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Added 38 mins ago
Full Stack Engineer - Java, NodeJS & UI
Astra-North Infoteck Inc. ~ Conquering today’s challenges, achieving tomorrow’s vision!
Toronto, ON
Full-time
We are looking for a seasoned Senior Full Stack Engineer who is passionate about building high-quality, secure, and maintainable software. As part of the Technology and Transformation…
Added 1 hour ago
Senior Web Developer (Full-Stack)
Myant Shared Service Corp.
Mississauga, ON
Full-time
We're looking for a Senior Full-Stack Web Developer to own Myant's public-facing web presence (company and product websites, landing pages, SEO, analytics) and to contribute to our core…
Added 1 hour ago
Digital Solution Architect Lead Advisor
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Build full-stack applications (Python APIs, AI services, UI dashboards)
Added 2 hours ago
Senior Full-Stack Software Engineer - AI-Native Engineering, Java & React
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Full-time
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Added 2 hours ago
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$145,000 CAD / year
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Bachelor's degree in Computer Science or a related field (5+ years of industry experience, with 2+ of those being as a senior developer).
Added 3 hours ago
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Added 3 hours ago
Senior Enterprise Architect - Smart Cities & Emerging Technologies
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…Asie, qui collaborent avec nous dans le cadre de nos capacités full-stack et notre rythme. Nous sommes des penseurs stratégiques, des collaborateurs pratiques qui aident les clients à…
Added 3 hours ago
Senior Business Intelligence Analyst
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…Asie, qui collaborent avec nous dans le cadre de nos capacités full-stack et notre rythme. Nous sommes des penseurs stratégiques, des collaborateurs pratiques qui aident les clients à…
Added 3 hours ago
Senior Software Engineer II, Full Stack - Growth (Hybrid)
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Added 3 hours ago
Senior Data Engineer
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As a Senior Data Engineer, you'll own the data platform that powers decision-making across Clutch, from how we buy and price vehicles, to how customers move through our funnel, to how we…
Added 3 hours ago
Senior Full-Stack Software Engineer - AI-Native Engineering, Java & React
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Added 3 hours ago
Junior Fullstack Developer (Python)
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Interest in developing yourself as a full stack developer, implementing both Front-End and Back-End code.
Added 3 hours ago
Senior Full Stack Engineer : Toronto, ON : Hybrid : FTE
AceStack
Toronto, ON
Full-time
We are seeking a Senior Full Stack Engineer with strong hands-on experience in Java, Spring Boot, REST APIs, microservices, unit testing, and software engineering best practices. The ideal…
Added 3 hours ago
Full Stack Software Engineer, Growth (Hybrid)
Homebase
Remote, Canada
$175,000 to $205,000 USD / year
Full-time · Remote
We’re looking for a Full Stack Senior Software Engineer 2 who’s passionate about building AI-powered, high-velocity systems that transform how our Growth, Sales, and Product teams operate.…
Added 3 hours ago
Senior Software Engineer II, Multiple Teams
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Full-time · Remote
…We're on a journey to reinvent banking, and we're looking for Senior Software Engineer IIs to help set the technical direction for how we get there. You'll take on our highest-risk, most…
Added 4 hours ago
Senior Data Scientist, Financial Services
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As a Senior Data Engineer, you'll own the data platform that powers decision-making across Clutch, from how we buy and price vehicles, to how customers move through our funnel, to how we…
Added 4 hours ago
Full Stack Java Developer Tech Lead- Vice President
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The Full Stack Java Developer Tech Lead- Vice President is a senior level position responsible for establishing and implementing new or revised application systems and programs in…
Added 4 hours ago
Senior Oracle APEX Full-Stack Developer
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Added 5 hours ago
Senior Software Engineer
Okta
Toronto, ON
$136,000 to $187,000 CAD / year
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As a Senior Engineer on the OIG team, you will be involved into development, design, and maintenance of our product to serve enterprise customers at scale. You will involve the architecture…
Added 5 hours ago
Java Full Stack Developer
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We are seeking a hands-on Senior Full Stack Developer with strong expertise in Angular and Java to contribute to the evolution of a large-scale enterprise platform.
Added 5 hours ago
Software Engineer - Health Systems
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Kitchener, ON
…health systems technology initiatives. You will work across the full stack to translate clinical and operational requirements into reliable software, develop planning and analytics…

AceStack

Senior Full Stack Engineer : Toronto, ON : Hybrid : FTE

Toronto, ON, Canada

Job type: Full-time
Apply by: Oct 30, 2026
Posting language: English
Posted: Sep 30, 2026

Apply About employer

Applications open in a new tab.

Original job description

Role: Senior Full Stack Engineer

Location: Toronto, ON

Work Model: Onsite

Experience: 5+ Years

Role Overview

We are seeking a Senior Full Stack Engineer with strong hands-on experience in Java, Spring Boot, REST APIs, microservices, unit testing, and software engineering best practices. The ideal candidate will have a strong focus on clean code, test-driven development, application security, code quality, and CI/CD automation, with exposure to modern frontend and cloud technologies.

Key Responsibilities

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Design, develop, test, and maintain scalable Java applications, REST APIs, and microservices using clean code principles and established design patterns.

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Develop modular, reusable, maintainable, and highly testable software components.

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Write comprehensive unit tests using JUnit and Mockito and drive high-quality test coverage.

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Apply Test-Driven Development (TDD) and continuous testing practices to improve reliability and prevent regressions.

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Apply strong knowledge of Core Java, including collections, generics, streams, lambdas, concurrency, multithreading, exception handling, and JVM memory management.

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Develop and maintain backend services using Spring/Spring Boot and RESTful API technologies.

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Follow secure coding practices and incorporate security-by-design principles throughout the software development lifecycle.

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Conduct code reviews, participate in pair programming, and enforce coding standards, SOLID principles, clean code, and design patterns.

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Refactor legacy code and reduce technical debt while improving application performance, maintainability, and testability.

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Integrate automated testing, static code analysis, code coverage, and security scanning into CI/CD pipelines.

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Use tools such as SonarQube and JaCoCo to monitor and continuously improve code quality and test coverage.

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Work closely with architects, business/application analysts, QA, operations, and other cross-functional teams in an Agile environment.

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Troubleshoot and resolve complex application issues related to functionality, performance, security, and reliability.

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Contribute to CI/CD automation using tools such as Jenkins, Maven/Gradle, Git, and Bitbucket.

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Evaluate and adopt modern engineering practices, including AI-assisted development and developer experience tools, where they can improve productivity and software quality.

Required Skills & Experience

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5+ years of professional software development experience with Java and/or Node.js across the full software development lifecycle.

•

Strong hands-on expertise in Core Java, including:

◦

Collections and Generics

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Streams and Lambdas

◦

Concurrency and Multithreading

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Exception Handling

◦

JVM memory management

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Strong experience with Spring/Spring Boot, REST APIs, and microservices.

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Proven experience developing effective unit tests using JUnit and Mockito or equivalent mocking frameworks.

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Strong understanding of TDD, test automation, and continuous testing.

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Strong knowledge of Clean Code, SOLID principles, design patterns, refactoring, and code quality practices.

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Working knowledge of application security and secure coding practices, including OWASP Top 10.

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Hands-on experience with SonarQube, JaCoCo, or similar code-quality and coverage tools.

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Experience integrating automated testing, quality checks, and security gates into CI/CD pipelines, preferably using Jenkins.

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Experience with Maven or Gradle and source control tools such as Git and Bitbucket.

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Strong analytical, troubleshooting, problem-solving, communication, and technical documentation skills.

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Ability to work effectively in a fast-paced, cross-functional Agile/Scrum environment.

Frontend / Full Stack Experience

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Experience with modern UI technologies such as:

◦

React or Angular

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TypeScript / JavaScript

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HTML5 / CSS

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Backend experience with Node.js is an added advantage.

Nice-to-Have Skills

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Experience with AI-assisted development tools, such as GitHub Copilot.

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Exposure to AI agents and agentic software development workflows.

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Experience with Backstage or other developer portal/platform technologies.

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Strong experience building and maintaining CI/CD pipelines and developer tooling.

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Experience with Docker and Kubernetes.

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Experience with AWS or other cloud platforms.

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Experience with Jira and Confluence.

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Experience working with developer experience/platform engineering initiatives.

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Bachelor's degree or college diploma in Computer Science, Software Engineering, or a related technology discipline.

Key Technology Stack

Apply About employer

More about this job

Responsibilities

Design, develop, test, and maintain scalable Java applications, REST APIs, and microservices, emphasizing clean code, security, test coverage, and maintainability. Collaborate with cross-functional Agile teams, improve legacy systems, troubleshoot complex issues, and integrate automated quality and security checks into CI/CD pipelines.

Requirements

Requires 5+ years of software development experience, strong Core Java and Spring Boot skills, and experience with REST APIs, microservices, unit testing, TDD, and CI/CD. Candidates should also understand secure coding, code quality practices, and modern frontend technologies such as React or Angular, TypeScript or JavaScript, HTML, and CSS.

Skills

Java
Spring Boot
REST APIs
Microservices
JUnit
Mockito
Test-Driven Development
Core Java
Application Security
Clean Code
CI/CD
SonarQube
Maven
Git
React
TypeScript

Visa sponsorship

Not detected in the job text

Keywords

Java
Spring Boot
REST APIs
Microservices
JUnit
Mockito
Test-Driven Development
Continuous Testing
Core Java
Concurrency
JVM Memory Management
OWASP Top 10
Secure Coding
Clean Code
SOLID Principles
Design Patterns
SonarQube
JaCoCo
CI/CD
Jenkins
Maven
Gradle
Git
Bitbucket
React
Angular
TypeScript
Node.js
Docker
Kubernetes

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