Frontend Engineering Intern - Fall 2026 at Mercury in Remote

Summary: Mercury is a financial technology company that offers a product serving over 100,000 businesses. They are seeking a Frontend Engineering Intern who will receive mentorship, work on TypeScript code, and contribute to enhancing their product's user interface and experience. Responsibilities: - 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 Required Qualifications: - 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 - Experience with the TypeScript programming language Preferred Qualifications: - Experience with React Required Skills: TypeScript Important Skills: React Nice-to-Have Skills: Curiosity, Quality appreciation, Clear communication Internship Start Date: Start in 2026 Fall