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# DescriptionStaff Software Engineer, Accounts & Ledgering

- **Company:** MISSION & MISSION, LLC
- **Location:** Los Angeles, CA, United States
- **Experience:** Experienced
- **Salary:** $210,000.0 - $275,000.0
- **Contract:** Permanent contract
- **Skills:** Application Programming Interfaces (APIs), Python (Programming Language), PostgreSQL, SQL Databases, Backend, Event Driven Architecture, Restful APIs, Dynatrace
- **Published:** September 24, 2026
- **Apply:** https://www.thejobnetwork.com/job/1c365db4-6539-4e51-ab40-9b7a9b4c91c2/staff-software-engineer-accounts-ledgering

## About the Role

* 8+ years building backend systems, including 3+ years designing and operating financial systems from 0 to 1
 * Hands-on experience building a double-entry payment ledger
 * Deep expertise in payments, billing, reconciliation, ledgers or accounting
 * Immutable, event-oriented data modeling where correctness is non-negotiable
 * Strong Python, PostgreSQL and SQL

Nice to Have

 * Healthcare revenue cycle, insurance remittance (835/ERA) or bank reconciliation experience

Tech Stack

Python, PostgreSQL, event-driven architecture, SQL, REST APIs, distributed tracing, CDC, bank APIs, BAI2, OCR

## Description

Commure is hiring a Staff Software Engineer (8+ years backend, 3+ years building financial systems from 0 to 1) who has built a double-entry payment ledger and has deep expertise in accounts and ledgering: payments, billing, reconciliation, ledgers or accounting. You will own the full architecture of money-critical systems at scale, with immutable, event-oriented data models where correctness is non-negotiable.

What You Will Do

 * Design and operate a double-entry payment ledger and the next-generation account and ledger model, with invariants that make it structurally impossible to "print money".
 * Own the full money path: insurance ledger, posting and adjustment engines, patient account ledgers, bank reconciliation and AR reporting.
 * Reconcile billed charges, payer remittances, bank deposits and financial reports, and surface discrepancies before customers do.
 * Scale idempotent, explainable posting pipelines using negation/reversal semantics.
 * Operate money-critical systems on very large Postgres tables with safe migrations, projections, backfills and incident response.
 * Set the bar for observability and operational readiness, and mentor senior and staff engineers.


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