Specializing in Secure SystemsAccepting new clients

Nathan Van Kempen

Systems Engineer

Building secure, scalable systems—from zero-knowledge applications to HIPAA-compliant infrastructure.

Nathan Van Kempen
Luvero

Software Engineer · Dec 2024–present

Luvero

Designed and built a production-ready, zero-knowledge task management application with military-grade end-to-end encryption. The system ensures complete data privacy through client-side cryptography where passwords, encryption keys, and task data never reach the server in plaintext.

Key Highlights

  • Server never sees plaintext data—true zero-knowledge architecture
  • 5-layer key hierarchy with Argon2id, HKDF, and AES-256-GCM encryption
  • X25519 sealed-box PKI for secure team invitations with forward secrecy

Lead Infrastructure & Data Engineer · Aug 2024–present

Legara

Architected complete healthcare infrastructure from scratch: HIPAA-compliant cloud architecture (AWS, ERP, ETL) and enterprise network (dual-WAN, VPN, IPsec, 5+ isolated zones). Achieved 99.9% uptime with self-healing automation and zero manual intervention during failures.

Key Highlights

  • 99.9% uptime with self-healing automation and <60s recovery
  • Complete infrastructure: HIPAA cloud (AWS, ERP) + network (dual-WAN, VPN, IPsec)
  • 5+ isolated network zones with zone-based firewalls for healthcare compliance
Legara
Financial Engineering Firm

Lead Data Engineer · Oct 2024–present

Financial Engineering Firm

Developed a comprehensive ledger management system to manage financial data for multiple clients with uniform data storage, automated data processing, and enhanced reporting capabilities.

Key Highlights

  • Multi-client ledger system with unified data pipeline and reporting
  • Automated data transformation from multiple financial institutions
  • Significantly reduced manual processing time through intelligent automation

Additional Work

Web design and development projects for aviation and hospitality clients