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Senior Full Stack Engineer Jobs in Milton, ON (NOW HIRING)

Prophix

Senior Full-Stack Engineer

Etobicoke, ON · On-site

As a Senior Full-Stack Engineer on the FP&A Plus platform, you will design, build, and maintain the modular .NET capabilities that more than 2,500 finance teams around the world rely on every day for ...

Human Agency

Senior Full-Stack Engineer

Toronto, ON · On-site

We're seeking a Senior Full-Stack Engineer to join our growing team. In this role, you'll lead development initiatives, contribute to our SaaS products, and tackle exciting challenges in backend ...

Alquemy

Full Stack Engineer

Toronto, ON · On-site

Full Stack Engineer About the Role We are seeking an Full Stack Engineer to design, develop, deploy, and support AI-powered applications using modern large language model (LLM) technologies. You will ...

Flinks

Senior Full-Stack Developer

Toronto, ON · Remote

The Role We're hiring Senior Full-Stack Developers to build and own the client-facing product experiences at Flinks. You'll work across the Angular/TypeScript front end and the C#/.NET back end, ...

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All JobsFull Stack Engineer JobsSenior Full Stack Engineer JobsSenior Full Stack Engineer Jobs in Milton, ON

Senior Full Stack Engineer information

See Milton, ON salary details

$74.3K

$132.2K

$183.6K

How much do senior full stack engineer jobs pay per year?

As of Aug 20, 2026, the average yearly pay for senior full stack engineer in Milton, ON is $132,184.00, according to ZipRecruiter salary data. Most workers in this role earn between $111,180.00 and $151,868.00 per year, depending on experience, location, and employer.

What is a senior full stack engineer?

Senior Full Stack Engineers are experienced software developers who are proficient in both front-end and back-end technologies. They design, build, and maintain complex web applications, overseeing the entire software development process from user interface to server-side logic and databases. In addition to coding, they often mentor junior developers, lead technical decisions, and ensure best practices are followed throughout the project lifecycle. Their broad skill set allows them to bridge the gap between different development teams and deliver cohesive, high-quality solutions.

How do senior full stack engineers balance hands-on coding with mentoring and leading team projects?

Senior Full Stack Engineers often split their time between developing complex features, reviewing code, and guiding junior team members. Alongside hands-on coding, they play a key role in architectural decisions, ensuring code quality, and fostering best practices across the team. Effective communication and delegation skills are crucial, as they frequently collaborate with product managers, designers, and other engineers to align technical solutions with business goals. This balance provides opportunities for leadership growth while keeping technical skills sharp.

What are the key skills and qualifications needed to thrive as a senior full stack engineer, and why are they important?

To thrive as a Senior Full Stack Engineer, you need deep proficiency in front-end and back-end development, strong problem-solving skills, and a solid foundation in computer science, often supported by a relevant degree or equivalent experience. Familiarity with frameworks like React or Angular, back-end technologies such as Node.js or Java, cloud services, and version control systems like Git is typically required, along with experience in CI/CD and testing tools. Excellent communication, leadership, and collaboration skills help you guide teams and coordinate across disciplines. These skills are crucial for delivering scalable, high-quality software solutions and effectively leading complex projects.

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

AspectSenior Full Stack EngineerSoftware Developer
CredentialsBachelor's degree in CS or related field; experience often requiredBachelor's degree in CS or related field; entry-level to mid-level experience
Work EnvironmentCollaborates across front-end and back-end teams, often in agile settingsFocuses on coding, testing, and debugging software applications
Industry UsageCommon in tech companies, startups, and enterprise software firmsWidely used across various industries for software development roles

While both roles involve coding and software development, a Senior Full Stack Engineer typically has broader responsibilities across both front-end and back-end systems, often with more experience and leadership duties compared to a Software Developer, who may focus on specific parts of the software stack.

How much do senior full stack engineers make?

Senior full stack engineers typically earn between $100,000 and $160,000 annually, depending on experience, location, and company size. They often possess skills in multiple programming languages, frameworks, and tools, and may receive additional compensation such as bonuses or stock options.

What does a senior full stack engineer do?

A senior full stack engineer designs, develops, and maintains both the front-end and back-end components of web applications. They often lead technical projects, write clean code, and use tools like JavaScript, Python, or Java, along with frameworks such as React or Node.js. They also troubleshoot issues, optimize performance, and collaborate with cross-functional teams to deliver complete software solutions.

What cities near Milton, ON are hiring for Senior Full Stack Engineer jobs?

Cities near Milton, ON with the most Senior Full Stack Engineer job openings:

Infographic showing various Senior Full Stack Engineer job openings in Milton, ON as of August 2026, with employment types broken down into 92% Full Time, 4% Part Time, and 4% Contract. Highlights an 86% Physical, 6% Hybrid, and 8% Remote job distribution, with an average salary of $132,184 per year, or $63.5 per hour.

Senior Full Stack Software Engineer - Acquisitions and Activation (Auth0)

Okta

Toronto, ON • Hybrid

Full-time

Re-posted 12 days ago

Okta rating

9.8

Company rating: 9.8 out of 10

Based on 5 frontline employees who took The Breakroom Quiz

3rd of 245 rated software companies

Job description

Auth0 is growing rapidly and looking for exceptional new team members to help take us to the next level. One team, one score.

We never compromise on identity. You should never compromise yours either. We want you to bring your whole self to Auth0. If you're passionate, practice radical transparency to build trust and respect, and thrive when you're collaborating, experimenting and learning - this may be your ideal work environment. We are looking for team members that want to help us build upon what we have accomplished so far and make it better every day. N+1 > N.

About the Team

Here at Auth0 we're focused on securing the world's identities so innovators can innovate. We're currently hiring a senior Full Stack Software Engineer to join our Acquisitions and Activation Team.

This team owns the crucial first impressions of the Auth0 ecosystem. We apply rigorous, data-driven experimentation and A/B testing to optimize the entire early customer journey-from the moment a developer signs up, to the precise second they hit their "ah-ha" moment.

We bridge the gap between deep technical infrastructure and user psychology, building primarily on a JavaScript ecosystem (Node.js and React). If you are a full-stack engineer who loves blending robust software architecture with rapid, metrics-driven experimentation, this is the team for you.

What You Will Do
  • Optimize the Acquisition Funnel: Own, build, and continuously scale the entire signup experience to reduce friction, increase conversion, and showcase product value upfront.
  • Supercharge Activation: Build and refine full-stack features using React and Node.js for in-product onboarding guides and dashboard workflows that help new users integrate successfully and seamlessly.
  • Expand the Entry Ecosystem: Develop and maintain the portal and entry points for third-party platform integrations, ensuring a critical touchpoint for early customer success.
  • Scale our Experimentation Engine: Contribute to and utilize our internal A/B testing framework to run rapid, reliable experiments across early customer touchpoints.
  • Collaborate Across the Stack: Work closely with Product, Design, and Data Analytics to turn user behavioral insights into high-performing, production-ready full-stack features.
  • Maintain Excellence: Architect, maintain, and debug features across the full technical stack, participating in the team's on-call rotation to ensure a reliable and secure production environment.
Who You Are
  • You care deeply about developer experience (DX), application performance, and creating frictionless onboarding flows.
  • You are a seasoned Full Stack Engineer with deep production experience in JavaScript, Node.js, and React, moving fluidly between building intuitive frontend interfaces and designing robust backend services.
  • You have a strong preference for data-driven development, ideally with prior experience in A/B testing or data analysis to help interpret experiment results and user behavior.
  • You enjoy a fast-paced, iterative loop of shipping, measuring, learning, and pivoting based on concrete data.

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What Okta employees say

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