Full Stack Web Developer (Brazil only)

Rio de Janeiro , Brazil
contractor Remote

AI overview

Lead the development of a custom, data-driven web application, focusing on both frontend and backend tasks, while ensuring continuous delivery and iterative improvements.

Description

We’re building a custom, data-driven web application that will keep evolving over time. This is a real product/system with database logic, admin workflows, user roles, and ongoing improvements; not a marketing site, landing page, or WordPress project.

We’re looking for a Brazil-based Full Stack Developer (solo or a small team) who can take ownership of delivery, maintenance, and continuous iteration. You’ll work directly with the founder, under NDA, with a long-term collaboration mindset.

Responsibilities

  • Build and evolve a custom web application with both frontend and backend ownership
  • Design and implement APIs, business logic, and database structure
  • Create and maintain admin panels for frequent data entry and updates
  • Implement user authentication, roles, and permissions
  • Improve performance, reliability, and scalability as the product grows
  •  Maintain the existing system: bug fixes, refactors, upgrades, and new features 
  • Propose practical technical improvements (architecture, tooling, security, DX)
  • Communicate clearly: progress updates, tradeoffs, and realistic timelines

What This Is NOT

  • Not a WordPress site
  • Not a short-term freelance gig
  • Not a design-only role

Requirements

  • Based in Brazil (mandatory)
  • Strong experience with both frontend and backend development
  • Experience building web applications with database and admin panels
  • Comfortable working on long-term projects, not one-off builds
  • Able to maintain, improve, and scale an existing system
  • Willing to work under NDA

Nice to have:

  • Experience with SaaS or internal platforms
  • Experience owning projects end-to-end
  • Ability to suggest architecture and process improvements
  • Familiarity with secure development practices (auth, data protection, auditability)

Benefits

  • Long-term collaboration (not a short gig)
  • Direct access to decision-making (work with the founder, fast feedback loops)
  • Flexible engagement model:
    • monthly retainer, or
    • phased delivery (milestones) with ongoing maintenance
  • Opportunity to shape a real system and improve it continuously
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