS, Android, and the Web for global markets. I architect embeddable multi-package Flutter SDK ecosystems for financial platforms processing $200M+ in transactions and serving 1M+ users. My work emphasizes security-first mobile development, including KYC, biometrics, HIPAA compliance, and native plugin integration.\n\nI also have experience building Go backends and cross-functional platform products from zero to production. I am passionate about crypto payments and the future of programmable money infrastructure.…I am a Staff Flutter Engineer with 7+ years of Flutter and 11+ years of mobile development, building mission-critical fintech and payment applications across iOS, Android, and the Web for global markets. I architect embeddable multi-package Flutter SDK ecosystems for financial platforms processing $200M+ in transactions and serving 1M+ users. My work emphasizes security-first mobile development, including KYC, biometrics, HIPAA compliance, and native plugin integration.\n\nI also have experience building Go backends and cross-functional platform products from zero to production. I am passionate about crypto payments and the future of programmable money infrastructure.

JHIONAN RIAN LARA DOS SANTOS

Full Stack Developer, Web Developer, Back-End Developer, +4

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I am a Staff Flutter Engineer with 7+ years of Flutter and 11+ years of mobile development, building mission-critical fintech and payment applications across iOS, Android, and the Web for global markets. I architect embeddable multi-package Flutter SDK ecosystems for financial platforms processing $200M+ in transactions and serving 1M+ users. My work emphasizes security-first mobile development, including KYC, biometrics, HIPAA compliance, and native plugin integration.\n\nI also have experience building Go backends and cross-functional platform products from zero to production. I am passionate about crypto payments and the future of programmable money infrastructure.…I am a Staff Flutter Engineer with 7+ years of Flutter and 11+ years of mobile development, building mission-critical fintech and payment applications across iOS, Android, and the Web for global markets. I architect embeddable multi-package Flutter SDK ecosystems for financial platforms processing $200M+ in transactions and serving 1M+ users. My work emphasizes security-first mobile development, including KYC, biometrics, HIPAA compliance, and native plugin integration.\n\nI also have experience building Go backends and cross-functional platform products from zero to production. I am passionate about crypto payments and the future of programmable money infrastructure.

Available to hire

I am a Staff Flutter Engineer with 7+ years of Flutter and 11+ years of mobile development, building mission-critical fintech and payment applications across iOS, Android, and the Web for global markets. I architect embeddable multi-package Flutter SDK ecosystems for financial platforms processing $200M+ in transactions and serving 1M+ users. My work emphasizes security-first mobile development, including KYC, biometrics, HIPAA compliance, and native plugin integration.\n\nI also have experience building Go backends and cross-functional platform products from zero to production. I am passionate about crypto payments and the future of programmable money infrastructure.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Work Experience

Principal Mobile Engineer at Dentix.ai

June 1, 2025 - Present

Architecting a HIPAA-compliant, offline-first healthcare AI platform with background data sync, local persistence, and on-device ML inference — processing polygon-based predictions with coordinate normalization and oriented bounding boxes across multiple imaging modalities.

Co-Founder & Principal Software Engineer — Flutter & Go at Akatan

June 1, 2024 - Present

Full-stack ownership: Co-founded and built an industrial safety compliance platform — Flutter app (iOS, Android, Web), admin dashboard, and Go backend from zero. Real-time sync implemented with Supabase Realtime for instant field-to-dashboard updates. Compliance engine automated validation across 9 Brazilian regulatory norms (NR10–NR35). Offline-first persistence with Drift, background sync, and conflict resolution. Established CI/CD pipelines, automated testing, and scalable database schema for rapid data ingestion from multiple sites.

Lead Flutter Engineer — Fintech Platform at Make · letsMake.com

May 1, 2022 - December 1, 2024

SDK architecture: Designed and built a custom Dart/Flutter SDK that abstracts financial APIs. Monorepo-based multi-package Flutter app suite (iOS, Android, Web) for a virtual banking platform with high transaction volume. Led the rapid delivery of the 'Cash Advance' MVP in 15 days, enabling 100K+ user acquisitions and initial volume of $2M. Implemented deep linking and payment flows; owned CI/CD for App/Play/Web releases; managed a 3-engineer Flutter team.

Flutter Engineer — Financial Services at The Bridge (Grace Kennedy engagement)

February 1, 2021 - May 1, 2022

Developed mobile financial services supporting $19B+ USD in quarterly revenue, including remittance and payments for unbanked international populations. Built native plugins for KYC, facial recognition, document screening, and biometric authentication. Led architecture and testing for a 24-engineer Azure DevOps team; implemented lint gates and coverage thresholds; produced public releases.

Shipped GK One on Google Play — Flutter Specialist at Materialize.pro

December 1, 2020 - February 1, 2021

Launched GK One on Google Play; delivered a Flutter-based payments app with KYC integration and platform-specific optimizations; contributed to architecture and testing.

Flutter Developer / Consultant at Ubanquity System

April 1, 2020 - December 1, 2020

Drove digital transformation for traditional banks with scalable Flutter architecture, KYC, biometrics, and registration flows; delivered full application in 3 months with a 16-engineer team; established BLoC + MVC architecture for high-confidence testability.

Flutter Senior Engineer at Brev

February 1, 2019 - April 1, 2020

Early Flutter adopter (Flutter 1.x) and MVP developer; launched 2 mobile apps and a web app for event venue accessibility; contributed to open-source projects including get_it, a widely used dependency-injection library.

Android Developer at PlugApps / Devmaker Mobile Apps

April 1, 2018 - May 1, 2019

Refactored a monolithic Android project to improve maintainability and test coverage; led client delivery across iOS and Android apps.

Full-Stack Developer at Renamar

April 1, 2015 - April 1, 2018

Delivered multiple client projects with Go and Node.js backends and native Android (Kotlin) and iOS (Swift) mobile clients.