Senior Java Developer to design, develop, and maintain open-source integrations using Spring and Spring Integration

S.i. Systems • Ottawa, Ontario, Canada • Posted March 23, 2026

Location Ottawa, Ontario

Job Type Contract

Category Computer Occupations

Posted March 23, 2026

Initial 12-month contract (% Remote EST) with strong possibility of extension. 7.5 hours per day, Monday to Friday.
Responsibilities:
Design, develop, and maintain open-source integrations using Spring and Spring Integration, replacing existing MuleSoft-based integrations
Build and establish reusable integration frameworks and backend flows to support a large pipeline of upcoming integrations
Collaborate with a small development team to deliver secure, scalable integration solutions within a COTS application ecosystem (no development within the COTS platform itself)
Provide technical leadership and mentorship to two developers, acting as the senior Java resource on the team (~80% hands-on development / ~20% coaching)
Troubleshoot and optimize integration services, ensuring reliability and performance across operational platforms
Work closely with stakeholders to understand integration requirements and rapidly deliver...
            

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