Short answer: Microsoft posts Summer 2027 software engineering internships team by team, with rolling review. Several went up in October and November 2026 (for example on October 21, November 3 and November 5). Explore, Microsoft's program for second-year students, takes applications in the first week of each month from October to December 2026, so the next window is the first week of December.

Microsoft Explore (second-years)

Explore, Summer 2027
WhoStudents in the second year of a four-year degree
RequirementsAn intro computer science course and a semester of calculus
Length and place12 weeks, Redmond
ApplicationsFirst week of October, November and December 2026, or until filled

Software engineering internships

Rather than one posting, Microsoft runs many: security, Teams, AI and more. Each says applications are accepted on an ongoing basis until the role is filled, and stays up for at least five days. New ones appear through the fall, so check weekly.

What to do now

  • Sophomores: have your application ready for the first week of December.
  • Juniors: apply to every team posting that fits; they are reviewed separately.
  • Everyone: rolling review means a posting can close any day once filled.
  • Keep a list of the teams you applied to, since each posting is tracked separately.

Where to look on Useno

Search the board for Microsoft, or browse the 638 software engineering internships for companies still hiring.

Last year, for comparison

In the SimplifyJobs public internship list, Microsoft's first Summer 2026 role appeared on August 12, 2025, and its first Summer 2027 role on August 3, 2026. The list leans toward software, data and finance roles, so read these as the earliest postings it caught, not official opening dates.

Sources

Employer dates come from each employer's own pages where they publish them. A date that only a third party reports is marked Third party. Useno counts are Useno's own data, read on November 9, 2026.