Systems Reliability & Integration Engineer Job White Plains area,City of White Plains New York USA,IT/Tech

Location: City of White Plains

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

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.

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.

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.

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.

Critical Service & Messaging Operations

Communication Flows:
Manage Postfix mail queues for transactional messaging and internal relays, conflicts and spooling issues across a distributed network.
System Hardening:
Apply security best practices to both Ubuntu and RHEL fleets, utilizing SELinux, App Armor, 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. 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 loyment 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,…