🎯 Technology professional with 20+ years of experience in designing, developing, and deploying high-performance web applications

🏗️ Specialized in B2C, ERP, CRM, and complex B2B SaaS platforms, scalable RESTful APIs, and microservices architecture

🔐 Currently building Guardyn - a privacy-focused secure communication platform with E2EE messaging, voice/video calls, and military-grade cryptography

🌟 Passionate about solving complex technical challenges and implementing innovative solutions

🧑‍💻 Experienced in managing technical projects, mentoring junior developers, and collaborating with cross-functional teams

• Design and implementation of scalable and maintainable backend systems
• Expertise in microservice architecture and API design (REST, gRPC)
• Deep understanding of data processing and orchestration tools
• Distributed systems with TiKV, ScyllaDB, and NATS JetStream
• Event-driven architecture and message queuing

• Implementation of end-to-end encryption (E2EE) with Signal Protocol
• X3DH key exchange and Double Ratchet algorithm
• OpenMLS for secure group communications
• Post-quantum cryptography (Kyber + ECDH hybrid)
• Security audit preparation and reproducible builds

• Proficient in modern front-end frameworks (React, Next.js, Flutter)
• Creating responsive and intuitive user interfaces
• Cross-platform mobile development with Flutter (iOS, Android, Web, Desktop)
• Comprehensive approach combining backend and frontend expertise

• Kubernetes-native architecture with k3d/k3s
• Building and maintaining CI/CD pipelines with GitHub Actions
• Infrastructure as Code with Kustomize and Helm
• Secrets management with SOPS and Age encryption
• Container orchestration and service mesh (Cilium)
• Efficient deployment and application management

• Full-stack observability with Prometheus, Grafana, Loki, Tempo
• OpenTelemetry integration for distributed tracing
• Performance monitoring and optimization
• Log aggregation and analysis

• Exploration and integration of AI/ML capabilities
• Experience with LLM, diffusion models, agents
• Prompt engineering for enhanced functionality

• Application of Vipe coding principles
• Strong analytical mindset and problem-solving skills
• Passion for innovation and technical excellence

Privacy-focused secure communication platform with military-grade cryptography

• 🔐 E2EE Messaging: X3DH + Double Ratchet (Signal Protocol)
• 👥 Secure Group Chat: OpenMLS (IETF standard)
• 📞 E2EE Voice/Video: WebRTC with SFrame encryption
• 🛡️ Quantum-Resistant: Kyber + ECDH hybrid cryptography
• ☸️ Kubernetes-Native: Production-grade infrastructure
• 🦀 Rust Backend: Memory-safe microservices
• 📱 Cross-Platform: Flutter clients for all platforms

Backend: Rust, gRPC, TiKV, ScyllaDB, NATS JetStream, Redis, MinIO
Client: Flutter, Dart, WebRTC, WebAssembly, Tauri
Infra: Kubernetes (k3d/k3s), Kustomize, Helm, Cilium, cert-manager
Crypto: libsignal, OpenMLS, X25519, Ed25519, AES-256-GCM, Kyber
Observability: Prometheus, Grafana, Loki, Tempo, OpenTelemetry
DevOps: Nix Flakes, GitHub Actions, Cosign, SOPS, cargo-audit

🔗 View on GitHub

Total Experience: 25+ years
Focused Expertise: 10+ years

Key Technologies:
  - Rust / Memory Safety / Systems Programming: 2+ years
  - Flutter / Dart / Cross-Platform: 2+ years
  - Kubernetes / Cloud-Native Architecture: 10+ years
  - NestJS / Next.js / React: 5 years
  - PostgreSQL / MySQL / Redis: 10+ years
  - ScyllaDB / TiKV / Distributed Systems: 2+ years
  - Python / RESTful API / gRPC: 10+ years
  - TypeScript / TypeORM: 5 years
  - Docker / Kubernetes / DevOps: 10+ years
  - Cryptography / E2EE / Signal Protocol: 2+ years
  - NATS / Event-Driven Architecture: 2+ years
  - Observability / Prometheus / Grafana: 5+ years
  - Nix / Reproducible Builds: 2+ years
  - CI/CD / Git / GitHub Actions: 5-10+ years
  - TailwindCSS: 5 years

Domain Expertise:
  - Secure Communications / E2EE: 2+ years
  - SaaS: 10+ years
  - E-commerce / Marketplace: 10+ years
  - Microservices / Distributed Systems: 10+ years

🇺🇦 Ukrainian - Native
🇬🇧 English - A1 (Beginner, actively improving)

I'm open to collaborating on innovative projects and challenging opportunities where I can leverage my experience as a Software Architect, Full-Stack Developer, or DevOps Engineer.

💬 Ask me about: Microservices, Backend Architecture, Full-Stack Development, DevOps, SaaS Platforms, E2EE, Cryptography, Kubernetes, Rust

🤝 Open to: Interesting projects, technical discussions, and mentoring opportunities