Senior Backend Engineer

  • Connexis Group
  • 27/07/2026
Full time Information Technology Telecommunications Python CRM

Job Description

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.

Who you are
  • 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
What you'll own
  • 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