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Full Stack Js Developer Jobs in Ontario (NOW HIRING)

StackandCo

\n \n \n \n \n The successful Senior Full Stack Developer will assume ownership for a diversity of greenfield projects and mentor junior developers. \n \n \n \n \n \n \n This role will involve adding ...

StackandCo

\n \n \n \n \n Full Stack Java Developer (Java\/JavaScript\/ReactJS) \- 520 per day \- 12 month contract \- Long term project with multinational Financial Services client \n \n \n Duration: 12 Months ...

Alquemy

Full Stack Developer

Toronto, ON

Full Stack Developer About the role: We are seeking a Full Stack Developer to design, develop, test, deploy, and support software solutions throughout the full software development lifecycle. You ...

Finlink Group

Staff Full-Stack Engineer - .NET, React & AI Location: Vaughan Set-up: In-Office Are you a highly ... NET / C# , RESTful API development, and Next.js / React , including server-side rendering and real ...

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All JobsFull Stack Js Developer JobsFull Stack Js Developer Jobs in Ontario

Full Stack Js Developer information

See Ontario salary details

$44.5K

$117K

$165.5K

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

As of Sep 9, 2026, the average yearly pay for full stack js developer in Ontario is $116,986.00, according to ZipRecruiter salary data. Most workers in this role earn between $97,500.00 and $135,500.00 per year, depending on experience, location, and employer.

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

AspectFull Stack Js DeveloperFront End Developer
Primary FocusBoth client-side and server-side development using JavaScriptClient-side development focusing on UI/UX
Required SkillsJavaScript, Node.js, frameworks like React or Angular, database knowledgeJavaScript, HTML, CSS, UI frameworks
Work EnvironmentFull-stack projects, backend and frontend tasksPrimarily frontend interfaces and user experience
Common UsageWeb applications requiring both frontend and backend developmentWebsite interfaces, interactive UI components

Full Stack Js Developers have a broader role, handling both frontend and backend tasks, while Front End Developers focus solely on creating engaging user interfaces. Both roles require JavaScript expertise, but Full Stack Js Developers also need backend skills, making them suitable for full-spectrum web development projects.

Full Stack Js Developer jobs near you
Infographic showing various Full Stack Js Developer job openings in Ontario as of August 2026, with employment types broken down into 82% Full Time, 13% Part Time, 4% Contract, and 1% Nights. Highlights an 85% Physical, 4% Hybrid, and 11% Remote job distribution, with an average salary of $116,986 per year, or $56.2 per hour.

Full-Stack Engineer (Contract - Part-Time)

Toronto, ON • On-site, Remote

mello
See more jobs at melloexternal

$100K - $150K/yr

Contractor

Re-posted 13 days ago

Key responsibilities

  • Develop, improve, and fix custom API backend as required.

  • Implement and maintain front end UI elements and experiences using frameworks like React.js or Vue.js.

  • Ensure the application can scale from 1,000 to a million users and contribute to defining engineering processes and deployment cadence.

Job description

About Us

mello is a Y Combinator (S21) backed start-up that integrates wellbeing into every employees' workflow in order to unlock their full potential. We are paving the path for the future of work. Our vision is to help every remote team on the planet to work healthier, more sustainably, and learn how to stay mello instead of burning out.

As second time founders, we burnt out building our last company during the pandemic. We wanted a simple, easy-to-use solution that integrates right into our workflow to increase our wellbeing but couldn't find anything on the market so we decided to build the solution we would've liked to use ourselves (aka, eating your own dog food).

At mello, we're building the new standard that remote and hybrid companies use to track, measure and act on burnout to inspire happier, healthier, more motivated teams. mello suggests smart actions for both employees, managers as well as HR to take to increase wellbeing, productivity and retention.

About this Role

As a modern Full-Stack Engineer, you are well versed in all aspects of development from a transistor to a website, including the browser, OS, CPU, RAM, architecture and everything. Here in mello we are much, mello-er, in requirements:

  • You will be responsible for both front end UI elements and experiences, as well as integrating, and maintaining / modifying backend services as required. The split is expected to be 63.5 / 37.5[1]
  • You will ensure the app can scale from 1000 to a million users
  • You will contribute and define our engineering values, process, and deployment cacadence, with scalability and security in mind.

Technical Skills you have:

  • IAM / OAuth (e.g. AWS Cognito, Okta)
  • Frontend frameworks i.e. React.js (Hooks preferred), Vue.js
  • In-depth CSS knowledge i.e. SCSS, Sass
  • 3rd party integrations experience with OAuth, SDK (i.e. AWS SDK), and API backend (BFF)
  • Develop, improve, and fix custom API backend as required
  • SPA Cloud deployment i.e. AWS S3 / Amplify, Netlify, Firebase a plus
  • Experience with Database ORB a plus

What you'll be doing

  • Experience with modern Front end frameworks e.g. React.js (Hooks), Vue.js and Gatsby. Familiarity with analytics is a plus.
  • Experience with OAuth flows and implementation / integration with 3rd party service
  • Experience with Front end deployment services e.g. AWS Amplify, Netlify, firebase
  • Experience with different data fetching / caching strategy and design tradeoffs, principles, and practices to help guide the team's technical direction
  • Experience with Test Driven Development and proficiency with a testing framework e.g. Jest
  • Experience with API integration as well as development. No stranger when comes to resolving CORS related nonsense
  • Experience with Database is a plus.
  • A strong desire to build secure software and protect user information.

Who you are

  • You are excited about our mission: unlocking human potential via wellbeing and the Future of Work
  • You are excited about joining a early-stage growth start-up
  • You have a growth-mindset
  • You don't mind learning a bit of everything outside engineering
  • You deeply care about UX/Design and won't compromise on quality
  • You ask "yes, and?" and are extremely collaborative
  • You're curious about how our UX Designers/Researchers conduct their work and how your work flows into theirs
  • You're proactive, a problem solver and go-getter
  • You're collaborative and are a team player
  • You're curious and self-motivated
  • You knows how to take and give direction
  • You can adapt to change quickly

Job Type: Contract (Part-Time)

Number of Hours: Up to 30hrs/week

Pay (USD): $100k - $150k

Education:

  • Bachelor's in Computer Science (Preferred)

Experience:

  • Full Stack Development: 2 years (Required)
  • DevOps: 1 years (Preferred)
Employment Type: CONTRACTOR

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