Building a Secure, Cost-Efficient Authentication System for Millions of Users

When a ride-hailing app’s daily logins soared to 12 million, SMS-based authentication became unsustainably expensive. The engineering team rebuilt the system with multi-channel login options — SMS, voice, WhatsApp, Facebook, and Google — tailored by re…


This content originally appeared on HackerNoon and was authored by Nurislam Alimov

When a ride-hailing app’s daily logins soared to 12 million, SMS-based authentication became unsustainably expensive. The engineering team rebuilt the system with multi-channel login options — SMS, voice, WhatsApp, Facebook, and Google — tailored by region. By keeping funnels intact, simplifying architecture, and strengthening security (6-digit codes, device fingerprinting), they reduced authentication costs dramatically, maintained conversion rates, and scaled safely across 40 countries. The result: millions saved, lower fraud, and a faster, more user-friendly login experience.


This content originally appeared on HackerNoon and was authored by Nurislam Alimov


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Nurislam Alimov | Sciencx (2025-11-04T21:17:49+00:00) Building a Secure, Cost-Efficient Authentication System for Millions of Users. Retrieved from https://www.scien.cx/2025/11/04/building-a-secure-cost-efficient-authentication-system-for-millions-of-users/

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