About the job
At Sharetru, we provide a highly secure managed file transfer (MFT) platform that organizations trust for its stringent security, compliance, and availability standards. Our robust infrastructure operates across multiple data centers and network providers, ensuring that we meet the needs of clients who require adherence to SOC 2, HIPAA, and FedRAMP-aligned controls.
We maintain a Linux-first environment that prioritizes security and reliability at scale. This position is ideal for someone who excels in navigating complex systems, appreciates the value of automation, and recognizes that production stability is paramount over clever shortcuts.
Why This Role is Vital
This position is essential to the reliability and security of Sharetru’s platform. The systems you will manage directly support customer data, compliance commitments, and business continuity. We seek an individual who understands that effective infrastructure is often understated, stable, and methodical.
Your Responsibilities
As a Senior Systems Administrator, you will oversee the design, operation, hardening, and reliability of our Linux infrastructure across various networks and data centers, including:
- Administering and securing Red Hat Enterprise Linux/Rocky Linux systems across production, staging, and internal networks.
- Operating infrastructure across multiple data centers, encompassing segmented networks, DMZs, and private backend tiers.
- Managing and securing services such as:
- Apache / PHP-FPM
- SFTP / FTPS (ProFTPD or equivalent)
- MySQL / Percona (including Galera clusters and proxies)
- HAProxy / reverse proxies / WAF-style architectures
- Designing and maintaining high-availability and fault-tolerant systems.
- Implementing and maintaining security controls:
- SELinux (enforcing, custom policies)
- iptables / nftables / ipset
- TLS hardening (FIPS-aware where applicable)
- MFA, access controls, and least-privilege enforcement.
- Supporting compliance efforts (SOC 2, HIPAA, FedRAMP-aligned controls), including evidence collection and control validation.
- Automating system configuration and maintenance using Ansible, shell scripting, and/or Python.
- Troubleshooting complex production issues across OS, network, and application layers.
- Participating in change management, incident response, and root cause analysis.
- Collaborating closely with engineering, support, and compliance teams to maintain system stability, security, and audit readiness.
- Logging into systems, reviewing logs, understanding packet flow, and diagnosing issues effectively.
Qualifications
- 7+ years of professional experience in Linux systems administration.
- Extensive experience with RHEL-based distributions (RHEL, Rocky, CentOS).
- In-depth knowledge of Linux Networking (routing, firewalls, NAT, VPN), system performance, and troubleshooting.