Lead Java Developer
Citigroup • Mississauga, ON • Posted May 28, 2026
Position Overview
**Role Summary:**
+ We are looking for a Java Engineer to design, build, and support modern web APIs. This role focuses on back-end services (Java/Spring Boot), with API-first, microservices-based architecture and CI/CD-driven delivery.
+ **Key Responsibilities**
+ Develop and maintain web APIs, and backend services.
+ Build scalable, secure microservices using Java and Spring Boot.
+ Design, build, document, and consume RESTful APIs; ensure service contracts and versioning strategies are followed.
+ Work with SQL Server and optimize queries, indexes, and data access patterns.
+ Implement search and indexing solutions with Elasticsearch.
+ Build event-driven integrations using Kafka (producers/consumers, topics, schema/versioning awareness).
+ Use GitHub / Bitbucket and contribute to automated CI/CD pipelines (build, test, deploy).
+ Write unit and integration tests; participate in code reviews and engineering best-practice adoption.
**Requ...
+ We are looking for a Java Engineer to design, build, and support modern web APIs. This role focuses on back-end services (Java/Spring Boot), with API-first, microservices-based architecture and CI/CD-driven delivery.
+ **Key Responsibilities**
+ Develop and maintain web APIs, and backend services.
+ Build scalable, secure microservices using Java and Spring Boot.
+ Design, build, document, and consume RESTful APIs; ensure service contracts and versioning strategies are followed.
+ Work with SQL Server and optimize queries, indexes, and data access patterns.
+ Implement search and indexing solutions with Elasticsearch.
+ Build event-driven integrations using Kafka (producers/consumers, topics, schema/versioning awareness).
+ Use GitHub / Bitbucket and contribute to automated CI/CD pipelines (build, test, deploy).
+ Write unit and integration tests; participate in code reviews and engineering best-practice adoption.
**Requ...