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Javascript developer Jobs in Kitchener, ON

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Javascript developer • kitchener on

Last updated: 1 day ago
JavaScript Engineer

JavaScript Engineer

SuperAnnotateCambridge, 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: 1 day ago
Mobile Developer

Mobile Developer

Cloud DX, Inc.Kitchener, Ontario, Canada
Full-time
Collaborate on the development and execution of new features for our mobile applications and SDKs.Share your technical expertise and contribute to shaping best practices in mobile development.Work ...Show moreLast updated: 7 days ago
Programming & Application Developer

Programming & Application Developer

Mafna Air Technologies IncCambridge, Ontario, Canada
Full-time +1
Quick Apply
Canadian company and one of the leaders in providing custom Air Handling Solutions and HVAC Equipment across the US, Canada, and international markets. For over 20 years, Mafna has delivered innovat...Show moreLast updated: 14 days ago
Sr. Software Developer

Sr. Software Developer

OpenTextWaterloo, Region of Waterloo, CA
Full-time
OpenText is a global leader in information management, where innovation, creativity, and collaboration are the key components of our corporate culture. As a member of our team, you will have the opp...Show moreLast updated: 30+ days ago
Senior Software Engineer - AI-Driven AgTech Platform

Senior Software Engineer - AI-Driven AgTech Platform

BinSentryKitchener, Region of Waterloo, CA
Full-time
An innovative ag-tech company based in Kitchener, Canada, is searching for a Senior Software Developer to be part of a dynamic team. This role involves building new features for the software platfor...Show moreLast updated: 1 day ago
JavaScript Software Developer

JavaScript Software Developer

ThinkoutsidethevalleyKitchener, Ontario, Canada
Full-time
Were a growing team of engineers scientists product and business experts currently working on some exiting new video technologies. Passionate about making complex issues simple and delivering soluti...Show moreLast updated: 30+ days ago
Senior Frontend Developer – Innovation

Senior Frontend Developer – Innovation

ATS AutomationCambridge, Region of Waterloo, CA
Full-time
A leading automation company in Cambridge is seeking a Software Developer to create high-performance web applications.You will collaborate with teams to enhance user interactions with automation te...Show moreLast updated: 23 days ago
Full Stack Engineer

Full Stack Engineer

BusPlanner Inc.Waterloo, Region of Waterloo, CA
Full-time
We’re looking for a Fullstack Developer with strong experience in C++ and.NET to help build and maintain our flagship platform, BusPlanner Pro, and related web-based tools.The ideal candidate will ...Show moreLast updated: 30+ days ago
  • Promoted
Dotnet Developer

Dotnet Developer

Insight GlobalWaterloo, ON, Canada
Full-time
Insight Global is seeking a skilled React and.NET Developer to join a leading client in the insurance industry.This role offers the opportunity to play a key part in shaping the organization’s evol...Show moreLast updated: 5 days ago
Java Software Developer

Java Software Developer

CB CanadaKitchener, Ontario, Canada
Temporary
Procom KW is seeking an intermediate level Java Software Developer for a long term contract role with one of our clients in manufacturing sector. Java Software Developer Job details.As a Java Softwa...Show moreLast updated: 30+ days ago
  • Promoted
Senior Front-End Developer (Typescript)

Senior Front-End Developer (Typescript)

Targeted TalentWaterloo, ON, Canada
Permanent
We are looking for an experienced.This is a permanent position that is remote to start with later relocation to.Our client is a global enterprise company with a product that you've likely used.Show moreLast updated: 30+ days ago
  • Promoted
Full Stack Engineer

Full Stack Engineer

BusPlannerWaterloo, ON, Canada
Full-time
We’re looking for a Fullstack Developer with strong experience in C++ and.NET to help build and maintain our flagship platform, BusPlanner Pro, and related web-based tools.The ideal candidate...Show moreLast updated: 30+ days ago
Full Stack Developer

Full Stack Developer

Tundra Talent CommunityCambridge, ON, Canada (Hybrid)
Full-time
Our client is seeking a Full Stack Developer to join our team.In this role, you will work with the Manufacturing Engineering Team Leader (TL) to produce scalable software solutions.The successful c...Show moreLast updated: 30+ days ago
Programming & Application Developer

Programming & Application Developer

Talent AltitudeCambridge, ON, CA
Permanent
Quick Apply
About Us : Mafna Air Technologies Inc.Canadian company and one of the leaders in providing custom Air Handling Solutions and HVAC Equipment across the US, Canada, and international markets.For over ...Show moreLast updated: 14 days ago
Mobile Developer

Mobile Developer

Cloud DXKitchener, Region of Waterloo, CA
Full-time
Cloud DX is an industry leader in digital health care, virtual care, remote patient monitoring hardware and software.The company’s award‑winning solutions enable chronically ill patients to stay at...Show moreLast updated: 4 days ago
Full-Stack Application Developer - Web & API Expert

Full-Stack Application Developer - Web & API Expert

Mafna Air Technologies Inc.Cambridge, Region of Waterloo, CA
Full-time
A leading technology firm in HVAC solutions is seeking a talented Programming & Application Developer in Cambridge, Canada. The ideal candidate will have a minimum of 2 years of experience and stron...Show moreLast updated: 4 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
Software Developer

Software Developer

CarekwKitchener, Region of Waterloo, CA
Full-time
Opportunity with a growing tech startup.The ideal candidate is passionate about building high-quality products, solving complex problems, and working with a modern tech stack.Work Arrangement : On-s...Show moreLast updated: 8 days ago
Salesforce Developer

Salesforce Developer

Ontario Teachers Insurance PlanWaterloo, Region of Waterloo, CA
Full-time
With every job, there’s always the question of “why”.Why join a company? Why be part of their mission? Here, the why is easy. It’s because at some point, we’ve all needed someone there for us.At the...Show moreLast updated: 30+ days ago
People also ask
JavaScript Engineer

JavaScript Engineer

SuperAnnotateCambridge, Ontario, CA
1 day 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.