Perry's Résumé - Licensing

• C++ (25+ yrs commercial): enterprise-scale systems w/ <1 defect per 10K LOC in production.
• Python (15+ yrs): crypto-licensing (in test), python-slip39, and cpppo modules in wide use.
• Rust (5+ yrs): Holochain distributed system R&D and HoloFuel cryptocurrency prototypes.
• Embedded systems development: RTOS, SIMD, assembly optimization, PCB debugging.

• Creator of crypto-licensing Python module: Ed25519-signed license verification with DNS-based public key distribution (DKIM model), offline license validation, cryptocurrency payment integration.
• Deep cryptographic licensing experience: Public-key infrastructure (PKI), Ed25519 signatures, license server architectures, node-locked and floating license models.
• Security expertise: SLIP-39 Shamir secret sharing, secure communications, PQC, fail-safe auth.
• Reed-Solomon error and erasure recovery C++ module ezpwd-reed-solomon used worldwide by aerospace and military contractors.
• FlexNet-style licensing: Node-locked, floating, and license server architectures through hands-on implementation.

• Service-Oriented Architecture (SOA): SOAP/REST APIs, microservices design patterns.
• Client-server architectures: Multi-tier systems, distributed authentication, session management.
• Decentralized/Distributed systems: CAP/FLP designs, BFT resilience, DHTs consistency.
• Web/cloud-based technologies: RESTful services, cloud deployment, scalable web applications.
• Network protocols: EtherNet/IP, Modbus, SCADA, TCP/IP stack, DNS, HTTP/HTTPS, QUIC, mTLS1.3, WebSockets/WebTransport.
• Authentication Standards: Have implemented WebAuthn, FIDO2 sysstems in various languages.

• Large-scale commercial software development: CI/CD pipelines, code reviews, mentoring
• Quality focus: <1 defect per 10K LOC maintained in mission-critical RTU firmware
• Performance optimization: SIMD (AVX/NEON), lock-free wait-free multithreading, real-time SDR and signal processing.
• DevOps: Linux, Docker, automated testing, version control (Git), deterministic build/deploy (Nix).
• Tools: Git, Docker, GDB, Valgrind, Linux Perf, Static and dynamic analysis

Architected and delivered cryptographic licensing, blockchain, and enterprise software systems.

Licensing & Cryptography Leadership

• Designed and implemented crypto-licensing Python module with Ed25519 cryptographic signatures

  • Secure license verification via DNS TXT records (DKIM-style public key distribution)
  • Offline license validation with signed verification caching
  • Cryptocurrency payment integration (Ethereum Virtual Machine smart contract) for automated license issuance
  • RESTful API for license server operations
  • Production deployment supporting commercial software licensing

• Developed python-slip39: Cross-platform SLIP-39 App for secure BIP-39 seed backup/recovery

  • Advanced cryptographic key management and Shamir secret sharing implementation
  • Multi-platform GUI and CLI tools (Windows, macOS, Linux, iOS, Android)

Enterprise Software Development

• Created cpppo: Industrial EtherNet/IP CIP protocol parser in Python

  • Commercial deployment in industrial automation systems globally
  • Client-server architecture with TCP session management
  • Protocol reverse-engineering and standards implementation

• Developed ezpwd-reed-solomon: High-throughput Reed-Solomon FEC in C++/JavaScript

  • Used by aerospace and defense contractors worldwide
• Mitigated critical security vulnerabilities in major enterprise collaboration suite (global deployment)
• Guide development teams through cryptographic system architecture and secure implementation
• Active contributor to diverse open-source projects across multiple languages

Technical Consulting

• Architected blockchain and IoT systems for energy and fintech clients
• Deployed rugged satellite-connected monitoring and communications systems across Alberta oilfields
• Authored technical articles on distributed systems, cryptography, and industrial communications

Architected and tested novel distributed transaction engine prototypes.

• Designed partition-tolerant mutual credit system with cryptographic finality
• Implemented agent-centric accounting enabling linear O(n) scaling vs O(n²) blockchain bottlenecks
• Validated simultaneous atomic transactions during network partitions
• Contributed to R&D for Holochain's distributed application framework

Replaced expensive custom radio telemetry with commodity hardware and SDR technology.

• Built real-time SDR system for utility meter reading using off-the-shelf CPUs.
• Optimized throughput with AVX/NEON SIMD for 25Msps I/Q multi-channel signal processing.
• Implemented fault-tolerant distributed consensus for partial data collected from multiple samples across lossy RF channels.

Deployed cryptographically secure SCADA communications for critical hydrocarbon pipeline infrastructure.

• Architected fault-tolerant Reed-Solomon encoded multi-route protocol for real-time SCADA

  • Cryptographic integrity across hostile networks
  • Multi-path routing maintaining security during communications failures
  • Still in production operation today across continent-wide infrastructure

• Developed solid-state RTUs for 24/7 pipeline control

  • Maintained <1 defect per 10,000 lines of code in production
  • Controlled $100B+ critical infrastructure
• Deployed hundreds of ruggedized embedded units across remote sites

Re-architected core SCADA automation alarm system component.

• Pioneered DFA state machine-based alarm correlation system for distributed SCADA
• Enabled end-users to configure complex, safety-critical workflows
• System deployed continent-wide in pipeline SCADA systems (30+ years continuous operation)