Build scalable backend services with Java, asynchronous microservices, and reactive programming on Citi’s full time applications development team.
This Backend Java Developer position focuses on resilient, high-performance services and modern event-based architectures. You will use Java Lambdas, MongoDB, Elasticsearch, and Apache Kafka while applying Test-Driven Development. The work also includes collaboration, technical guidance, and production support.
Key Responsibilities: Design and deploy asynchronous, event-driven Java microservices
Implement reactive functional programming with Java Lambdas
Develop MongoDB persistence and Elasticsearch search capabilities
Integrate Apache Kafka event streaming solutions
Resolve production issues and participate in code reviews
Requirements: Strong proficiency in Java 8 or newer
Experience designing asynchronous, event-based microservices architectures
Hands-on Spring WebFlux, Reactor, or RxJava experience
Strong MongoDB, Elasticsearch, and Apache Kafka experience
Six to ten years of relevant experience
Apply backend Java expertise, reactive programming, Kafka, and rigorous testing to Citi applications development.

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📌 Backend Java Developer Microservices (Ontario)
🏢 Citi
📍 Ontario