Senior Full Stack Engineer-6

Realign Llc; Toronto; On-site; CAD 90,000 - 120,000; Full time

Benefits offered by this job

Job summary

Realign Llc is seeking an experienced Java developer to design, implement, and maintain scalable applications and microservices. You will write unit tests with JUnit/Mockito, practice TDD, and ensure security-by-design in every release.

The role emphasizes high code quality, robust APIs, and collaboration with architects and operations to deliver reliable software. The ideal candidate will have 5+ years in Java, strong Spring Boot experience, and a passion for clean code, performance, and

Qualifications

• 5+ years of software development experience in Java / NodeJs.
• Strong command of core Java concepts and JVM memory management.
• Proven unit testing with JUnit and Mockito.
• Familiar with TDD, test automation, and continuous testing.
• Experience building RESTful APIs and microservices with Spring Boot.
• Knowledge of secure coding practices and OWASP top principles.
• Experience integrating tests and security gates into CI/CD.

Responsibilities

• Design, develop, and maintain Java applications and microservices.
• Write comprehensive unit tests to ensure reliability and coverage.
• Apply TDD and continuous testing to drive design decisions.
• Build modular, testable RESTful APIs and services.
• Embed security-by-design throughout the development life cycle.
• Lead code reviews, pair programming, and best practices.
• Refactor existing code to reduce debt and improve readability.

Skills

Java core concepts

Concurrency/multithreading

JUnit & Mockito

Test-driven development

REST microservices

Spring / Spring Boot

CI/CD integration

Code quality & patterns

Security-by-design

Team collaboration

Education

CS degree or related

Tools

Maven/Gradle

Git/Bitbucket

Jenkins

SonarQube

JaCoCo

Docker

Kubernetes

Backstage

Job description

Location: Toronto, ON
Job Type: Full Time
Work Model: Onsite

Roles and Responsibilities

• Design, develop, and maintain high-quality, maintainable Java applications and services using clean code principles and established design patterns.
• Write comprehensive, meaningful unit tests using JUnit and Mockito to ensure code correctness, reliability, and long-term maintainability.
• Apply test-driven development (TDD) and continuous testing practices to drive design, maximize coverage, and prevent regressions.
• Build modular, reusable, and testable applications and APIs (REST web services) in Java.
• Embed security-by-design throughout the development life cycle, following secure coding standards and addressing vulnerabilities early.
• Champion code quality through thorough code reviews, pair programming, and adherence to coding standards and best practices.
• Refactor and improve existing codebases to reduce technical debt and enhance readability, performance, and testability.
• Apply core Java concepts - collections, concurrency and multithreading, generics, streams, exception handling, and JVM memory management to build robust solutions.
• Integrate automated unit testing, static code analysis, security scanning, and quality gates into CI/CD pipelines.
• Use tools such as SonarQube and JaCoCo to measure, enforce, and continuously improve code quality and test coverage.
• Collaborate with architects, business and application analysts, operations teams, and testing specialists to deliver reliable, secure, high-quality solutions.
• Diagnose, troubleshoot, and resolve complex technical, performance, security, and reliability issues.
• Stay current with emerging technologies, including AI-assisted development and developer experience platforms, and evaluate how they can improve quality and productivity.

Skills Required

• 5+ years of software development experience in Java / NodeJs, spanning the full application development life cycle.
• Strong command of core Java concepts, including collections, concurrency/multithreading, generics, streams, lambdas, exception handling, and JVM memory management.
• Proven, hands-on experience writing effective unit tests with JUnit and mocking frameworks such as Mockito.
• Solid understanding of test-driven development (TDD), test automation, and continuous testing practices.
• Deep commitment to code quality, clean code, SOLID principles, and design patterns.
• Working knowledge of secure coding practices and application security fundamentals (for example, the OWASP Top 10).
• Experience building RESTful APIs and microservices using frameworks such as Spring / Spring Boot.
• Experience with static code analysis, code coverage, and security scanning tools such as SonarQube and JaCoCo.
• Experience with build tools such as Maven or Gradle and source code management tools such as Git and Bitbucket.
• Experience integrating automated tests, quality checks, and security gates into CI/CD pipelines (for example, Jenkins).
• Strong analytical, problem-solving, communication, and technical documentation skills.
• Ability to work effectively in a fast-paced, cross-functional Agile environment.

Nice to Have (Added Advantage)

• Experience using AI-assisted development tools (for example, GitHub Copilot) to accelerate coding and testing.
• Experience working with AI agents or agentic development workflows.
• Experience with backend API technologies such as Node.js is preferred.
• Experience with Backstage and related developer portal technologies.
• Experience building and maintaining CI/CD pipelines and related tooling.
• Experience with containerization and orchestration technologies such as Docker and Kubernetes.
• Experience with cloud platforms such as AWS.
• Experience with Jira, Confluence, and Agile delivery practices.
• University Degree or College Diploma in Computer Science or a related technology field.