Staff AI Engineer (L4)

Job Title

Staff AI Engineer (L4)

Location

Remote (Must reside within 30 miles of: Portland, ME; Boston, MA; Chicago, IL; Dallas, TX; San Jose, CA; or Seattle, WA)

About the Team

We are a fast-growing AI Engineering team, driving WEX's strategic vision to integrate artificial intelligence into the core of our product and business. Our team thrives on collaboration, working directly with stakeholders and domain experts to develop innovative AI platforms and solutions that enhance decision-making and create groundbreaking products that benefit our customers and help them to effectively grow their business. We foster a culture of continuous learning and believe that the best work stems from a shared purpose and an enjoyable, engaging environment.

How You’ll Make an Impact

You are an experienced technical leader and subject matter expert with a deep passion for AI, Machine Learning, and software engineering. You possess a proven track record of architecting scalable systems and solving complex ambiguity using data-driven tools. You will act as a force multiplier for the team—setting technical standards, mentoring junior engineers, and partnering with product leadership to turn abstract business goals into production-grade AI solutions.

Responsibilities

• Technical Strategy & Architecture: Partner with stakeholders to translate complex customer challenges into robust technical designs and AI strategies.
• End-to-End Ownership: Architect, build, and deploy high-performance AI/ML platforms and tools, ensuring scalability, reliability, and security.
• Advanced Model Development: Lead the development, evaluation, fine-tuning, and monitoring of production-grade AI/ML models (including LLMs and RAG architectures).
• Operational Excellence: Design and standardize CI/CD pipelines (GitHub Actions) and Infrastructure as Code (Terraform) to ensure reproducible and automated deployments.
• Reliability & Scale: Proactively moni