Engineering Backend Engineer — Payments

Integrate and operate payment providers across 50+ rails. Your work focuses on correctness — idempotency, reconciliation, and settlement — plus the operational practices that keep those guarantees true in production.

What you'll own

• Design and implement adapters and protocol handlers for diverse payment rails and providers.
• Build idempotent APIs, retry/backoff policies, and distributed coordination to prevent duplicate effects.
• Implement reconciliation pipelines and settlement logic that produce auditable reports and discrepancies.
• Maintain monitoring, alerting, and runbooks for payment flows, including automated checks and manual investigation steps.
• Create test harnesses and simulations to validate failure modes, timeouts, and edge cases before deploy.

A typical week

• Deliver code to support a new provider or feature, with unit and integration tests.
• Triage and resolve reconciliation mismatches and settlement exceptions with ops and client success.
• Review incidents, update runbooks, and improve observability for recurring failure patterns.
• Collaborate with product, client success, and engineering to prioritise rails and operational SLAs.

What we look for

• Practical experience building or operating payment integrations, settlement, or ledger systems.
• Strong understanding of idempotency, retries, transactions, and distributed failure modes.
• Comfortable working with SQL/ledger models, batch processing, and reconciliation logic.
• Hands‑on operational discipline: alerts, runbooks, postmortems, and automated tests for failure paths.