Most freelancers build what you spec. I help you figure out what to build, then ship it. I'm a full-stack engineer with 5+ years building SaaS products end-to-end — from architecture decisions to production deployment. At Mekari (Indonesia's largest SaaS company), I co-built an OCR-as-a-service product from zero to 200+ paying companies within six months of launch. At Delegasi (YC S22), I held both the PM and engineering seat simultaneously — user research, PostHog instrumentation, feature prioritization, and full-stack execution. My core stack: Ruby on Rails, Node.js, Go, Vue.js, React/Next.js, PostgreSQL. I've shipped under real production constraints — zero-downtime migrations, async job pipelines, third-party API integrations, CI/CD setup from scratch. I work best with founders and small teams building 0→1 products who want a partner, not a ticket-closer. Async-first by default. You'll get clear written updates without having to chase me for status. Based in Jakarta (UTC+7) — I overlap comfortably with US mornings. AI tools are part of my daily workflow: Claude Code for agentic coding sessions, JetBrains AI for codebase understanding and test generation, GitHub Copilot. I use them to ship faster without cutting corners on quality. Past history on upwork 100% Job Success Score. My UK client's review on my profile describes "strong sense of ownership" and "clean, maintainable code." Check the upwork link at portfolio: aufawibowo.com