AI Native Engineer - Senior Associate

Xtillion, LLC; San Juan, Northern (PR, KY); Hybrid; USD 120,000 - 180,000; Full time

Benefits offered by this job

Medical, dental and vision coverage

Paid time off

401(k) plan

Job summary

Xtillion, based in San Juan, Puerto Rico, seeks a Senior AI Engineer to design, build, and deploy intelligent systems addressing real business problems. You will work on LLM-powered applications, retrieval pipelines, predictive models, and data-driven automation in production-like client environments.

Ideal candidates combine software engineering rigor with applied AI expertise, collaborating with cross-functional teams to deliver measurable outcomes and high-impact solutions.

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, ML engineering, or 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.

Responsibilities

• 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.

Skills

Software Engineering

Data Science

ML Engineering

Backend Systems

SQL

Cloud Platforms

CI/CD

English Communication

Education

Bachelor’s degree in CS/Software Eng/Data Science

Tools

FastAPI

Node.js

Git

Docker

Kubernetes

AWS

Job description

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.

WhatYou’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

WhatWe’reLooking 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., LangChain, LangGraph), RAG architectures, vector databases, or prompt engineering techniques
• Background in applied machine learning, statistical modeling, or predictive analytics using modern frameworks (e.g., PyTorch, TensorFlow, 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 JoinXtillion

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?

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

We offer competitive salaries and a comprehensive benefits program for full‑time employees, including medical, dental and vision coverage, paid time off and 401(k) plan.

We are committed toprovidingequal employment opportunities to qualified individuals with disabilities. This includes providing reasonable accommodation whereappropriate. Should you require a reasonable accommodation to apply orparticipatein the job application or interview process, please contact [e-mail]

Xtillion is an equal opportunity employer that does not discriminate against any employee or applicant because of race, creed, color, religion, gender, sexual orientation, gender identity/expression, national origin, disability, age, genetic information, veteran status, marital status, pregnancy, or any other basis protected by law. Employment at Xtillion is based solely on a person's merit and qualifications.