Teams at Sezzle

Lead backend development and ownership of acquiring and payment-processing systems. Build fault-tolerant Go services for authorization, settlement, reconciliation, refunds, and disputes. Integrate with processors/gateways, operate within PCI DSS scope, instrument payment health, use LLM tools like Claude, and mentor engineers while driving production-ready, auditable money-movement flows.

Senior backend-focused engineer responsible for designing and delivering features in Go and React, building scalable distributed architectures, mentoring teammates, coordinating with product and business stakeholders, instrumenting production systems, and leading small teams to ship high-quality APIs and services.

As a Senior Site Reliability Engineer, you will design and implement scalable infrastructure solutions, enhance reliability and performance, and lead AI enablement efforts within the team.