Senior Site Reliability Engineer

Crexi•Los Angeles, CA

4d•$160,000 - $214,000

About The Position

The Senior Site Reliability Engineer leads the reliability, performance, and scalability of Crexi's infrastructure. The role fabricates, builds, and maintains robust and resilient systems while driving observability and proactive health monitoring across the platform. The Senior SRE acts as an escalation point and technical authority during incidents, leading efforts to minimize downtime and optimize system performance. As a senior technical leader, the Senior SRE champions a culture of reliability, efficient post-mortems, continuous improvement, and effective deployment practices, while mentoring junior and mid-level engineers on the team.

Requirements

BS degree in Computer Science or equivalent relevant work experience.
5+ years of experience operating infrastructure, with at least 2 years in a senior or lead SRE/infrastructure capacity.
Advanced proficiency in a programming language, such as Python, Go, C#, or Typescript.
Deep experience with infrastructure best practices including infrastructure-as-code, security auditing, cost optimization and FinOps, CI/CD automation, pipeline architecture, version control, code review, SLO/SLI/error budget management, alerting, and incident response.
Thorough knowledge of Linux system administration and internals.
Thorough knowledge of Docker/containers and Kubernetes/container orchestration, including cluster management and platform-level design.
Expert-level experience with infrastructure-as-code tooling such as Terraform, CloudFormation, or Pulumi.
Experience designing and managing database systems at scale, including performance tuning and high availability configurations.
Extensive experience managing cloud infrastructure, ideally AWS and at least one additional cloud provider (GCP, Azure).
Strong software development background with experience contributing to production-grade systems.
Demonstrated experience operating and scaling infrastructure in high-growth or fast-moving startup environments.
Experience defining and implementing observability platforms including logging, metrics, tracing, and alerting strategies.

Responsibilities

Leads the design and development of self-service infrastructure-as-code tooling, enabling engineering teams to manage and provision infrastructure autonomously and at scale.
Architects and drives automation frameworks for provisioning, configuration management, deployment, and monitoring, significantly reducing manual intervention and improving operational efficiencies across the organization.
Serves as a subject matter expert across a broad range of infrastructure domains including networking, storage, compute/containers, and security, providing guidance and escalation support to the broader engineering organization.
Leads code reviews and sets standards for infrastructure changes, ensuring quality, security, and maintainability.
Owns and drives architectural designs and planning discussions, influencing platform-wide decisions and long-term roadmap.
Partners closely with software engineering leadership to define and improve reliability standards, SLOs, SLIs, and error budgets for software products.
Leads the evaluation, selection, and management of relationships with third-party service providers, ensuring reliability, security compliance, and cost-effectiveness of external services.
Authors and maintains comprehensive documentation for system architecture, runbooks, processes, and best practices to facilitate knowledge sharing, onboarding, and organizational resilience.
Owns and evolves Crexi's cloud infrastructure strategy, with a focus on scalability, security, cost optimization, and operational excellence.
Mentors and develops junior and mid-level SRE and infrastructure engineers through code reviews, pairing, and technical guidance.
Drives incident response, post-mortem processes, and reliability improvement initiatives across the engineering organization.
Performs other duties as assigned.