Contract: Senior AI Engineer

Upwork

Full-time Brazil, Brazil Computer Occupations

Posted:

February 23, 2026

Location:

Brazil, Brazil, Brazil

Job Description

This hybrid engagement supports the development and production hardening of Natural Language Query (NLQ) systems, AI agents, and related applications powering talk-to-data experiences. The work focuses on improving NLQ accuracy and semantic understanding while building robust, scalable, and observable AI systems suitable for enterprise production environments.

This engagement requires senior-level software engineering depth, combined with AI evaluation and semantic modeling expertise, to translate research concepts into reliable, deployable systems.

Work/Project Scope:
Design, implement, and maintain production-grade AI services supporting NLQ and AI agent workflows.

Evaluate the NLQ system accuracy using quantitative and qualitative methods (precision/recall, semantic correctness, result equivalence).

Build automated evaluation pipelines and regression test suites integrated into CI/CD workflows.

D...

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Job Overview

Job Type: Full-time

Location: Brazil, Brazil

Posted: February 23, 2026

Deadline: April 04, 2026