Konstantin Nikolaienko
AI & Full Stack Developer | Next.js, SaaS, Stripe, Automatio
New to Contra
Konstantin is ready for their next project!
Currently building Cryptonix — an AI-powered crypto intelligence platform focused on trading signals, automation, and real-time analytics.
Built with Next.js, Stripe integrations, crypto payments, and modern SaaS architecture.
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Integrated a crypto payment flow using USDT (TRC20) for subscription-based SaaS access inside Cryptonix.
The system includes:
• QR wallet payments
• Crypto subscription handling
• TRC20 network validation
• Secure payment instructions
• Responsive mobile payment UI
• User-friendly onboarding flow
Focused on simplicity, speed, and accessibility for crypto-native users.
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SaaS Authentication & Subscription System
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Built a modern SaaS dashboard with authentication, payment integration, and responsive frontend architecture.
The project includes:
• Secure authentication flow
• Stripe payment integration
• Responsive dashboard UI
• SaaS subscription structure
• Modern Next.js frontend
• Real-time data handling
Focused on performance, scalability, clean UX, and production-ready architecture.
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