Senior Site Reliability Engineer

About the Role

Sezzle's mission to financially empower the next generation has led to rapid growth, and the company is now seeking a talented engineer to help drive its technical vision forward. The ideal candidate will be a seasoned professional with a deep understanding of infrastructure and reliability, and a passion for delivering high-quality solutions.

The Senior Site Reliability Engineer will be part of a dynamic team that values innovation, collaboration, and operational excellence. With a strong focus on customer experience and technical excellence, Sezzle is an exciting place to work for professionals who are passionate about making a real impact.

What You Will Do

• Architect, upgrade, design, and build scalable infrastructure solutions leveraging Kubernetes, AWS, RDS (MySQL/Postgres), and modern distributed patterns.
• Help drive the infrastructure team's roadmap, leading to higher levels of reliability, recoverability, and scalability.
• Drive capacity planning, benchmarking, and work with the team to stress test systems, find bottlenecks, and prepare for further growth in the business.
• Define, maintain, and enforce SLAs and alerts across the infrastructure.
• Lead the team towards stronger signal anomaly detection, better, more flexible alerting.
• Help lead Sezzle's AI enablement efforts, identifying opportunities to apply AI and automation to enhance infrastructure reliability, developer productivity, and internal tooling.
• Build consistency and scalability across a distributed microservices architecture while maintaining performance and reliability.
• Establish and evolve engineering best practices for observability, security, and CI/CD across teams.
• Mentor engineers and champion a culture of learning, innovation, and operational excellence.
• Collaborate cross-functionally to translate business goals into technical roadmaps and deliver results that matter.

What We Are Looking For

• 6+ years of professional software engineering or infrastructure engineering experience, including significant SRE and backend experience.
• Deployed significant changes to a production application or infrastructure configuration in the past 30 days.
• Strong proficiency in Golang, with experience building and maintaining RESTful APIs.
• Expertise with SQL-based RDBMS (MySQL, PostgreSQL) and experience optimizing schema and queries for performance at scale.
• Proficiency in observability tools (Prometheus, Grafana, Datadog, New Relic).
• Solid understanding of distributed systems design patterns (e.g., transactional outbox, event-driven architecture, and stream processing, queues).
• Demonstrated ability to bring new ideas forward, influence decisions, and lead cross-functional teams.

Nice to Have

• Experience with containerization using Docker.
• Familiarity with agile development methodologies and version control systems like Git.
• Knowledge of security best practices and compliance frameworks.

Benefits and Perks

• Competitive salary and benefits package.
• Opportunities for professional growth and career advancement.
• Collaborative and dynamic work environment.
• Flexible working hours and remote work options.
• Access to cutting-edge technologies and tools.
• Recognition and rewards for outstanding performance.

• To stand out as a candidate, be prepared to showcase your technical expertise in infrastructure and reliability, and demonstrate your passion for delivering high-quality solutions.
• Familiarize yourself with Sezzle's technology stack and be prepared to discuss how you can contribute to the company's technical vision.
• Highlight your experience with Kubernetes, AWS, and distributed systems, and be prepared to provide specific examples of how you have applied these technologies in previous roles.
• Emphasize your ability to collaborate with cross-functional teams and drive technical roadmaps that deliver results.
• Be prepared to discuss your experience with observability tools and security best practices, and how you have applied these in previous roles.
• Show enthusiasm for Sezzle's mission and values, and demonstrate how your skills and experience align with the company's goals.