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Junior Full Stack Software Developer Jobs in Ontario

AltaML

Senior Full Stack Software Engineer

Toronto, ON · On-site

Degree or equivalent work experience in Computer Science, Software Development, or similar * 5+ years of experience as a full stack developer * Demonstrable, hands-on experience using Claude (Claude ...

Ignite Talent Solutions

$100K - $150K/yr

Lead Full Stack Developer / Solutions Architect - North America (Remote) Our client is an ... Excellent leadership skills to mentor and guide junior engineers, with experience in technical ...

Sync.com

Software Developer

Toronto, ON · On-site

CA$97K - CA$100K/yr

Key Responsibilities * Design, develop, and deploy full stack applications using Node.js, ... Experience mentoring junior developers or interns. Perks: * Generous wellness program * Best-in-the ...

hireVouch

Sr Full Stack SW Eng

Toronto, ON · On-site

Senior Full Stack Software Engineer Our client is looking for an experienced software engineer with a founder mindset to take a critical role in our rapidly growing early-stage startup. We believe ...

Brickeye

Senior Full Stack Software Engineer

Toronto, ON · On-site

CA$130K - CA$160K/yr

The Engineer We're Looking For We're looking for a talented Full Stack Engineer who loves solving ... AWS Certified Developer or Solutions Architect certification * Architecture experience: Serverless ...

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All JobsFull Stack Software Developer JobsJunior Full Stack Software Developer JobsJunior Full Stack Software Developer Jobs in Ontario

Junior Full Stack Software Developer information

See Ontario salary details

$38.5K

$98.3K

$165K

How much do junior full stack software developer jobs pay per year?

As of Jun 11, 2026, the average yearly pay for junior full stack software developer in Ontario is $98,300.00, according to ZipRecruiter salary data. Most workers in this role earn between $73,000.00 and $120,500.00 per year, depending on experience, location, and employer.

What does a Junior Full Stack Software Developer do?

A Junior Full Stack Software Developer is responsible for assisting in the design, development, and maintenance of both front-end and back-end components of web applications. They work with various programming languages, frameworks, and databases to build and support software solutions. Typically, they collaborate with senior developers and other team members to learn best practices, resolve bugs, and implement new features. This role is ideal for those who have foundational programming knowledge and are looking to gain hands-on experience across the entire software development stack.

What is the difference between Junior Full Stack Software Developer vs Junior Front End Developer?

AspectJunior Full Stack Software DeveloperJunior Front End Developer
Required SkillsProficiency in both front-end and back-end technologies (HTML, CSS, JavaScript, server-side languages, databases)Strong skills in HTML, CSS, JavaScript, and front-end frameworks (React, Angular)
Work EnvironmentInvolved in both client-side and server-side development, often in full project cyclesPrimarily focused on user interface and client-side features
Common UsageUsed in roles requiring versatile development across the stackUsed in roles specializing in UI/UX and front-end design

The main difference is that a Junior Full Stack Software Developer works on both front-end and back-end tasks, while a Junior Front End Developer focuses solely on the user interface and client-side development. The full stack role requires broader skills, whereas the front-end role specializes in creating engaging user experiences.

What are some typical daily tasks and collaboration expectations for a Junior Full Stack Software Developer?

As a Junior Full Stack Software Developer, your daily tasks often include writing and testing code for both front-end and back-end components, debugging issues, and participating in code reviews. You’ll regularly collaborate with other developers, designers, and sometimes product managers during stand-up meetings or sprint planning sessions to ensure alignment on project goals. It's common to work under the guidance of senior developers while learning best practices and receiving constructive feedback. This collaborative environment not only helps you grow technically but also improves your communication and teamwork skills.

What are the key skills and qualifications needed to thrive as a Junior Full Stack Software Developer, and why are they important?

To excel as a Junior Full Stack Software Developer, you need a solid understanding of programming languages (such as JavaScript, Python, or Java), front-end and back-end frameworks, and a relevant degree or coding bootcamp experience. Familiarity with tools like Git, databases (e.g., SQL, MongoDB), and cloud platforms, as well as knowledge of agile methodologies, is typically expected. Problem-solving ability, eagerness to learn, and effective teamwork are standout soft skills in this role. These skills and qualities ensure you can build, maintain, and improve applications efficiently while collaborating well within a development team.
What are the most commonly searched types of Full Stack Software Developer jobs in Ontario? The most popular types of Full Stack Software Developer jobs in Ontario are:
What are popular job titles related to Junior Full Stack Software Developer jobs in Ontario? For Junior Full Stack Software Developer jobs in Ontario, the most frequently searched job titles are:
What job categories do people searching Junior Full Stack Software Developer jobs in Ontario look for? The top searched job categories for Junior Full Stack Software Developer jobs in Ontario are:
What cities in Ontario are hiring for Junior Full Stack Software Developer jobs? Cities in Ontario with the most Junior Full Stack Software Developer job openings:
Junior Full Stack Software Developer jobs near you
Infographic showing various Junior Full Stack Software Developer job openings in Ontario as of June 2026, with employment types broken down into 32% Full Time, 50% Part Time, and 18% Temporary. Highlights an 89% Physical, 3% Hybrid, and 8% Remote job distribution, with an average salary of $98,300 per year, or $47.3 per hour.

Senior Full Stack Software Engineer

AltaML

Toronto, ON • On-site

Full-time

Posted 21 days ago

Job description

We're looking for a Senior Full Stack Software Engineer who is passionate about building high-quality software in an AI-native way. Someone who treats Claude and the latest agentic coding tools as a core part of their craft, not a novelty. In this role, you will own technical delivery end-to-end, from shaping the architecture of ML-powered applications to leading implementation across cloud services, APIs, and modern front-end frameworks, with Claude Code, the Claude Agent SDK, and the Claude API woven into how you design, build, and ship.

You will act as the technical backbone of your project pod, balancing hands-on development with technical leadership, architectural decision-making, and client-facing collaboration. You'll lead epic-level solution design, mentor developers on how to get the most out of Claude in their day-to-day workflows, contribute to shared internal frameworks and skills/plugins, and help shape how we evaluate and deploy emerging AI engineering tooling.

You will thrive in this role if you are:

  • A builder at heart who leans on Claude Code to spin up prototypes in hours and scale them into production-grade systems with confidence.
  • Fluent in agentic development patterns. Writing good specs for Claude, structuring repos so AI agents can navigate them, reviewing AI-generated code critically, and knowing when to delegate versus when to hand-code.
  • A strong communicator who can translate between business requirements, technical realities, and what modern AI tooling actually makes feasible.
  • A decision-maker who brings clarity to ambiguous technical challenges and can evaluate when an LLM-in-the-loop is the right solution versus traditional software.
  • Excited by ML-enabled product development and eager to bridge software engineering with intelligent automation and agentic workflows.
What You'll Do:
  • Reduced Project Risk: Technical risks on projects are significantly reduced through proactive ownership of epic-level technical design, execution, and cross-team dependency resolution accelerated by effective use of Claude for research, code review, and rapid exploration of design alternatives.
  • Improved Technical Decision-Making: The team makes better technology choices through thorough research, evaluation, and documentation of potential solutions, including informed decisions on when and how to apply Claude, MCP servers, and agentic tooling versus conventional approaches.
  • Stronger Client Confidence: Client and stakeholder confidence is increased by leading technical discovery sessions and acting as a technical SME during project discussions, including on the pragmatic use of LLMs and AI-assisted development in client deliverables.
  • Feature & Epic Implementation: Leads implementation for features spanning multiple user stories or services, using Claude Code and agent-driven workflows to accelerate delivery without sacrificing quality.
  • Architecture & Solution Design: Leads the architecture design for moderately complex solutions, often involving multiple services or systems, and chairs technical reviews including architecting LLM-powered features, agent tool integrations, and MCP server designs.
  • AI Engineering Leadership: Champions best practices for working with Claude across the pod, prompt design, skill and subagent creation, context management, MCP integrations, evaluation of AI-generated code, and secure / cost-aware usage of the Claude API.
  • Mentorship & Technical Leadership: Provides technical leadership within the pod, mediates code review disputes, contributes new features and skills to shared AltaML libraries, and assists in the hiring process by conducting technical interviews. Coordinates the work of other engineers and levels them up on modern AI-assisted development.
  • Client Engagement & Discovery: Leads technical discovery sessions with clients to clarify requirements, define technical scope, and identify where Claude-powered features or agentic workflows unlock real product value.
  • Testing & Quality Strategy: Implements higher-level testing strategies, including integration and end-to-end tests for deployed solutions, plus evaluation harnesses for LLM-powered features (regression tests for prompts, agent behaviours, and tool use).
What You Bring:
  • Degree or equivalent work experience in Computer Science, Software Development, or similar
  • 5+ years of experience as a full stack developer
  • Demonstrable, hands-on experience using Claude (Claude Code, claude.ai, or the Claude API) as a daily driver for real software engineering work, not just casual chat use
  • Proven skills at taking ideas from conception to production, including shipping features that are partly or fully built with AI-assisted workflows
  • Strong working experience with Cloud Services (ideally Azure)
  • Strong working experience in a modern object-oriented language
  • Strong working experience writing clean, readable, and easily maintainable code, and a clear point of view on reviewing and hardening AI-generated code
  • Experience with Unit and API testing (e.g., xUnit, Postman, or others)
  • Experience working in an agile environment
  • Experience with Docker
  • Proficiency with Version Control systems (VCS), including working effectively with AI agents in a git-based workflow
$130,000 - $150,000 a year
We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.
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