Java Backend Engineer: Scalable Microservices & Spring Boot

Citi; Mississauga; On-site; CAD 131,000 - 196,000; Full time

Job summary

Citi is hiring a Java Backend Engineer in Mississauga. You will build scalable, secure, and high‑performing backend systems and collaborate with architects, DevOps, QA, and business teams to deliver modern microservices solutions using Java and Spring Boot.

You will work with Kafka, containers, and multiple databases, writing clean, testable code, conducting reviews, and continuously improving performance and automation within an Agile SDLC.

Qualifications

• 5+ years in design, development, testing and deployment of high quality code.
• 3+ years with Core Java (Java 8+), OOPs, concurrency, and multithreading.
• 3+ years with Spring Boot, REST services, microservices architecture.
• 3+ years with Oracle, MongoDB, MSSQL databases.

Responsibilities

• Design, develop, and maintain Java/Spring Boot applications and RESTful microservices.
• Build scalable backend components with focus on performance and reliability.
• Develop APIs, backend logic, and integrations with internal/external systems.
• Containerize and deploy using Docker and Kubernetes.
• Write unit and integration tests with JUnit and REST testing frameworks.

Skills

Java backend development

Cloud & microservices

RESTful APIs

Education

Bachelor's degree in Computer Science/Engineering

Tools

Java

Spring Boot

Kafka

Docker

Kubernetes

Oracle

MongoDB

MSSQL

Git/GitHub/Bitbucket

Maven/Gradle

CI/CD

JUnit

JSON/XML

Job description

Citi is hiring a Java Backend Engineer in Mississauga. You will build scalable, secure, and high‑performing backend systems and collaborate with architects, DevOps, QA, and business teams to deliver modern microservices solutions using Java and Spring Boot.

You will work with Kafka, containers, and multiple databases, writing clean, testable code, conducting reviews, and continuously improving performance and automation within an Agile SDLC.