Staff Software Engineer, Accounts & Ledgering (US)

What you'll do

• Design and operate a double-entry payment ledger and the next-generation account and ledger model, immutable events, derived balances, and clear semantics around payer balance vs. Patient balance vs. Adjustments vs. Cash, with invariants that make it structurally impossible to "print money"
• Take ownership of the full money path: insurance ledger, posting/adjustment engines, patient account ledgers, bank reconciliation, and reporting/AR
• Reconcile multiple sources of truth, billed charges, payer remittances, bank deposits, and financial reports, and surface discrepancies before customers do
• Scale idempotent, explainable posting and adjustment pipelines across high transaction volumes using negation/reversal semantics instead of mutable edits
• Operate money-critical systems on very large Postgres tables with safe migrations, trigger-driven projections, backfills, observability, and incident response where "eventually consistent" isn't acceptable
• Set the bar for observability and operational readiness, monitoring, logging, distributed tracing, dashboards, alerting, SLOs, and safe production rollouts
• Mentor Senior and Staff engineers, run architecture and design reviews, and push the technical bar higher through clear direction and honest feedback
• Own complex, cross-system initiatives end to end: architecture, implementation, migration, rollout, and production operations

What you need

• We need a Staff Software Engineer with 8+ years of experience building backend systems and 3+ years designing and operating financial systems from 0-to-1. We're looking for someone who has built a double-entry payment ledger that has deep expertise in accounts and ledgering, payments, billing, reconciliation, ledgers, or accounting. You should be comfortable owning the full architecture of money-critical systems at scale and have a track record of designing immutable, event-oriented data models where correctness is non-negotiable. Bonus points if you have healthcare RCM, insurance remittance (835/ERA), or bank reconciliation experience.

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