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Added 4 mins ago
Senior Software Engineer, Adaptive
Miovision
Remote, Canada
$130,000 to $170,000 CAD / year
Full-time · Remote
We are looking for an experienced, AI-first Senior Software Engineer to join our Adaptive team. Our Adaptive product operates at the cutting edge of real-time traffic signal optimization,…
Added 49 mins ago
Manager Experience Engineering, Android
EPITEC
Toronto, ON
Contract
Added 1 hour ago
Senior Project Manager – Engineering
Brunel
Vancouver, BC
Contract
Professional Engineer (P.Eng.) registration or eligibility for registration.
Added 1 hour ago
Senior Engineering Project Manager
Brunel
Vancouver, BC
Contract
Added 3 hours ago
QA Engineer
Ontinue
Toronto, ON
Full-time
We’re looking for a QA Automation Engineer to help us scale quality across a fast-moving engineering team. This role is about building the automation, processes, and release confidence that…
Added 4 hours ago
QA Engineer
White Widget
MB · Back, MB
Full-time
…success of projects both internally and for clients. Each QA engineer at White Widget takes ownership of quality across the entire product lifecycle. We don't just test at the end. We're…
Added 6 hours ago
Junior I&C Designer
AtkinsRéalis
Mississauga, ON
Full-time
…able to follow the instructions from a qualified professional engineer to complete the assigned I&C related scopes or tasks and prepare necessary engineering design documentation as…
Added 6 hours ago
I&C Lead Engineer
AtkinsRéalis
Mississauga, ON
Full-time
Registered Professional Engineer in the Province of Ontario, member in good standing (or P.Eng. application in final stage of approval).
Added 15 hours ago
Associate Electrical Engineer - Substation
Black & Veatch
Markham, ON
Full-time
As an Associate Electrical Engineer, you may have the opportunity to:
Added 15 hours ago
Senior QA Automation Engineer – Contact Center
N2P Systems
Toronto, ON
$110,000 to $120,000 CAD / year
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We are looking for a Senior QA Automation Engineer with strong experience in Contact Center platforms, IVR/routing automation, and test automation,
Added 15 hours ago
Application Release Engineer
J&M Group
Toronto, ON
Full-time
Added 15 hours ago
DevOps Engineer/Platform Engineer - Azure
Pet Valu
Markham, ON
Full-time
Position: DevOps Engineer/Platform Engineer - Azure
Added 15 hours ago
Full Stack Engineer
ProxyLink
Toronto, ON
$100 to $105 USD / hour
Contract
Added 15 hours ago
Senior Structural Engineer
Stantec
Calgary, AB
Full-time
Stantec is seeking a talented and experienced Senior Structural Engineer – Buildings to join our successful structural team in Calgary, Alberta. This is an opportunity for an accomplished…
Added 16 hours ago
Graphics Specialist – Building Automation / EBO (GSBA002)
Potenco
Toronto, ON · Greater Toronto Area, Canada
Full-time
Work closely with the Solution Architect / Lead EBO Engineer, Senior Systems Integrators, BAS Specialists, Controls Specialists, commissioning personnel, and project teams.
Added 16 hours ago
Director, Lifecycle Marketing
Arcady Media
Toronto, ON
Full-time
Added 16 hours ago
QE Engineer
BayOne Solutions
Canada
Contract
We are looking for an experienced QE Engineer to own quality strategy and test coverage for an innovative Visual QA Agent platform. This role combines Playwright automation, visual testing,…
Added 16 hours ago
Senior Full Stack Engineer / Toronto, ON (Onsite) - FTE
AceStack
Toronto, ON
Part-time
We are seeking a Senior Full Stack Engineer with strong hands-on experience in Java, Spring Boot, REST APIs, microservices, automated testing, and modern software engineering practices. The…
Added 16 hours ago
Senior QA Automation Engineer – Contact Center (French Speaking)
N2P Systems
Toronto, ON
$110,000 to $120,000 CAD / year
Full-time
We are looking for a Senior QA Automation Engineer with strong experience in Contact Center platforms, IVR/routing automation, and test automation, along with French-speaking capability.
Added 16 hours ago
Senior Backend Developer - Spectra
GHGSat
Montreal, QC
Full-time
We are looking for a senior engineer who wants their work to matter, who takes pride in building software that is reliable and genuinely useful, and who makes the team around them better.
Added 17 hours ago
Software Engineer in Test
ALTEN Canada
ON · Ontario, Canada
Other
Added 17 hours ago
Electrical Engineer, QA/QC & Technical Excellence
Mulvey & Banani
Toronto, ON
Full-time
About the Role: We are looking for a technically strong and detail-driven Electrical Engineer with a passion for design excellence, quality, and mentorship to join our growing team in a…
Added 18 hours ago
Senior QA Automation Engineer – Contact Center / IVR
N2P Systems
Toronto, ON
$110,000 to $120,000 CAD / year
Full-time
We are looking for a Senior QA Automation Engineer with strong experience in Contact Center platforms, IVR/routing automation, and test automation.
Added 18 hours ago
I&C Lead Engineer
AtkinsRéalis
Mississauga, ON
Full-time
Registered Professional Engineer in the Province of Ontario, member in good standing (or P.Eng. application in final stage of approval).
Added 18 hours ago
I&C Lead Engineer
AtkinsRéalis
Mississauga, ON
Full-time
Registered Professional Engineer in the Province of Ontario, member in good standing (or P.Eng. application in final stage of approval).

AceStack

Senior Full Stack Engineer / Toronto, ON (Onsite) - FTE

Toronto, ON, Canada

Job type: Part-time
Apply by: Oct 29, 2026
Experience: 5+ years of professional software development experience with strong expertise in Java and/or Node.js across the full software development lifecycle.
Posting language: English
Posted: Sep 29, 2026

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Original job description

Role: Senior Full Stack Engineer

Location: Toronto, ON

Work Arrangement: Onsite

Role Overview

We are seeking a Senior Full Stack Engineer with strong hands-on experience in Java, Spring Boot, REST APIs, microservices, automated testing, and modern software engineering practices. The ideal candidate will have a strong focus on clean code, TDD, code quality, application security, CI/CD, and scalable application development, along with exposure to modern UI and AI-assisted development technologies.

Key Responsibilities

Design, develop, test, and maintain scalable, secure, and high-quality Java applications, APIs, and microservices.
Apply clean code principles, SOLID principles, design patterns, and software engineering best practices.
Develop RESTful web services and backend applications using Java, Spring, and Spring Boot.
Build modular, reusable, maintainable, and highly testable application components.
Develop comprehensive unit and automated tests using JUnit and Mockito.
Apply Test-Driven Development (TDD) and continuous testing practices to improve quality and prevent regressions.
Leverage core Java concepts including collections, generics, streams, lambdas, exception handling, concurrency, multithreading, and JVM memory management.
Conduct code reviews, participate in pair programming, and enforce coding standards and engineering best practices.
Refactor legacy code and reduce technical debt while improving readability, performance, maintainability, and testability.
Implement security-by-design practices throughout the software development lifecycle.
Apply secure coding practices and address application vulnerabilities in accordance with OWASP and industry standards.
Integrate unit testing, static code analysis, code coverage, security scanning, and quality gates into CI/CD pipelines.
Use tools such as SonarQube and JaCoCo to monitor and continuously improve code quality and test coverage.
Work with Maven or Gradle, Git, Bitbucket, and Jenkins as part of the development and delivery lifecycle.
Diagnose and resolve complex technical, performance, security, production, and reliability issues.
Collaborate with architects, business analysts, application analysts, QA/testing teams, and operations teams in a cross-functional Agile environment.
Contribute to technical documentation, architecture discussions, design reviews, and continuous engineering improvements.
Evaluate and adopt emerging technologies, including AI-assisted development and developer experience platforms, where they provide measurable engineering value.

Required Skills & Experience

5+ years of professional software development experience with strong expertise in Java and/or Node.js across the full software development lifecycle.
Strong hands-on experience with Core Java, including:
Collections
Generics
Streams & Lambdas
Exception Handling
Concurrency & Multithreading
JVM Memory Management
Strong experience developing RESTful APIs and microservices using Spring/Spring Boot.
Hands-on experience writing effective unit tests using JUnit and Mockito or equivalent mocking frameworks.
Strong understanding and practical application of TDD, test automation, and continuous testing.
Strong knowledge of Clean Code, SOLID principles, design patterns, refactoring, and code quality practices.
Experience with SonarQube, JaCoCo, static code analysis, code coverage, and security scanning.
Experience with Maven or Gradle for build and dependency management.
Strong experience with Git and Bitbucket.
Experience integrating automated testing and quality/security gates into CI/CD pipelines, preferably using Jenkins.
Working knowledge of secure coding practices and OWASP Top 10.
Experience with modern frontend technologies such as React, Angular, TypeScript, JavaScript, HTML5, and CSS is preferred.
Strong analytical, troubleshooting, problem-solving, communication, and technical documentation skills.
Ability to work effectively in a fast-paced, Agile, cross-functional environment.

Nice to Have / Preferred Skills

Experience with Node.js and backend JavaScript/TypeScript development.
Experience with AI-assisted development tools, such as GitHub Copilot.
Exposure to AI agents, agentic development workflows, or AI-powered developer tooling.
Experience with Backstage or other developer portal/platform technologies.
Experience designing and maintaining CI/CD pipelines and developer tooling.
Experience with Docker and Kubernetes.
Experience with AWS or other cloud platforms.
Experience with Jira, Confluence, and Agile delivery methodologies.
Experience with modern developer experience and engineering productivity platforms.
University Degree or College Diploma in Computer Science, Engineering, or a related technology discipline.

Key Technical Keywords

Java, Core Java, Spring Boot, Spring, REST APIs, Microservices, JUnit, Mockito, TDD, Test Automation, Clean Code, SOLID, Design Patterns, SonarQube, JaCoCo, Maven, Gradle, Git, Bitbucket, Jenkins, CI/CD, OWASP, Secure Coding, React, Angular, TypeScript, JavaScript, Node.js, Docker, Kubernetes, AWS, Backstage, GitHub Copilot, AI Agents, Agile.

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More about this job

Responsibilities

Design, develop, test, and maintain scalable, secure Java applications, REST APIs, and microservices, applying clean code, TDD, automated testing, and secure engineering practices. Improve code quality and delivery pipelines, troubleshoot complex issues, and collaborate with cross-functional Agile teams on architecture, documentation, and engineering improvements.

Requirements

Requires 5+ years of software development experience, strong Java and Spring Boot expertise, and practical experience with REST APIs, microservices, automated testing, TDD, and CI/CD quality gates. Candidates should also know secure coding and OWASP practices, build tools, Git, and code-quality tools; frontend experience is preferred, while a related university degree or college diploma is listed as a preferred qualification.

Skills

Java
Spring Boot
REST APIs
Microservices
JUnit
Mockito
Test-Driven Development
Clean Code
SOLID Principles
SonarQube
CI/CD
Secure Coding
Git
Jenkins
React
Node.js

Visa sponsorship

Not detected in the job text

Keywords

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

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