Job Description

***Positions posted by El Comeback are done on behalf of companies that we support in their search for candidates.***

Job Title: Software Engineer Senior Associate

Location: San Juan, Puerto RicoApply

About Xtillion

Our client, 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 data expertise with a strong focus 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 Associate Software Engineer to join our growing team. In this role, you'll build and deploy AI-powered, production-grade software systems within client environments. You'll operate at the intersection of software engineering, data systems, and applied AI, translating complex business problems into scalable, reliable solutions.

This position is ideal for engineers who enjoy hands-on system building, working closely with clients, and shaping technical direction and best practices across projects.

What You'll Do

• Collaborate with cross-functional teams to define business and technical requirements

• Partner on design and build data pipelines that ingest, transform, and deliver data from source systems to analytical platforms using modern cloud technologies

• Support on design and implement infrastructure and data platforms that enable reliable access, transformation, and analysis of data

• Document and maintain data architecture to support reliable, scalable data systems

• Contribute to improving engineering practices around quality, maintainability, and operational stability

• Mentor and support other engineers through code reviews, design discussions, and day to-day collaboration

What Were Looking For

Required Qualifications

• 4+ years of professional software engineering experience, including backend and/or data engineering

• Experience delivering production systems in environments with evolving or changing requirements

• Experience building and maintaining APIs and backend services (e.g., FastAPI, Node.js, or similar frameworks)

• Strong experience with SQL and relational or analytical data systems

• Experience working in cloud environments (AWS, Azure)

• Experience with modern engineering workflows, including Git-based version control and CI/CD pipelines

• Good understanding of software engineering best practices, testing strategies, and agile delivery

• Strong written and verbal English communication skills

Preferred Qualifications

• Hands-on experience building and deploying AI-enabled systems, particularly LLM-powered workflows and orchestration (e.g., LangChain, LangGraph)

• Familiarity with Infrastructure as Code tools (e.g., Terraform)

• Background in designing and maintaining data pipelines or data-intensive systems

• Exposure to data warehouses or large-scale analytical platforms

• Knowledge of workflow orchestration or distributed processing systems

Why Join Xtillion

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, wed love 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.

 ***El Comeback is a non-profit program from ConPRmetidos that attracts and retains professional talent for Puerto Rico-based jobs. Register at elcomebackpr.org/registration-form to get matched with professional opportunities on the island.***