AI Native Engineer - Senior Associate

Xtillion; San Juan (PR); On-site; 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, a San Juan-based AI solutions firm, seeks a Senior AI Engineer to design, build, and deploy intelligent systems that solve real business problems. You’ll work on LLM-powered apps, retrieval pipelines, predictive models, and data-driven automation in client environments.

Ideal candidates bring software engineering, data science, or ML engineering backgrounds and a passion for translating complex challenges into scalable, reliable AI-native systems with measurable outcomes.

Qualifications

• Bachelors in CS/Software Eng/Data Science or related field.
• 4+ years in software engineering, data science, or ML engineering.
• Experience building AI-enabled or data-intensive production systems.
• Proficient with modern backend/data frameworks (FastAPI, Node.js) and SQL.
• Cloud experience (AWS/Azure/GCP) and CI/CD familiarity.
• Strong English written and verbal communication.

Responsibilities

• Partner with clients to translate problems into AI solutions with clear success metrics.
• Design, build, deploy AI-enabled apps, services, and workflows including LLMs.
• Develop APIs, data pipelines, and backend services powering AI systems.
• Lead model evaluation, prompt engineering, data prep, and testing for quality.
• Contribute to deployment workflows in cloud environments and infra.
• Mentor teammates and improve engineering practices.

Skills

4+ years experience

AI-enabled systems

English communication

SQL & analytical data

Cloud environments

CI/CD workflows

LLM/prompt engineering

PyTorch/TensorFlow/HuggingFace

Education

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

Tools

FastAPI

Node.js

Docker

Kubernetes

Terraform

Job description

AboutXtillion

Xtillion is 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

At Xtillion, you’ll take ownership of meaningful, production‑grade systems and work on software that is relied upon in real-world environments. You’ll join 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 Xtillion and be part of a collaborative team delivering real-world data and AI solutions at scale. If you’re excited about taking ownership of complex systems and turning AI into measurable business outcomes, we’d love to hear from you!

Learn more at

https://www.xtillion.com

Benefits

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.

Accessibility Statement

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

Equal Opportunity Employer

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.