Senior Middleware Platform Engineer (Apache, Tomcat & Ansible) - 85145

S.i. Systems

Contract Toronto, Ontario Computer Occupations

Posted:

February 21, 2026

Location:

Toronto, Ontario, Canada

Job Description

Line of Business: VDI and Mobility
Duration: 8 months (Possibility of Extension)
Location: Downtown Toronto or Scarborough - Hybrid - 2-3 days onsite
Must Have Requirements:
3+ years Ansible (roles, collections, Molecule, CI/CD).
Strong Linux (RHEL), networking, TLS/PKI, and load balancing fundamentals.
JVM operation basics (heap/GC) and Java web app deployment experience.
Responsibilities:
• Design reverse proxy and app tier topologies:
Active/active Tomcat clusters with load balancing & health checks (at Apache layer or external LB).
Session management strategy: sticky sessions via cookie, or session replication/Redis-backed sessions when stickiness is not possible.
• Performance engineering:
Tomcat connector threads, acceptCount, connectionTimeout, JVM sizing (Xms/Xmx), GC tuning (G1/Parallel), and thread pools.
• High availability & scaling:
Multi-AZ/region design, zero...
                

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Job Overview

Job Type: Contract

Location: Toronto, Canada

Posted: February 21, 2026

Deadline: April 02, 2026