Lead Software Architect | The Greek Community of Alexandria / Independent | 2015 – Present

Executive Summary & Architectural Context

Engineering lead for the digital transformation and infrastructure modernization of institutional archives, public service portals, and digital publication systems for The Greek Community of Alexandria (NGO). Re-engineered legacy web systems into a high-availability, scalable Content Management System Architecture designed to support multilingual content workflows, structured historical asset archiving, and secure public communication pipelines.

The engagement established an modernized enterprise architecture framework ensuring strict uptime availability, low latency content delivery, and robust data isolation for administrative workflows.

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Technical Stack & Infrastructure Specification

• ->Programming Languages: PHP 8.x, Modern JavaScript (ES6+), SQL (ANSI standard), HTML5/CSS3
• ->Frameworks & Application Core: Content Management System Architecture, Block-Native Ecosystems, RESTful API Interfaces
• ->Infrastructure & Cloud Operations: Linux (Ubuntu Server LTS), NGINX HTTP/Reverse Proxy, Cloudflare Edge CDN, Systemd Process Management
• ->Data Layers & Caching: MySQL 8.0 (InnoDB engine, strict SQL mode), Redis In-Memory Object Cache

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Core Technical Competencies

• ->Institutional Digital Asset Management (DAM) Schema Design
• ->Multilingual Database Normalization & Search Optimization
• ->High-Throughput Edge Caching & Static Asset Offloading
• ->CI/CD Pipeline Automation & Infrastructure as Code (IaC)
• ->Role-Based Access Control (RBAC) & Security Hardening
• ->Legacy Data Ingestion, Extraction, and Transformation (ETL)

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Systems Architecture & Engineering Logic

//1. Database Schema & Data Layer Normalization

• ->Relational Structuring: Normalized fragmented legacy datastores into an indexed MySQL schema, decoupling core institutional entity data from dynamic attribute tables to eliminate write-amplification during high-volume updates.
• ->Multilingual Query Tuning: Implemented UTF-8 MB4 collation across all indexed string fields to resolve character encoding collisions between Greek, Arabic, and Latin character sets, optimizing complex multi-table JOIN latency by 45%.
• ->Object Caching: Deployed Redis object caching to intercept recurring database read queries, lowering database connection utilization and ensuring sub-50ms query execution across frequent access paths.

//2. High-Availability Infrastructure & Edge Caching

• ->Reverse Proxy Architecture: Configured NGINX as an edge termination layer with micro-caching (fastcgi_cache) enabled for non-authenticated GET requests, reducing backend application load during peak traffic events.
• ->Global Content Distribution: Integrated Cloudflare CDN edge rules for aggressive static asset caching (CSS, JS, media files), achieving a 99.2% cache hit ratio at the edge and lowering Time to First Byte (TTFB) globally to <120ms.
• ->Transport Security & Hardening: Standardized TLS 1.3 encryption across all host endpoints, implementing HTTP Strict Transport Security (HSTS), automated certificate renewal daemons, and strict Content Security Policies (CSP).

//3. CI/CD & Operational Pipelines

• ->Automated Deployment: Replaced manual transport protocols with automated Git-driven deployment pipelines triggered via encrypted webhook listeners, enforcing atomic release rollouts with zero operational downtime.
• ->Automated Backup & Disaster Recovery: Implemented point-in-time database snapshot pipelines backed by automated off-site storage replication and cryptographic integrity verification routines.

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Quantifiable Engineering & Business Impact

• ->Asset Preservation: Successfully digitized and indexed over 10 years of institutional publication records and executive announcements into a structured, searchable digital repository.
• ->Security Resilience: Zero critical security breaches or unauthorized data mutations recorded across the entire lifecycle of the deployed architecture.

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Edge Cases & Mitigation Strategies

• ->Character Set & Collation Faults: Multi-script inputs (Greek alphabet + Arabic script + English text) previously caused database silent truncations. Resolved by enforcing strict UTF-8 MB4 schema constraints with application-level sanitization layers.
• ->Legacy Media Path Corruption: Ingested historic media archives contained deeply nested, non-standard path conventions. Engineered an ETL Python script to audit, re-map, and normalize physical media locations into structured URI hierarchies with automated HTTP 301 redirection maps.
• ->Zero-Trust Administrative Isolation: Implemented strict Network Access Control Lists (NACLs) and dual-factor authentication layers restricting administrative endpoint access to verified IP ranges, mitigating unauthorized access risks on core operational interfaces.