SeniorBackendDeveloper

**About us:** At Remote Talent LATAM, we connect top Latin American talent with leading U.S. marketing agencies. We guide businesses and candidates through every step of the hiring process, ensuring the perfect match in skills, culture, and goals. While we’re not direct employers, we act as a trusted partner, bridging the gap between exceptional talent and growing opportunities. **Our Client** Our client is a U.S.-based tech boutique building high-scale custom software solutions for clients across industries. Their current flagship project is a large-scale Shopify integration. The team is small, highly technical, and built on years of working together. They move fast, own their work end-to-end, and expect everyone on the team to do the same. **About the Role** Our client is looking for a Senior Backend Developer to take real ownership of backend systems in a high-throughput, multi-tenant environment. This is a hands-on role at the core of a demanding production system, you'll work across service design, concurrency, database architecture, and Shopify integrations while contributing to an ongoing infrastructure migration from Railway to Azure. Their current backend is primarily Go and TypeScript, but they value engineering fundamentals over language loyalty. If you've built reliable, scalable systems in Go, Python, Node.js, Java, Kotlin, or Rust and you understand what it takes to keep a high-throughput distributed system running, we want to talk to you. **Key Responsibilities** * Design and build backend services, APIs, and async background workers for a high-volume, multi-tenant platform * Own system design decisions and contribute to architecture discussions with a small, senior team * Work directly with Shopify APIs as part of a large-scale merchant integration * Manage and optimize PostgreSQL databases, including connection pooling and query performance * Contribute to the migration of infrastructure from Railway to Azure * Identify and resolve performance bottl