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Full Stack Software Developer Jobs in Ontario (NOW HIRING)

Citi

React Full Stack Developer

Mississauga, ON · On-site

Job Overview We are looking for experienced Full-Stack Software Engineers who are passionate about solving business problems through innovation and engineering practices. This role will be ...

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 ...

hireVouch

Full Stack Software Engineer II

Toronto, ON · On-site

Software Engineer II We areseeking a Software Engineer II to join our client's core team and help ... as a full-stack developer * Deep proficiency in React (Next.js), TypeScript, JavaScript, and ...

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 ...

SRED.io

Senior Full-Stack Software Engineer

Toronto, ON · Hybrid

... engineering standards * Collaborate closely with a small, high-energy team across product, design, and QA What We're Looking For: * 5+ years of full-stack development experience, ideally in a startup ...

Sync.com

Software Developer

Toronto, ON · On-site

CA$97K - CA$100K/yr

Design, develop, and deploy full stack applications using Node.js, TypeScript, Angular, Vue.js, and PHP. * Architect and implement microservices and APIs, ensuring scalability and performance.

SRED.io

Senior Full-Stack Software Engineer

Toronto, ON · Hybrid

... engineering standards * Collaborate closely with a small, high-energy team across product, design, and QA What We're Looking For: * 5+ years of full-stack development experience, ideally in a startup ...

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Full Stack Software Developer information

See Ontario salary details

$53K

$110.5K

$168.5K

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

As of Jun 9, 2026, the average yearly pay for full stack software developer in Ontario is $110,454.00, according to ZipRecruiter salary data. Most workers in this role earn between $85,500.00 and $127,000.00 per year, depending on experience, location, and employer.

What Is a Full Stack Software Developer?

A full stack developer understands the entire “stack” or layers of programming within software technology. For this job, you should be familiar with all areas of software development and how they interact with other platforms. Your responsibilities include the development of front-end and back-end coding, an understanding of different servers, networks, and hosting environments, how to use application program interfaces (API), and managing quality assurance. Education requirements for this career include a bachelor’s degree in computer science or a related field. Jobs as a full stack software developer are a good foundation for a career in IT.

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

AspectFull Stack Software DeveloperFront End Developer
SkillsProficient in both front-end and back-end technologies, including HTML, CSS, JavaScript, server-side languages, and databasesSpecializes in client-side technologies like HTML, CSS, JavaScript, and frameworks such as React or Angular
Work EnvironmentWorks on both server and client-side development, often handling entire application stacksFocuses primarily on designing and implementing user interfaces and user experience
Common UsageUsed in full project development, especially in startups and small teamsPrimarily involved in UI/UX design and front-end feature implementation

The main difference between a Full Stack Software Developer and a Front End Developer lies in their scope of work. Full Stack Developers handle both front-end and back-end development, enabling them to build complete applications. Front End Developers focus solely on creating engaging user interfaces. Your choice depends on whether you prefer working across the entire tech stack or specializing in user-facing features.

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

To thrive as a Full Stack Software Developer, you need proficiency in both front-end and back-end programming languages (such as JavaScript, HTML/CSS, Python, or Java) and a solid understanding of software development principles, often supported by a degree in computer science or equivalent experience. Familiarity with frameworks like React or Angular, server-side technologies like Node.js or Django, version control systems (e.g., Git), and cloud platforms is highly valued, along with relevant certifications. Strong problem-solving, effective communication, and collaboration skills help you stand out in multidisciplinary teams and dynamic environments. These capabilities are essential for building robust, scalable applications and ensuring smooth project delivery across the software development lifecycle.

How does a Full Stack Software Developer typically collaborate with designers and other team members during a project?

Full Stack Software Developers often work closely with UI/UX designers, backend engineers, and product managers throughout the development process. They participate in planning sessions to understand design requirements, provide technical feedback, and help translate user interface mockups into functional features. Regular meetings and collaborative tools are usually employed to ensure alignment and smooth communication, making it essential for developers in this role to be proactive and open in sharing progress or challenges. This cross-functional teamwork helps deliver cohesive, user-friendly applications that meet business objectives.

What is a Full Stack Software Developer?

A Full Stack Software Developer is a professional who is skilled in both front-end and back-end development. This means they can work on the user interface and experience (front-end), as well as the server, database, and application logic (back-end). Full Stack Developers are often proficient in multiple programming languages and frameworks, allowing them to build complete web or software applications from start to finish. Their versatility makes them valuable in teams that require a broad range of technical skills.
More about Full Stack Software Developer jobs
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:
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What are popular job titles related to Full Stack Software Developer jobs in ON? For Full Stack Software Developer jobs in ON, the most frequently searched job titles are:
Full Stack Software Developer jobs near you

Senior Full Stack Software Engineer

AltaML

Toronto, ON

Full-time

Posted 18 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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