Full-Stack Developer – Web & Mobile App Development

Filled
February 26, 2026
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Job Description

Type: Freelance / Contract (Upwork)
Budget: $500–$750 per site
Location: Remote

Project Overview:

We are seeking an experienced Full-Stack Developer to build a consumer-facing app similar to MyFitnessPal, including:

  • User accounts & authentication
  • Data tracking & analytics dashboards
  • Scalable backend infrastructure
  • Web & mobile development

Key Responsibilities:

  • Develop full-stack functionality from UI to backend systems.
  • Collaborate with the team on feature planning and execution.
  • Implement custom-built Shopify stores (not theme swaps).
  • Work from Figma or design files to build responsive front-end layouts.
  • Integrate and manage databases (Postgres, MongoDB, etc.).
  • Deliver consumer-facing applications with smooth UX and reliable performance.

Required Skills & Experience:

  • Proven full-stack development experience
  • Strong frontend skills (HTML/CSS/JS/React or equivalent)
  • Backend experience with scalable architectures
  • Shopify development (custom stores)
  • WordPress development experience
  • Database management (Postgres, MongoDB, etc.)
  • Experience building consumer-facing products