We are seeking an experienced Senior Applications Architect to lead the specification, design, and integration of robust application architectures within complex, distributed environments. In this role, you will define the overall structure, logical components, interface boundaries, and interactions among software layers, databases, and middleware systems. Leveraging industry-standard architecture frameworks such as TOGAF ADM or Zachman, along with modeling notations like ArchiMate and UML, you will develop target solution architectures, evaluate reusable components, establish enterprise integration patterns, and create comprehensive architectural blueprints that guide development and modernization efforts.

Location: Toronto, ON (Hybrid – 3 days/week onsite)

Duration: 6-month contract (Possibility of extension)

Architectural Leadership: Direct the application architecture for complex, large-scale distributed systems.

Shape diverse integration models spanning APIs, SOA, ESB, and asynchronous data flows.

Flexible Hybrid Model: Balance independent remote productivity with collaborative onsite days in Toronto.

Lead the design, specification, and implementation of end-to-end application architectures across large-scale, distributed enterprise environments.

Define structural components, software layering, interface specifications, and interactions between applications, databases, and middleware systems.

Model business, application, and data interactions using ArchiMate and UML standards within a cooperative team environment.

Design and implement enterprise integration strategies, encompassing REST APIs, web services, Service-Oriented Architecture (SOA), Enterprise Service Bus (ESB), real-time messaging, and batch processing.

Identify and evaluate reusable components,



service abstractions, and quality-of-service metrics to improve system scalability and maintainability.

Define technical constraints, coding standards, and architectural guardrails for engineering squads and implementation teams.

Collaborate with enterprise architects, solution designers, infrastructure specialists, and project managers to align technical designs with corporate standards and cloud strategies.

Conduct architecture reviews, gap analyses, and technical risk assessments across multi-tier application platforms.

Minimum of 6 years of hands-on experience in the development and implementation of enterprise application architectures (Strictly Required).

Systems Analysis & Design: Extensive experience conducting systems analysis and technical design within large, multi-tier systems environments (Strictly Required).

Architecture Frameworks: Strong working knowledge of enterprise architecture frameworks, preferably TOGAF ADM or Zachman, across business, information, application, technology, and security domains (Strictly Required).

Integration Patterns & Middleware: In-depth knowledge and practical design experience across multiple integration models, including APIs, REST/SOAP web services, SOA, ESB implementations, hub-and-spoke, real-time, and batch-oriented data exchange (Strictly Required).

Nice-to-Have Assets:





Prior application architecture experience within a public sector or equivalent large-scale enterprise environment.

Experience delivering enterprise architecture artifacts aligned with formal public sector architecture review and checkpoint processes.

Experience with object-oriented analysis, design techniques, and enterprise data management principles.

If you're interested in the "Senior Applications Architect" role based in Toronto, we encourage you to apply online at

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 randstad.com.

📌 Senior Application Architect - Remote / Telecommute (Toronto)
🏢 Randstad
📍 Toronto