Senior Fullstack Engineer, Payments

Series B Consumer Marketplace • Remote (US only)

Location

Remote (United States only)

Compensation

$140k–$180k base + competitive equity · fully remote, US only

About the company

Our client is a Series B consumer marketplace building the real-time payments and double-entry ledger rails behind a high-value trading platform. The money moving through the system is not micro-transactions — individual transfers routinely run into six figures — so the ledger and the payment rails underneath it are the product, not plumbing bolted on beside it. They have raised north of $100M and are backed by some of the best-known names in payments infrastructure.

The role

You would own money movement: the real-time payment flows and the double-entry ledger that has to reconcile against them, every time. It is a backend-heavy full-stack seat — roughly 70% backend — in Python and TypeScript, with React on the front end. The hiring manager is explicit that this is an AI-native team: daily use of AI coding tools is expected, not tolerated, and she weighs demonstrated AI fluency more heavily than a strict year count.

What you'll do

Build and own real-time payment flows moving large sums — $100K+ transfers, not micro-transactions
Design and maintain the double-entry ledger the whole platform reconciles against
Work backend-heavy full-stack in Python and TypeScript, with React on the front end
Integrate and harden payment processors and money-movement infrastructure
Use AI coding tools daily as a genuine multiplier on your own output

What we're looking for

These are hard requirements. Check each one that applies to you.

I've personally worked on real-time payments or large-value ACH — $100K+ transfers, not micro-transactions
My payments experience is not card checkout, subscription billing or SaaS invoicing
I use AI coding tools every day and can say concretely how they speed my output up
I live in the United States — the role is fully remote but US-only, and Canada is excluded
I need no new visa sponsorship — an OPT or H1B transfer is fine, a brand-new sponsorship is not

Please note: every item above is a hard requirement for this role. Applications that don't meet all of them will be rejected. We recommend applying only if you check every box.

Don't check every box? No worries — submit your info here and we'll keep you in mind for roles that could be a better fit.

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Nice to have

Around four or more years of full-stack engineering on systems that move large sums of money
Time at a fintech with a two-sided ledger or marketplace — a crypto exchange, neobank or trading platform
Something built greenfield, or having been one of the first ten engineers somewhere
React Native or other mobile work alongside the web front end

Tech stack

Python and TypeScript, PostgreSQL, React, AWS, and Stripe.

Compensation & logistics

$140k–$180k base + competitive equity — the hiring manager has said she does not hire at the floor of the band
Fully remote, but United States only — the client will not hire outside the US, and Canada is excluded
Visa transfers (OPT, H1B) are fine; a brand-new sponsorship is not offered
No travel — the role is 100% remote
1 hire planned

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