AI Native Engineer - Senior Associate

Xtillionis a fast-growing AI solutions firm helping organizations build, operationalize, and scale high-value AI systems. We deliver end-to-end solutions, from design to deployment in real-world environments, combining deep dataexpertisewith astrongfocus on measurable business impact.

Based in San Juan, Puerto Rico, Xtillion partners with organizations across U.S. industries to solve complex, high-impact business problems. We invest in our people and offer opportunities to work on technically challenging, customer-facing systems that directly influence client success.

About the Role

We’re looking for a Senior AI Engineer to join our team. In this role, you’ll design, build, and deploy intelligent systems that solve real business problems; from LLM-powered applications and retrieval pipelines to predictive models and data-driven automation. You’ll bring together software engineering rigor and applied AI expertise to deliver production-grade solutions in client environments.

Whether your background is in software engineering, data science, machine learning engineering, or a blend of disciplines, this role is for builders who want to work at the frontier of applied AI: translating complex business challenges into scalable, reliable, AI-native systems that create measurable outcomes.

What You’llDo

• Partner with clients and cross-functional teams to translate business problems into AI solutions, defining scope, success metrics, and technical approach
• Design, build, and deploy AI-enabled applications, services, and workflows, including LLM-powered systems, retrieval pipelines, and intelligent automation
• Develop and maintain the APIs, backend services, and data pipelines that power scalable AI and analytical systems
• Drive model evaluation, prompt engineering, data preparation, and system testing to ensure quality, reliability, and continuous improvement
• Contribute to infrastructure and deployment workflows for AI systems in cloud environments
• Strengthen engineering culture through code reviews, architectural documentation, mentoring, and evolving team best practices

What We’re Looking For

Required Qualifications

• Bachelor’s degree in Computer Science, Software Engineering, Data Science, or a related field
• 4+ years of professional experience in software engineering, data science, machine learning engineering, or a related technical discipline
• Demonstrated experience building and deploying AI-enabled or data-intensive production systems
• Experience with modern backend or data frameworks (e.g., FastAPI, Node.js)
• Strong experience with SQL and relational or analytical data systems
• Experience working in cloud environments (e.g., AWS, Azure, GCP)
• Familiarity with Git-based version control, CI/CD pipelines, and modern development workflows
• Strong written and verbal English communication skills

Preferred Qualifications

• Hands-on experience with LLM-powered applications, orchestration frameworks (e.g., Lang Chain, Lang Graph), RAG architectures, vector databases, or prompt engineering techniques
• Background in applied machine learning, statistical modeling, or predictive analytics using modern frameworks (e.g., PyTorch, Tensor Flow, Hugging Face, scikit-learn)
• Experience with the ML lifecycle — experimentation, evaluation, monitoring, and deployment (MLOps)
• Experience designing and maintaining large-scale data pipelines, analytical platforms, or data-intensive systems
• Familiarity with containerization, orchestration, or Infrastructure as Code technologies (e.g., Docker, Kubernetes, Terraform)

Why Join Xtillion

AtXtillion,you’lltake ownership of meaningful, production-grade systems and work on software that is relied upon in real-world environments.

You’lljoin a fast-moving team where engineers influence technical direction and uphold strong engineering standards, supported by competitive compensation and meaningful opportunities for career growth.

Ready to Build What Matters?

Join Xtillionand be part of a collaborative team delivering real-world data and AI solutions ou’reexcited about taking ownership of complex systems and turning AI intomeasurablebusiness outcomes,we’dlove to hear from you!

We offer competitive salaries and a…