Job Summary: We are seeking a Senior Full Stack Developer Python + React to design, develop, and maintain AI-driven, product-oriented full-stack applications, integrating into a high-performance team. Key Highlights: 1. Integration into a high-performance team focused on LLM orchestration. 2. Design and maintenance of AI-driven, product-oriented full-stack applications. 3. Promotion of best practices in architecture, testing, CI/CD, and code quality. At KaizenRH, we are looking for a Senior Full Stack Developer Python + React to work within a leading multinational financial and banking software company. Do you master the full development lifecycle and are you already deploying AI agents in production? We are seeking a Senior Full Stack Engineer to transform language models into functional and scalable solutions. We require solid experience in end-to-end architecture and at least one year of hands-on technical experience with frameworks such as LangGraph or similar. You will join a high-performance team focused on LLM orchestration, management of complex state, and modern frontend architectures. Responsibilities Design, develop, and maintain full-stack (frontend + backend) applications oriented toward AI-based products. Build modern, interactive interfaces (React, Next.js, or others) for conversational experiences and AI-assisted workflows. Design architectures for LLM- and agent-based applications. Build and optimize language model interaction pipelines (prompting, evaluation, observability, cost optimization). Integrate language model APIs (OpenAI, Anthropic, Hugging Face, etc.) and cloud services. Implement agent workflows and reasoning chains using frameworks such as LangGraph, LangChain, or equivalents. Design and implement APIs (REST/GraphQL) connecting frontend with AI systems. Develop scalable services using containers and modern deployment practices. Collaborate with data, product, and platform teams to bring AI solutions to production. Promote best practices in architecture, testing, CI/CD, and code quality. Mentor more junior team members. Requirements Solid full-stack development experience (Python + frontend frameworks such as React or similar). Experience building scalable APIs and backend systems. Experience working with language models, LangGraph, LangChain, or similar frameworks. Strong understanding of UX in AI-driven applications (chat, copilots, AI-assisted workflows). Desirable Experience with modern frameworks such as Next.js, Vercel, or serverless architectures. Knowledge of LLM observability (tracing, evaluations, cost monitoring). Experience with vector databases (Pinecone, Weaviate, etc.). Familiarity with agent patterns, tool usage, and memory in AI systems. Benefits Employment relationship and job continuity Comprehensive health insurance (Prepaga) for family members Salary adjustments every three months Remote work for residents of Argentina // Hybrid work is also available. Training Program / Proprietary Platform Discounts at educational institutions English class bonus Discounts at top-tier gym networks Birthday leave day Four personal days per year for administrative procedures Flexible vacation policy Welcome Kit Internet expense allowance Laptop Work Location and Hours: REMOTE, Monday to Friday, 09:00–18:00 hrs. -Requirements- Minimum Education: University degree 5 years of experience Keywords: developer, programmer, senior, sr, financial, company, remote, remote, telework, home