Senior Software Engineer, Money Movement
$220,000 – $300,000 Base Salary + Equity
New York City | In Office
A high-growth, venture-backed software company is hiring a Senior Software Engineer, Money Movement to help build the financial infrastructure behind its platform. You’ll work across payroll, banking, payments, accounting, and ledger systems , building products responsible for moving and accurately tracking real money. [Senior Sof…(NYC).pdf | PDF]
You’ll join a highly technical engineering team building financial products from the ground up, with ownership over systems where correctness, reliability, and auditability are non-negotiable . This is an opportunity to tackle complex fintech problems while directly shaping the architecture and technical standards behind a rapidly growing platform.
What You’ll Be Doing
Build a payroll product from the ground up , including earnings calculations, tax withholding, payment execution, and filing integrations
Develop bill pay and accounts payable infrastructure that allows customers to pay suppliers directly through the platform
Build embedded banking capabilities that give customers faster access to their funds
Own and scale accounting integrations , including synchronization of invoices, bills, journal entries, and sales data
Design double-entry ledgers supporting financial products such as deposits, loyalty, and stored value
Build systems around idempotency, reconciliation, atomicity, concurrent transactions, and financial correctness
Establish engineering standards for money movement that can be adopted across the broader organization
Leverage modern AI coding agents while maintaining the guardrails required for production financial systems
Highlights
💸 Build Money Movement Products from 0→1 – Help launch new payroll, banking, and bill pay products from the ground up
🏦 Embedded Banking & Payments – Build infrastructure that moves real customer funds and powers critical financial workflows
📒 Ledgers & Financial Correctness – Design auditable double-entry ledger systems where being off by even a cent matters
💰 Build Payroll from Scratch – Own core payroll infrastructure spanning earnings, tax withholding, payments, and filing integrations
🔄 Accounting Infrastructure – Build and scale integrations with platforms such as QuickBooks and other accounting systems
🐘 Deep PostgreSQL Engineering – Design transactional schemas and concurrency-safe systems capable of supporting growing financial workloads
🤖 AI-First Engineering Culture – Use modern AI coding agents as part of the everyday development workflow
🚀 High Ownership & Impact – Join a small engineering team where your architectural decisions can become company-wide standards
What They’re Looking For
5+ years of experience building production backend systems
Strong backend engineering experience, ideally with TypeScript / Node.js
Deep understanding of transactional systems , including idempotency, atomicity, retries, concurrency, and failure handling
Strong experience with PostgreSQL , including schema design, transactions, and performance at scale
Experience building systems where financial correctness and data integrity are critical
Track record of debugging complex production problems and solving the underlying root cause
Ability to independently own complex technical projects from architecture through production
Nice to Have
Experience building payroll, banking, payments, ledger, or other financial systems
Experience with accounting platforms such as QuickBooks, NetSuite, or Xero
Experience with payment processors, ACH, reconciliation, or money movement infrastructure
Familiarity with Next.js, tRPC, Prisma, Vercel, ElastiCache, RDS, or RDS Proxy
Experience working with AI coding tools such as Devin, Claude Code, or Cursor
Background in retail, POS, multi-location operations, or cash reconciliation
Experience establishing technical or architectural standards across engineering teams
Compensation & Benefits
$220,000 –…