# Senior Software Engineer - Cards at Mercury

- Company: Mercury
- What the company does: Everything you do with money. All in one place. Apply in 10 minutes for business banking that transforms how you operate. Backed by Sequoia, a16z and 500 Global.
- Company website: https://mercury.com/
- Type: Startups
- Level: Senior
- Location: San Francisco, CA, New York, NY, Portland, OR, or Remote within Canada or United States
- Work setup: Remote
- Posted: 2026-10-23
- Apply by: 2026-12-07
- Apply: https://job-boards.greenhouse.io/mercury/jobs/6233820004?utm_source=1752vc&utm_medium=careers
- Page: https://www.1752.vc/careers/jobs/mercury-senior-software-engineer-cards/

## About the role

As the story goes, in 1949 Frank McNamara finished dinner at a New York restaurant and found he'd left his wallet in another suit. His fix was a card that let members eat now and pay later. That card became Diners Club, widely credited as the first multipurpose charge card. It was a piece of cardboard and a promise: the restaurant trusted the card, the card trusted the member, and someone had to make sure the money actually moved. Found on 1752vc Careers, the job board for startup and VC roles.

## What they're looking for

- Lead projects from idea to tech spec to implementation to launch, working with your PM, EM, tech lead, and teammates at each stage. When you lead a project, it's yours to see through
- Learn how debit and credit cards actually work under the hood (authorization, clearing, settlement, disputes) and use that knowledge every day
- Build features across the stack, from the card experiences customers use to the backend systems that move money
- Help keep our operations excellent. Our systems are some of the most observable at Mercury, and with great observability comes great responsibility
- Mentor other engineers and raise engineering quality through design reviews, code reviews, and collaboration
- Work with product, design, operations, risk, compliance, sales, and many other teams

Tags: Engineering

Source: 1752vc Careers, https://www.1752.vc/careers/jobs/mercury-senior-software-engineer-cards/