Full StackEngineer& System Architect.
Building secure, AI-native SaaS platforms with Next.js 15 and Python.
I architect zero-knowledge platforms and secure web applications.
Next.js 15 | TypeScript | AES-256 | AI Integration
Full StackEngineer& System Architect.
Building secure, AI-native SaaS platforms with Next.js 15 and Python.
I architect zero-knowledge platforms and secure web applications.
Next.js 15 | TypeScript | AES-256 | AI Integration
Technology Stack
Engineering for Security, Scale, and Speed.
I am a Product-Focused Full Stack Engineer based in Jacksonville, FL, with a background in building bank-grade financial infrastructure and AI-native architectures.
My journey has taken me from optimization-heavy backend work to leading frontend migrations for fintech startups in Berlin. I don't just write code; I engineer solutions that solve business problems—whether that's architecting a zero-knowledge secrets manager from scratch or reducing server loads by 20% for high-traffic platforms.
I speak five languages (including German and Ukrainian), which allows me to collaborate effectively with distributed international teams. When I'm not optimizing PostgreSQL queries or building with Next.js 15, I'm likely exploring the latest in AI agents and cryptography.
Professional Journey
From optimization-heavy backend work to leading fintech migrations.
Core Full Stack Engineer
Stealth Startup (Fintech/Security)
Focusing on high-performance frontend architecture and financial compliance.
Lead Product Engineer
Gerfach.com
Architected a zero-knowledge environment variable management platform to solve DevOps security leaks.
Contract Software Engineer
High-Scale Architecture & Data Engineering
Delivered full-cycle engineering solutions for US and EU clients, focusing on backend infrastructure.
B.S. Computer Science
National Aviation University
Focus: Distributed Systems & Network Security.
Want to know more about my background?
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Quick scan for ATS and technical recruiters
Frontend
Backend
Database & DevOps
Security & AI
Featured Work
Demonstrating competence through results.
Gerfach.com – Secure Secrets Manager
DevOps teams suffer from security leaks due to poor environment variable management.
A zero-knowledge platform where the server never sees raw user secrets, built on a "deploy-anywhere" Docker architecture.
Achieved a 95+ Lighthouse performance score by leveraging Server Components to minimize client-side JavaScript.
Financial Intelligence Dashboard
Investment firms needed real-time portfolio analytics with AI-powered insights.
Built a WebSocket-powered dashboard with streaming AI analysis and Stripe integration for subscription billing.
Processing 10,000+ real-time data points per second with sub-100ms latency.
Interested in working together?
Schedule a CallWhat People Say
"Volodymyr delivered exceptional work on our fintech platform. His security-first approach and attention to detail made all the difference."
Michael Chen
CTO, Fintech Startup
Business Solutions
Secure SaaS Development
I architect zero-knowledge platforms and secure web applications using the modern React ecosystem (Next.js 15, Server Actions). My focus is on strict input sanitization, RBAC (Role-Based Access Control), and preventing XSS/CSRF vulnerabilities.
High-Scale Infrastructure
From rescuing bottlenecked PostgreSQL databases to building 12-microservice architectures handling 15,000+ daily requests. I optimize for 99.9% uptime and sub-second response times.
AI & Financial Engineering
Building LLM-powered features, real-time financial dashboards with WebSockets, and Stripe Connect implementations for multi-vendor marketplaces. From idea to production.
How I Work
Communication
Clear, consistent updates in English, German, or Ukrainian. I believe in transparent progress reports and proactive problem-solving.
Code Quality
Strict adherence to WCAG accessibility and Lighthouse performance standards. Every feature is tested, documented, and reviewed.
Security
Security-first mindset with proven experience in RBAC and AES-256 encryption. I treat every project like it handles sensitive data.
Need a PDF version for your team?
Download ResumeGlobal Reach
I am a polyglot engineer capable of working with diverse international teams.
Let's Work Together
Let's Build Something Great
Let's discuss your project, timeline, and how I can help. 30 minutes to explore if we're a good fit.