This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Sr. Backend Engineer based in Mexico. This role offers the opportunity to build and scale backend systems that power complex booking, payment, scheduling, and customer-facing experiences.You will work primarily with Elixir and functional programming while solving challenging problems across distributed systems and production environments.The position combines strong engineering fundamentals with an AI-first approach to software development and problem solving.You will take ownership of critical product areas and collaborate closely with Product, Design, and Engineering stakeholders.Your work will directly contribute to system performance, reliability, security, scalability, and overall product quality.You will also help shape modern engineering practices by using AI coding tools, evaluating generated code, and developing effective human-agent collaboration patterns.This is an environment for experienced engineers who value autonomy, technical excellence, continuous learning, and meaningful ownership.