Lead Java Developer

CitiMississauga, ON

About The Position

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.

Requirements

  • 6-8 years of experience in Java development.
  • Strong backend development experience with Java and Spring Boot (REST APIs, security concepts, performance, and scalability).
  • Solid understanding of API design and microservices (service boundaries, resilience, observability basics).
  • Hands-on experience with SQL Server and relational data modeling.
  • Experience with Elasticsearch and event streaming with Kafka.
  • Proficiency with GitHub / Bitbucket workflows and practical experience with CI/CD pipelines.
  • Strong communication skills, ownership mindset, and ability to work collaboratively in an agile team.

Nice To Haves

  • Experience with cloud platforms (AWS, Azure, or GCP).
  • Containerization and orchestration experience (Docker, Kubernetes/OpenShift).
  • Exposure to observability practices (logging, metrics, tracing) and production support.

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.

Benefits

  • Citi is an equal opportunity employer, and qualified candidates will receive consideration without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, disability, status as a protected veteran, or any other characteristic protected by law.
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