Staff AI Engineer

Description

**VemSerFrete.com** =================== Move the future of logistics with us We are building the digital platform that empowers transportation across Latin America. At Frete, your work has a real and daily impact on the lives of millions of people. Frete.com is the largest freight platform in Latin America and operates under the brands Fretebras, Cargo X, and Intersite. Join Frete.com and learn more about the challenge within the Data team. **About the Role** ================= Be the technical reference for Applied Artificial Intelligence (LLMs and Agents) at Frete.com, leading the development of generative AI and agent-based systems that automate processes, increase operational efficiency, and deliver direct business impact. Work end-to-end on solution development — from conception to production — ensuring quality, reliability, scalability, and integration with company systems. **Responsibilities and Duties** =================================== * Develop generative AI applications and end-to-end multi-agent systems (backend + orchestration + integration); * Design and implement agents that execute real tasks and workflows (not just conversational responses); * Architect and evolve LLM-based systems (RAG, tool calling, memory, orchestration); * Integrate language models into internal systems via APIs to enable process automation; * Build data pipelines and vector databases to support high-precision, low-hallucination applications; * Define and implement quality metrics for agents (accuracy, groundedness, error rate); * Monitor and optimize performance, latency, and cost (tokens / inference); * Ensure observability, traceability, and reliability of production solutions; * Investigate failures and propose continuous structural improvements; * Collaborate closely with Product, Engineering, and Operations teams to develop business-impacting solutions; * Promote engineering best practices, code reviews, and knowledge sharing; **Skills and Prerequisites** ================================= * Solid software engineering experience (5+ years); * Proficiency in Python and API development (FastAPI, Flask or similar); * Hands-on experience building LLM-powered applications in production (with real-world use cases); * Experience with agent frameworks (LangGraph, LangChain, CrewAI or similar) or custom orchestration implementations; * Experience with: * + RAG (chunking, retrieval, re-ranking); + Function / tool calling; + API integration; * Experience developing agents that perform actions and automate processes; * Experience with vector databases in production (e.g., Pinecone, Weaviate, Milvus, pgvector); * Experience evaluating LLM quality and mitigating hallucinations; * Experience with monitoring, observability, and operating production systems; * Familiarity with production trade-offs: latency, cost, and scalability; * Experience with code versioning (Git); * Strong communication skills, structured thinking, and results orientation; * Ability to translate business problems into technical solutions; **Differentiators** ================ * Experience with multi-agent architectures and distributed systems; * Experience with LLMOps (governance, traceability, security); * Experience with messaging systems (Kafka, RabbitMQ); * Experience with cloud platforms (AWS, GCP or Azure); * Experience with CI/CD for AI applications; * Knowledge of open-source models (LLaMA, Mistral, Mixtral, etc.); * Experience with automated prompt and agent evaluation; * Experience in high-volume, mission-critical environments; **Our Values:** Absolute commitment Focus on outstanding results Giant ambition Collaboration with positive friction Extreme sense of urgency By joining Frete, you’ll receive: ️ **Meal or Food Allowance** – paid via Flash flexible card **Transportation Allowance or Mobility Assistance** **Bradesco Health Insurance** **Dental Care Plan** ️ **Life Insurance** **Pharmacy Benefit Program** **2% of your annual salary for Well-being** **Childcare Assistance** – check eligibility **Birthday Day Off** ️ **TotalPass** – For your health and well-being **PipoSaúde** **Educational Partnerships** – discounts for MBAs, postgraduate programs, language courses (Open English), and technology courses (FIAP) **Home Office Setup Assistance + Monthly Home Office Allowance** – for fully remote positions And many more benefits you’ll discover during the hiring process! Join our team! **Work Modality:** * **Technology (Security, Engineering, and Data Science):** 100% Remote; * **Product (Design, Fraud Prevention, and BI):** 3 days in-office, 2 days remote; * **All Other Areas:** Full-time in-office. Our office is located in São Paulo, in the Morumbi region. * Do you have a disability? Our positions are also open to people with disabilities (PCDs). **If this resonates with you, step on the road with us and become a Freteiro**