NetNodes Platform Development

Role: Freelance Full-Stack Developer & Infrastructure Lead
Client: NetNodes (Access Control Technology)
Duration: Ongoing (2024+)

Project Overview

Leading development on a comprehensive access control platform consisting of 15+ interconnected services. The system provides enterprise-grade access management with hardware device integration, serving organizations requiring secure facility access control.

Technical Architecture

Core Platform

• Multi-service Ruby on Rails ecosystem (Rails 8.0.2) with modern asset pipeline
• Python-based device integration services for hardware synchronization
• TimescaleDB for time-series event data and analytics
• Redis for inter-service communication and background job processing
• Multi-tenant architecture supporting enterprise organizations

Infrastructure & DevOps

• Kubernetes deployment with containerized services
• Ansible automation for infrastructure management and deployments
• GitHub Actions CI/CD pipelines
• Comprehensive testing across unit, integration, and system levels

Major Infrastructure Initiatives

Legacy to Modern Infrastructure Migration

• Led migration from legacy servers to Docker containers across all 15+ services
• Orchestrated containerization strategy ensuring zero-downtime deployment
• Designed and implemented Kubernetes migration from Docker containers
• Planned and executed complex PostgreSQL 11 → PostgreSQL 17 upgrade including TimescaleDB extension migration

Infrastructure as Code

• Authored comprehensive Ansible playbooks for automated deployment and configuration management
• Implemented infrastructure automation covering service installation, updates, and monitoring setup
• Designed deployment pipelines integrating Kubernetes with GitHub Actions

Key Responsibilities

Full-Stack Development

• Design and implement new features across multiple Rails applications
• Build RESTful APIs with OpenAPI specifications
• Develop responsive front-end interfaces using modern Rails tooling

Infrastructure Leadership

• Plan and execute major infrastructure migrations with minimal downtime
• Design containerization and orchestration strategies
• Implement database migration strategies for production systems

System Architecture

• Design service communication patterns and data flows
• Implement background processing systems with Sidekiq
• Optimize database performance and query efficiency

DevOps & Automation

• Maintain and extend Ansible automation for 15+ services
• Configure Kubernetes manifests and service orchestration
• Implement monitoring, logging, and alerting solutions

Integration & APIs

• Generate and maintain client SDKs in multiple languages
• Design API integrations for third-party services
• Implement authentication and authorization systems

Technical Challenges

• Zero-Downtime Migrations: Successfully migrating production systems from legacy infrastructure to modern containerized platform
• Complex Database Upgrades: PostgreSQL 11→17 upgrade path with TimescaleDB extension compatibility
• Service Orchestration: Coordinating deployments across 15+ interconnected services
• Enterprise Requirements: SAML/LDAP integration, compliance, and scalability
• Multi-tenant Data Isolation: Ensuring secure separation of organizational data

Impact

Successfully modernized a complex enterprise platform, transitioning from legacy infrastructure to a fully containerized, orchestrated system. The migrations improved system reliability, deployment speed, and maintenance overhead while maintaining zero downtime for production services.

This work demonstrates expertise in infrastructure modernization, complex database migrations, container orchestration, and enterprise-level system architecture.