Software Engineering Intern, Summer 2026

Paychex is hiring Software Engineering Interns for Summer 2026 in Rochester, NY. Join a team building next-generation payroll and HR SaaS products used by more than 745,000 small and mid-size businesses. Interns contribute to real features across Paychex Flex, our cloud HCM platform, working in Java, Spring Boot, Angular, and AWS. You'll pair with engineers on story breakdown, write unit and integration tests, participate in architecture reviews, and present a final demo. The 12-week paid program includes structured technical curriculum, mentorship from senior engineers, and return-offer evaluation. Qualifications: pursuing BS/MS in CS, Software Engineering, or related discipline; graduation Dec 2026 – May 2028; experience with one OO language; familiarity with web development, databases, and version control.