v
vladnegriy

Vladislav N

@vladnegriy

FullStack Developer

Ucrânia
Ucraniano, Russo
Algumas informações são exibidas no idioma inglês.
Sobre mim
Full-Stack Engineer & Founder building end-to-end digital ecosystems, secure marketplaces, and mobile apps using Flutter, Node.js, and PostgreSQL. Expertise: advanced financial architecture (escrow, payment pipelines, billing) and decentralized P2P communication networks. I deliver production-grade solutions from architecture to launch. Want to test it live? Drop me a message for working project demos.... Saiba mais

Habilidades

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vladnegriy
Vladislav N
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Conheça meus serviços

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I will design and optimize database architecture
A partir deUS$ 150 /projetoMais detalhes
Desenvolvimento de Aplicativos Android
I will develop secure autonomous user registration and id systems
A partir deUS$ 250 /projetoMais detalhes

Portfólio

Experiência profissional

Lead Flutter & P2P Systems Architect

Golosnyk Protocol • Freelance

Jul 2026 - Present • 2 mos

Leading the development of Golosnyk, a secure decentralized P2P communication platform. Architecting cross-platform mobile applications using Flutter and Dart, implementing robust end-to-end encryption (E2EE), cryptographic key management, and zero-telemetry node synchronization.

Lead Database Architect & Backend Engineer

Self-Employed / Freelance • Freelance

Apr 2026 - Present • 5 mos

Architecting and building production-grade database schemas, secure financial ledgers, and automated payment pipelines for high-load e-commerce platforms. - Designed robust PostgreSQL database architectures with optimized sharding and transaction safety. - Implemented append-only wallet transaction ledgers for secure, non-custodial balance and settlement management. - Integrated multi-provider webhooks (WayForPay, Monobank, Google Play) with retry-safe execution and cryptographic signature verification.