Sharetru is a secure managed file transfer (MFT) platform trusted by organizations with high security, compliance, and availability requirements. We operate infrastructure across multiple data centers and network providers while supporting customers subject to SOC 2, HIPAA, and FedRAMP-aligned controls.

Our environment is Linux-first, security-focused, and built for reliability at scale. This role is for someone who thrives in complex systems, values automation, and understands that production stability matters more than clever shortcuts.

Why This Role Matters

This role is critical to the reliability and security of Sharetru’s platform. The systems you manage directly support customer data, compliance commitments, and business continuity. We’re looking for someone who understands that good infrastructure is quiet, boring, and deliberate.

What You'll Do

As a Senior Systems Administrator, you will be responsible for the design, operation, hardening, and reliability of our Linux infrastructure across multiple networks and data centers including:

• Administer and harden Red Hat Enterprise Linux/Rocky Linux systems across production, staging, and internal networks
• Operate infrastructure spanning multiple data centers, including segmented networks, DMZs, and private backend tiers
• Manage and secure services including:

• Apache / PHP-FPM
• SFTP / FTPS (ProFTPD or equivalent)
• MySQL / Percona (including Galera clusters and proxies)
• HAProxy / reverse proxies / WAF-style architectures
• Design and maintain high-availability and fault-tolerant systems
• Implement and maintain security controls:
• SELinux (enforcing, custom policies)
• iptables / nftables / ipset
• TLS hardening (FIPS-aware where applicable)
• MFA, access controls, and least-privilege enforcement
• Support and contribute to compliance efforts (SOC 2, HIPAA, FedRAMP-aligned controls), including evidence collection and control validation
• Automate system configuration and maintenance using Ansible, shell scripting, and/or Python
• Troubleshoot complex production issues across OS, network, and application layers
• Participate in change management, incident response, and root cause analysis
• Collaborate closely with engineering, support, and compliance teams to keep systems stable, secure, and auditable
• Log into systems, read logs, understand packet flow, and know why something is not working as expected.