Our financial services client is seeking a Senior Applications Developer (6-8 years of experience) to develop and maintain backend payment applications using Go (Golang) Join a Capital Markets technology team supporting a legacy Payment Hub Foreign Exchange platform critical to backend payment processing.

This role focuses on hands-on Golang development, application maintenance, testing support, and production deployment across the full software delivery lifecycle.

The position offers end-to-end ownership of backend development initiatives while contributing technical direction and mentorship within a smaller development team.

Candidates will work closely with established payment systems and supporting business domains in a high-visibility workplace.

Hybrid, 2days onsite - Wednesday Thursday Bay Street, Toronto Contract for 6 months with a possibility of extension Must Haves 6-8 years of software development experience 2-3 years of hands-on Go (Golang) backend application development Test-Driven Development and comprehensive unit test suite development Snyk , Sonar

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and static code analysis or vulnerability scanning tools Technical leadership, mentorship, or development guidance experience within software development teams Nice to Have Awareness of AI-assisted or AI-driven software development tools and practices Exposure to payment applications, foreign exchange platforms, or Capital Markets technology environments Responsibilities Design, develop, enhance, and maintain backend applications using Go (Golang) Take ownership of development deliverables from requirements analysis through testing and production deployment Understand existing application architecture, business domain, dependencies, and supporting systems Support development, integration testing, user acceptance testing, implementation, and production release activities Lead smaller projects or application initiatives independently Provide technical direction, mentorship, and development guidance to team members Use static code analysis and security scanning tools to address code quality and vulnerability concerns

📌 Senior Applications Developer (6-8 years of experience) to develop and maintain backend payment applications using Go (Golang) 107494-1
🏢 S.i. Systems
📍 Toronto