Senior Engineer - Infrastructure

Key Responsibilities

• Provide advanced Level 3 production support for business-critical One. Main Auto applications and supporting technology components.
• Troubleshoot complex application-hosting and system issues across Windows Server, IIS, SQL Server, Azure IaaS, authentication, connectivity, and dependent services.
• Build, configure, maintain, and improve the operating components used by One. Main Auto applications within approved enterprise standards.
• Serve as the Level 4 technical escalation point for external partners, vendors, and third-party service providers; coordinate complex technical investigations through resolution.
• Perform root cause analysis and implement corrective and preventive actions that improve long-term reliability and reduce recurring production issues.
• Partner with One. Main incident response teams as the technical subject matter expert for the supported systems without owning incident command or coordination.
• Improve observability through monitoring, logging, alerting, health checks, and operational telemetry.
• Identify and reduce operational toil through Power. Shell and other approved automation methods.
• Support deployments, configuration changes, patching, maintenance activities, and production readiness for One. Main Auto systems.
• Maintain strong working knowledge of network dependencies and cloud networking concepts and coordinate with dedicated network teams when changes or troubleshooting are required.
• Collaborate across application development, network, database, security, IAM, platform, cloud, and enterprise operations teams.
• Participate in an on-call rotation supporting production systems. Targeted Platform Engineering Responsibilities
• Develop reusable configurations, scripts, deployment patterns, and operational tooling that improve consistency and reliability.
• Contribute to standardization efforts that reduce configuration drift across environments.
• Support Infrastructure as Code practices where appropriate for repeatable provisioning and configuration.
• Contribute to modernization initiatives, including migration of suitable workloads toward containerized or managed runtime platforms.
• Partner with platform engineering teams to improve the operability, resilience, and lifecycle management of One. Main Auto workloads. Required Qualifications
• 5+ years of experience in production operations, site reliability engineering, systems/application support, or a closely related technical role.
• Strong hands-on experience supporting Windows Server in production environments.
• Strong working knowledge of IIS administration, configuration, troubleshooting, and application hosting.
• Working knowledge of Microsoft SQL Server from a production support and application operations perspective.
• Strong Power. Shell scripting and automation skills.
• Experience supporting Microsoft Azure environments with an emphasis on IaaS workloads.
• Strong understanding of network fundamentals, DNS, routing, firewalls, load balancing, TLS/certificates, and cloud connectivity sufficient to troubleshoot cross-system dependencies.
• Demonstrated ability to perform advanced troubleshooting and root cause analysis across complex, multi-tier systems.
• Experience working with external vendors or technology partners on high-severity technical escalations.
• Ability to coordinate work across multiple enterprise technology teams in a cloud-first environment.

Preferred Qualifications

• Experience with Infrastructure as Code tools such as Terraform, Bicep, ARM templates, or equivalent.
• Experience with containerization technologies such as Docker, Kubernetes, or Azure Kubernetes Service (AKS).
• Exposure to SRE practices such as service level indicators (SLIs), service level objectives (SLOs), error budgets, and toil reduction.
• Experience with CI/CD pipelines and production deployment automation.
• Experience supporting financial services or other regulated production environments.
• Relevant Microsoft Azure certifications. Core Competencies
• Production ownership and reliability mindset.
• Advanced systems-level troubleshooting and analytical thinking.
• Strong technical communication with internal teams, vendors, and external partners.
• Automation-first approach to repetitive operational work.
• Ability to operate effectively in high-availability, business-critical environments.
• Strong cross-team coordination and accountability. Business Focus This position supports One. Main Auto within OMFS Tech Ops & Eng Mgmt. The primary objective is to maintain reliable production operations while modernizing the application-hosting components and operational practices that support One. Main Auto systems. Who we Are One. Main Financial (NYSE: OMF) is the leader in offering nonprime customers responsible access to credit and is dedicated to improving the financial well-being of hardworking Americans. Since 1912, we’ve looked beyond credit scores to help people get the money they need today and reach their goals for tomorrow. Our growing suite of personal loans, credit cards and other products help people borrow better and work toward a brighter future. Driven collaborators and innovators, our team thrives on transformative digital thinking, customer-first energy and flexible work arrangements that grow lives, careers and our company. At every level, we’re committed to an inclusive culture, career development and impacting the communities where we live and work. Getting people to a better place has made us a better company for over a century. There’s never been a better time to shine with One. Main. Because team members at their best means One. Main at our best, we provide opportunities and benefits that make their health and careers a priority. That’s why we’ve packed our comprehensive benefits package for full- and some part-timers with:
• Health and wellbeing options including medical, prescription, dental, vision, hearing, accident, hospital indemnity, and life insurances
• Up to 4% matching 401(k)
• Employee Stock Purchase Plan (10% share discount)
• Tuition reimbursement
• Paid time off (15 days’ vacation per year, plus 2 personal days, prorated based on start date)
• Paid sick leave as determined by state or local ordinance, prorated based on start date
• Paid holidays (7 days per year, based on start date)
• Paid volunteer time (3 days per year, prorated based on start date) One. Main Holdings, Inc. is an Equal Employment Opportunity (EEO) employer. Qualified applicants will receive consideration for employment without regard to age, ancestry, citizenship status, color, creed, culture, disability, ethnicity, gender, gender identity or expression, genetic information or history, marital status, military status, national origin, nationality, pregnancy, race, religion, sex, sexual orientation, socioeconomic status, transgender or on any other basis protected by law.