Staff AI Engineer – L4

🕒 August 4

🏄 California, Illinois, +4 more states – Remote

🏄 California – Remote 🌽 Illinois – Remote 🦞 Maine – Remote 🍂 Massachusetts – Remote 🤠 Texas – Remote ☕ Washington – Remote

💵 $185k - $217.4k / year

⏰ Full Time

🔴 Lead

🤖 AI Engineer

🦅 H1B Visa Sponsor

This company has sponsored H1B visas in the past.

👻 Ghost score 23%

What it means: how likely this posting is sitting open without active hiring.How to read it: 60% or higher means we think this is a ghost. Lower scores are less of a worry.How we score it: age, reposts, open roles vs team size, how fast jobs close, and whether pay is listed.Fine print: an estimate from public data, not a judgment of the company. Real jobs can score high, so treat it as a hint, not a fact.

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WEX

WebsiteLinkedInAll Job Openings

5001 - 10000 employees

Founded 1983

🏥 Healthcare

📦 Logistics

✈️ Travel

💰 $310M Post-IPO Debt on 2020-06

Healthcare • Logistics • Travel

WEX is a global commerce platform specializing in various business solutions to address operational challenges. They provide services in managing and mobilizing fleets with their fuel card systems, offering comprehensive fleet management and analytics. Additionally, they focus on business payments solutions that streamline processes across industries, enhancing efficiency and security. WEX is also involved in employee benefits administration, helping organizations effectively manage health and reimbursement accounts. Their diverse range of services caters to numerous sectors, emphasizing innovation, sustainability, and effective solutions for business growth.

📋 Description

• Partner with stakeholders to translate complex customer challenges into robust technical designs and AI strategies • Architect, build, and deploy high-performance AI/ML platforms and tools • Develop, evaluate, fine-tune, and monitor production-grade AI/ML models, including LLMs and RAG architectures • Design and standardize CI/CD pipelines using GitHub Actions and Infrastructure as Code using Terraform • Monitor system health and lead incident response for critical AI systems • Drive architectural refactoring to remove bottlenecks • Mentor L1/L2 engineers and conduct code reviews • Evaluate emerging AI technologies and vendors and prototype new approaches • Set technical standards and partner with product leadership to turn business goals into production-grade AI solutions

🎯 Requirements

• 8+ years of experience as an AI/ML Engineer, Data Scientist, or Software Engineer with a heavy focus on production ML systems • Bachelor's degree in Computer Science, Software Engineering, or related field • Proven track record of taking AI solutions from concept to high-scale production using Java, C#, GoLang, or Python • Deep experience with Generative AI, including prompting strategies, RAG (Retrieval-Augmented Generation), fine-tuning, and agentic workflows • Strong ability to design distributed systems and microservices architectures for model serving • Expert proficiency in Python or other core languages (Java, Go, C#) • Deep knowledge of PyTorch, TensorFlow, Scikit-learn, LangChain, LlamaIndex, and vLLM • Advanced understanding of MLOps principles, feature stores, and model monitoring • Solid grasp of advanced probability, statistics, and linear algebra • Extensive hands-on experience with Kubernetes and cloud platforms, preferably AWS • Strong command of CI/CD methodologies and Terraform • Excellent data engineering skills, including SQL, NoSQL, data lakes, and processing pipelines • Experience in the financial or fintech industry is a plus

🏖️ Benefits

• health, dental and vision insurances • retirement savings plan • paid time off • health savings account • flexible spending accounts • life insurance • disability insurance • tuition reimbursement • quarterly or annual bonus for non-sales roles, based on applicable plan