Back End Developer (AI Infrastructure)

About The Role What if the code you write could directly power the AI systems shaping how millions of people interact with technology? We're looking for Back End Developers in Medellín to design, build, and optimize the server-side systems and APIs that drive cutting-edge AI products — from data pipelines and model-serving infrastructure to scalable microservices that handle real-world traffic at scale. This is a fully remote, flexible contract role. Medellín has become one of Latin America's leading tech hubs, and we're looking for talented engineers who want to take their back end skills to the global AI stage. Organization: Alignerr Type: Hourly Contract Location: Remote Commitment: 10–40 hours/week What You'll Do Design, develop, and maintain robust back end services, APIs, and data pipelines Build scalable, high-performance server-side architecture to support AI training and inference workloads Write clean, well-documented, and testable code following engineering best practices Integrate with databases, message queues, cloud services, and third-party APIs Optimize system performance, reliability, and scalability as usage grows Collaborate asynchronously with distributed teams of engineers, researchers, and product leads Troubleshoot production issues, conduct code reviews, and contribute to architectural decisions Work independently on task-based and project-based assignments on your own schedule Who You Are Proficient in one or more back end languages — Python, Go, Java