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Senior Software Engineer Java Full Stack Jobs in Montreal, QC

Micro1

Remote Senior Software Engineer

Chambly, QC · Remote

Senior Software Engineer $50 - $100/hourpay Required Skills Python3 JAVA Rust Algorithms Basics C++ Typescript bug fixing feature implementation codebase refactoring performance optimization About ...

Micro1

Remote Senior Software Engineer

Chateauguay, QC · Remote

Senior Software Engineer $50 - $100/hourpay Required Skills Python3 JAVA Rust Algorithms Basics C++ Typescript bug fixing feature implementation codebase refactoring performance optimization About ...

Micro1

Remote Senior Software Engineer

Rawdon, QC · Remote

Senior Software Engineer $50 - $100/hourpay Required Skills Python3 JAVA Rust Algorithms Basics C++ Typescript bug fixing feature implementation codebase refactoring performance optimization About ...

Micro1

Remote Senior Software Engineer

Beauharnois, QC · Remote

Senior Software Engineer $50 - $100/hourpay Required Skills Python3 JAVA Rust Algorithms Basics C++ Typescript bug fixing feature implementation codebase refactoring performance optimization About ...

Fincentify

Senior Software Engineer

Montreal, QC · Remote

CA$195K - CA$235K/yr

To succeed at Fincentify, our future Senior Software Engineer must be a critical thinker who can ... Deliver end-to-end full-stack features: product discovery, scoping, implementation, and deployment.

Volume7

Full Stack Developer

Montreal, QC · On-site +1

CA$65K - CA$85K/yr

The role We're looking for a mid-level Full Stack Developer (2-4 years experience) to join our ... Solid experience in software engineering, including architecture and algorithms * Extensive ...

Flinks

Senior Full-Stack Developer

Montreal, QC · Remote

The Role We're hiring Senior Full-Stack Developers to build and own the client-facing product ... We're not building software for software's sake. Our products only matter when a client can see ...

Human Agency

Senior Full-Stack Engineer

Montreal, QC · On-site

As part of our team, you'll work on high-impact projects at the intersection of AI, machine learning, and secure software engineering. We're seeking a Senior Full-Stack Engineer to join our growing ...

United Airlines

Java Delivery Manager

Montreal, QC

... software products from inception to deployment. Manage project timelines, scope, resource ... full-stack developers, QA engineers, and tech leads. Manage senior stakeholders, providing ...

Autodesk

Senior Software Developer

Montreal, QC · On-site

... Senior Software Developer to join a Data Services team focused on delivering core record- and ... I or full-stack work when needed. Familiarity with master data management, data enrichment ...

Xsolla

Full-Stack Engineer

Montreal, QC · On-site

CA$90K - CA$115K/yr

ABOUT YOU We are looking for a Full-Stack Engineer who is curious, detail-oriented, and ... For the Lead Software Engineer (Mobile Native), we will conduct a background check that may include ...

Index

Full-Stack Developer

Montreal, QC · On-site

As part of its expansion, Index is looking for a new full time Software Engineer to be part of its ... Working closely with product owners, full-stack developers and designers of various teams; * Assure ...

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All JobsSoftware Engineer Java Full Stack JobsSenior Software Engineer Java Full Stack JobsSenior Software Engineer Java Full Stack Jobs in Montreal, QC

Senior Software Engineer Java Full Stack information

What are the key skills and qualifications needed to thrive as a senior software engineer Java full stack?

To thrive as a Senior Software Engineer Java Full Stack, you need deep expertise in Java, front-end frameworks like Angular or React, RESTful APIs, and a bachelor's degree in computer science or a related field. Familiarity with tools such as Spring Boot, Docker, Git, CI/CD pipelines, and cloud platforms, along with relevant certifications, is highly advantageous. Leadership, effective communication, and problem-solving skills help you mentor junior developers and collaborate across teams. These skills are vital for delivering robust, scalable solutions and driving project success in dynamic development environments.

What is a senior software engineer Java full stack?

Senior Software Engineer Java Full Stack professionals are experienced developers who work on both the front-end and back-end aspects of software applications using Java and related technologies. They are responsible for designing, developing, and maintaining complex software systems, ensuring all components work seamlessly together. These engineers often lead development teams, mentor junior developers, and make key architectural decisions to drive project success. Their expertise covers a wide range of technologies, including Java frameworks, databases, web services, and modern front-end tools.

What is the difference between Senior Software Engineer Java Full Stack vs Software Developer Java?

AspectSenior Software Engineer Java Full StackSoftware Developer Java
Required CredentialsBachelor's or Master's in CS or related, Java certifications often preferredBachelor's in CS or related, Java certifications optional
Work EnvironmentDesigning, developing, and maintaining full-stack applications, often in Agile teamsDeveloping Java-based applications, primarily backend or frontend, in various environments
Industry UsageCommon in tech companies, startups, and enterprise ITWidely used across industries for Java application development

While both roles involve Java development, Senior Software Engineer Java Full Stack typically encompasses a broader scope, including both frontend and backend responsibilities, along with leadership and design tasks. Software Developer Java may focus more narrowly on specific application components. The senior role often requires more experience and a deeper understanding of full-stack development.

What opportunities for technical leadership and mentorship are available to senior software engineer Java full stack professionals?

As a Senior Software Engineer Java Full Stack, you often have opportunities to take on technical leadership roles such as leading project teams, architecting solutions, and setting coding standards. You may also mentor junior developers, conduct code reviews, and facilitate knowledge sharing within the team. These responsibilities not only help develop your leadership skills but also position you for advancement into roles like Technical Lead or Engineering Manager. Many organizations encourage senior engineers to participate in decision-making processes and cross-functional collaboration, further broadening your impact and career growth.
What are popular job titles related to Senior Software Engineer Java Full Stack jobs in Montreal, QC? For Senior Software Engineer Java Full Stack jobs in Montreal, QC, the most frequently searched job titles are:
Senior Software Engineer Java Full Stack jobs near you
Infographic showing various Senior Software Engineer Java Full Stack job openings in Montreal, QC as of August 2026, with employment types broken down into 1% Internship, 87% Full Time, 8% Part Time, and 4% Contract. Highlights an 87% Physical, 4% Hybrid, and 9% Remote job distribution.

Remote Senior Software Engineer

Micro1

Chambly, QC • Remote

Full-time

This job post has expired today. Applications are no longer accepted.

Job description

Senior Software Engineer
$50 - $100/hourpay
Required Skills
Python3
JAVA
Rust
Algorithms
Basics C++
Typescript
bug fixing
feature implementation
codebase refactoring
performance optimization
About micro1
micro1 is the leading AI data lab for training frontier models and evaluating AI agents. Experts contribute their diverse subject matter knowledge across domains such as finance, healthcare, STEM engineering, and more. micro1 transforms that real-world expertise into high-quality training data, evaluations, and feedback loops that improve how AI systems learn, reason, and perform.

Our platform identifies and vets top talent through an AI recruiter, enabling high-quality expert contributions at scale. We aim to enable 1 billion people to do meaningful work by applying their expertise to AI. As our global expert network grows, micro1 is building the human intelligence layer for frontier AI.

Job Title: Senior Software Engineer


Job Type: Contractor (~15 hrs a week)


Location: Remote


Job Summary: In this role, you'll apply your expertise to help train next-generation AI systems. Your work will shape how models learn, reason, and perform through high-quality, real-world input. No prior experience in AI is required — your domain knowledge is what matters.


As an expert you will be creating Reinforcement Learning Environments which test an AI model’s ability to solve complex software engineering problems using Model Context Protocol (MCP) tools. Tasks may involve fixing bugs, implementing features, refactoring code, or optimizing performance while requiring agents to discover and reason over information from real MCP servers. You will design reproducible environments, deterministic verification, and golden reference solutions that accurately measure both MCP tool use and software engineering ability.



Required Skills and Qualifications:

  1. Proficiency in C++, Python, JAVA, GoLang, Typescript, or Rust.
  2. Deep understanding of algorithms, data structures, and performance tuning.
  3. Demonstrated experience in debugging complex software issues and delivering maintainable solutions.
  4. Strong background in feature development and codebase refactoring.
  5. Proven ability to optimize software for performance and scalability.
  6. Exceptional written and verbal communication skills, with a keen attention to detail.
  7. Track record of success in collaborative, cross-functional teams, ideally in remote settings.



Preferred Qualifications:

  1. Previous experience working on large-scale, distributed codebases.
  2. Familiarity with modern AI or machine learning systems is a plus, though not required.
  3. Background in participating in rigorous code reviews and contributing to the development of software best practices.


Process:

  1. Apply to the role, filling out the screening questions
  2. Complete AI Interview (approx. 30 minutes)
  3. Technical Assessment (Tentative)
  4. Hiring Manager review


Compensation Structure

Compensation is output-based; experts are paid per task that meets the project specifications. The time required to complete work may vary depending on the expert’s experience and workflow. Minimum submission requirements apply. Experts must submit a minimum of tasks per week.


Start Timeline & Availability

We typically fill roles within 48 hours and are looking for experts ready to jump in right away. If selected, we expect you to start your first tasks within 24–48 hours of completing onboarding.

Apply