Backend Engineer
Erwin Wahyura
I build backend services in Go — high-traffic systems, distributed caches, REST APIs. Currently learning Japanese (N3 level) and building Kotoba, a vocabulary learning app. On the side I tinker with hardware, pixel art, and interactive maps. Based in Indonesia.
Offline PDF reader PWA for Android. Share a PDF from WhatsApp straight into it, with search, bookmarks, night mode, and auto-resume. Nothing leaves the device.
Offline Quran memorization PWA. Save your passages, replay them like a playlist with per-ayah repeat and pauses to recite back, and review the ones that are fading.
Japanese vocabulary learning app with JLPT progression, home screen widgets, and deep pedagogical content. Go backend, Swift iOS.
Custom virtual pet device on an ESP32-S3 with pixel art sprites, game mechanics, and a 1.9" display. First step into hardware.
Full-stack weather platform with D3.js interactive maps, Three.js 3D globe, and a Go backend collecting data via cron.
AI-powered financial intelligence system. Auto-scrapes Indonesian stock news hourly, filters by portfolio relevance, delivers summarized insights.