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Added 9 mins ago
Senior Software Developer
ADGA Group
Ottawa, ON
$100,000 to $125,000 CAD / year
Full-time
…intelligence and enforcement agencies through embedded teams, advisory services, and full project execution, applying deep operational expertise and innovation to strengthen national…
Added 10 mins ago
Registered Nurse - Emergency
William Osler Health System
Brampton, ON
Part-time
A hospital system built for and by the community, we continue to expand our services to meet the needs of a growing population, creating opportunities for increased hands-on skills…
Added 10 mins ago
Senior Mechanical Engineer, Data Centers
AECOM
Markham, ON
$125,000 to $175,000 CAD / year
Full-time
There has never been a better time to be at AECOM. With accelerating infrastructure investment worldwide, our services are in great demand. We invite you to bring your bold ideas and big…
Added 10 mins ago
Senior Electrical Engineer, Data Centers
AECOM
Markham, ON
$125,000 to $175,000 CAD / year
Full-time
There has never been a better time to be at AECOM. With accelerating infrastructure investment worldwide, our services are in great demand. We invite you to bring your bold ideas and big…
Added 25 mins ago
[C] Salesforce Engineer / Developer
MLSE (Maple Leaf Sports & Entertainment Partnership)
Toronto, ON
Part-time
MLSE is looking for a Senior Salesforce Loyalty Cloud Administrator/Developer to support the administration, configuration, development, integration, and ongoing optimization of our…
Added 25 mins ago
Business Analyst – Salesforce Financial Services Cloud, CRM & Salesforce Platform
Astra-North Infoteck Inc. ~ Conquering today’s challenges, achieving tomorrow’s vision!
Mississauga, ON
Full-time
8+ years IT experience working in a senior development role on engineering teams with at least 5 years of Salesforce Platform experience delivering large projects/programs: Salesforce…
Added 25 mins ago
Gestionnaire de Produits Solutions Industrielles / Industrial Solutions Product Manager
Airbus
Montreal, QC
Full-time
Former et diriger des équipes multidisciplinaires (MFT) pour gérer le cycle de vie des applications liées aux produits et services de la ligne de solutions industrielles A220;
Added 25 mins ago
RPA Business Systems Analyst – Power BI/Automation
Apptoza Inc.
ON · Ontario, Canada
Contract
Translate complex data findings into compelling stories, dashboards, and presentations for senior leadership and business partners.
Added 25 mins ago
Senior Conversation Bot Engineer - Dialogflow CX
Quantiphi
Toronto, ON
Full-time
Quantiphi delivers First-in-class AI solutions across Life Sciences, Healthcare, Banking, Financial Services, CPG, Manufacturing, Energy, High-Tech, Telecommunications, etc., powered by…
Added 25 mins ago
Python Developer
Siri InfoSolutions, Inc.
Toronto, ON
Contract
We are looking for an experienced Senior Python Developer with strong expertise in AWS, REST APIs, Cloud-Native Development, and CI/CD. The ideal candidate should have prior consulting or…
Added 25 mins ago
Senior Electrical Technologist Testing and Commissioning and Project Management
BBA Consultants
AB · Edmonton, AB
Full-time
The BBA Field Services team is looking for new team members who thrive on technical challenges, enjoy problem-solving and are committed to exceeding client expectations.
Added 25 mins ago
Project Manager
ADGA Group
Ottawa, ON
$125,000 to $165,000 CAD / year
Full-time
…intelligence and enforcement agencies through embedded teams, advisory services, and full project execution, applying deep operational expertise and innovation to strengthen national…
Added 25 mins ago
Business Analyst
ADGA Group
Ottawa, ON
$85,000 to $115,000 CAD / year
Full-time
…intelligence and enforcement agencies through embedded teams, advisory services, and full project execution, applying deep operational expertise and innovation to strengthen national…
Added 25 mins ago
Senior Events Planner
Cassels Brock & Blackwell LLP
Toronto, ON
Full-time
Our Toronto office is currently recruiting for a Senior Events Planner in our Business Development & Marketing Department, reporting to the Manager, Events & Client Experience. The Senior…
Added 25 mins ago
Compliance Manager
Lankin Investments
Vaughan, ON
Full-time
Lankin Investments prioritizes a people-first culture, fostering an environment that supports personal and professional development for all team members.
Added 25 mins ago
Product Manager
Raise
Brampton, ON
Full-time
Establish customer journey mapping to guide product development; then validate that learning with user testing
Added 25 mins ago
Pega Technical Lead (LSA)
K&K Global Talent Solutions INC.
Mississauga, ON
Full-time
8+ years of Banking and Financial Services experience, including at least 3 years in AML/KYC.
Added 25 mins ago
Manager, Financial Planning and Analysis
Staples Canada
Richmond Hill, ON
$110,000 to $120,000 USD / year
Full-time
…and influencing business decisions. As Manager FP&A, Business Services, you will support financial planning, forecasting, reporting, and analysis for a growing Services portfolio, including…
Added 25 mins ago
Vice President of Financial Planning Analysis
Oakbridge Search Partners
Toronto, ON · Greater Toronto Area, Canada
Full-time
Oakbridge Search Partners has been retained by a leading, multi-entity Canadian services organization to hire a VP of FP&A. This is a ground-floor opportunity to build the finance function…
Added 25 mins ago
Data Scientist
Open Systems Technologies
Mississauga, ON
Contract
…analytical findings into intuitive, actionable formats for senior stakeholders and…
Added 25 mins ago
Senior Customs Analyst
Cole International
Montreal, QC · Greater Montreal Metropolitan Area
Full-time
As a Senior Customs Analyst, you’ll play a pivotal role in navigating the complexities of international trade, ensuring compliance, and delivering efficient customs services. This position…
Added 25 mins ago
Senior Java Software Engineer
BULLIT MANAGEMENT SERVICES LIMITED
Toronto, ON
Full-time
Added 26 mins ago
Business Analyst
ADGA Group Consultants Inc
Ottawa, ON
$85,000 to $115,000 CAD / year
Full-time
…intelligence and enforcement agencies through embedded teams, advisory services, and full project execution, applying deep operational expertise and innovation to strengthen national…
Added 26 mins ago
Project Manager
ADGA Group Consultants Inc
Ottawa, ON
$125,000 to $165,000 CAD / year
Full-time
…intelligence and enforcement agencies through embedded teams, advisory services, and full project execution, applying deep operational expertise and innovation to strengthen national…
Added 26 mins ago
Senior Technical Writer
ADGA Group Consultants Inc
Ottawa, ON
$90,000 to $100,000 CAD / year
Full-time
…intelligence and enforcement agencies through embedded teams, advisory services, and full project execution, applying deep operational expertise and innovation to strengthen national…

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

•

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

•

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

•

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

◦

Streams and Lambdas

◦

Concurrency and Multithreading

◦

Exception Handling

◦

JVM memory management

•

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

•

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

•

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

•

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

•

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.

•

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

•

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

•

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

•

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

Frontend / Full Stack Experience

•

Experience with modern UI technologies such as:

◦

React or Angular

◦

TypeScript / JavaScript

◦

HTML5 / CSS

•

Backend experience with Node.js is an added advantage.

Nice-to-Have Skills

•

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

•

Exposure to AI agents and agentic software development workflows.

•

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.

•

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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