Christopher O

WhatsApp POS SaaS Developer

Poikilingo • Freelance

Apr 2026 - Present • 2 mos

Built and actively developing PayQu, a multi-tenant WhatsApp-based Point of Sale (POS) SaaS platform. Integrated DPS payment gateway (MXN) with a Railway-hosted Node.js backend, currently live in production. Designed and implemented merchant onboarding flows including business registration and automated WhatsApp number assignment. Architected a two-tier infrastructure strategy: shared Meta Business Account and WhatsApp Flow for standard merchants, with dedicated Meta infrastructure for white-label clients requiring full branding control. Scoped an AI agent roadmap covering both merchant-facing and internal automation agents. Core stack: Meta WhatsApp Cloud API, Node.js, Railway, DPS Payments. Skills: WhatsApp Business API, Meta Cloud API, Node.js, API Integration, Payment Gateway Integration, SaaS Development, Automation

AI Automation & WhatsApp API Developer

BHA Consulting • Freelance

Feb 2026 - Feb 2026 • 0 mos

Built and deployed end-to-end automation systems for businesses using AI tools and messaging APIs. Specialized in WhatsApp Cloud API, Make.com workflows, and AI-powered customer support and sales agents. Designed automation pipelines integrating CRMs, databases, and AI models to improve lead response time, customer engagement, and operational efficiency. Worked on voice AI systems using tools like Vapi and ElevenLabs to build real-time conversational agents. Key achievements include: - Developed WhatsApp automation systems for lead capture, follow-up, and customer support - Built AI agents connected to knowledge bases and product catalogs - Integrated Make.com workflows with CRMs and external APIs - Reduced manual response time by automating customer interactions - Debugged and optimized slow or failing automation flows