HireReady
Overview
AI-powered interview prep SaaS with real-time voice interviews (OpenAI Realtime API), FSRS-5 spaced repetition scheduling, 1,300+ question bank, and company-specific prep tracks for Amazon, Google, Meta, Microsoft, Apple, Netflix, Stripe, and Uber. Gamification, performance analytics, and Stripe subscriptions (monthly, annual, and lifetime tiers).
Challenge
Building a production SaaS with real-time AI voice interviews and scientifically-optimised spaced repetition while preventing financial losses from unlimited usage.
Solution
OpenAI Realtime API for natural voice interviews with post-session analysis. FSRS-5 algorithm (same as Anki) schedules review for 85%+ retention. 1,300+ questions across company-specific tracks. Usage limits per plan prevent cost overruns. Stripe handles monthly, annual, and lifetime billing.
Impact
Live production SaaS generating revenue. 57–77% profit margins. Voice interviews available 24/7 without scheduling. Company-specific prep covers FAANG + Stripe + Uber. FSRS-5 delivers scientifically-optimised review scheduling.