Lead Java development for enterprise web applications and platform services in Toronto, working fully onsite five days weekly throughout an 11-month contract.
This Senior Software Developer role spans technical design, development, integration, and maintenance. You will build microservices, REST APIs, reusable platform components, and database solutions. The work covers user-interface, API, workflow, integration, and data-access layers within an Agile setting.
Key Responsibilities: Translate technical specifications into tested, secure enterprise applications
Build Java microservices, REST APIs, and reusable platform capabilities
Develop database objects, queries, transformations, and integration workflows
Implement JWT, OAuth 2.0, SSL, and identity integrations




Maintain automated unit, integration, API, database, and interface tests
Requirements: 10+ years designing large-scale, multi-client web applications
Extensive Java experience with Oracle, SQL, or comparable databases
Significant REST API and microservices architecture experience
Experience with JWT, OAuth 2.0, SSL, and secure communications
Experience integrating identity and access systems
Bring senior Java, microservices, database, and security expertise to enterprise platform development with Randstad Canada in Toronto.

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📌 Senior Java Full Stack Developer (Ontario)
🏢 Randstad Deutschland
📍 Ontario