Senior Backend Engineer

Own the routing engine, billing infrastructure and webhook delivery. Python/FastAPI/MongoDB. We process every inbound lead through code you write - sub-100ms p99 latency, idempotent everything, audit-trail everything.

• 6+ years building production Python services - async/await fluent
• Deep MongoDB experience including indexing, aggregation, transactions
• Have built billing or payments infra you’re proud of
• Care about correctness - money flows through this code, * Own ping-tree v2 (multi-buyer parallel routing)
• Lead the CRM connector platform (HubSpot/Salesforce/Pipedrive)
• Set the engineering bar for the next 5 hires