Senior Software Engineer

<h3>Job Description</h3><div><p><strong>Senior Software Engineer</strong></p>\n<p><strong>$200,000 - $300,000 Base Salary + Equity</strong></p>\n<p><br /></p>\n<p><strong>New York City | In Office</strong></p>\n<p>A high-growth, venture-backed software company is hiring a <strong>Senior Software Engineer, Money Movement</strong> to help build the financial infrastructure behind its platform. You'll work across <strong>payroll, banking, payments, accounting, and ledger systems</strong>, building products responsible for moving and accurately tracking real money.</p>\n<p><br /></p>\n<p>You'll join a highly technical engineering team building financial products from the ground up, with ownership over systems where <strong>correctness, reliability, and auditability are non-negotiable</strong>. This is an opportunity to tackle complex fintech problems while directly shaping the architecture and technical standards behind a rapidly growing platform.</p>\n<p><br /></p>\n<p><strong>What You'll Be Doing</strong></p>\n<ul>\n <li>Build a <strong>payroll product from the ground up</strong>, including earnings calculations, tax withholding, payment execution, and filing integrations</li>\n <li>Develop <strong>bill pay and accounts payable infrastructure</strong> that allows customers to pay suppliers directly through the platform</li>\n <li>Build <strong>embedded banking</strong> capabilities that give customers faster access to their funds</li>\n <li>Own and scale <strong>accounting integrations</strong>, including synchronization of invoices, bills, journal entries, and sales data</li>\n <li>Design <strong>double-entry ledgers</strong> supporting financial products such as deposits, loyalty, and stored value</li>\n <li>Build systems around <strong>idempotency, reconciliation, atomicity, concurrent transactions, and financial correctness</strong></li>\n <li>Establish engineering standards for money movement that can be adopted across the broader organization</li>\n <li>Leverage modern <strong>AI coding agents</strong> while maintaining the guardrails required for production financial systems</li>\n</ul>\n<p><br /></p>\n<p><strong>Highlights</strong></p>\n<p>💸 <strong>Build Money Movement Products from 0→1</strong> – Help launch new payroll, banking, and bill pay products from the ground up</p>\n<p>🏦 <strong>Embedded Banking &amp; Payments</strong> – Build infrastructure that moves real customer funds and powers critical financial workflows</p>\n<p>📒 <strong>Ledgers &amp; Financial Correctness</strong> – Design auditable double-entry ledger systems where being off by even a cent matters</p>\n<p>💰 <strong>Build Payroll from Scratch</strong> – Own core payroll infrastructure spanning earnings, tax withholding, payments, and filing integrations</p>\n<p>🔄 <strong>Accounting Infrastructure</strong> – Build and scale integrations with platforms such as QuickBooks and other accounting systems</p>\n<p>🐘 <strong>Deep PostgreSQL Engineering</strong> – Design transactional schemas and concurrency-safe systems capable of supporting growing financial workloads</p>\n<p>🤖 <strong>AI-First Engineering Culture</strong> – Use modern AI coding agents as part of the everyday development workflow</p>\n<p>🚀 <strong>High Ownership &amp; Impact</strong> – Join a small engineering team where your architectural decisions can become company-wide standards</p>\n<p><br /></p>\n<p><strong>What They're Looking For</strong></p>\n<ul>\n <li><strong>5+ years</strong> of experience building production backend systems</li>\n <li>Strong backend engineering experience, ideally with <strong>TypeScript / Node.js</strong></li>\n <li>Deep understanding of <strong>transactional systems</strong>, including idempotency, atomicity, retries, concurrency, and failure handling</li>\n <li>Strong experience with <strong>PostgreSQL</strong>, including schema design, transactions, and performance at scale</li>\n <li>Experience building systems where <strong>financial correctness and data integrity</strong> are critical</li>\n <li>Track record of debugging complex production problems and solving the underlying root cause</li>\n <li>Ability to independently own complex technical projects from architecture through production</li>\n</ul>\n<p><br /></p>\n<p><strong>Nice to Have</strong></p>\n<ul>\n <li>Experience building <strong>payroll, banking, payments, ledger, or other financial systems</strong></li>\n <li>Experience with accounting platforms such as <strong>QuickBooks, NetSuite, or Xero</strong></li>\n <li>Experience with <strong>payment processors, ACH, reconciliation, or money movement infrastructure</strong></li>\n <li>Familiarity with <strong>Next.js, tRPC, Prisma, Vercel, ElastiCache, RDS, or RDS Proxy</strong></li>\n <li>Experience working with AI coding tools such as <strong>Devin, Claude Code, or Cursor</strong></li>\n <li>Background in <strong>retail, POS, multi-location operations, or cash reconciliation</strong></li>\n <li>Experience establishing technical or architectural standards across engineering teams</li>\n</ul>\n<p><br /></p>\n<p><strong>Compensation &amp; Benefits</strong></p>\n<ul>\n <li><strong>$200,000 - $300,000 base salary</strong></li>\n <li><strong>Meaningful equity package</strong></li>\n <li>Fully company-covered <strong>medical and dental benefits</strong></li>\n <li><strong>401(k)</strong></li>\n <li>Catered meals</li>\n <li>High-impact role with significant technical ownership</li>\n <li>Opportunity to build foundational financial products from the ground up</li>\n</ul>\n<p><br /></p></div>