Linux system administrator Jobs in Toronto, ON

We are seeking a versatile Middleware Administrator for a 12-month contract in Toronto. This is a "hands-on" technical role focused on the installation, configuration, and proactive management of enterprise middleware technologies. As a middleware generalist, you will support both critical project work and ongoing business operations, ensuring that the integration layer remains secure, high-performing, and compliant with architectural standards.

Duration: 12-month contract

Location: Toronto, ON (Hybrid)

Start Date: ASAP

Rate: $57.09-$63.81/hr

Advantages
Technology Breadth: Work across a wide array of industry-leading middleware platforms, from IBM and Oracle to open-source web technologies.

Hybrid Flexibility: Enjoy a balanced work model with a mix of onsite collaboration in Toronto and remote work.

Immediate Impact: Start ASAP on a long-term engagement that combines high-visibility project work with stable operational support.

Professional Growth: Opportunity to champion new ideas and evaluate emerging middleware approaches in a complex, enterprise environment.

Responsibilities
Systems Administration: Lead the installation, configuration, and tuning of middleware technologies. Deploy and configure complex interfaces to ensure seamless data flow across systems.

Operational Support: Diagnose and resolve production issues through expert-level troubleshooting and root-cause analysis.

Asset Refresh & Upgrades: Manage small-to-medium middleware upgrade projects, ensuring smooth transitions during asset refresh initiatives.

Security & Compliance: Routinely apply the latest security patches, perform comprehensive health checks, and manage SSL certificates to maintain a hardened environment.

Performance Tuning: Proactively monitor system performance and implement tuning measures to optimize throughput and reliability.

Documentation: Create and maintain high-quality technical documentation, including operational support guides and "Buildbooks."

Qualifications
Technical Requirements (Mandatory)
IBM Integration Suite: Minimum 5 years of experience administering IBM App Connect Enterprise (ACE) and IBM MQ.

Application Servers: Proficiency in WebLogic 12c (and above).

Web Technologies: Hands-on experience with Apache, Tomcat, and Reverse Proxy configurations.

Certificate Management: Working knowledge of SSL/TLS certificate management and security protocols.

Highly Desirable Skills:
Oracle Utilities: Experience with Oracle Utilities Applications (CCB, NMS, OUA, and OMA).

WebSphere: Administration of WebSphere Application Server.

Job Scheduling: Experience with enterprise job schedulers such as Appworx.

ETL & Reporting: Familiarity with SAP BO reporting, Data Services, or other ETL technologies.

Professional Skills
Analytical Thinking: Ability to systematically gather information and grasp complexities within integrated environments.

Collaborative Mindset: Willingness to share information, gain consensus, and work toward the best solution for the team rather than individual goals.

Project Management: Experience managing client expectations, performing impact analysis, and adjusting plans based on changing business priorities.

Education: Bachelor’s Degree in Computer Science or an applicable professional designation.

Summary
If you are a Middleware Generalist who thrives on solving complex technical puzzles and maintaining the backbone of enterprise IT communications, we encourage you to apply today!

Randstad Canada is committed to fostering a workforce reflective of all peoples of Canada. As a result, we are committed to developing and implementing strategies to increase the equity, diversity and inclusion within the workplace by examining our internal policies, practices, and systems throughout the entire lifecycle of our workforce, including its recruitment, retention and advancement for all employees. In addition to our deep commitment to respecting human rights, we are dedicated to positive actions to affect change to ensure everyone has full participation in the workforce free from any barriers, systemic or otherwise, especially equity-seeking groups who are usually underrepresented in Canada's workforce, including those who identify as women or non-binary/gender non-conforming; Indigenous or Aboriginal Peoples; persons with disabilities (visible or invisible) and; members of visible minorities, racialized groups and the LGBTQ2+ community.

Randstad Canada is committed to creating and maintaining an inclusive and accessible workplace for all its candidates and employees by supporting their accessibility and accommodation needs throughout the employment lifecycle. We ask that all job applications please identify any accommodation requirements by sending an email to accessibility@randstad.ca to ensure their ability to fully participate in the interview process.