Note: The job is a remote job and is open to candidates in USA. WEX is a fast-growing AI Engineering team focused on integrating artificial intelligence into their products and business. As a PhD Research Intern, you will apply your technical expertise to solve complex problems, collaborating with senior engineers and stakeholders to develop AI/ML solutions and present your findings.

Responsibilities

Collaborate with senior engineers, product managers, and domain experts to understand our customers' needs and challenges Apply your research skills to design, code, and test novel AI/ML solutions Develop, evaluate, and iterate on AI/ML models (including LLMs) to solve a core business problem Analyze existing platforms to identify bottlenecks and propose opportunities for algorithmic or systems-level improvements Gain hands-on experience with our production systems, including CI/CD pipelines (GitHub Actions) and Infrastructure as Code (Terraform) Present your findings and project outcomes to the team and key stakeholders at the end of your internship Skills Currently enrolled in a PhD program in Computer Science, Artificial Intelligence, Machine Learning, Statistics, or a related quantitative field Demonstrated research experience in AI, Machine Learning, Deep Learning, or Generative AI (e.g., publications, conference papers, or significant project work) Strong programming skills in at least one of our core languages: Python, Java, C#, or GoLang Deep understanding of modern ML algorithms, platforms, and packages (including deep learning and LLMs) Solid grasp of probability and statistics concepts (e.g., distributions, Bayesian inference, maximum likelihood estimation) A collaborative mindset and strong communication skills, with an ability to translate complex research into practical applications Evidence of innovative problem-solving and a drive to learn and excel Experience with cloud platforms (e.g., AWS) Familiarity with software development best practices (SDLC), CI/CD tools, and IaC (e.g., Terraform) Familiarity with container orchestration (e.g., Kubernetes) Experience or interest in the financial technology (FinTech) industry Benefits Health, dental and vision insurances Retirement savings plan Paid time off Health savings account Flexible spending accounts Life insurance Disability insurance Tuition reimbursement Company Overview Wex is a financial technology service provider for fleet, travel and healthcare industries. It was founded in 1983, and is headquartered in Portland, Maine, USA, with a workforce of 5001-10000 employees. Its website is http://www.wexinc.com. Company H1B Sponsorship WEX has a track record of offering H1B sponsorships, with 4 in 2026, 22 in 2025, 10 in 2024, 12 in 2023, 20 in 2022, 14 in 2021, 18 in 2020. Please note that this does not guarantee sponsorship for this specific role. Apply To This Job