Senior AI Agent Engineer - Remote - Latin America

About this role

About FullStack
FullStack is the most transparent IT talent network, connecting highly skilled individuals with top global companies and Silicon Valley startups for remote, on-demand projects. We focus on building a trusted, high-performance network where talent can thrive in a positive, respectful, and supportive environment. By prioritizing transparency, fair opportunities, and professional growth, we empower our engineers to deliver their best work while collaborating with innovative teams worldwide.


We’re Most Proud Of

• Offering life-changing opportunities for talented software professionals across the Americas.
• Enhancing highly-skilled software development teams of hundreds of the world’s greatest companies.
• Our 4.2-star rating on GlassDoor.
• Our client Net Promoter Score of 68, twice the industry average.

The Opportunity
Join our talent network and connect with U.S. clients for flexible, project-based development work as a Senior AI Agent Engineer.

• You will integrate directly into our client's team and work alongside their existing designers and engineers on a daily basis.

What We're Looking For

• 5+ years of professional software development experience.
• 3+ years of experience building production-ready AI applications, with a proven track record of deploying LLM-based agents and conversational systems.
• Advanced English is required.
• Successful completion of a four-year college degree is required.
• Proven experience deploying production-grade systems using OpenAI, Claude, or Gemini, with a deep understanding of prompt engineering and model behavior.
• Hands-on experience building autonomous agents or complex chatbots using frameworks like LangChain, OpenAI Assistants API, or CrewAI.
• Practical experience with AI voice platforms such as Vapi, Retell, or Twilio to build real-time conversational systems.
• Strong mastery of Python (FastAPI/Flask) for building scalable APIs and handling asynchronous processes.
• Solid...