Andrii I.

I am a Software and Solution Architect with 15+ years of engineering experience, specializing in complex, scalable platforms across Fintech, HealthTech / Medical, Marketplaces, and B2B/SaaS. I help founders and enterprise teams translate complex business ideas into reliable, production-ready system designs and high-performance cross-platform software. Instead of jumping straight into raw code, I focus on the end-to-end architecture - refining requirements, designing clean data flows, and building systems designed for high scale and long-term maintainability. 🎯 Key Areas of Expertise ✔ Solution Architecture & System Design I build rock-solid platform foundations from scratch. From microservices and data pipelines to cloud setups and API contracts, I ensure your system is secure, modular, and built to scale. ✔ Multi-Domain Industry Experience Deep expertise in high-compliance and complex domains: Fintech (payments, ledgers), HealthTech (telemedicine, HIPAA/GDPR-compliant flows), Marketplaces, and enterprise B2B SaaS platforms. ✔ Project Rescue & Technical Audits Stuck with unscalable, buggy, or poorly structured code? I perform deep architectural audits, untangle legacy issues, and rescue failing projects to make them production-ready. ✔ Full-Cycle Cross-Platform & Full-Stack Development Building high-performance Mobile, Web, and Desktop applications with Flutter, paired with robust backends powered by Firebase/Supabase or custom implementation on Node.js, Go, or Python. ✔ Legacy & Enterprise Integrations Seamlessly connecting modern mobile/web clients with complex legacy infrastructure, existing databases, CRMs, and third-party APIs. 🛠 Tech Stack & Architectural Toolkit Architecture & Engineering Practices: Solution & System Design, Domain-Driven Design (DDD), Clean Architecture, Code Audits & Refactoring, Spec-Driven Development (SDD). Frontend & Cross-Platform: Flutter (Mobile, Web, Desktop), Dart, BLoC / Cubit, Monorepo Management (Melos), Native Android/iOS Integration. Backend, Cloud & Databases: Node.js / TypeScript (NestJS). BaaS & Databases: PostgreSQL, Supabase, Firebase (Cloud Functions, Firestore, Security Rules), REST APIs. 💡 Modern AI-Accelerated Workflow: I leverage modern Spec-Driven Development (SDD) to orchestrate AI agents for accelerated development velocity while keeping 100% human architectural oversight over security, code quality, and system integrity.