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CI&T

Mid-level AI Python Developer, Backend

CI&T

. Integrate AI models with real-world systems for B2C and B2B journeys .

Posted 10/22/2026full-timeBrazilMid-LevelSeniorWebsite

Core Competencies

Role fit
Core Competencies

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Demonstrates expertise in integrating AI models with real-world systems, focusing on backend development with Python, API management, and LLM utilization. Proficient in implementing security measures and optimizing conversational AI through effective orchestration and context management.

Highest-signal resume keywords
LLM Use And Prompt EngineeringBackend Development With PythonAI Orchestration FrameworksBuilding And Maintaining RAG PipelinesAPI Management And Security

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills
PythonREST APIsWebhooksRAG PipelinesLLM Tracing ToolsGitDockerRelational DatabasesNoSQL DatabasesAsynchronous Processing
Tools & Technologies
LangChainLangGraphLlamaIndexLangfuseLangSmithRedisSQSCelery
Industry Keywords
B2CB2BConversational State MachinesContext RetrievalError HandlingSecurityFunction CallingAutomated EvaluationModel Context Protocol

Tech Stack

Tools & technologies
DockerNoSQLPythonRedis

About the role

Key responsibilities & impact
  • Integrate AI models with real-world systems for B2C and B2B journeys
  • Develop and maintain standardized APIs and webhooks as tools for the AI agent
  • Ensure security and rigorous error handling across APIs and webhooks
  • Support the design and maintenance of conversational state machines/graphs
  • Manage interaction context in long-running conversations
  • Monitor and fine-tune context retrieval from the knowledge base
  • Refine the data provided to the LLM to improve response accuracy
  • Collaborate with Senior Engineers on architectural improvements
  • Analyze production metrics
  • Implement new security and orchestration layers

Requirements

What you’ll need
  • Practical understanding of LLM use and Prompt Engineering techniques, including hallucination mitigation, context-window management, and structured output generation (JSON/Pydantic)
  • Hands-on experience building and maintaining RAG pipelines (ingestion, chunking, embedding generation, and searches in vector databases)
  • Ability to securely connect LLMs to external systems through Function Calling (Tools), with robust input and output data validation
  • Strong backend development experience with Python, including consuming and creating REST APIs, webhooks, and authentication
  • Ability to debug and analyze model responses, supporting the creation of test cases
  • Hands-on experience with AI orchestration frameworks such as LangChain, LangGraph, LlamaIndex, or similar tools
  • Practical use of LLM tracing tools such as Langfuse, LangSmith, or similar tools
  • Proficiency with Git, Docker, and relational/NoSQL databases
  • Basic knowledge of queues and asynchronous processing, such as Redis, SQS, or Celery
  • Familiarity with automated evaluation (EVAL) methodologies, including LLM-as-a-judge — optional
  • Interest in and knowledge of the Model Context Protocol (MCP) — optional

Benefits

Comp & perks
  • Health and dental insurance
  • Meal and food allowances
  • Childcare assistance
  • Extended parental leave
  • Partnerships with gyms and health and wellness professionals through Wellhub (Gympass) and TotalPass
  • Profit-sharing and performance bonus (PLR)
  • Life insurance
  • Continuous learning platform (CI&T University)
  • Discount club
  • Free online platform dedicated to promoting physical and mental health and well-being
  • Pregnancy and responsible parenting course
  • Partnerships with online course platforms
  • Language-learning platform
  • Support and accommodations for people with disabilities
  • Assistance obtaining disability documentation
  • Dedicated Health and Well-being team
  • Inclusion specialists and affinity groups