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Added 4 hours ago
SI
Full Stack Engineer
Stelvio Inc.
Saskatoon, SK
- Full-time
Design, develop, test and debug software applications in line with project requirements.
Added 6 hours ago
CG
Senior V&V Test Engineer - Autonomous Vehicles
CS GROUP
Montreal, QC
- Full-time
We are looking for a Senior V&V Test Engineer to support the validation of autonomous vehicle systems and vehicle-level interfaces.
Added 8 hours ago
HR
Software Analyst
Hitachi Rail
Toronto, ON
- Full-time
Design, code, debug, test, and review software components of low to medium complexity and criticality.
Added 9 hours ago
DO
Mechanical Structural Design Engineer
Dongguan Onlitex Electronic Co., Ltd
Major, SK
- Full-time
Added 11 hours ago
A
Manager, Software Engineering
AltaML
Toronto, ON
- Full-time
…skills library are the default way engineers design, build, test, and review software, not an optional accelerant a few people…
Added 13 hours ago
T
Staff Software Engineer
Twilio
Remote, Canada
- Full-time
- Remote
Join the team as Twilio’s next Staff Software Engineer.
Added 13 hours ago
EA
Propulsion Systems Engineer [Mechanical/Aerospace Engineer]
Eternium Aerospace
Engineer, BC
- Full-time
Added 13 hours ago
UA
Software Engineer Intern - QuantumBlack, AI by McKinsey at McKinsey & Company
UCI-OC Alliance
Engineer, BC
- Volunteer
Software Engineer Intern - QuantumBlack, AI by McKinsey
Added 14 hours ago
AM
Profiling Infrastructure Development Engineer
Advanced Micro Devices, Inc
Markham, ON
- Full-time
Design, code, test and integrate features, enhancements and bug fixes into the profiling tools stack
Added 14 hours ago
KC
Senior Embedded Software Designer
Kepler Communications Inc.
Toronto, ON
- Full-time
We're on the hunt for a top-tier Senior Embedded Software Engineer. Your focus will be on software development and maintenance required for both space and ground-based assets for a growing…
Added 14 hours ago
A
Intermediate Software Engineer
AltaML
Toronto, ON
- $90,000 to $110,000 CAD / year
- Full-time
…skills library are the default way engineers design, build, test, and review software, not an optional accelerant a few people…
Added 14 hours ago
B
Building Enclosure Engineer
BPA
Ottawa, ON · Kanata, ON
- Full-time
We are seeking a Senior Building Enclosure Engineer to join our Building Science and Restoration team.
Added 16 hours ago
AI
BAS Technologist
Ainsworth Inc
Surrey, BC
- Full-time
5+ years of BAS Engineering Technologist or BAS Engineer experience.
Added 17 hours ago
CI
Sr. Professional Engineer
Calian in Space & Technology
Ottawa, ON
- Full-time
Calian is looking for a Senior Professional Engineer for their client. Their client is responsible for the procurement and sustainment of a wide array of equipment fleets for the…
Added 19 hours ago
RG
POWER ENGINEER
Rank Group
Halifax, NS
- Full-time
Rank Group is currently seeking a Power Engineer to add to our team. This would be based out of our downtown portfolio in Halifax, Nova Scotia.
Added 21 hours ago
A
Smart 3D Administration and Support Specialist
AtkinsRéalis
Mississauga, ON
- Full-time
Configure, test and put into production S3D for new projects.
Added 21 hours ago
A
Junior Materials Engineering Technician
AtkinsRéalis
Vaughan, ON
- Full-time
…temperatures, lift thickness, surface deficiencies, ensure accuracy of test data, write quality control testing reports and reporting any concerns to the client while…
Added 21 hours ago
D
Senior Privacy Engineer
DuckDuckGo
Remote, Canada
- $178,500 USD / year
- Full-time
- Remote
…to assist in reviewing and summarizing job applications and test projects, including those tools integrated into our recruitment vendor platforms. We use AI to flag potentially fraudulent…
Added 23 hours ago
MA
Solutions Engineer
Mosaic AI
Toronto, ON
- Full-time
We’re hiring a Solutions Engineer to own the technical and operational success of our customers from pre-sale through post-sale. This is a full-lifecycle role: you’ll run POVs, lead…
Added 1 day ago
ST
Senior Systems Installation Integrator
SEGULA Technologies
Montreal, QC
- Full-time
Position Overview: We are seeking a Senior Systems Installation Integration Engineer to provide high-level technical leadership for complex aircraft development and sustaining initiatives.…
Added 1 day ago
EI
Software Development Manager
EBlock Inc.
Canada
- $160,000 to $180,000 CAD / year
- Full-time
…Director of Product and Engineering. This is a role for an engineer who leads, not a manager who used to build. You will lead a team of seven to eight experienced engineers who already own…
Added 1 day ago
BG
Junior Project Operations Manager
BV GLAZING
Niagara Falls, ON
- $50,000 to $80,000 CAD / year
- Full-time
…From Toronto to Texas, we are vertically integrated to design, engineer, manufacture and install the complete building envelope with today’s most ambitious developers. Serving both…
Added 1 day ago
UO
Electrical Engineer (Utility)
University of Alaska Fairbanks Petroleum Engineering
Engineer, BC
- Full-time
Looking for an Electrical Utilities Engineer in Easton, MD ! As an Electrical Engineer you will design, coordinate and test new electrical utility installations. Support existing…
Added 1 day ago
T
Electrical & Instrumentation Engineer
Tenova
Mississauga, ON
- Full-time
The Electrical & Instrumentation (E&I) Engineer is responsible for the design, review, implementation, commissioning, troubleshooting, and continuous improvement of electrical,…
Added 1 day ago
T
R&D Engineer- Data Scientist
Tenova
Mississauga, ON
- Full-time
The R&D Engineer - Data Science, under the direction of the R&D Manager, is responsible for analyzing operational and test data, developing algorithms, and researching, building,…

Closed listing

AceStack

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

Toronto, ON, Canada

Full-time

This opening has closed.

The original listing is kept below for reference.

Find open jobs More jobs with this employer

About employer

Job details

Job type: Full-time
Closing date: Oct 30, 2026
Posting language: English
Posted: Sep 30, 2026

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Original job description

Archived listing. The details below describe a past opening.

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.

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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.

•

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.

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Experience working with developer experience/platform engineering initiatives.

•

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

Key Technology Stack

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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