Engineering
Senior Full-Stack Engineer
Remote (Global) Full-time $120,000–$170,000 USD / yr 0.5–1.5% equity
This role opens after our pre-seed round.
Everything below — scope, salary band, equity — is real and current. Join the pipeline at the bottom and you will hear from us first, before the role is ever posted publicly.
Own product surface end to end — from the Next.js client through the payment APIs to the on-chain settlement layer. You will be one of the first engineers on a codebase that already ships payments, travel booking and investing in one client.
What you will own
- Ship full features across the Next.js app, API routes and the TypeScript SDKs.
- Extend the x402 payment flows — 402 responses, EIP-3009 authorizations, settlement verification.
- Harden production paths: rate limiting, idempotent webhooks, session security, audit trails.
- Review PRs and set the engineering bar for everyone hired after you.
What we need to see
- 5+ years building production web applications, with deep TypeScript and React experience.
- You have owned systems that move money, or equivalently unforgiving domains.
- Comfortable reading Solidity even if you do not write it daily.
- Strong async written communication — we work remote-first across time zones.
Nice to have
- Experience with ERC-4337 account abstraction or WebAuthn/passkeys.
- Open-source track record — a merged PR into our repos fast-tracks you to the final round.
Be first in line
A merged PR into our open-source repos fast-tracks you to the final round. No whiteboard puzzles; under two weeks from application to decision.