Frontend Engineering Intern - Spring 2026

9 Minutes ago • All levels • ~ $114,400 PA
Frontend Development

Job Description

Mercury is seeking a Frontend Engineering Intern for Spring 2026. This paid full-time remote internship, lasting 12-16 weeks, offers mentorship from experienced engineers. Interns will write TypeScript and/or Haskell code, contributing to a product used by over 100,000 businesses. The role focuses on building a beautiful app, leveraging advanced TypeScript features, and exercising ownership over product development within an established codebase.
Good To Have:
  • Experience with React.
Must Have:
  • 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.
Perks:
  • Paid full-time remote internship
  • Mentorship from experienced engineers
  • Opportunity to contribute to a product serving over 100,000 businesses
  • Work on a beautiful app with high UI standards
  • Push the limits of TypeScript's advanced static typing features
  • Work in an established codebase with room for growth
  • Exercise ownership over the product and contribute ideas
  • Intended for individuals enrolled in an academic program

Add these skills to join the top 1% applicants for this job

cad-computer-aided-design
talent-acquisition
game-texts
react
typescript

It’s 1813 and Humphrey Davy is dazzling London with scientific demonstrations and lectures. Soon enters the young bookbinder, Michael Faraday, dissatisfied with his own prospects and enamored by the mysteries of electricity. Faraday gets a break and gains an apprenticeship with Davy, and shortly thereafter (partially) blows himself and Davy up in a nitrogen trichloride explosion.

We think Davy’s sacrifice was worth it, though, since Faraday went on to do experimental work in the field of electromagnetism that is foundational to innumerable modern technologies. While we can’t promise you’ll become the next Faraday, we can promise you won’t be asked to deal with explosives on the job.

Instead, you’ll be receiving mentorship from experienced engineers, writing TypeScript and/or Haskell code, and contributing to a product that serves over 100,000 businesses. Check out demo.mercury.com to see our product for yourself.

As an Engineering Intern, you’ll join a team that aligns with your goals and interests. During the interview process, you’ll have the opportunity to talk through the various team openings.

All Engineering Interns, regardless of the specific role, should:

  • 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.

Frontend Engineering Interns should have experience with the TypeScript programming language, and experience with React is a plus. In this role you can expect to:

  • 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 summer 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.

In terms of compensation, the hourly rate for candidates based in the US is $55. The hourly rate for candidates based in Canada is CAD 55.

Applications close on October 10, 2025. Please apply only to the single intern position that best aligns with your qualifications and interests.

values diversity & belonging and is proud to be an Equal Employment Opportunity employer. All individuals seeking employment at are considered without regard to race, color, religion, national origin, age, sex, marital status, ancestry, physical or mental disability, veteran status, gender identity, sexual orientation, or any other legally protected characteristic. We are committed to providing reasonable accommodations throughout the recruitment process for applicants with disabilities or special needs. If you need assistance, or an accommodation, please let your recruiter know once you are contacted about a role.

We use Covey as part of our hiring and / or promotional process for jobs in NYC and certain features may qualify it as an AEDT. As part of the evaluation process we provide Covey with job requirements and candidate submitted applications. We began using Covey Scout for Inbound on January 22, 2024. Please see the independent bias audit report covering our use of Covey here.

#LI-DNI

Create a Job Alert

Interested in building your career at? Get future opportunities sent straight to your email.

Create alert

Apply for this job

------------------

  • indicates a required field

Autofill with MyGreenhouse

First Name*

Last Name*

Email*

Phone

Country*

Phone*

Resume/CV*

AttachAttach

Dropbox

Google Drive

Enter manuallyEnter manually

Accepted file types: pdf, doc, docx, txt, rtf

Cover Letter

AttachAttach

Dropbox

Google Drive

Enter manuallyEnter manually

Accepted file types: pdf, doc, docx, txt, rtf

---

LinkedIn Profile

Website

Upload anything

AttachAttach

Dropbox

Google Drive

Accepted file types: pdf, doc, docx, txt, rtf

Past work, references, side projects, fun facts, recent poetry, etc.

From where do you intend to work?*

Please list city and state/province (San Francisco, California, Toronto, Ontario, etc.)

Will you now or at any time in the future require visa sponsorship?*

Select...

Start Date Preference *

January 5th, 2026

Other

Select any start date options that work for you. If none of these options work, select "Other" and we'll discuss additional options if you were to move forward in the interview process.

If currently enrolled in an academic program, please select your anticipated graduation/completion date (month and year). *

January 5th, 2026

Other

What part of the stack are you most interested in? *

Backend

Frontend

Full-stack

Why are you interested in interning at?

No word count expectation. Please note, this isn't a cover letter, but truly just an opportunity for us to hear a little more about what has you interested in specifically.

Submit application

Set alerts for more jobs like Frontend Engineering Intern - Spring 2026
Set alerts for new jobs by Mercury
Set alerts for new Frontend Development jobs in United States
Set alerts for new jobs in United States
Set alerts for Frontend Development (Remote) jobs

Contact Us
hello@outscal.com
Made in INDIA 💛💙