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Upwork

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Senior AI Engineer

AI EngineerMachine Learning EngineerContractRemoteSeniorTeam 501-1,000Since 2015H1B SponsorCompany SiteLinkedIn

Location

Latin America

Posted

119 days ago

Salary

0

Seniority

Senior

EnglishPython

Job Description

Senior AI Engineer

Upwork

• 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. • Design and validate ontology-driven semantic models and knowledge graphs to improve NL answers accuracy and consistency. • Analyze NLQ failures and define structured error taxonomies, instrumentation, and logging to drive continuous improvement. • Develop and expose well-designed APIs for NLQ services, evaluation systems, and semantic layers. • Contribute to system architecture decisions including service boundaries, scalability, latency, and reliability tradeoffs. • Support cloud-native deployment, monitoring, and operational readiness of AI services.

Job Requirements

  • Strong software engineering background building production systems (Python, APIs, distributed services).
  • Experience evaluating NLQ or LLM-based systems, including precision/recall and semantic correctness.
  • Hands-on expertise designing automated test frameworks and evaluation pipelines.
  • Experience with cloud-native architectures, CI/CD, and production deployment of AI systems.
  • Knowledge of semantic modeling, ontologies, or knowledge graphs in data-driven applications.
  • Proven ability to design scalable, reliable systems bridging AI models, data platforms, and applications.

Benefits

  • Upwork is an Equal Opportunity Employer committed to recruiting and retaining a diverse and inclusive workforce. We do not discriminate based on race, religion, color, national origin, gender (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, gender expression, age, status as a protected veteran, status as an individual with a disability, genetic information, or other legally protected characteristics under federal, state, or local law.
  • Please note that a criminal background check may be required once a conditional job offer is made. Qualified applicants with arrest or conviction records will be considered in accordance with applicable law, including the California Fair Chance Act and local Fair Chance ordinances. The Company is committed to conducting an individualized assessment and giving all individuals a fair opportunity to provide relevant information or context before making any final employment decision.
  • To learn more about how Upwork processes and protects your personal information as part of the application process, please review our Global Job Applicant Privacy Notice

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