Sezzle · 14 hours ago
Principal Site Reliability Engineer
United States
Full-time
Remote
Lead/Staff
$200K/yr - $260K/yr
12+ years expSezzle is a fintech company focused on revolutionizing the shopping experience through innovative payment solutions. They are seeking a Principal Site Reliability Engineer to architect and enhance their infrastructure, drive reliability and scalability, and mentor engineering teams to improve operational excellence.
E-CommerceFinancial ServicesFinTechMobile PaymentsPayments
Responsibilities
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 us to higher levels of reliability, recoverability, and scalability
Drive capacity planning, benchmarking, and work with the team to stress test our systems, find bottlenecks, and prepare for further growth in the business
Define, maintain and enforce SLAs and alerts across our infrastructure
Lead the teams 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 in 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
Qualification
Required
12+ 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 complex technical initiatives
Bachelor's degree in Computer Science or equivalent practical experience
Preferred
Experience with AWS cloud infrastructure, mainly AWS Aurora RDS, both MySQL and Postgres
Experience with data engineering, data pipelines and data warehousing
Experience with CI/CD pipelines and deploying containerized microservices in Kubernetes
Familiarity with AI developer tooling like Claude Code, Gemini CLI, Codex, Cursor and using it to be a more productive engineer
Track record of shipping commercial APIs and data-driven applications in high-growth environments
Proven leadership in guiding technical direction, improving system reliability, and scaling high-traffic services
Benefits
Unlimited PTO, volunteer hours and sabbatical
Life, STD/LTD, medical, dental and vision insurance
Highly discounted LifeTime gym membership
401k with match
Collaborative fun co-workers
The opportunity to join the fastest growing FinTech alongside a team of motivated and driven individuals
Company
Sezzle
Sezzle provides a buy now, pay later solution platform.
201-500 employees
H1B Sponsorship
Sezzle has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (17)
2024 (11)
2023 (15)
2022 (24)
2021 (9)
2020 (12)
Funding
Current Stage
Public CompanyTotal Funding
$626.6MKey Investors
DiscoverBastion Management
2024-05-17Post Ipo Debt· $225M
2022-10-18Post Ipo Debt· $100M
2021-07-15Post Ipo Equity· $30M
Leadership Team
Charlie Youakim
CEO
Karen Miller Hartje
CFO
Recent News
2026-01-22
2025-12-28
The Motley Fool
2025-12-24
Company data provided by crunchbase