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Added 4 mins ago
SM
RQ00824 – Security Architect – Senior
S M Software Solutions Inc
Toronto, ON
- Full-time
We are seeking a Senior Security Architect with extensive experience in Cyber Security Incident Response (CSIRT/SOC), incident coordination, security program maturity, and hands-on Zero…
Added 19 mins ago
MF
Staff Software Engineer
Magnet Forensics
Canada
- Full-time
As a Staff Software Engineer on our Architecture team, you’ll help shape the foundation of how all our SaaS products are built and experienced. Our goal is to enable product teams to…
Added 19 mins ago
JS
Lead Systems Engineer
Jonas Software
Markham, ON · Toronto, ON · Canada - Markham - Ontario
- Full-time
The Lead Systems Engineer serves as a senior technical subject matter expert responsible for designing, implementing, optimizing, and supporting CORA Group's enterprise infrastructure…
Added 49 mins ago
Senior Lead Systems Engineer
Braze
Toronto, ON
We're looking for a Senior Lead Systems Engineer who's passionate about building the next generation of enterprise technology through automation, software engineering, AI, and intelligent…
Added 49 mins ago
AC
Principal Presales Solutions Architect
Adastra Corporation
Markham, ON
- Full-time
Adastra Canada is looking for a well-rounded senior architect to lead the technical side of our pursuits turning an ambiguous client problem into an architecture, a delivery approach, and a…
Added 1 hour ago
TI
Database Administrator
Teckhorizon Inc
Toronto, ON
- Contract
…infrastructure, enterprise applications, financial systems, and cloud migration…
Added 2 hours ago
M
Senior Java Full Stack Developer
Miratech
Toronto, ON
- Full-time
We are looking for a Senior Full Stack Developer to design, build and maintain both front-end interfaces and back-end systems, including APIs, microservices, databases and cloud…
Added 2 hours ago
Unified Customer Experience - Senior Software Engineer
Questrade Financial Group
Toronto, ON
We’re looking for our next Senior Software Engineer. Could It Be You?
Added 12 hours ago
M
Senior Java Full Stack Developer
Miratech
Toronto, ON · Greater Toronto Area, Canada
- Full-time
We are looking for a Senior Full Stack Developer to design, build and maintain both front-end interfaces and back-end systems, including APIs, microservices, databases and cloud…
Added 12 hours ago
M
Senior Java Full Stack Developer
Miratech
Toronto, ON
- Full-time
We are looking for a Senior Full Stack Developer to design, build and maintain both front-end interfaces and back-end systems, including APIs, microservices, databases and cloud…
Added 12 hours ago
M
Senior Full Stack Java Engineer - Workforce Management (WFM)
Miratech
Canada
- Full-time
We are looking for a Senior Full Stack Engineer to join the Workforce Management product stream and build enterprise-scale solution supporting forecasting, capacity planning, scheduling,…
Added 16 hours ago
MC
Senior Cybersecurity Test Engineer (35651)
Myticas Consulting
Ottawa, ON
- Contract
We are seeking a Senior Cybersecurity Test Engineer to lead and execute security testing activities across applications, infrastructure, cloud environments, APIs, and system integrations.…
Added 16 hours ago
MC
Technical Consultant III (35732)
Myticas Consulting
Toronto, ON
- Full-time
Technical Consultant III (Software Engineer, Senior/Lead)
Added 16 hours ago
MC
Data Analyst – Power BI Microsoft Fabric (35903)
Myticas Consulting
Ottawa, ON
- Full-time
Reporting to a senior technology leader and working closely with a Data Architect, you will design and maintain dashboards, reports, data models and analytical solutions using Microsoft…
Added 16 hours ago
MC
Cloud Platform Engineer – Kubernetes (36051)
Myticas Consulting
Toronto, ON
- Contract
A senior-level, hands-on Kubernetes / Cloud Platform Engineer who can independently resolve challenging Kubernetes infrastructure and workload issues.
Added 18 hours ago
TA
Senior Machine Learning Engineer (GCP)
Tiger Analytics
Canada
- Full-time
Tiger Analytics is looking for a skilled and innovative Machine Learning Engineer with hands-on experience in Google Cloud Platform (GCP) and Vertex AI to design, build, and deploy scalable…
Added 1 day ago
M
Senior Critical Environment Electrical Engineering
Microsoft
Toronto, ON
- Full-time
Microsoft’s Cloud Operations & Innovation (CO+I) is the engine that powers our cloud services. As a CO+I Senior Electrical Engineer, you will perform a key role in delivering the core…
Added 1 day ago
A
Senior Python Developer
Ampliwork
Brossard, QC
- Full-time
We are looking for a Senior Python Developer with strong core software engineering fundamentals and hands-on experience building production-grade, cloud-native systems.
Added 1 day ago
A
Senior Python Developer
Ampliwork
Montreal, QC
- Full-time
We are looking for a Senior Python Developer with strong core software engineering fundamentals and hands-on experience building production-grade, cloud-native systems.
Added 1 day ago
PC
Cloud Infrastructure Engineer, Senior Associate
PwC Canada
Ottawa, ON
- Full-time
Implement and enforce security best practices in cloud environments, including access management, data protection, and compliance with industry standards and regulations.
Added 1 day ago
PC
Cloud Infrastructure Engineer, Senior Associate
PwC Canada
Toronto, ON
- Full-time
Implement and enforce security best practices in cloud environments, including access management, data protection, and compliance with industry standards and regulations.
Added 1 day ago
TL
CTO (Chief Technology Officer)
Total Life, Inc.
Remote, Canada
- Full-time
- Remote
Engineer for growth and engagement. You will build the features and tools that drive acquisition, activation, retention and session completion. Examples include referral loops, partner…
Added 1 day ago
E
Principal Software Engineer
EngRadar
Kitamaat 2, BC
- Full-time
This is a senior, hands-on role for an engineer who wants influence beyond a single product team. You’ll work in a highly connected environment, on a small team that supports a large…
Added 1 day ago
KG
Senior Data Center Network Engineer
K&K Global Talent Solutions INC.
Quebec, QC
- Full-time
We are seeking an expert-level Senior Data Center Network Engineer to own the design, deployment, implementation, and advanced escalation support of our enterprise-scale data center…
Added 1 day ago
SM
RQ11576 – Data Ops/Cloud Data Engineer – Senior
S M Software Solutions Inc
Toronto, ON
- Internship
We are seeking a Senior Data Ops/Cloud Data Engineer with extensive experience in cloud-based data platforms, data engineering, data pipeline development, integration services, and DataOps…

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.

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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

◦

Streams and Lambdas

◦

Concurrency and Multithreading

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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.

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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

•

Experience with modern UI technologies such as:

◦

React or Angular

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TypeScript / JavaScript

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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.

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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

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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