Specialized It Consultant - Senior

We are seeking an experienced Specialized IT Consultant - Senior to lead the technical design, development, and integration of secure, scalable, microservices-based application components. In this role, you will be responsible for building high-performance RESTful APIs, implementing event-driven message architectures, and orchestrating containerized deployments within cloud environments. Working closely with cross-functional technical teams and system architects, you will ensure seamless integration between modern cloud services and legacy core environments, while enforcing robust identity controls and web security standards.
Location: Toronto, ON (Fully Onsite - 5 days/week required)
Duration: 6-month contract
Advantages
Modern Java Ecosystem: Direct hands-on development using modern Java, Spring Boot, and cloud-native microservice architectures.
Complex Enterprise Integration: Bridge modern cloud-native systems with enterprise legacy and mainframe backends using advanced Spring Integration patterns.
Event-Driven Cloud Infrastructure: Gain high-value experience building event-driven systems with Azure Service Bus and Azure Event Hub.
Dedicated Onsite Collaboration: Work alongside senior engineering peers and solution architects in a structured, 5-day onsite workspace.
Responsibilities
API Design & Microservices Engineering: Architect, build, and maintain clean, scalable, and secure RESTful APIs and decoupled microservices using Java and Spring Boot.
Enterprise Integration & Legacy Middleware: Implement complex integration patterns using Spring Integration to route, transform, and connect cloud microservices with core legacy and mainframe systems.
Event-Driven Architecture & Messaging: Design and manage event-driven messaging solutions utilizing Azure Service Bus, Azure Event Hub, AMQP, and JMS protocols.
Security & Authentication Governance: Implement enterprise security frameworks and protocols, including OAuth2, OpenID Connect, SAML 2.0, JWT, and OWASP security guidelines.
Containerization & Orchestration: Package, deploy, and manage containerized microservices across cloud platforms such as Azure, OpenShift, Docker, and Kubernetes.
Database Optimization & Automated Testing: Design relational database schemas (SQL Server, Oracle) and write comprehensive automated unit and integration test suites using JUnit, Mockito, or Test Containers.
Performance Tuning & Operational Visibility: Profile, monitor, and optimize API throughput and response times while integrating logging frameworks (Prometheus, Grafana, ELK Stack).
Technical Documentation & Mentorship: Author API specs, deployment guides, and system runbooks while conducting peer code reviews and mentoring junior engineering personnel.
Qualifications
REST API & Spring Boot Mastery: Extensive, hands-on experience in REST API design, documentation, testing, and microservices development using Java and Spring Boot (Strictly Required).
Integration Patterns & Mainframe Connectivity: In-depth knowledge of integration patterns using Spring Integration, including experience integrating with legacy mainframe or IMS systems (Strictly Required).
Messaging & Event-Driven Architecture: Proven experience with message-oriented middleware, event-driven architectures, and messaging platforms such as Azure Service Bus (Strictly Required).
Containerized Environments: Hands-on experience building and deploying applications within containerized ecosystems (Azure, OpenShift, Docker, Kubernetes) (Strictly Required).
Web Security Frameworks: Deep practical experience implementing web security standards, including OAuth, OpenID, SAML 2.0, and encryption practices (Strictly Required).
Nice-to-Have Assets
Familiarity with container orchestration management using Helm charts.
Experience with XML transformations (XSLT, XPath) in enterprise integration contexts.
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 View email address on ca.hrm.tc to ensure their ability to fully participate in the interview process.
This posting is for existing and upcoming vacancies.
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