Senior Money Movement Engineer - Payroll & Ledger Systems

Sante Technologies, Inc.; New York (NY); On-site; USD 220,000 - 300,000; Full time

Benefits offered by this job

Fully company-covered medical and dent

401(k)

Catered Lunches and Dinners

Job summary

Santé Technologies, Inc. is seeking a Senior Software Engineer to own the payroll money movement stack, focusing on double-entry ledgers, idempotent payment execution, and reliable reconciliation across payroll, banking, and lending features.

You will collaborate with Platform Engineering and store owners, design auditable financial systems, and set patterns that other teams adopt, while shipping fast in a data-sensitive environment.

Qualifications

• 5+ years building production backend systems.
• Practical fluency with transactional guarantees: idempotency, atomicity, retry semantics.
• Real depth in PostgreSQL: schema design, concurrency, and fast queries as ledgers grow.
• An instinct for the unglamorous parts of money: reconciliation, rounding, three decimals of tax.
• A bias for root-cause over patch and a track record of eliminating bug classes.
• Comfort operating with high ownership in a small team where decisions set the standard.

Responsibilities

• Build Santé's payroll product from the ground up - earnings from shift data, tax withholding, payment execution, and filings integrations
• Develop Santé’s bill pay product enabling one-click accounts payable in the platform
• Embed bank accounts into our OS so customers access card processing revenues quickly
• Own and harden our accounting integrations (QuickBooks today)
• Design and maintain ledgers behind loyalty, gift cards, and deposits with idempotency and auditability
• Establish financial-correctness patterns (double-entry ledgers, idempotency keys, reconciliation jobs) for other teams
• Multiply output with AI coding agents while maintaining money-focused guardrails

Skills

Backend systems

TypeScript/Node

PostgreSQL

Idempotency

Transactional integrity

Root-cause analysis

Ownership

Tools

Next.js

tRPC

Prisma

Vercel

RDS/Proxy

ElastiCache

Job description

Santé Technologies, Inc. is seeking a Senior Software Engineer to own the payroll money movement stack, focusing on double-entry ledgers, idempotent payment execution, and reliable reconciliation across payroll, banking, and lending features.

You will collaborate with Platform Engineering and store owners, design auditable financial systems, and set patterns that other teams adopt, while shipping fast in a data-sensitive environment.