Senior AI Platform Engineer – HexCore, Eval Systems

This is a fully remote position, open to applicants in Brazil.

📋 Description

• Take ownership and enhance the core platform repository.

• Develop and sustain cross-client isolation in customer configurations.

• Manage the complete conversation logging system.

• Oversee the end-to-end evaluation suite.

• Create and maintain onboarding automation scripts that enable new customer deployment in under 30 minutes.

• Ensure all platform APIs achieve latency objectives.

⛳️ Requirements

• Bachelor's degree in Computer Science, Engineering, or a related technical discipline, or equivalent practical experience.

• Proficient or advanced skills in utilizing agentic workflows for coding in tools such as Cursor AI or Claude Code.

• A minimum of 4 years of experience in building and managing production-grade backend systems using Python.

• Demonstrated experience in overseeing a core platform or shared infrastructure layer utilized by various teams or customers.

• Proven hands-on experience with multi-tenant system design, including schema isolation, configuration-driven parameterization, and deployment automation.

• Background in constructing evaluation harnesses for LLM-based systems with quantitative metrics.

🏝️ Benefits

• 30 paid days off each year — use them for vacation, holidays, or personal time.

• 5 paid sick days, up to 60 days of medical leave, and 6 paid days off for family events such as weddings, funerals, or childbirth.

• Partially covered health insurance after the probation period.

• Wellness bonus for gym memberships, sports nutrition, and related needs.