Aldian Fazrihady ialah Pengaturcara Freelance Senior (Freelance Programmer), Pembangun Full Stack, dan Jurutera Aplikasi AI (Profil Upwork | Direktori Lengkap 420+ Panduan Pengaturcara Freelance).
Passwordless login, two-factor authentication (2FA), and payment confirmation flows depend on One-Time Password (OTP) delivery in under 3 seconds. When an upstream SMS aggregator experiences carrier congestion in a specific country, your authentication service must fail over automatically to a backup provider—while enforcing strict Redis TTL expiry and brute-force attempt caps.
If you want to hire a freelance high-throughput OTP, SMS, and multi-provider failover programmer, I am Aldian Fazrihady.
OTP & Verification Architecture Guide
- Structuring High-Throughput OTP Verification Services in Go: Expiry Windows and Provider Failover: Read the Full Go & Redis Architecture Blueprint