Principal Infra Engineer — Remote (Poland)

Sezzle; Poland; Remote; PLN 520,000 - 866,000; Full time

Job summary

Sezzle is seeking a Principal Infrastructure Engineer to design, build, and operate scalable infrastructure powering our fintech platform. You will own architecture across AWS, Kubernetes, and Aurora RDS, driving performance, reliability, and cost efficiency.

You will lead on-call efforts, incident recovery, and disaster planning while delivering AI-assisted tooling and automated, resilient workflows. You will collaborate with engineering, Security, and Compliance to align infrastructure with

Qualifications

• Bachelor's degree in Computer Science or similar technical field is required.
• 12+ years of hands-on experience across infrastructure and platform engineering at scale.
• Deep expertise with AWS and Kubernetes in production environments.
• Strong coding and automation skills in Golang or Python; IaC with Terraform.

Responsibilities

• Own the technical architecture and evolution of core infrastructure and services.
• Scale and optimize AWS, Kubernetes, and databases for growth in traffic and data volume.
• Lead incident response, on-call participation, and postmortems to drive reliability improvements.
• Build infrastructure-as-code and automation to reduce toil and enable safe deployments.
• Develop AI-assisted tooling for incident investigation and capacity planning.

Skills

Golang

Python

AWS

Kubernetes

CI/CD

Linux

Networking

Observability

Education

Bachelor's degree in Computer Science or equivalent

Tools

Terraform

Git

Prometheus

Grafana

Job description

Sezzle is seeking a Principal Infrastructure Engineer to design, build, and operate scalable infrastructure powering our fintech platform. You will own architecture across AWS, Kubernetes, and Aurora RDS, driving performance, reliability, and cost efficiency.

You will lead on-call efforts, incident recovery, and disaster planning while delivering AI-assisted tooling and automated, resilient workflows. You will collaborate with engineering, Security, and Compliance to align infrastructure with