Senior Full-Stack AI Engineer (AI)

Location: São Paulo; 100% remote work

Compensation: Competitive pay in USD; exact amount not specified

Company

hirify.global provides nearshore staff augmentation and technology solutions for U.S. companies, with a distributed team of more than 600 technology professionals across Latin America and 25+ countries.

What you will do

• Architect and ship end-to-end features for a context-aware AI agent platform.
• Design REST and GraphQL APIs, performant PostgreSQL data models, and resilient asynchronous background job systems.
• Build responsive React interfaces integrated with TypeScript backend services.
• Implement, evaluate, and optimize LLM agent workflows, including prompt engineering, tool integration, retrieval architectures, and runtime execution.
• Maintain production reliability, observability, data privacy boundaries, and robust handling of complex edge cases.

Requirements

• Strong professional experience with modern TypeScript, React, REST or GraphQL APIs, and relational database design with PostgreSQL.
• Experience building asynchronous background jobs, distributed queues, and debugging production systems.
• Hands-on experience or deep technical fluency with LLM and agent runtime architectures, tool calling, prompt engineering, and retrieval systems.
• Ability to convert ambiguous product requirements and user behavior into clean system designs and polished user interfaces.
• Strong commitment to correctness, data security, privacy, observability, and edge-case handling.

Nice to have

• Experience in fast-paced startup environments.
• Experience with LLM evaluations or fine-tuning.
• Background in multi-channel conversational tools, persistent memory, or agentic workflow platforms.

Culture & Benefits

• 100% remote work with flexibility to work from a suitable location.
• Competitive compensation paid in USD.
• Paid time off and autonomy over working time.
• Opportunities to work on projects for innovative U.S. companies.
• Multicultural collaboration with professionals across 25+ countries.
• Work alongside experienced senior technology professionals.