Senior ML/AI Engineer | Remote - 135807 INT (Alphaville - Barueri, BR, 06.

What we're looking for:

We are looking for an experienced Senior ML/AI Engineer to work on the development and architecture of advanced machine learning and generative AI systems. The candidate will be responsible for the design, construction, and deployment of complex agent-based AI systems, providing technical guidance and collaborating with teams to define the AI roadmap.

Responsibilities:

• Design, build, and deploy complex agent-based AI systems;

• Provide technical guidance to junior team members;

• Collaborate with production and application teams to define the AI roadmap;

• Design and implement agentic AI systems, including tool-calling agents, structured reasoning, and secure action execution, while defining security and compliance guidelines;

• Lead the development of evaluation frameworks for LLMs, designing retrieval pipelines, prompt synthesis, response validation, and self-correction loops;

• Architect connections between agents and observability, incident management, and deployment systems for automated diagnostics and runbook execution;

• Collaborate with production and application teams to translate challenges into agentic AI roadmaps, defining objective functions related to reliability, risk reduction, and cost reduction;

• Design validation models, adversarial prompts, and policy checks, establishing fallback and rollback strategies, and implementing continuous assessments;

• Optimize costs and latency through prompt engineering, context management, caching, model routing, and distillation to meet SLOs;

• Mentor and review the work of junior and mid-level engineers in agent design, evaluation methodology, and production readiness.

Requirements and Qualifications:

• In-depth experience with AWS services (ECS/EKS, Lambda, S3, DynamoDB, Redshift, Step Functions, SageMaker) and infrastructure as code (Terraform/CloudFormation);

• Experience in software development with Python, C/C++, Go, or Java, with strong experience in large-scale Python;

• Experience in the design, architecture, testing, and deployment of ML systems in production (deployment, evaluation, monitoring, data pipelines, fine-tuning workflows);

• In-depth hands-on experience with LLMs, including API integration, prompt engineering, fine-tuning/adaptation, RAG, and tool-using agents;

• Strong understanding of commercial and open-source LLMs and their trade-offs (e.g., OpenAI, Gemini, Llama, Qwen, Claude);

• Advanced knowledge of applied statistics, fundamental ML concepts, algorithms, and data structures;

• Advanced/fluent English.