Senior AI Engineer (Python/Node.js/React) 100% remote | PJ >>> Only resumes in english please Requirements Upper-intermediate to advanced english ( important ) 5+ years of experience in Python ; Experience with Node.js / Nest.js ; Experience with React ; Experience working with self-hosted models such as Ollama or similar stacks; Experience with prompting, RAG, AI agents, and model integration; Experience building REST APIs; Experience with AWS, Docker, and CI/CD; Experience with Postgres, Redis, or similar databases; Should be available to work Pacific Time (PST) business hours. Nice to have Experience with LangChain / LangGraph; Experience with vector databases; Experience with voice AI, STT/TTS, Twilio, or WebRTC; Experience deploying and optimizing inference workloads. Responsibilities Build applications on top of self-hosted AI models; Develop AI agents and conversational workflows; Work with model orchestration, prompting, and context management; Implement backend services and APIs; Build AI services in Python; Develop frontend interfaces in React; Integrate AI features with internal and external systems; Support deployment and operation of AI services in cloud environments. Work conditions Opportunities to work on diverse and challenging projects; A supportive and collaborative team environment; 12 vacation days per year; 5 sick days per year; English classes; Access to therapist and psychologist support for mental well-being.