Software Developer Sr

Job description
Are you a skilled Senior Software Developer with strong experience in IBM ACE, .NET frameworks, and enterprise integrations? Our client is looking for a hybrid contract role based in Toronto 📍 to support and sustain key public safety systems. This is a 8 month contract with the possibility of one extension.
The ideal candidate will bring deep knowledge of IBM Integration Bus, PowerShell scripting, and modern API protocols (REST/SOAP), with a strong ability to troubleshoot, automate, and collaborate in a dynamic development environment. If you have a knack for solving integration challenges and working across diverse technology stacks, this is your opportunity to make a meaningful impact.

Advantages
🏠 Hybrid work setup – mix of remote and on-site in downtown Toronto
🧠 High-impact role supporting mission-critical systems
🔗 Hands-on with cutting-edge integration tools (IBM ACE/IIB)
🧩 Blend .NET, Oracle, and Azure DevOps technologies
🧰 Work with a modern tech stack across automation, APIs, and databases
📚 Opportunity for long-term extension

Responsibilities
• Design and analyze web-based application architecture using .NET and integration platforms
• Develop and support solutions using IBM ACE, IBM Integration Bus (IIB), and IBM MQ
• Write and optimize message flows, ESQL scripts, and interface logic
• Develop and maintain REST/SOAP APIs for system integration
• Script automation processes using PowerShell
• Support reverse/forward proxy configurations and manage Apache server settings
• Utilize Oracle, SQL Server, and PL/SQL for data integration
• Maintain technical documentation and participate in knowledge transfer
• Collaborate with stakeholders and cross-functional teams for seamless delivery
• Provide innovation-driven problem-solving to streamline integration pipelines

Qualifications
Must Have:
• 💻 Proficiency in IBM ACE, IIB, WebSphere Message Broker, and IBM MQ
• 🌐 Experience in .NET development frameworks (C#, VB.NET, ASP.NET)
• 🔁 Proven integration skills with REST, SOAP, JSON, and XML
• ⚙️ Strong automation and scripting skills using PowerShell
• 🛠️ Solid database expertise: Oracle, SQL Server, PL/SQL
• 🔒 Experience configuring proxy servers and managing server security
• 🗣️ Excellent communication and team collaboration abilities

Nice to Have:
📍 Familiarity with ArcGIS and ArcGIS APIs
📘 Working knowledge of Java programming
🔧 Experience with Azure DevOps and version control
🧪 Experience designing secure, scalable integration workflows

Summary
This hybrid position offers a fantastic opportunity for a seasoned software developer to support and sustain complex, integration-heavy environments. From IBM ACE to .NET and PowerShell, your expertise will play a vital role in modernizing systems critical to operational efficiency and public service delivery.
If you are passionate about systems integration and ready to drive meaningful outcomes, If you are interested in this role, please apply online at www.randstad.ca. Qualified candidates will be contacted.

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.

Canada
Ontario
Toronto Show on map Get directions