Contract: Senior AI Engineer at Upwork

This role is designed for a Senior Software Engineer who has transitioned into the AI space, specifically focusing on the "production hardening" of LLM applications. You are the right fit if you have deep experience in Python and distributed systems, but also possess the specialized knowledge required to move AI from a "cool demo" to a reliable enterprise tool. This includes expertise in Natural Language Query (NLQ) accuracy, semantic modeling, and building automated evaluation pipelines. A standout aspect of this engagement is the opportunity to work within Upwork's Hybrid Workforce Solutions (HWS) team. While the role is fully remote (specifically targeting talent in Latin America), you will be contributing to core, high-impact AI agents and "talk-to-data" experiences that power a major global marketplace. It’s an ideal position for someone who enjoys the intersection of system architecture, CI/CD, and advanced LLM evaluation techniques. **You might be a good fit if you...** * Have a strong software engineering foundation in Python and building scalable APIs. * Are obsessed with AI evaluation metrics like precision/recall and semantic correctness. * Have worked with ontologies, knowledge graphs, or structured data to improve LLM outputs. * Thrive in remote environments and are located in Latin America.