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Added 2 mins ago
Data Engineer
Giesecke+Devrient
Markham, ON
On a daily basis, the Data Engineer will utilize the Identity Service Platform (IDSP) application developed in house for profile generation and monitoring orders status for telecom clients…
Added 2 mins ago
Security Engineer/SRE - AEM/Adobe
Capgemini
Toronto, ON
Comfortable with front-end technology: This platform ships JavaScript and CSS to the browser with no server tier; you cannot reason about its reliability without reading and understanding it
Added 2 mins ago
Cloud Security Engineer
Paymentus Group Inc
Richmond Hill, ON
Full-time
The Cloud Security Engineer is responsible for helping secure the cloud-native infrastructure, platforms, services, and deployment patterns that support the Paymentus SaaS platform. This…
Added 2 mins ago
Senior Sales Engineer - Data Protection
N-able
ON
Full-time
…redefining what it means to be business resilient. Our end-to-end platform blends AI-powered capabilities and flexible tech stacks, so customers can manage, secure, and recover with…
Added 17 mins ago
Platform Engineer
Viva Tech Solutions
Toronto, ON
Contract
Hands-on CICD| cloud| and platform engineering experience in enterprise environments
Added 17 mins ago
Platform Engineer (Netezza)
CBL Solutions
Toronto, ON
Contract
We are seeking a highly skilled Senior Platform Engineer with extensive experience in Big Data technologies, AWS Cloud, and data platform engineering. The ideal candidate will have strong…
Added 31 mins ago
Senior AI Platform Security Engineer
Charger Logistics Inc.
Brampton, ON
Full-time
We are looking for a highly motivated Senior AI Platform Security Engineer to join our team based out of our Brampton office and own the platform our AI agents run on. We're standardizing…
Added 32 mins ago
System Engineer
DataStealth
Mississauga, ON
Full-time
DataStealth is a single, unified data security platform (DSP) that discovers, classifies, and protects sensitive data across your entire environment, from on-premise to legacy cloud to…
Added 46 mins ago
Lead Senior Developer
Bentley Systems
Quebec, QC · Greater Quebec City Metropolitan Area
Full-time
…products. The successful candidate will help evolve an internal platform used by our global software organization to assess, govern, and improve release readiness, software quality, and…
Added 46 mins ago
Senior Automation Engineer
Actalent
Ottawa, ON
$50 to $70 CAD / hour
Contract
This Automation Engineer role focuses on building Python-based test automation and infrastructure for a next-generation embedded platform supporting future vehicle technologies. You will…
Added 46 mins ago
Controls Engineer
Actalent
Cambridge, ON
$40 to $60 CAD / hour
Contract
The Control Engineer is tasked with developing and maintaining control system software for custom robotic control systems, data acquisition, and inspection systems, as well as other…
Added 46 mins ago
Senior Data Engineer (Python / AWS / ML Pipelines)
Jobgether
Canada
Full-time
…applications and next steps. Our partner is looking for a Senior Data Engineer (Python / AWS / ML Pipelines) based in…
Added 46 mins ago
Embedded Software Engineer
Actalent
Ottawa, ON
$50 to $70 CAD / hour
Contract
Job Title: Expert Level Embedded Software Engineer
Added 47 mins ago
AI Platform Engineer, Silicon Design Infrastructure
Advanced Micro Devices, Inc
Markham, ON
Full-time
We are seeking a hands-on engineer to build and operate the development infrastructure and AI solutions that underpin AMD's AI-assisted silicon design program. This role sits at the…
Added 47 mins ago
Silicon Design Engineer
Advanced Micro Devices, Inc
Markham, ON
Full-time
Strong background in the C++ language, preferably on Linux with exposure to Windows platform
Added 47 mins ago
Senior Identity & Access Management Engineer
Charger Logistics Inc
Brampton, ON
Senior IAM Engineer – Non-Human & AI Agent Identity
Added 47 mins ago
Senior AI Platform Security Engineer
Charger Logistics Inc
Brampton, ON
We are looking for a highly motivated Senior AI Platform Security Engineer to join our team based out of our Brampton office and own the platform our AI agents run on. We're standardizing…
Added 47 mins ago
Carbody Structure Designer
Alstom
Saint-Bruno, QC
You’ll specifically take care of designing products aligned with project, platform, and industrialization requirements, but also supporting the CBS MLE (Mechanical Lead Engineer for Carbody…
Added 1 hour ago
Senior Software Engineer - Conversational AI (Python)
Glia
Remote, Canada
Full-time · Remote
Glia is the #1 Banking AI platform, empowering community and regional financial institutions to create efficiencies, accelerate loan growth, drive deposits, and deliver experiences that win…
Added 1 hour ago
Senior Identity & Access Management Engineer
Charger Logistics Inc.
Brampton, ON
Full-time
Senior IAM Engineer - Non-Human & AI Agent Identity
Added 1 hour 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 2 hours ago
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Quartz
Open Hall, NL
Full-time
Quartz is reimagining wealth management through personalised intelligence. It's the first wealth platform that truly learns from you, understands your goals, and helps you make confident,…
Added 2 hours ago
←
Quartz
Open Hall, NL
Full-time
Quartz is reimagining wealth management through personalised intelligence. It's the first wealth platform that truly learns from you, understands your goals, and helps you make confident,…
Added 3 hours ago
MuleSoft Integration Engineer
Intellibee Inc
ON · Durham, ON
Full-time
MuleSoft Integration Engineer, Durham, NC, US
Added 3 hours ago
L2 Duty Technical Support Engineer
Sippy Software, Inc.
Canada
Contract
Sippy Softswitch delivers a complete network management solution for VoIP carriers on a single platform. This call-control software package enables service providers to build scalable and…

Closed listing

AceStack

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

Toronto, ON, Canada

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

This opening has closed.

The original listing is kept below for reference.

Find open jobs More jobs with this employer

About employer

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Added 1 hour ago
Senior Full Stack Engineer : Toronto, ON : Hybrid : FTE
AceStack · Toronto, ON, Canada

Search current openings

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.

•

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.

•

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

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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.

•

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.

•

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.

•

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

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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