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Javascript developer Jobs in Vaughan, ON

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Javascript developer • vaughan on

Last updated: 1 day ago
Remote JavaScript Engineer - AI Trainer

Remote JavaScript Engineer - AI Trainer

SuperAnnotateWillowdale, Ontario, CA
Remote
Full-time
As an hourly paid, fully remote JavaScript Engineer for AI Data Training, you will review complex AI-generated code and explanations or generate new ones, evaluate the reasoning quality and step-by...Show moreLast updated: 19 days ago
Senior Software Developer (Java)

Senior Software Developer (Java)

OpenTextRichmond Hill, York Region, CA
Full-time
Senior Software Developer (Java).OpenText is a global leader in information management, where innovation, creativity, and collaboration are the key components of our corporate culture.As a member o...Show moreLast updated: 30+ days ago
Web developer

Web developer

aurora technology development incRichmond Hill, York Region, CA
Full-time
Information Technology (IT) Service Provider.Consult with clients to develop and document website requirements.Design and integrate website-related code. Write, modify, and test website-related code...Show moreLast updated: 30+ days ago
UI / UX Developer | Mech Solutions

UI / UX Developer | Mech Solutions

Mech Solutions, LtdVaughan, York Region, CA
Permanent
UI / UX Developer | Mech Solutions.We are looking for a UI / UX developer to create wireframes, interactive prototypes, and mock‑ups. Candidates must have Canadian permanent residency or citizenship.Cre...Show moreLast updated: 30+ days ago
Lead Front End Developer (React)

Lead Front End Developer (React)

Onico SolutionsRichmond Hill, Ontario, CA
Remote
Permanent
Lead Front End Developer (React).Our client, an NFT investor platform is looking for a Lead Front End Developer (React) for a long term engagement to help build sophisticated tools for a video game...Show moreLast updated: 30+ days ago
Web Developer.NET

Web Developer.NET

CB CanadaVaughan, Ontario, Canada
Full-time
Our client that is in the retail industry is looking a Web Developer (.This position is responsible for developing innovative, reusable Web-based tools. This is a hands-on development role to develo...Show moreLast updated: 30+ days ago
  • Promoted
Dotnet Developer

Dotnet Developer

freelance.caVaughan, Canada
Temporary
Our client is one of the world’s leading Scientific Test and Measurement organizations.As Senior C# Developer, you’d on our client’s next-generation OS platform, focused on designing innovative fea...Show moreLast updated: 4 days ago
Dotnet Developer

Dotnet Developer

SystematixVaughan, York Region, CA
Temporary
We are Systematix and we are currently looking for a.R&D team with one of our Life Science clients.This role is hybrid, 3 days per week on-site in Vaughan. Our client is one of the world’s leading S...Show moreLast updated: 1 day ago
OTBI Developer

OTBI Developer

Newport WilliamsVaughan, York Region, CA
Full-time +1
Direct message the job poster from Newport Williams.Our client is seeking a skilled and experienced Oracle Fusion Report developer for a permanent position. This is a hybrid role, with the expectati...Show moreLast updated: 2 days ago
IT Developer

IT Developer

NorancoVaughan, York Region, CA
Full-time
Posted Friday, November 18, 2016 at 5 : 00 AM.Noranco is a world class, integrated manufacturer and solutions provider to the international commercial and military aerospace sectors.We provide added ...Show moreLast updated: 10 days ago
AI Developer

AI Developer

SCIEXVaughan, York Region, CA
Full-time
Get AI-powered advice on this job and more exclusive features.Are you ready to accelerate your potential and make a real difference within life sciences, diagnostics and biotechnology? At SCIEX, on...Show moreLast updated: 30+ days ago
Jr or Intermediate ASP web developer

Jr or Intermediate ASP web developer

ROSSRichmond Hill, York Region, CA
Full-time
Our client, an award winning web development company is looking to add a Junior – Intermediate ASP web developer to their team. This individual will be responsible for working on a range of projects...Show moreLast updated: 30+ days ago
Sr. Salesforce Developer

Sr. Salesforce Developer

TalentSphere Staffing SolutionsVaughan, York Region, CA
Full-time
TalentSphere Staffing Solutions.Senior Salesforce Developer Lead.IT client with deep expertise in the Salesforce platform to help design, develop, and maintain mission‑critical CRM solutions.The id...Show moreLast updated: 11 days ago
Sr. SharePoint Developer

Sr. SharePoint Developer

Medavie Blue CrossON, CA
Full-time +1
What makes us a different kind of employer?.As a national health solutions partner, Medavie is committed to improving the wellbeing of Canadians — and in our digital-first culture, technology is ke...Show moreLast updated: 30+ days ago
Senior / Team Lead Full Stack (Node.js / React) developer (Toronto, hybrid)

Senior / Team Lead Full Stack (Node.js / React) developer (Toronto, hybrid)

TechMagicToronto, hybrid, Ontario, Canada
Full-time
We are looking for a skilled Senior / Team Lead Full Stack (Node.React) developer with 5+ years of professional experience to join our project for working on enterprise-level project from the Canada....Show moreLast updated: 5 days ago
Salesforce Developer

Salesforce Developer

Staples CanadaRichmond Hill, York Region, CA
Full-time
Get AI-powered advice on this job and more exclusive features.The Salesforce Developer is a vital member of the CRM team responsible for developing and supporting solutions within the Salesforce.An...Show moreLast updated: 7 days ago
Senior Software Developer Front End

Senior Software Developer Front End

Randstad CanadaNorth York, Ontario, CA
Temporary
Quick Apply
Do you have experience in React, REST APIs, JavaScript and TypeScript, Node.NextJS? Do you have knowledge in Web Content Accessibility Guidelines (WCAG) for web application development? If so, this...Show moreLast updated: 30+ days ago
  • Promoted
FRONT-END DEVELOPER

FRONT-END DEVELOPER

Finlink GroupMaple, ON, Canada
Full-time
Bring ideas to life with code that feels as smooth as it looks.We’re searching for a talented Front-End Developer who’s passionate about building sleek, scalable, and intuitive web appl...Show moreLast updated: 30+ days ago
JPC -1461 - Senior Web Developer

JPC -1461 - Senior Web Developer

ITS GlobalOntario
Full-time
Our client is looking for a Senior Web Developer to join their team.Developing new user-facing features using React.Building reusable components and front-end libraries for future use.Translating d...Show moreLast updated: 30+ days ago
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Remote JavaScript Engineer - AI Trainer

Remote JavaScript Engineer - AI Trainer

SuperAnnotateWillowdale, Ontario, CA
19 days ago
Job type
  • Full-time
  • Remote
Job description

As an hourly paid, fully remote JavaScript Engineer for AI Data Training, you will review complex AI-generated code and explanations or generate new ones, evaluate the reasoning quality and step-by-step problem-solving, and provide expert feedback that helps models produce answers that are accurate, logical, and clearly explained. You will assess solutions for accuracy, clarity, and adherence to the prompt, identify errors in methodology or conceptual understanding, fact-check information, write high-quality explanations and model solutions that demonstrate correct methods, and rate and compare multiple AI responses based on correctness and reasoning quality.

This role is with SME Careers, a fast-growing AI Data Services company and subsidiary of SuperAnnotate that provides AI training data for many of the world’s largest AI companies and foundation model labs. Your work will directly help improve the world’s premier AI models while giving you the flexibility of impactful, detail-oriented remote contract work.

Key Responsibilities :

  • Develop AI Training Content : Create detailed prompts in various topics and responses to guide AI learning, ensuring the models reflect a comprehensive understanding of diverse subjects.
  • Optimize AI Performance : Evaluate and rank AI responses to enhance the model's accuracy, fluency, and contextual relevance.
  • Ensure Model Integrity : Test AI models for potential inaccuracies or biases, validating their reliability across use cases.

Your Profile :

  • Minimum 2+ years of professional JavaScript experience in production environments.
  • Strong understanding of closures, async / await, prototype-based inheritance, and JavaScript event loop behavior, with deep proficiency in modern Vanilla JavaScript (ES6 / ES2015+).
  • Proven ability to evaluate correctness, readability, and performance of JavaScript code, including identifying subtle logic and edge-case issues.
  • Hands-on work experience in software engineering, preferably in roles involving code review, mentoring, or technical design discussions.
  • Significant experience using LLMs or AI coding assistants while programming, combined with a critical mindset for validating their output.
  • Excellent English writing skills, capable of producing clear, concise, and pedagogical technical explanations.
  • Strong proficiency with at least one major frontend framework (such as React, Angular, or Vue.js) or backend runtime (such as Node.js with Express or NestJS).
  • Minimum Bachelor’s degree in Computer Science or a closely related technical field.
  • Previous experience with AI data training, data annotation, or evaluation of AI-generated technical content is a strong plus; Minimum C1 English proficiency and a highly detail-oriented working style are required.
  • Preferred : contributions or merged PRs in JavaScript or TypeScript open-source projects, familiarity with bundlers and tooling (Webpack, Vite, Rollup), frontend–backend integration and Node.js runtime behavior, reviewing typed API layers, DTOs, or schema-driven designs, and experience evaluating frontend logic, async patterns, and state management.