Samuel Effiong

Full-stack engineer with 3+ years of experience building and shipping production web applications independently from database design through cloud deployment. Specialized in Django/DRF SaaS architecture, payment infrastructure (Paystack & Stripe), async background processing, and scalable REST APIs. Focused on scalable SaaS systems, backend architecture, and production deployment workflows.

Full-Stack Engineer, Freelance - Self-Employed - Remote

(2023-01)

Sole engineer across backend, frontend, APIs, and cloud infrastructure, taking products from schema design to production deployment.

• Built 40+ REST API endpoints powering inventory, billing, POS, CRM, and reporting workflows across a multi-tenant SaaS serving isolated business accounts within a shared application environment.
• Integrated Paystack subscription billing end-to-end: plan creation, webhook verification, payment confirmation, grace-period enforcement, and upgrade/downgrade flows.
• Implemented Celery + Redis async processing for automated notifications, scheduled report generation, and payment retry workflows, eliminating manual follow-up on failed transactions.
• Deployed full production stack across Render (API), Railway (workers), and Vercel (frontend) with Docker containerization, environment-based configs, and Cloudflare DNS caching.
• Delivered a second production project: a freelancer client management platform with Stripe billing, invoice generation, and multi-role authenticated dashboards.

Diploma - Web Design - HIIT Institute (2022)

Certificate - Python Programming - HIIT Institute (2022)

Certificate - Django Framework - HIIT Institute (2023)