c
crazyfreeman

Vitaly

@crazyfreeman

App Developer

Canada
English, Ukrainian, Russian
About me
I develop real fintech applications with proper backend architecture, not just UI screens. I specialize in payment and wallet systems with ledger-based balances, transaction history, and scalable APIs. I build mobile apps and secure backends, integrate payment gateways (Stripe, PayPal, Wise-ready), and design KYC-ready architectures for future compliance. I focus on clean, production-ready code and honest technical guidance.... Read more

Skills

c
crazyfreeman
Vitaly
Offline • 

See my services

Cross-Platform Development
I will develop a scalable fintech app with wallet and payment backend
From$800 / projectMore details
Bug Fixes
I will fix stripe payment errors, webhooks, and failed charges
From$40 / projectMore details

Work experience

Upwork

Fintech App Developer (Independent)

Upwork • Freelance

Jan 2024 - Present • 2 yrs 4 mos

• Designed and developed fintech-ready mobile applications with secure backend services • Built ledger-based wallet and transaction systems • Integrated payment gateways and payout flows • Designed scalable APIs and admin dashboards • Helped founders turn fintech ideas into real, working MVPs