Systems Administrator, IT Infrastructure

Who We Are Cross River builds the infrastructure behind the world’s most innovative financial products. Our technology and capital solutions power payments, cards, lending, and digital asset capabilities that move money safely, instantly, and inclusively — trusted by leading fintechs, enterprises, and disruptors across the globe. Our mission is simple: to build the financial infrastructure that expands access and opportunity for all. Guided by a culture of collaboration, curiosity, and purpose, Cross River has been named one of American Banker’s Best Places to Work in Fintech year after year. Whether you’re designing code, solving regulatory puzzles, or developing strategy, you’ll join a team where innovation and integrity drive everything we do — and where your work helps shape the future of finance. What We're Looking For The Engineer II, IT Infrastructure Support serves as a foundational member of the IT operations team, providing day-to-day systems administration and technical support across the organization's infrastructure. This role is responsible for assisting in the maintenance, monitoring, and support of servers, networks, cloud services, and enterprise applications. The ideal candidate possesses a solid foundational understanding of Windows Server, Linux, networking fundamentals, Microsoft 365 administration, and cloud platforms, coupled with a strong eagerness to learn and grow. They demonstrate a proactive attitude toward problem-solving, maintain attention to detail, and collaborate effectively with senior engineers and cross-functional teams. In addition to operational support responsibilities, this role participates in project-based work through sprint planning and backlog initiatives, contributing to infrastructure maintenance, network operations, automation efforts, platform improvements, and continuous service enhancements under the guidance of senior team members. Key Responsibilities: Infrastructure & Network Support • Administer and maintain Windows and Linux server environments • Monitor system/network health and respond to alerts • Support server provisioning, patching, backup, and disaster recovery • Troubleshoot networking (TCP/IP, DNS, DHCP, VLANs, firewalls, VPNs, wireless) • Assist with cloud networking (VPC, subnets, route tables, gateways) • Support hybrid connectivity between on-prem and cloud environments Systems Administration • Windows Server (2019+), Linux (Ubuntu, CentOS, RHEL) • Active Directory, Group Policy, Microsoft 365 (Exchange, SharePoint, Teams) • Virtualization (VMware/Hyper-V), AWS services (EC2, S3, IAM, CloudWatch) • Manage user provisioning, access requests, and endpoint security Customer Service & Documentation • Provide professional, responsive support to internal users • Maintain thorough ticket documentation and knowledge base articles • Document system configurations, network diagrams, and change records Project & Continuous Improvement • Participate in Agile sprint planning and backlog activities • Contribute to automation and process improvement efforts Required Qualifications: • 2+ years in systems administration, networking, or related role • Knowledge of Windows Server, Linux, Active Directory, DNS, DHCP, Group Policy • Solid networking fundamentals (TCP/IP, subnetting, routing, VLANs, firewalls) • Foundational cloud systems and networking knowledge • Familiarity with Microsoft 365 • Strong communication, attention to detail, and customer service mindset • Physical requirement: Ability to lift a minimum of 50 lbs. Preferred Qualifications: • AWS, CompTIA Network+/Security+, CCNA, or Microsoft certifications • Experience with IaC (Terraform/CloudFormation), scripting (PowerShell/Bash/Python) • Familiarity with virtualization, backup s