Lead Java Developer

Citi • Mississauga, ON

7d • Onsite

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 an 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.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior