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I'm Opeyemi Folarin, a dedicated mobile application developer with over a decade of experience delivering native apps using Swift and Kotlin. My focus is building secure wallets, payments, and blockchain-integrated solutions that feel fast, reliable, and easy to use. I collaborate closely with product, design, and backend teams to ship polished, scalable mobile experiences across iOS and Android, from governance features to regulatory-compliant payments, while mentoring teammates and driving best practices in code quality and performance.…I'm Opeyemi Folarin, a dedicated mobile application developer with over a decade of experience delivering native apps using Swift and Kotlin. My focus is building secure wallets, payments, and blockchain-integrated solutions that feel fast, reliable, and easy to use. I collaborate closely with product, design, and backend teams to ship polished, scalable mobile experiences across iOS and Android, from governance features to regulatory-compliant payments, while mentoring teammates and driving best practices in code quality and performance.

Opeyemi Folarin

App Developer, Web Developer, Full Stack Developer, +5

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I'm Opeyemi Folarin, a dedicated mobile application developer with over a decade of experience delivering native apps using Swift and Kotlin. My focus is building secure wallets, payments, and blockchain-integrated solutions that feel fast, reliable, and easy to use. I collaborate closely with product, design, and backend teams to ship polished, scalable mobile experiences across iOS and Android, from governance features to regulatory-compliant payments, while mentoring teammates and driving best practices in code quality and performance.…I'm Opeyemi Folarin, a dedicated mobile application developer with over a decade of experience delivering native apps using Swift and Kotlin. My focus is building secure wallets, payments, and blockchain-integrated solutions that feel fast, reliable, and easy to use. I collaborate closely with product, design, and backend teams to ship polished, scalable mobile experiences across iOS and Android, from governance features to regulatory-compliant payments, while mentoring teammates and driving best practices in code quality and performance.

Available to hire

I’m Opeyemi Folarin, a dedicated mobile application developer with over a decade of experience delivering native apps using Swift and Kotlin. My focus is building secure wallets, payments, and blockchain-integrated solutions that feel fast, reliable, and easy to use.

I collaborate closely with product, design, and backend teams to ship polished, scalable mobile experiences across iOS and Android, from governance features to regulatory-compliant payments, while mentoring teammates and driving best practices in code quality and performance.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Fluent

Work Experience

Lead Mobile Application Developer at Emurgo Group

August 1, 2025 - August 1, 2025

Led React Native architecture for Yoroi Wallet across iOS/Android, using TypeScript, Redux-Saga, React Query, and Context API to ensure scalable, performant state management. Implemented secure key storage with Keychain/Keystore, biometric authentication, and multi-language support, safeguarding wallets while improving accessibility for global audiences. Delivered staking, token transfers, and hardware wallet compatibility (Ledger/Trezor), expanding Yoroi’s DeFi functionality and strengthening user trust in digital asset management. Integrated governance features including Project Catalyst voting and DRep representation, enabling users to engage with Cardano on-chain decision-making directly from mobile. Maintained native iOS (Swift) and Android (Kotlin) modules for wallet features, improving offline reliability and platform consistency under varying network conditions. Spearheaded mobile delivery for Anzens Wallet, implementing USDA stablecoin minting, KYC/KYB flows, and financial r

Senior React Native Engineer at ClearSky Logic

February 1, 2023 - February 1, 2023

Built healthcare and finance apps using React Native (TypeScript), ensuring GDPR compliance and secure EMR and transaction integrations with encrypted local storage. Implemented biometric login flows with Face ID/Touch ID using native bridges, improving both security and UX across sensitive mobile financial applications. Created reusable UI libraries with React Native Paper, Styled-components, and Storybook, improving consistency and reducing design-to-development turnaround by 30%. Integrated APIs for payments, telemedicine, and insurance, using Axios, React Query, and WebSockets, delivering reliable real-time data experiences. Developed pixel-perfect interfaces with Figma Zeplin handoff, custom themes, and responsive design systems, ensuring accessibility and brand consistency across multiple clients. Optimized app load speed and crash rates using Hermes, Flipper, code profiling, and dynamic imports to boost runtime efficiency. Delivered automated testing frameworks with Jest, React

Mobile Application Developer (Android/iOS) at Intelligent Innovations Co

May 1, 2020 - May 1, 2020

Delivered e-commerce and iGaming apps on iOS and Android, achieving smooth performance and responsive interfaces across multiple devices. Integrated blockchain payment gateways for crypto transactions, meeting AML/KYC standards and building trust in global digital marketplaces. Developed in-app purchases and wallet features supporting multiple fiat and crypto currencies, driving monetization across diverse user segments. Implemented REST APIs and WebSocket connections for real-time gaming, interactive leaderboards, and live betting experiences. Reduced app load times by 30% through code refactoring and profiling, enhancing performance during high-traffic campaigns. Deployed push notifications and deep links to increase retention and drive engagement during marketing events. Partnered with designers to deliver material-compliant interfaces, ensuring cohesive branding and usability. Automated regression and functional testing pipelines, cutting deployment bugs by 25% and improving releas

Mobile Application Developer at Wakanow

February 1, 2016 - February 1, 2016

Assisted in developing Android applications using Java, focusing on UI implementation, feature enhancements, and debugging to ensure smooth app performance and usability. Collaborated with senior developers to maintain and optimize existing iOS apps in Objective-C, fixing crashes, improving load times, and refining user workflows. Participated in daily Agile stand-ups, contributing to sprint planning and retrospectives while ensuring delivery of assigned mobile features on time with quality. Wrote unit and integration tests for core app components, reducing production bugs and increasing reliability across both Android and iOS releases. Supported API integration tasks by consuming REST endpoints, handling JSON responses, and building reusable service modules to connect mobile apps with backend systems. Contributed to UX improvements by implementing responsive layouts, testing designs across multiple screen sizes, and collaborating closely with designers to refine interactions.

Lead Mobile Application Developer at Emurgo Group Singapore (Remote)

August 1, 2025 - August 1, 2025

Led the React Native architecture for Yoroi Wallet across iOS/Android, leveraging TypeScript, Redux-Saga, React Query, and Context API to deliver scalable, high-performance state management. Implemented secure key storage with Keychain/Keystore, biometric authentication, and multi-language support to safeguard wallets while enabling global access. Delivered staking, token transfers, and hardware wallet compatibility (Ledger/Trezor) to extend DeFi functionality. Integrated governance features including Project Catalyst voting and DRep representation, enabling on-device Cardano governance. Maintained native iOS (Swift) and Android (Kotlin) modules to improve offline reliability and platform consistency. Led mobile delivery for Anzens Wallet with USDA stablecoin minting, KYC/KYB flows, and regulatory integrations for institutional-grade compliance. Partnered with BitGo Trust to integrate custody solutions. Introduced automated CI/CD pipelines and end-to-end tests for high-risk crypto flow

Lead Mobile Application Developer at Emurgo Group Singapore (Remote)

May 1, 2023 - January 1, 2026

Led cross-platform mobile architecture for Anzens Wallet and Cardano Spot on iOS, designing shared business logic and domain layers using SwiftUI, with a clear separation between shared code and platform-specific implementations. Implemented secure key storage with Keychain, biometric authentication, and multi-language support to safeguard wallets while improving accessibility for global audiences. Extended Rust-based Cardano transaction signing with a secure FFI bridge to native Swift, enabling deterministic, memory-safe signing while preserving seamless integration with the wallet’s architecture. Delivered staking, token transfers, and hardware wallet compatibility (Ledger/Trezor), expanding Yoroi’s DeFi functionality and strengthening user trust in digital asset management. Integrated governance features (Project Catalyst voting, DRep representation) enabling on-device engagement with Cardano on-chain decisions. Maintained native iOS modules for wallet features, improving offlin

Senior Mobile Engineer at Blusalt Financial Services

June 1, 2020 - February 1, 2023

Designed and developed mobile applications and cross-platform SDKs using Kotlin, Swift, Java, Flutter, and React Native. Built live-ness detection and face comparison SDKs with native integrations, leveraging advanced camera, media processing, and real-time validation capabilities. Led fintech SDK integration for secure, reliable checkout experiences and third-party payments. Built digital identity solutions leveraging blockchain concepts, ensuring secure identity verification and data integrity. Collaborated with UX/UI, QA, and product management to deliver high-quality, user-centric mobile solutions. Contributed to Agile/Scrum processes, code reviews, and technical documentation to guide architecture and SDK usage. Mentored junior engineers on mobile architecture, SDK development, and production-grade coding standards. Improved offline reliability and platform consistency under varying network conditions, and drove performance improvements and secure coding practices.

Mobile Application Developer (Android/iOS) at Intelligent Innovations Co

May 1, 2016 - May 1, 2020

Delivered e-commerce and gaming apps on iOS and Android, achieving smooth performance and responsive interfaces across devices. Integrated blockchain payment gateways for crypto transactions, meeting AML/KYC standards and building trust in global digital marketplaces. Implemented in-app purchases and wallet features supporting multiple fiat and crypto currencies, driving monetization across diverse user segments. Implemented REST APIs and WebSocket connections for real-time gaming and live dashboards, and collaborated closely with design and backend teams to ensure cohesive, scalable mobile solutions.

Mobile Application Developer at Wakanow

September 1, 2014 - February 1, 2016

Supported Android app development in Java with a focus on UI improvements and debugging to ensure smooth performance and usability. Collaborated with senior developers to maintain and optimize existing iOS apps in Objective-C, fixing crashes and refining user workflows. Participated in daily Agile stand-ups, sprint planning, and retrospectives to deliver mobile features on time with quality. Wrote unit and integration tests for core app components to reduce production bugs and improve reliability across iOS and Android releases.