Senior .NET Integration Developer

Toronto, ON
On-site
Posted Oct 21, 2026
1 position

US$100 / hour

Opens LinkedIn

Employment type: Contract
Experience level: Lead · 10+ years
Posting language: English
Working hours: 40 hours per week
Seniority: Mid-Senior level
Application method: Direct apply is available

Job summary

Design, develop, enhance, and support enterprise .NET applications and integration solutions using IBM ACE, IIB, IBM MQ, APIs, and database technologies. Troubleshoot and optimize production systems, automate deployment and operational processes, and collaborate with stakeholders while documenting solutions and transferring knowledge to support teams.

Job details

Our Client is seeking an experienced Senior Software Developer to support the sustainment, enhancement, and integration of mission-critical police applications within the Government of Ontario's Justice Technology Services (JTS). The successful candidate will bring strong expertise in IBM App Connect Enterprise (ACE), IBM Integration Bus (IIB), IBM MQ, .NET development, API integration, and PowerShell scripting to support enterprise applications and integration platforms. Key Responsibilities Lead application design, systems analysis, development, and enhancement of enterprise applications. Design, develop, and maintain web-based applications using .NET, C#, VB.NET, JavaScript, Oracle, and Microsoft SQL Server. Develop, maintain, and troubleshoot integration solutions using IBM ACE, IBM IIB, WebSphere Message Broker, and IBM MQ. Design and implement enterprise service bus (ESB) solutions and IBM ACE message flows. Develop and maintain REST and SOAP APIs using JSON, XML, XSLT, and WCF. Build and deploy enterprise integration applications, ensuring performance, reliability, and security. Develop automation scripts using PowerShell to support application deployment and operational processes. Work with Oracle, SQL Server, PL/SQL, and ESQL for database operations and integration. Configure and troubleshoot reverse proxies, forward proxies, and Apache web server settings. Support application testing, debugging, performance optimization, and production issue resolution. Use Azure DevOps for source control, development workflows, and deployment activities. Collaborate with technical teams and stakeholders to resolve complex application and integration challenges. Prepare technical documentation and provide knowledge transfer to police application support teams. Mandatory Qualifications Proven hands-on experience with IBM ACE, IBM Integration Bus (IIB), WebSphere Message Broker, and IBM MQ. Strong knowledge of web-based .NET application development technologies and frameworks. Experience designing, developing, and integrating applications using REST and SOAP APIs. Strong expertise in PowerShell scripting and automation. Preferred Qualifications Experience with C#, VB.NET, JavaScript, WCF, and enterprise application development. Strong experience with Oracle, Microsoft SQL Server, PL/SQL, and ESQL. Knowledge of enterprise service bus (ESB) architecture and middleware integration. Experience with JSON, XML, XSLT, and API development. Familiarity with reverse and forward proxy configurations and Apache server management. Experience with ArcGIS, ArcGIS APIs, and spatial data management. Working knowledge of Java programming. Experience using Azure DevOps and enterprise development tools. Strong analytical, troubleshooting, and problem-solving abilities. Excellent communication, documentation, and stakeholder collaboration skills.

What you’ll do

Requirements

Hands-on experience with IBM ACE, IIB, WebSphere Message Broker, and IBM MQ is mandatory, along with strong .NET development, API integration, and PowerShell automation expertise. Preferred qualifications include experience with C#, VB.NET, JavaScript, WCF, Oracle, SQL Server, ESB architecture, XML technologies, proxies, Apache, ArcGIS, Java, and Azure DevOps.