Build payroll, bill-pay, bank-embedding, and accounting integrations. Design auditable double-entry ledgers, idempotent payment execution, reconciliation, and financial-correctness patterns. Collaborate with Platform Engineering and merchants, debug production discrepancies, and productionize AI-agent-assisted code.
Senior Software Engineer - Money Movement
About Santé
About the Team
About the Role
In this role, you will
Your background looks something like this
Even better
Compensation
Benefits
About Santé
Santé is the #1 operating system for local retailers.
Our platform runs the entire store — point of sale, integrated payments, eCommerce, inventory management, delivery-app integrations, marketing, bookkeeping, and AI Agents — so the owners of liquor, grocery, and convenience stores can compete like the big chains without losing what makes them local.
We're building a future where the corner liquor store has better technology than the national retailer: one place for selling to customers everywhere with AI agents that spots slow-moving inventory and creates the promotion to move it. Every feature we ship lands in real stores the same week, and the feedback loop is direct — our customers call us by name.
We move fast and ship daily. AI-assisted engineering isn't a talking point here; agents like Devin, Claude, and Codex are part of how the team works every day, and engineers who master that leverage ship multiples of what they could alone.
Money Movement owns everything at Santé that touches money after the sale: Payroll, Banking, and Lending.
Today that means the accounting backbone our merchants reconcile their businesses on — QuickBooks sync for invoices, bills, COGS journal entries, and sales mappings — plus the ledgers behind loyalty, gift cards, and deposits, where being off by a cent is a bug. Next it means payroll: our merchants run stores with hourly staff across multiple locations, and they want to pay their people from the same system that already knows every shift and every drawer count. This team is where Santé goes from recording our merchants' money to moving it.
You'll be one of the first engineers on Santé's payroll build, and a technical owner of the financial systems where correctness is non-negotiable: ledgers, accounting sync, and the money movement rails underneath them. This means designing systems an auditor could read — double-entry ledgers, idempotent payment execution, reconciliation that proves everything ties out — and debugging from ambiguous production signals ("this merchant's books are off by $0.47 since the 9th") down to root cause. You'll partner closely with Platform Engineering, whose sale write path your ledgers consume, and directly with store owners whose payrolls you'll run. Beyond building, you'll establish the financial-correctness patterns the rest of engineering adopts.
- Build Santé's payroll product from the ground up — earnings computed from shift data the platform already has, tax withholding, payment execution, and filings integrations
- Develop Santé’s bill pay product that moves our customers from paying their suppliers by check to one-click handling accounts payable directly in our platform
- Embed bank accounts directly into our OS so that our customers have access to their card processing revenues in minutes
- Own and harden our accounting integrations (QuickBooks today), where a sync bug shows up as a merchant's books not balancing at month-end
- Design and maintain the ledgers behind loyalty, gift cards, and deposits — correct, idempotent, and auditable under concurrent writes
- Establish the financial-correctness patterns (double-entry ledgers, idempotency keys, reconciliation jobs, timezone cutoffs) that other teams adopt
- Multiply your output with AI agents: direct, review, and productionize agent-written code as a core part of your workflow — with the guardrails money-touching code demands
Your background looks something like this
- 5+ years building production backend systems, ideally in TypeScript/Node — though we care more that you write correct, reviewable code in any language
- Practical fluency with transactional guarantees: idempotency, atomicity, retry semantics, and what happens when a webhook arrives twice
- Real depth in PostgreSQL: schema design an auditor could follow, transactions under concurrency, and queries that stay fast as ledgers grow
- An instinct for the unglamorous parts of money — reconciliation, rounding, tax rates with three decimals — done exactly right
- A bias for root cause over patch, and a track record of turning one-off incidents into eliminated bug classes
- Comfort operating with high ownership in a small team where your decisions become the standard
Even better
- Experience with payroll, banking, ledger, or other financial systems where an auditor has actually read your data model
- Experience with accounting integrations (QuickBooks, NetSuite, Xero), payment processors, or ACH rails
- Familiarity with our stack: Next.js, tRPC, Prisma, Vercel, ElastiCache, RDS/RDS Proxy
- Experience directing AI coding agents (Devin, Claude Code, Cursor) and building the guardrails that make them safe at scale
- Retail or POS domain experience, especially multi-location operations or cash reconciliation
- History of establishing technical standards or architectural principles adopted across teams
Compensation
$220k – $300k + Meaningful equity
This range reflects the expected compensation for this role. Compensation within the range is determined based on experience, skills, and scope of responsibilities. In addition to base salary, we offer meaningful early-stage equity — this team's work is the foundation the company compounds on.
- Fully company-covered medical and dental benefits.
- 401(k)
- Catered Lunches and Dinners: Santé provides dinner each evening for employees who would like to eat and connect with the team. Lunch is provided on a weekly basis.
Santé (YC S23) New York, New York, USA Office
New York, NY, United States, 10001
Similar Jobs
Artificial Intelligence • Professional Services • Business Intelligence • Consulting • Cybersecurity • Generative AI
Develop and implement data solutions, pipelines, architectures, analytics, reports, and dashboards for clients. Apply Python, Java, ETL, business intelligence, and advanced analytics techniques to interpret complex data, improve operations, and support strategic decisions. Collaborate with stakeholders, manage client relationships, identify data challenges, and deliver high-quality managed services work while contributing to continuous process improvement.
Top Skills:
Amazon RedshiftAWSChange Data CaptureDatastageDb2ETLGoldengateJavaOracle Business IntelligencePythonQlikviewSQL ServerWorkload Scheduler
Artificial Intelligence • Professional Services • Business Intelligence • Consulting • Cybersecurity • Generative AI
Leads healthcare operations consulting engagements by analyzing client needs, developing operational strategies, improving processes, managing transformation projects, and using analytics to enhance performance. Oversees planning, budgeting, resources, stakeholder engagement, and service delivery while coaching teams, managing conflicts, supporting change initiatives, and identifying business opportunities.
Artificial Intelligence • Professional Services • Business Intelligence • Consulting • Cybersecurity • Generative AI
Evaluates clients’ digital environments, internal controls, cybersecurity measures, governance, and regulatory compliance. Performs audit and assurance assessments, data quality testing, and digital asset reviews while interpreting data to develop recommendations. Builds client relationships, collaborates with teams, leverages cloud and AI platforms, and maintains professional, technical, and independence standards.
Top Skills:
Artificial Intelligence PlatformsBlockchainCloud EngineeringCybersecurityDigital Assets
What you need to know about the NYC Tech Scene
As the undisputed financial capital of the world, New York City is an epicenter of startup funding activity. The city has a thriving fintech scene and is a major player in verticals ranging from AI to biotech, cybersecurity and digital media. It also has universities like NYU, Columbia and Cornell Tech attracting students and researchers from across the globe, providing the ecosystem with a constant influx of world-class talent. And its East Coast location and three international airports make it a perfect spot for European companies establishing a foothold in the United States.
Key Facts About NYC Tech
- Number of Tech Workers: 549,200; 6% of overall workforce (2024 CompTIA survey)
- Major Tech Employers: Capgemini, Bloomberg, IBM, Spotify
- Key Industries: Artificial intelligence, Fintech
- Funding Landscape: $25.5 billion in venture capital funding in 2024 (Pitchbook)
- Notable Investors: Greycroft, Thrive Capital, Union Square Ventures, FirstMark Capital, Tiger Global Management, Tribeca Venture Partners, Insight Partners, Two Sigma Ventures
- Research Centers and Universities: Columbia University, New York University, Fordham University, CUNY, AI Now Institute, Flatiron Institute, C.N. Yang Institute for Theoretical Physics, NASA Space Radiation Laboratory
