Hello, I'm Sidney Rees 👋 — I step in when growth stalls, vendors underdeliver, or systems can't scale, and turn CTO-level strategy into PMO-level execution.
21+ years across software development, project management, and digital transformation, working globally (based in Argentina, English & Spanish).
- 🎯 Fractional CTO + PMO leadership for growing eCommerce businesses
- 🏗️ Technology strategy, architecture, and vendor risk management
- 📦 End-to-end product delivery and roadmap execution
- 🚑 Emergency migrations & crisis recovery
- 🤖 Automation & AI-driven operations
- eCommerce Operations
- Business Automation
- AI Agents
- Product Strategy
- Technology Leadership
⚙️ Marketplace automation — Connected Mercado Libre and WooCommerce, automated stock sync, and redesigned the fulfillment workflow, doubling sales from week one and cutting operational workload by 50%. → Read the case study
🚨 Emergency migration & data recovery — Recovered 40,000+ products and 8,000+ customer records from vendor lock-in in 7 days with zero downtime, using custom Python recovery bots and a new WooCommerce infrastructure. → Read the case study
More documented cases: real-cases-and-success-stories
Sidney doesn't just consult on AI and automation — he built the companies that prove it out:
flowchart LR
A["🔵 Sigma Reef<br/>E-commerce AI & Automation"]
B["🟡 Sidney Rees<br/>Authority & Strategy"]
C["🟢 Cadence Ridge<br/>SMB Automation & AI Agents"]
A --- B --- C
style A fill:#2452C4,stroke:#17337a,color:#ffffff
style B fill:#D9A441,stroke:#8a6a1f,color:#111111
style C fill:#14A897,stroke:#0c6359,color:#111111
🔵 Sigma Reef · 🟡 Sidney Rees · 🟢 Cadence Ridge
Three forces. One philosophy: human-centric automation, engineered by Sidney Rees.
→ See it proven in real client engagements — actual numbers, actual outcomes.
More resources
- CTO / PMO eCommerce Playbook → https://github.com/sidneyrees/pmo-ecommerce-playbook
- Tech Radar → https://github.com/sidneyrees/ecommerce-tech-radar
- Automation & AI Agents for eCommerce → https://github.com/sidneyrees/automation-agents-for-ecommerce
- Project Recovery Kit → https://github.com/sidneyrees/project-recovery-kit
- Platforms: Shopify, WooCommerce, Medusa.js, Saleor, AWS
- International team & vendor leadership
- 99% client satisfaction
🌐 sidneyrees.com — book a free 30-minute eCommerce tech diagnostic
📫 Available for fractional CTO+PMO engagements