Back end developer

Job Title: Senior Software Engineer Location: Brazil, Costa Rica, Colombia Work Mode: 100% Remote Employment Type: Independent Contractor (hourly pay, no benefits; candidate responsible for own taxes) Contract Duration: 6 months, with strong possibility of extension Hours: 40 hours per week About the Role We are supporting a large Vendor Platform Transformation initiative focused on rebuilding vendor onboarding and intake systems. The team manages vendor relations and custom intake workflows for bulk item onboarding. This is a backend-heavy role with approximately 90% backend and 10% frontend work. The primary focus for the next year+ will be Ruby and Elixir systems, though strong backend engineers with experience in Java, Kotlin, C# or Go will also be considered. The team is looking for engineers with strong backend fundamentals, scalable systems experience and solid coding and system design skills who can reliably deliver high-quality software in distributed environments. Responsibil...