Java Backend Engineer

Citi•Mississauga, ON

2d•CA$94,300 - CA$141,500

About The Position

The Java Backend Engineer is an intermediate level position responsible for participation in the establishment and implementation of new or revised application systems and programs in coordination with the Technology team. The overall objective of this role is to contribute to applications systems analysis and programming activities. We are seeking a highly skilled Java Developer with strong expertise in building scalable, secure, and high‑performance backend systems. You will work closely with architects, leads, DevOps, QA, and business teams to deliver modern microservices‑based solutions using Java, Spring Boot, Kafka, containers, and multiple databases.

Requirements

5+ years relevant experience in Design, development, testing and deployment of high quality code
3+ years’ experience and expertise in Core Java (Java 8+), OOPs, collections, concurrency, and multithreading.
3+ years of hands‑on experience with Spring Boot, REST services, microservices architecture.
3+ years’ experience with Database skills: Oracle, MongoDB, MSSQL
Experience with Docker, Kubernetes, and containerized deployments.
Strong knowledge of JSON, XML, serialization, annotations, caching, and distributed computing concepts.
Experience with Git/Bitbucket/GitHub, Maven/Gradle, CI/CD pipelines.

Nice To Haves

Messaging systems: Kafka (producers, consumers, topics, streaming).

Responsibilities

Design, develop, and maintain Java/Spring Boot applications and RESTful microservices.
Build scalable backend components with strong focus on performance, reliability, and clean architecture.
Develop and optimize APIs, backend logic, and integrations with internal/external systems.
Work with Oracle, MongoDB, MSSQL databases.
Containerize and deploy applications using Docker and Kubernetes.
Write clean, testable, well‑documented code and perform code reviews to maintain coding standards.
Develop automated unit/integration tests using JUnit and REST testing frameworks.
Troubleshoot and resolve issues across development, testing, and production environments.
Collaborate with cross‑functional teams and participate in Agile ceremonies throughout the SDLC.
Continuously improve application performance, development processes, and automation maturity.