Senior Backend & AI Integration Engineer

Senior software engineer and independent consultant with over 15 years of experience, specializing in backend development with Python (Django, FastAPI, Flask) and PHP (Laravel, Drupal). Proficient in API development, data pipelines, and AI integration features including RAG, LangChain/LangGraph, and vector databases. Possesses strong infrastructure and operations skills (Docker, CI/CD, Kubernetes, Linux). Comfortable owning projects end-to-end and mentoring. Seeks remote-only work with a reliable 4-hour daily overlap with US business hours. Handles invoicing and tax administration. Holds work authorization in US (SS/EIN) and Spain (NIE). Spanish availability is limited due to DNV limitations of no more than 20% revenue sourced from Spanish companies.