Senior Site Reliability Engineer

Senior Site Reliability Engineer Sigma360 is seeking a Senior Site Reliability Engineer to help safeguard the availability, performance, and resilience of the platform our clients depend on. This is a hands-on engineering role embedded between our DevOps and Engineering teams where you will make our systems faster, and more durable; you will own incident response processes alongside the engineers who build the systems, and grow the observability and monitoring tooling that lets us understand production behavior at a glance. We are looking for an engineer who treats reliability as a product, proactively hunting down sources of inefficiency, toil, and risk before they turn into outages. This role is fully remote within the United States. About Sigma360 Sigma360 is a Series-B company that delivers software and data to combat financial crime within global financial institutions, fintechs, and companies who are on the front lines of managing risk. Our platform unifies global risk data, proprietary intelligence, screening technology, and AI automation into a single system that helps clients detect financial crime and make faster, better-informed risk decisions, protecting billions of dollars in assets and transactions across banking, payments, and global commerce. Key Responsibilities Profile production systems to identify performance issues or bugs by analyzing SQL queries and database performance, profiling application waits, tuning networks for latency. Partner with our DevOps and Engineering teams across the full incident lifecycle: drive response during live incidents, run blameless post-incident reviews, and turn each operational surprise into durable improvements in code, runbooks, or tooling. Improve the signal-to-noise ratio of our alerting by tuning thresholds, removing duplicate or low-value alerts, and codifying SLOs/SLAs that reflect actual customer impact. Build and operate the observability stack to allow engineers across the company to answer their own questions about production. Maintain and evolve our AWS infrastructure through Terraform, with a focus on safe, reviewable changes and reproducible environments. Must Have 5+ years of experience in an SRE, Production Engineering, DevOps, or similar role supporting production systems at meaningful scale (includes software development positions that had an on-call rotation) Degree in Computer Science or a closely related field Proficiency in Go / Golang, relational databases / SQL, and a scripting language of your choice AWS expertise, including containerized workloads on managed services Strong debugging skills inside of distributed backend systems Passion for improving observability and monitoring of production systems (ideally across multiple observability platforms) Ex perience participating in an on-call rotation, including incident command and post-incident review US-based Nice to Have (but not required) Background in financial services, payments, or regulatory technology Experience at an Enterprise SaaS firm What we offer Collaborative, low-ego culture focused on solving hard problems Remote-first team with high autonomy and ownership Opportunity to grow with a fast-scaling, product-led company Health, dental, vision, and other benefits Generous time off and a culture that supports learning and growth Equal opportunity Sigma360 is a proud equal opportunity employer. We are committed to fair hiring practices and to creating a welcoming environment for all team members. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, disability, age, familial status or veteran status.