Jobs at Sezzle

Leads the technical vision, architecture, development, and migration strategy for Sezzle’s authentication and authorization platform. Designs scalable Go-based API gateways and identity services using AWS and SQL databases, establishes OAuth2/OIDC and authorization standards, drives secure zero-downtime migrations, and ensures reliability, observability, and regulatory compliance. The role also mentors engineers, influences cross-functional technical roadmaps, participates in on-call and incident response, and promotes responsible AI-assisted development for security-critical systems.

Architect and operate scalable, reliable infrastructure across Kubernetes, AWS, RDS, and distributed microservices. Lead capacity planning, benchmarking, observability, alerting, SLA enforcement, security, CI/CD, and infrastructure roadmap initiatives. Apply AI and automation to improve reliability and developer productivity. Optimize databases and production systems, identify bottlenecks, mentor engineers, and translate business objectives into technical roadmaps. The role requires strong Golang, backend, SRE, distributed systems, database, and cloud expertise.

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.

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.