Hana Widyatari

Frontend Engineer with over 2 years of experience building cross-platform web and mobile applications, proficient in TypeScript, React, React Native, and Vue. Skilled in performance optimization, state management, and observability, with a strong foundation in clean architecture and design systems to deliver scalable solutions.

Junior Frontend Engineer at Broom.id (2024-03 – 2025-04)

• Developed and optimized cross-platform mobile and web applications using TypeScript, React, and React Native, streamlining the full mobile workflow across Android Studio and Xcode with reliable OTA deployments via CodePush and EAS Update.
• Integrated Datadog for real-time observability, structured logging, and performance tracking, resulting in faster bug detection and more controlled production incident response.
• Implemented scalable API integrations and Redux for state management, and delivered a mobile push notification feature using OneSignal that improved real-time KYC status visibility for end users.
• Collaborated with UI/UX teams to build a unified Design System package, reducing cross-team development time and ensuring consistent visual standards across the platform.
• Maintained high code quality with Jest and React Testing Library, achieving a 70% reduction in production bugs, while leveraging AI-assisted tools (Cody, Locofy.ai) to accelerate sprint velocity in an Agile environment.

Software Engineer at Mazecare (2022-10 – 2023-12)

• Developed high-performance healthcare web applications using TypeScript, Vue.js, and Nuxt.js, delivering stable, scalable, and highly interactive platforms that improved overall user experience.
• Led end-to-end development of the inventory and stock management module from scoping to production, enabling real-time tracking and precise inventory control that optimized operational efficiency.
• Integrated WhatsApp Business API to establish a secure, two-way communication channel between patients, providers, and administrators, improving engagement and support responsiveness.
• Built a scalable data management layer using GraphQL and Pinia, and developed a reusable component library that accelerated feature development and ensured UI consistency across the platform.
• Applied performance optimization techniques including lazy loading and code splitting, reducing initial load times and improving overall application responsiveness.

Frontend Developer Intern at Radya Labs (2022-03 – 2022-05)

• Developed and maintained a scalable Customer Management System (CMS) web application using TypeScript, React, and Next.js, ensuring type safety and enterprise-level maintainability across the codebase.
• Implemented Zustand for global state management and Axios for real-time API integration, optimizing data flow and ensuring seamless client-server communication.
• Enhanced application performance through lazy loading and code splitting, resulting in faster load times, while collaborating with cross-functional teams to translate technical specifications into reliable, on-schedule feature releases.

Bachelor of Engineering in Geomatics Engineering - Sepuluh Nopember Institute of Technology (ITS) (2015 – 2019)