Software Engineering Intern - Spring 2027

About the role

As an Engineering Intern at Mercury, you’ll receive mentorship from experienced engineers while writing TypeScript and/or Haskell code for a product that serves over 300,000 businesses. You’ll have the chance to explore team openings during the interview process and contribute to features that help startups manage their finances. Check out demo.mercury.com to see the product in action. Applications close on September 25th, 2026.

Responsibilities

• Collaborate with data analysts to spec and build features that attract new customers.
• Provide backend functionality for mobile and web frontends (e.g., search transactions, send wire transfers).
• Build admin tools to improve support operations (e.g., identify fraudulent customers, manage accounts).
• Integrate with third‑party APIs (e.g., send checks, validate SWIFT codes).
• Work on the frontend UI, maintaining high design standards and contributing to features like the date picker.
• Leverage advanced TypeScript static typing to prevent errors in a financial technology context.
• Exercise ownership by collaborating with designers and proposing product improvements.
• Depending on your track, combine backend and frontend work (full‑stack) or focus on one side.

Requirements

• Currently enrolled in an undergraduate or graduate academic program.
• Interest in continually honing your craft.
• Curiosity and willingness to share your perspective.
• Appreciation for quality in your own work and that of others.
• Strong communication skills, including the ability to write clear explanations of technical decisions.

Qualifications

• Backend track: Experience with Haskell or a strong desire to learn it, plus familiarity with SQL.
• Frontend track: Experience with TypeScript; React experience is a plus.
• Full‑stack track: Experience with Haskell (or desire to learn), familiarity with SQL, and experience with TypeScript.

Skills

• Haskell
• TypeScript
• SQL
• React (frontend)
• API integration
• UI/UX design collaboration

Benefits

• Paid internship
• Fully remote work
• Mentorship from senior engineers
• Full‑time schedule (12‑16 weeks, spring term)
• Opportunity to work on a product used by over 300k businesses

Pay