Sajudin Ma'ruf is a Frontend & Mobile Developer building responsive web experiences and useful applications from Deli Serdang, Indonesia.
The profile
I build engaging, functional experiences across web and mobile. My work moves between interface craft, application architecture, and the small details that make software feel considered.
My current practice is rooted in SvelteKit, JavaScript, TypeScript, React Native, and Flutter. I enjoy translating a visual direction into a responsive, useful product.
React Native · Flutter · Dart · JavaScript · TypeScript · Git & GitHub · Responsive Design
Indonesian — native
English — professional
Deli Serdang, Sumatra Utara, Indonesia
Professional record
Jul 2025 – Present
PT Arah Baru Selayar
Translating intricate UI/UX designs into pixel-perfect, responsive SvelteKit interfaces for digital invitations, marketing landing pages, and interactive dashboards. Establishing scalable Flutter foundations with Clean Architecture and Riverpod.
Oct 2023 – Aug 2025
KitaKale ID
Developing and maintaining mobile applications with React Native and Flutter, with attention to navigation, state management, native module integration, and stability.
Jan 2023 – Jun 2023
KitaKale ID
Writing technical and web content with a firm grasp of HTML structure and the ability to explain core JavaScript concepts clearly.
Selected work
Six projects, across web and mobile.
Archive / 2023—present
A modern digital invitation platform built with SvelteKit. Vivnio supports wedding, khitan, birthday, graduation, and other celebration templates with modal-based editing, real-time previews, rich styling controls, optimized font loading, responsive touch support, admin management, payment integration, and multi-domain routing for resellers.
Most finance apps feel like cold, demanding spreadsheets. Bareuang turns that around with Financial Runway: a simple answer to how long your money will last at your current spending pattern. Core financial data stays local on the device. Optional receipt scanning sends photos to Bareuang's proxy and Google Gemini only after consent. Bareuang is guest-only—no accounts, login, cloud sync, or multi-user profiles—and Reset Data clears the app's local data.
An interactive English-learning app for children, built with React Native and Expo. It teaches alphabets, numbers, body parts, and family vocabulary through drag-and-drop, word scramble, selection quizzes, and vocabulary matching. Leaderboards, profiles, text-to-speech, and progress tracking make practice more engaging, powered by Expo Router, NativeWind, Supabase, Expo Speech, Expo AV, and Reanimated.
React Native
Expo
TypeScript
JavaScript
A touch-typing coach that teaches your fingers instead of your eyes. Keycoach guides learners through 13 arcade-style stages, while spaced repetition drills the keys they actually miss.
A media, document, and data converter combining local WebAssembly processing for privacy and speed with cloud-assisted processing for heavier tasks. Built around Clean Architecture, SOLID principles, and a premium user experience.
Contact desk
Open to freelance and remote projects. Send a note, share the context, and I will get back to you.
Svelte
CSS
Shell
PLpgSQL
Kotlin
Jetpack Compose
HTML
Vue
Golang
Docker