Job Summary: We are seeking a Senior Python Developer with a focus on backend architectures and AI to develop and optimize solutions using autonomous agents and LLMs, acting as a technical reference and contributing to development standards. Key Highlights: 1. Acting as a technical reference for AI and LLM solutions 2. Developing architectures for autonomous AI agents 3. Strong technical emphasis and contribution to development standards We are specialists in **technological transformation**, combining human expertise with AI to build scalable tech solutions. With over 8,000 CI&Ters worldwide, we have partnered with more than 1,000 clients over our 30-year history. Artificial Intelligence is our reality. **Important**: If you reside in the Campinas Metropolitan Region, your physical presence at our city offices is mandatory, per our current attendance policy. We seek a Senior Python Developer to work with a focus on backend architectures, AI agents, frameworks, and LLM-based solutions. We are building the next generation of agent-based Artificial Intelligence systems through CI&T Flow — our platform that integrates human and AI agents to accelerate productivity, quality, and security in software development. This position carries strong technical weight, serving as a reference for the team and directly contributing to defining standards, best practices, and solution evolution. **Responsibilities** Develop, evolve, and optimize backend solutions using Python. Design and implement architectures for autonomous AI agents, covering the full LLM lifecycle. Implement solutions using prompt engineering, RAG (Retrieval-Augmented Generation), and data vectorization. Participate in defining technical standards, architecture, and development best practices. Ensure quality through automated testing, code reviews, and CI/CD pipelines. Identify and resolve production incidents, including root cause analysis. Collaborate with multidisciplinary teams, maintaining clear communication with stakeholders. Produce and maintain technical documentation for architectures, workflows, and decisions. Act as a technical reference, supporting development and disseminating knowledge. **Requirements for this challenge** Solid and proven experience with Python, with a strong backend focus. Experience in cloud environments and distributed application architectures. Experience with containers (Docker) and CI/CD pipelines (e.g., GitHub Actions). Knowledge of relational and NoSQL databases. Practical experience with prompt engineering (Chain-of-Thought, ReAct, Tree of Thoughts). Experience with RAG and Vector Databases (Pinecone, Weaviate, Chroma, FAISS). Knowledge of fine-tuning and RLHF for model optimization. Ability to work autonomously, with systemic vision and problem-solving focus. Experience with Git and agile methodologies. **Differentiators** Prior experience with autonomous agent architectures or LLM orchestration. Experience with agent frameworks (LangChain, LlamaIndex, Semantic Kernel, CrewAI, LangGraph). Experience with observability applied to AI solutions. Work on internal technology products or platforms. Ability to translate complex technical challenges into practical, scalable solutions. #LI-JC4 **Our benefits:** * Health and dental insurance; * Meal and food allowance; * Childcare assistance; * Extended parental leave; * Partnerships with gyms and health & wellness professionals via Wellhub (Gympass) TotalPass; * Profit and Results Sharing Program (PLR); * Life insurance; * Continuous learning platform (CI&T University); * Discount club; * Free online platform dedicated to promoting physical, mental health, and wellbeing; * Pregnancy and responsible parenting course; * Partnerships with online course platforms; * Language learning platform; * And many more More details about our benefits here: https://ciandt.com/br/pt-br/carreiras At CI&T, inclusion starts from the first contact. If you are a person with a disability, it is important to **submit your medical report during the selection process.** *Check which data must be included in the report by clicking here.* This way, we can ensure the support and accommodations you deserve. **If you don’t yet have the qualifying medical report, don’t worry: we can support you in obtaining it.** We have a dedicated Health and Wellness team, inclusion specialists, and affinity groups who will accompany you throughout every stage. Count on us to walk this journey alongside you.