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Senior Java developer

  • Toronto, ON, Canada
  • Greater Toronto Area, Canada, Canada

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Job details

Job type
Contract
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Posting language
English
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Original job description

We are looking for a Java Spring Boot Developer with strong Relational Database (SQL) experience to join our backend engineering team. In this role, you will be responsible for building, optimizing, and maintaining scalable RESTful APIs, core microservices, and database interactions for enterprise applications.

Key Responsibilities

  • Microservices Development: Design, build, and maintain high-performance backend microservices using Java and Spring Boot.
  • Database & SQL Engineering: Write, optimize, and debug complex SQL queries, stored procedures, and database schemas for relational databases.
  • Core Backend Development: Write efficient, maintainable backend code using Java and Spring Boot, while supporting legacy Java / J2EE architectures where required.
  • API Integration: Develop robust REST APIs and integrate third-party applications, ORM frameworks (Hibernate/Spring Data JPA), and data pipelines.
  • Code Quality & Testing: Write clean, unit-tested code (JUnit/Mockito) and participate in peer code reviews to maintain high technical standards.
  • Performance Tuning: Troubleshoot database bottlenecks, index management, and API latency to ensure high availability and responsiveness.

Key Qualifications

Technical Requirements:

  • Java & Spring Boot: Proven hands-on experience building enterprise backend applications using Java and Spring Boot.
  • Database & SQL Skills: Solid proficiency in relational databases (PostgreSQL, MySQL, Oracle, DB2, or MS SQL Server) with advanced SQL query writing and performance tuning experience.
  • ORM & Data Access: Hands-on experience with Spring Data JPA or Hibernate.
  • API Design: Strong knowledge of RESTful API design principles and JSON/XML handling.
  • Version Control & CI/CD: Familiarity with Git and standard CI/CD deployment pipelines.
More about this job

Responsibilities

Design, build, optimize, and maintain Java and Spring Boot microservices, REST APIs, and relational database interactions for enterprise applications. Improve performance and reliability through SQL and database tuning, testing, code reviews, and integration with third-party applications and data pipelines.

Requirements

Requires hands-on experience developing enterprise backend applications with Java and Spring Boot, along with advanced SQL skills and experience with relational databases. Also requires familiarity with Hibernate or Spring Data JPA, REST API design, JSON/XML, Git, and CI/CD pipelines.

Skills

  • Java
  • Spring Boot
  • Relational Databases
  • SQL
  • Microservices
  • RESTful APIs
  • Hibernate
  • Spring Data JPA
  • JUnit
  • Mockito
  • Git
  • CI/CD
  • Database Performance Tuning
  • JSON
  • XML

Visa sponsorship

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Categories

  • Software
  • Technology
  • Engineering

Keywords

  • Java
  • Spring Boot
  • SQL
  • Relational Databases
  • PostgreSQL
  • MySQL
  • Oracle
  • DB2
  • Microsoft SQL Server
  • Microservices
  • REST APIs
  • Hibernate
  • Spring Data JPA
  • JUnit
  • Mockito
  • Git
  • CI/CD
  • JSON
  • XML
  • J2EE
  • Stored Procedures
  • Database Schemas
  • Performance Tuning
  • Index Management
  • API Integration
  • Data Pipelines
  • Enterprise Applications
  • Banking

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