Looks like you have JavaScript disabled. For the full Twine experience, you will need to re-enable it.

Staff Mobile Engineer with 6+ years of experience building and scaling mobile products, including 4+ years delivering production apps with Flutter and Dart. Strong background in Flutter architecture, BLoC state management, Firebase integrations, native iOS / Android interoperability, and high-performance UI systems. I build and ship features end to end, turn product requirements into polished experiences, and improve app quality and delivery speed in fast-moving teams. Technologies: Flutter, Dart, BLoC, Firebase, REST APIs, WebSockets, iOS (Swift), Android (Kotlin), CI/CD, GitHub Actions, Design Systems, App Performance, Crash Reporting, and scalable solutions in Agile environments.…Staff Mobile Engineer with 6+ years of experience building and scaling mobile products, including 4+ years delivering production apps with Flutter and Dart. Strong background in Flutter architecture, BLoC state management, Firebase integrations, native iOS / Android interoperability, and high-performance UI systems. I build and ship features end to end, turn product requirements into polished experiences, and improve app quality and delivery speed in fast-moving teams. Technologies: Flutter, Dart, BLoC, Firebase, REST APIs, WebSockets, iOS (Swift), Android (Kotlin), CI/CD, GitHub Actions, Design Systems, App Performance, Crash Reporting, and scalable solutions in Agile environments.

Regis Kian

App Developer, Web Developer, Back-End Developer, +2





Staff Mobile Engineer with 6+ years of experience building and scaling mobile products, including 4+ years delivering production apps with Flutter and Dart. Strong background in Flutter architecture, BLoC state management, Firebase integrations, native iOS / Android interoperability, and high-performance UI systems. I build and ship features end to end, turn product requirements into polished experiences, and improve app quality and delivery speed in fast-moving teams. Technologies: Flutter, Dart, BLoC, Firebase, REST APIs, WebSockets, iOS (Swift), Android (Kotlin), CI/CD, GitHub Actions, Design Systems, App Performance, Crash Reporting, and scalable solutions in Agile environments.…Staff Mobile Engineer with 6+ years of experience building and scaling mobile products, including 4+ years delivering production apps with Flutter and Dart. Strong background in Flutter architecture, BLoC state management, Firebase integrations, native iOS / Android interoperability, and high-performance UI systems. I build and ship features end to end, turn product requirements into polished experiences, and improve app quality and delivery speed in fast-moving teams. Technologies: Flutter, Dart, BLoC, Firebase, REST APIs, WebSockets, iOS (Swift), Android (Kotlin), CI/CD, GitHub Actions, Design Systems, App Performance, Crash Reporting, and scalable solutions in Agile environments.

Available to hire

Staff Mobile Engineer with 6+ years of experience building and scaling mobile products, including 4+ years delivering production apps with Flutter and Dart. Strong background in Flutter architecture, BLoC state management, Firebase integrations, native iOS / Android interoperability, and high-performance UI systems.

I build and ship features end to end, turn product requirements into polished experiences, and improve app quality and delivery speed in fast-moving teams. Technologies: Flutter, Dart, BLoC, Firebase, REST APIs, WebSockets, iOS (Swift), Android (Kotlin), CI/CD, GitHub Actions, Design Systems, App Performance, Crash Reporting, and scalable solutions in Agile environments.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Language

English

Fluent

Work Experience

Staff Mobile Engineer at Jahnel Group

February 1, 2025 - Present

Built and shipped production mobile features in Flutter and native platforms, owning implementation from architecture through release and post-launch stability. Architected an In-App Purchase (IAP) orchestration engine for StoreKit 2 and Google Play Billing; eliminated 5 critical race conditions and receipt format mismatches, ensuring 100% transaction reliability across platforms. Led modularization of legacy mobile codebases into reusable Core and Design System packages, reducing duplication and accelerating feature delivery. Developed native VIN and document scanning flows and integrated them into Flutter via a platform bridge for low-latency communication with native SDKs in high-traffic flows. Engineered a reactive local caching and persistence layer to reduce UI jank. Established quality guardrails across testing, analytics, crash monitoring, and CI/CD, helping teams maintain 85%+ test coverage and ship with higher confidence.

Staff Mobile Engineer, Marketplace & Loyalty at Banco Itaú

March 1, 2021 - January 31, 2025

Built and optimized core mobile experiences for a product serving more than 15 million peak active users, with focus on performance, stability, and user experience. Delivered a transparent authentication module in Swift that reduced onboarding drop-off from 75% to below 5% and contributed to a 60% increase in GMV. Introduced Flutter as a scalable mobile solution through a micro frontend MVP, proving model for modular cross-platform feature delivery inside the organization. Established Clean Architecture and standardized UI patterns, raising test coverage from 0% to 60% and reducing production bugs by 70% in one quarter. Resolved high-stakes bottlenecks, including a Silicon MacBook development issue, validating builds to mitigate daily operational losses exceeding $50,000. Enabled Flutter adoption across 1,000+ developers by building CI/CD foundations, shared components, and platform standards for enterprise delivery.

Full-Stack & Strategic Mobile Development at Various Clients

January 1, 2019 - January 1, 2021

Engineered high-performance MVPs across diverse industries, including AgTech, Fintech, Health, and Automotive marketplaces, specializing in rapid product validation and scaling. Delivered 4 production-ready MVPs within 12 months across AgTech, Fintech, and Health sectors by establishing a reusable cross-platform foundation with Clean Architecture that enabled seamless feature expansion and immediate market stability.