Senior PHP Fullstack Software Engineer (AR)

About the Role: ThriveCart is the leading no-code sales platform for digital course creators, coaches, and online businesses. We are looking for a strong Senior Full-stack PHP Software Engineer to join our Editor 2.0 team. You will primarily extend and enhance both the backend services and frontend interfaces that power our funnel and onboarding builder. You will be working in a mix of modern (object-oriented PHP, Laravel/Symfony, React) and legacy code, shipping features that matter while helping us incrementally modernize the stack.

What You'll Do

• Extend backend APIs, business logic, and database queries in PHP.
• Build and enhance UI components using React and modern JS.
• Ship features end-to-end: from requirements to production deployment.
• Debug and fix issues in both legacy and modern code, and write automated tests for backend and frontend flows.
• Take ownership of specific backend services, API endpoints, or frontend modules over time.
• Help migrate legacy PHP/jQuery code to modern full-stack patterns.
• Improve performance, reliability, and scalability across the stack.

What You Bring

• 5+ years of professional experience building and maintaining web applications at scale.
• Strong PHP fundamentals: OOP, MVC, Laravel/Symfony or similar frameworks.
• Experience with full-stack development (PHP backend + JS frontend) and comfortable navigating/modernizing legacy PHP codebases.
• Experience with REST APIs, relational databases (MySQL/PostgreSQL), caching systems (Redis), and writing automated tests.
• Familiarity with deployment pipelines, Git, and CI/CD.
• Experience using AI Agents and implementing/building AI tools and Agents.
• Bonus: Experience building SaaS/e-commerce platforms, and familiarity with microservices or cloud infrastructure (AWS, GCP).

Benefits

• 100% remote-first, async-friendly culture based in Argentina.
• Small, autonomous team environment with real ownership of your work.
• Opportunity to have a massive impact on a system serving 65,000+ businesses and generating billions in sales.