https://ridwanmuh3.github.io/Recent content on Ridwan - Backend DeveloperAstroen-USTue, 01 Sep 2026 00:00:00 +0000https://ridwanmuh3.github.io/projects/cinx/Tue, 01 Sep 2026 00:00:00 +0000https://ridwanmuh3.github.io/projects/cinx/A seat-level cinema booking system built as a distributed system: five-minute seat holds, asynchronous payments, event-driven ticket issuance, and refunds that follow the money instead of flipping a status flag.https://ridwanmuh3.github.io/blogs/hello-mars/Sun, 02 Aug 2026 08:42:51 +0000https://ridwanmuh3.github.io/blogs/hello-mars/A second placeholder post, so the blog list renders as a list rather than a single row.https://ridwanmuh3.github.io/blogs/hello-world/Sun, 02 Aug 2026 08:38:49 +0000https://ridwanmuh3.github.io/blogs/hello-world/A placeholder post, kept so the blog list and the article page both have something real to render.https://ridwanmuh3.github.io/projects/fndsa-jwt/Wed, 01 Jul 2026 00:00:00 +0000https://ridwanmuh3.github.io/projects/fndsa-jwt/Post-quantum authentication for a Go microservices task API: FN-DSA-512 JWT signing benchmarked with k6. Precomputation cut issuance latency 24.5%, but under stress both methods matched and cryptography stayed below 0.3% of total latency.https://ridwanmuh3.github.io/projects/ecdsa-ml-dsa/Mon, 01 Jun 2026 00:00:00 +0000https://ridwanmuh3.github.io/projects/ecdsa-ml-dsa/Journal article in ULTIMATICS (SINTA 3) and the proof of concept behind it: a hybrid ECDSA and ML-DSA signature scheme for transaction authentication on an Ethereum-compatible blockchain, with post-quantum signing handled off-chain by an oracle.https://ridwanmuh3.github.io/projects/smart-secure-qr/Sun, 01 Feb 2026 00:00:00 +0000https://ridwanmuh3.github.io/projects/smart-secure-qr/Web application securing QR codes and embedded documents with a digital signature and time-based encryption. Each scan verifies where the code originated and rejects it once its validity period has passed.https://ridwanmuh3.github.io/projects/inventory-dashboard/Mon, 01 Dec 2025 00:00:00 +0000https://ridwanmuh3.github.io/projects/inventory-dashboard/Multi-tenant budget and goods management system for a catering kitchen, with 35 REST API endpoints, role-based access control, row-level locking on the finance and raw-material inventory modules, and analytics dashboards.