Sr. Lead Developer – Application Development (Back-End)

CBTS serves enterprise and midmarket clients in all industries across the United States and Canada. CBTS combines deep technical expertise with a full suite of flexible technology solutions–including Application Modernization, Managed Hybrid Cloud, Cybersecurity, Unified Communications, and Infrastructure solutions. From developing and deploying modern applications and the secure, scalable platforms on which they run, to managing, monitoring, and optimizing their operations, CBTS delivers comprehensive technology solutions for its clients’ transformative business initiatives. For more information, please visit www.cbts.com.

OnX is a leading technology solution provider that serves businesses, healthcare organizations, and government agencies across Canada. OnX combines deep technical expertise with a full suite of flexible technology solutions—including Generative AI, Application Modernization, Managed Hybrid Cloud, Cybersecurity, Unified Communications, and Infrastructure solutions. From developing and deploying modern applications and the secure, scalable platforms on which they run, to managing, monitoring, and optimizing their operations, OnX delivers comprehensive technology solutions for its clients’ transformative business initiatives. For more information, please visit **www.onx.com** .

• Role Purpose (1–3 lines): Leads the design, development, and optimization of scalable, secure, and high-performance back-end systems. Drives engineering best practices, Golang, API architecture, and microservices-based design to support enterprise-grade applications.
• Key Responsibilities:
• Develop server-side logic, Golang, APIs, and integration services for large-scale enterprise systems.
• Optimize application performance, scalability, and reliability through code quality and database tuning.
• Implement microservices architecture using modern frameworks (e.g., Node.js, Java Spring Boot).
• Integrate authentication, authorization, and data security mechanisms into application backbones.
• Collaborate with front-end, DevOps, and QA teams to deliver end-to-end, cloud-ready solutions.
• Guide code reviews, enforce development standards, and mentor junior engineers.
• Troubleshoot production issues, perform root-cause analysis, and drive resolution improvements.