We are seeking a Lead Python Backend Developer to deliver secure, scalable AI-driven API services and agentic workflows for LLM integration. You will own API contracts, RAG orchestration, and service reliability across distributed systems, partnering with adjacent teams to keep quality high.ResponsibilitiesDesign and deliver backend API services plus LLM orchestration layersImplement and operate end-to-end RAG pipelines, covering document ingestion, chunking, embedding, and retrieval optimizationDevelop and wire up agent tools using orchestration frameworksEnsure security, privacy, enterprise-grade observability, and test coverage across all backend workflowsDrive architecture choices and help shape engineering standards within the podCollaborate with frontend engineers, data engineers, and infrastructure teams to ship cohesive solutionsOwn API contracts and end-to-end service reliability, ensuring AI edge cases fail gracefullyIntegrate LLMs with rigorous systems engineering, including evaluation, observability, fallback handling, and cost awarenessBuild dependable,



reusable orchestration frameworks and logic for downstream developer consumptionRequirementsProven backend engineering background with 5+ years of experience in microservices and distributed systemsHigh proficiency in Python for performant backend services and cloud-native APIsHands-on familiarity with AWS, Docker, and ECS/EKSSolid understanding of RESTful APIs and API design principlesStrong foundation in secure coding practices with clear auth/authz fundamentalsEnglish proficiency at B2 (Upper-Intermediate) level or higherNice to haveProduction experience with AI SDKs such as OpenAI, Anthropic/Claude, AWS Bedrock, or equivalentPractical exposure to vector databases (Amazon Kendra, OpenSearch), embedding strategies, and retrieval systemsHands-on work with LangChain, LlamaIndex, or LangGraphFamiliarity with AI evaluation tooling or real-time APM such as LangSmith, Langfuse, or ArizeSkills in React and Ty

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