Senior Database Reliability Engineer

About the role

Sezzle is looking for a technically strong, hands‑on Senior Database Reliability Engineer to design, build and scale the database platform that powers its applications. This role blends deep database knowledge with software and infrastructure engineering to make database usage reliable, secure and easy for developers.

Key responsibilities

• Design, build and maintain shared database platform components such as connection packages, client libraries, migration tooling and safety checks.
• Establish scalable patterns for services to connect to relational databases across all environments.
• Partner with backend teams to improve connection lifecycle, transaction handling, retries, pooling and query patterns.
• Automate database operations, create guardrails for migrations and improve observability, dashboards and alerts.
• Architect and manage AWS RDS/Aurora MySQL and PostgreSQL infrastructure, including proxies, read replicas, backups and failover.

Required profile

• 6+ years of professional experience in software, infrastructure, database or SRE engineering.
• Proven ability to ship production‑quality internal tools and platform components used by other engineers.
• Hands‑on experience with high‑availability MySQL and/or PostgreSQL environments.
• Experience working with AWS RDS/Aurora and related proxy technologies.

Required skills

• Programming languages: Go, Python, TypeScript.
• Relational databases: MySQL, PostgreSQL.
• Cloud services: AWS RDS, Aurora, RDS Proxy.
• Proxy technologies: PgBouncer, ProxySQL.
• Infrastructure as code and CI/CD: Terraform, GitLab CI/CD, Kubernetes, Helm.
• Large language model tools: Claude or equivalent.