hannzern

Architected & Standardized Development Frameworks: Established company-wide Flutter standards using the BloC pattern and developed a centralized TypeScript library for the company’s monorepo/microservices architecture, powered 10+ projects and streamlining RPC/API integrations. Web3 & Blockchain Initiatives: Largely contributed to the company’s transition into Web3 by building a Nuxt.js ecosystem integrated with GoEthereum (Geth); engineered complex back office tools for 40+ users featuring real-time gas fee calculations, automated smart contract payouts, and wallet management. Project Recovery & Rapid Deployment: Successfully salvaged the Niffty.com marketplace project after a 2-year vendor failure, refactoring core peer-to-peer hiring functionalities and achieving a full market launch within 3 months of takeover. Automated CI/CD & Security Infrastructure: Modernized mobile deployment by implementing Fastlane and Jenkins on-premise macOS servers; designed a secure, branch-based credential management system using Gerrit to handle Apple certificates across multiple teams.

Advanced Native Integration: Developed high-performance custom video player modules using Swift5 and Kotlin to support advanced gesture-based seeking, bridging them into React Native to overcome existing plugin limitations. Architectural Optimization: Re-engineered existing React Native applications by implementing Redux-Saga, significantly improving state management predictability and team debugging efficiency. Android System Engineering: Designed a persistent Kotlin-based background service to intercept SMS OTPs and sync with merchant backends, ensuring high reliability even when the application was terminated by the OS. Cross-Platform Portfolio Growth: Utilized Unity to customize and rebrand mobile gaming applications for rapid deployment, successfully expanding the company’s official app store profile and market presence.

Full-Stack Lifecycle Management: Owned the end-to-end development of mobile projects (concept to support), delivering cross-platform social media and e-commerce apps using React Native. POS System Innovation: Developed a specialized Flutter POS application featuring automated remote server synchronization and seamless hardware integration with thermal printers. Backend Architecture: Designed and implemented a scalable Laravel backend specifically structured to handle complex multi-level marketing (MLM) hierarchical data and commissions. Agile Collaboration: Provided critical cross-functional support in a lead and development environment, ensuring the timely release and maintenance of high-priority internal and client-facing products.

Developed a full-stack MVP in Ruby on Rails to support a major corporate shift in product direction. Streamlined UI/UX by migrating to Bootstrap and refactoring CSS, reducing technical debt and improving visual consistency. Drove organic traffic growth for Bumbung.co by implementing technical SEO best practices and enhancing on-page performance.