Software Engineering Intern

Who you are

• Be interested in continually honing their craft
• Have curiosity and be willing to share their perspective
• Appreciate quality in their work and that of others
• Communicate well, and be able to write clear explanations of their reasoning on technical decisions
• Backend Engineering Interns should have experience using the Haskell programming language, or a strong desire to learn it, and have some familiarity with SQL. In this role you can expect to:
• Collaborate with data analysts to spec and build features that draw new customers to our product
• Provide a backend to our mobile and web frontends, to do things like search transactions or send wire transfers
• Build admin tools to increase the efficiency of day-to-day support operations, like identifying fraudulent customers or managing accounts
• Integrate with third-party APIs, to do things like send checks or validate SWIFT codes
• Frontend Engineering Interns should have experience with the TypeScript programming language, and experience with React is a plus

What the job involves

• Work on a beautiful app: Since many of our customers are startups, they appreciate a well-implemented design. We have high standards for our UI, and we think it shows on our website. We encourage you to sign up and check out our onboarding experience, or read our blog post about our date picker
• Push the limits of TypeScript: As a financial technology company, preventing errors is a top priority for us, and we take advantage of TypeScript’s advanced static typing features to prevent them
• Work in an established codebase that still has room for growth. Across 650K lines of TypeScript, we’ve built abstractions and components that will give you leverage to build great features during your months at Mercury. But there’s still a lot more to build, be it optimizing the scrolling performance of a combobox, or building whole pages to deliver a feature to customers
• Exercise ownership over the product: Our engineers work closely with our designers and contribute their own ideas to make the product better
• This is a paid, full-time, remote spring internship for 12-16 weeks between January and May. Our internship program is intended for individuals enrolled in an academic program (undergraduate, graduate, etc.). Individuals interested but not enrolled in an academic program at this time are encouraged to apply to any of our full-time openings

The application process

• Applications close on September 25th, 2026

Benefits

• Health, dental, & vision
• 12+ weeks of paid parental leave
• $600 USD custom WFH equipment setup
• Unlimited vacation policy (with a mandatory minimum)
• Annual $1K learning & development budget
• Paid 6-week sabbatical after the 5-year mark
• Weekly $100 food budget
• Monthly $100 wellness budget
• Monthly $50 cellphone reimbursement
• Pet-friendly offices with free tea and beverages, plus lunch and snacks
• Unlimited vacation policy (with a mandatory minimum)
• Retirement matching up to 4% of base salary (401K/RRSP)
• Inclusive fertility, hormonal health, and family-forming benefits through Carrot Fertility