Sinar Setyawan
Fullstack Engineer · Golang, Spring Boot, React · Fintech
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Garasin Mobile – Flutter App for Auto Repair Customers
Customer app for the Garasin platform, built with Flutter and published on Google Play. Customers book workshop service online, track their service status and queue number, view and pay bills via iPaymu (virtual account & QRIS), and find and review nearby workshops. Connected to the same backend APIs that power the Garasin workshop dashboard, so bookings and payments sync in real time with the workshop. Search "Garasin" on Google Play.
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Garasin: SaaS platform for auto repair workshops (founder & fullstack engineer). Workshop owners manage services, spare-part inventory, POS, customer records and financial reports from one web dashboard, with an automated service queue shown live on a TV screen. Customers use the mobile app on Google Play to book service, view and pay bills, and find and review nearby workshops. Integrated iPaymu payments (virtual account & QRIS) with split payments. I own product direction, system architecture, backend APIs, web dashboard, mobile app and deployment. Live at garasin.com:
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Kas RT – Neighborhood Treasury & Resident Dues Management App
A web app that helps neighborhood (RT) treasurers in Indonesia manage community funds and resident dues in one place. Features include a resident registry, monthly billing where unpaid dues automatically carry over and accumulate into each resident's total amount due, a cash-in/cash-out ledger, payment records per community meeting, receivables tracking, a cash denomination calculator for counting notes and coins, and printable meeting invitations showing each resident's outstanding bill. The dashboard shows total balance, income, expenses, receivables, and paid vs. unpaid status for the month at a glance.
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ADIFA – Digital Loan Origination & Credit Analysis for Rural Banks
ADIFA (Digital Financing Analysis App) digitizes the end-to-end loan process for BPRs (Indonesian rural banks) through a role-based, multi-level workflow. Sales officers register prospective borrowers, credit analysts assess each application, branch managers make the credit decision, and the system issues the SPPK (credit approval letter). Head office monitors applications across all branches. Built-in automatic credit calculations include collateral valuation for buildings, vehicles, and land with buildings.
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