We are seeking a Senior Python Backend Developer to build robust AI-powered API services and agentic workflows, focusing on language model interaction with internal systems, vector databases, and external tools via orchestration frameworks. The idóneo candidate will treat LLMs as components in a secure, scalable distributed system, owning API contracts and service reliability end-to-end.ResponsibilitiesDesign and build backend API services and LLM orchestration layersImplement and maintain complex RAG pipelines, including document ingestion, chunking, embedding, and retrieval optimizationDevelop and connect agent tools using orchestration frameworksEnsure security, privacy, enterprise-grade observability, and test coverage for all backend workflowsContribute to architecture decisions and engineering standards within the podCollaborate with frontend engineers, data engineers, and infrastructure teamsOwn API contracts and service reliability end-to-end, ensuring AI edge cases fail gracefullyIntegrate LLMs using rigorous systems engineering, incorporating evaluation, observability,



fallback handling, and cost awarenessBuild reliable, reusable orchestration frameworks and logic for downstream developer consumptionRequirements3+ years of backend engineering experience, focused on microservices and distributed systemsProficiency in Python for high-performance backend services and cloud-native APIsFamiliarity with AWS, Docker, and ECS/EKSKnowledge of RESTful APIsBackground in secure coding practices and strong auth/authz fundamentalsEnglish proficiency at B2 level or higherNice to haveShowcase of hands-on experience with AI SDKs (OpenAI, Anthropic/Claude, AWS Bedrock, or equivalent) in productionPractical experience with vector databases (Amazon Kendra, OpenSearch), embedding strategies, and retrieval systemsHands-on experience with LangChain, LlamaIndex, or LangGraphFamiliarity with AI evaluation tooling or real-time APM (LangSmith, Langfuse, Arize)Skills in React and Type

📌 Senior Python Developer, Backend (Colombia)
🏢 EPAM Systems
📍 Colombia