Systems Reliability & Integration Engineer

We are seeking a high-caliber Systems Reliability & Integration Engineer to manage a

complex, high-concurrency Linux infrastructure. This role is designed for a dedicated

troubleshooter who enjoys the "detective work" of system administration. You will ensure the

stability of a fleet of Ubuntu and RHEL servers supporting thousands of concurrent remote

sessions, while managing the critical data feeds and application environments that keep our

business moving.

Core Responsibilities

1. High-Density Systems & Infrastructure

● Fleet Management: Maintain and optimize a mixed environment of Ubuntu and RHEL

servers, ensuring high availability for thousands of concurrent user connections.

● Connectivity Orchestration: Manage the secure handoff between RDP gateways and

backend SSH environments.

● Traffic Management: Configure and tune Nginx as a high-performance reverse proxy

and load balancer to handle peak traffic loads.

● Kernel & Network Tuning: Proactively monitor and tune the Linux networking stack

(TCP/IP limits, file descriptors, and socket buffers) to prevent bottlenecks in a

high-density session environment.

2. Collaborative Lifecycle Management

● Stakeholder Alignment: Actively participate in technical syncs with Project Managers

and Developers to represent infrastructure interests during the product roadmap phase.

● Release Governance: Consult on the deployment of updates and hotfixes, ensuring

that Best Practices are followed to minimize user impact.

● Feedback Loop: Provide developers with production-level telemetry to help them

optimize code before it reaches the fleet.

3. Production Application Support

● Post-Deployment Engineering: Troubleshoot .NET Core applications and bottlenecks.

● Runtime Diagnostics: Troubleshoot application crashes, memory pressure, and

threading issues within the Linux environment to ensure software performs reliably at

scale.

4. Data Integration & ETL Management

● Inbound Processing: Manage and troubleshoot data ingestion from multiple external

systems.

● Outbound Replication: Monitor and maintain data feed replication from Linux-based

systems to Microsoft SQL Server environments.

● Feed Reliability: Monitor and maintain the integrity of automated ETL scripts, ensuring

data lands accurately and on time across heterogeneous systems.

5. Critical Service & Messaging Operations

● Communication Flows: Manage Postfix mail queues for transactional messaging and

internal relays.

● Print Management: Support enterprise-scale printing via CUPS, troubleshooting driver

conflicts and spooling issues across a distributed network.

6. Security, Hardening & Modernization

● System Hardening: Apply security best practices to both Ubuntu and RHEL fleets,

utilizing SELinux, AppArmor, and firewall configurations to ensure a "Defense in Depth"

posture.

● Access Control: Harden SSH configurations and entry points to protect against lateral

movement.

● Automation Roadmap: Contribute to the transition from manual administration to

Ansible. You will help build the playbooks that standardize our configurations, patching,

and security audits.

Mavis is an Equal Opportunity Employer

Consistent with our commitment to the principle of equal employment opportunity for all individuals, we enforce a zero-tolerance policy on discrimination at Mavis. Employment decisions are made without regard to an applicant's or employee's actual or perceived race, color, religion, creed, sex, pregnancy, sexual orientation, national origin, age, ancestry, ethnicity, disability, citizenship, alienage, marital status, domestic or civil union partnership status, familial status, caregiver status, military or veteran status, transgender status, gender identity or expression, genetic information, predisposing genetic characteristic, status as a victim of domestic violence, stalking and sex offenses, or any other status protected by applicable federal, state or local laws, regulations or ordinances. Exceptions or modifications to certain job duties and/or expected schedules may be provided for an employee who needs a reasonable accommodation for: (a) a sincerely held religious belief, observance or practice that conflicts with the expected schedule for a position; or (b) an otherwise qualified individual with a disability, unless such accommodation poses an undue hardship on our business, in accordance with applicable federal, state and local laws. Additional information is available by contacting HRConnect@mavistire.com.

We will endeavor to make a reasonable accommodation / modification to the known physical or mental limitations of a qualified applicant with a disability to assist in the hiring process, unless the accommodation would impose an undue hardship on the operations of our business, in accordance with applicable federal, state and local laws. If you believe you require such assistance to complete this Application for Employment or to participate in the interview process, please contact our Employee Experience team at (914) 984-2500 ext. 5631. We also will endeavor to provide reasonable accommodation for a job applicant's or an employee's sincerely held religious beliefs, observances, or practices that conflict with a work requirement unless the accommodation poses an undue hardship to our business, in accordance with applicable federal, state and local laws. If you believe you require such an accommodation, please contact our Employee Experience team at (914) 984-2500 ext. 5631. In addition, applicants may report any instances of perceived discrimination through HRConnect either by calling toll-free at 1-877-628-4755 or by sending an email to HRConnect@mavistire.com.