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Full-stack Engineering Intern - Summer 2026

Mercury is a fintech company building banking and financial tools used by over 100,000 businesses. We're seeking a Full-stack Engineering Intern for Summer 2026 who will receive mentorship from experienced engineers, write TypeScript and/or Haskell code, and ship meaningful features that support web and mobile products and internal tooling.

Skills

  • Proficiency in TypeScript and/or experience with Haskell or strong desire to learn it
  • Familiarity with SQL and relational data modeling
  • Experience building or calling RESTful APIs and integrating third-party services
  • Ability to write clear, testable code and documentation
  • Strong communication and collaboration skills

Responsibilities

  • Collaborate with engineers and data analysts to spec and implement features that attract and retain customers
  • Build backend services and APIs to support web and mobile frontends (e.g., search, transfers)
  • Develop admin tools to improve support efficiency (fraud detection workflows, account management)
  • Integrate with third-party services and APIs (checks, SWIFT validation, payment partners)
  • Write clear technical documentation and explain design decisions during code reviews and interviews

Education

  • Currently enrolled in an academic program (undergraduate or graduate) during the internship period
  • Available full-time for a 12–16 week paid internship between May and September 2026

Benefits

  • Paid internship ($55/hr US; CAD 55/hr Canada)
  • Mentorship from experienced engineers and exposure to product development
  • Remote-first role with opportunity to work with cross-functional teams
  • Real-impact projects used by 100,000+ businesses and hands-on experience integrating production systems
  • Commitment to diversity, equity, and reasonable accommodations during hiring
To read the complete job description, please click on the ‘Apply’ button
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CULTURE VALUES
Dare to be Different
Diversity of Opinions
Inclusive & Diverse
Empathetic
Take Risks
FUNDING
SENIORITY LEVEL REQUIREMENT
TEAM SIZE
SALARY RANGE
$83,500/yr - $114,400/yr
EMPLOYMENT TYPE
Internship, remote
DATE POSTED
October 13, 2025
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