Mastercard

Platform Engineering Intern, Summer 2027 – St. Louis, MO, US

O'Fallon, Missouri, United StatesSWEStarts Summer 2027$25–30/hWork rights requiredGrad 2027–28

About this internship

Mastercard is hiring for an internship in software engineering, based in O'Fallon, Missouri, United States. It starts in Summer 2027 and lasts 16 weeks. The employer published it on 16 October 2026. Applications go through Mastercard's own careers site.

What the posting asks for

  • Graduating in 2027 or 2028
  • Right to work in the country required
  • Tools mentioned: Java

How hard is it to get?

Our ease score for this internship is 55/100. It is an estimate from public signals (employer, desk, programme, city, how recent the posting is, number of openings), not an admission rate. The factors that weigh most:

  • -8 Mastercard is a sought-after employer
  • +4 posted 6 days ago: still early
  • -3 software internships draw many applicants

Key facts

Employer
Mastercard
Location
O'Fallon, Missouri, United States
Desk
Software Engineering
Contract
Internship
Start
Summer 2027
Pay
$25–30/h (as stated in the posting)
Duration
16 weeks
Posted
16 October 2026
Ease score
55/100 (estimate)

Facts taken from Mastercard's careers site, checked every 3 hours. The full posting, and the application, are on the employer's site.