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React developer Jobs in St. Catharines, ON

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React developer • st catharines on

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

Remote TypeScript Engineer - AI Trainer

SuperAnnotateThorold, Ontario, CA
Remote
Full-time
As a TypeScript Engineer, you will work remotely on an hourly paid basis reviewing AI-generated TypeScript code snippets, design proposals, and technical explanations, as well as generating your ow...Show moreLast updated: 1 day ago
Senior Product Manager (GTM Strategy)

Senior Product Manager (GTM Strategy)

mParticleRemote, Ontario Canada
Remote
Full-time
The Successful candidate will : .Product GTM : Spearhead product launches with meticulously planned go-to-market strategies, ensuring seamless orchestration and measurable impact.Drive Product Adoptio...Show moreLast updated: 30+ days ago
ASP.Net Software Developer

ASP.Net Software Developer

Clickback Inc.St. Catharines, Niagara Region, CA
Full-time
We are looking for a driven ASP.NET Core Software Developer to join our team.If you believe you can work and communicate well in a fast-paced entrepreneurial software company, we want to talk to yo...Show moreLast updated: 30+ days ago
Oracle OTM Developer / Designer

Oracle OTM Developer / Designer

Juventus ConsultingOntario
Full-time
This contract opportunity is for 5 months, the end client is in BC, with locations in Memphis, TN.Per Diem expenses range from 60 to 100 USD, depending on travel location.Some remote work is possib...Show moreLast updated: 30+ days ago
Fullstack Engineer - Ads Measurement Core

Fullstack Engineer - Ads Measurement Core

redditRemote, Ontario, Canada
Remote
Full-time
Reddit is a community of communities.It’s built on shared interests, passion, and trust and is home to the most open and authentic conversations on the internet. Every day, Reddit users submit, vote...Show moreLast updated: 30+ days ago
Non-Destructive Testing Technician

Non-Destructive Testing Technician

H2R Business SolutionsNiagara Falls, Ontario, Canada
Full-time
Non-Destructive Testing Technician.Based in Niagara Falls Ontario.Through a combination of performance skill and dedication to quality we have become the fastest growing sandcasting foundry in Cana...Show moreLast updated: 30+ days ago
Software Developer

Software Developer

Meridian Credit UnionSt. Catharines, Niagara Region, CA
Full-time
Get AI-powered advice on this job and more exclusive features.At Meridian our aspiration is to integrate our purpose into everything we do for people, the planet, and communities.We believe that ou...Show moreLast updated: 7 days ago
Intermediate Software Developer

Intermediate Software Developer

PanasonicNiagara-on-the-Lake, ON, CA
Full-time
Panasonic Canada over 100 years, Panasonic has been committed to enhancing the well-being of people, communities, and society. Our technologies and solutions have been developed with one aim in min...Show moreLast updated: 30+ days ago
Senior Developer (Data)

Senior Developer (Data)

Farm Credit CanadaVarious FCC office s in Ontario may be considered
Full-time
Salary Range (plus eligible to receive a performance based incentive, applicable to position) : .Experienced data developer needed. Using your experience in Agile Scrum methodology and AWS data pipel...Show moreLast updated: 30+ days ago
Principal Architect : Lead Design, Mentor & Delivery

Principal Architect : Lead Design, Mentor & Delivery

ADPNiagara-on-the-Lake, ON, CA
Full-time
A leading human capital management services provider is seeking a Principal Architect in Niagara-on-the-Lake.This role involves designing architectural solutions and guiding teams in implementing t...Show moreLast updated: 5 days ago
iOS Developer Intern / Co-op (Remote)

iOS Developer Intern / Co-op (Remote)

TorontoJobsREMOTE, ON
Remote
Part-time +1
OS Developer Intern / Co-op (Remote).Guhuza is seeking an iOS Developer to join our remote team and contribute to the development of our iOS app. As an iOS Developer at Guhuza, you will play a cruci...Show moreLast updated: 30+ 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
Principal Software Engineer

Principal Software Engineer

ServiceTitanCanada Ontario
Remote
Full-time
We’re looking for someone to lead all technical aspects of an engineering team at ServiceTitan.You must have a strong background in responsive web application development, building distributed syst...Show moreLast updated: 30+ days ago
Web Developer

Web Developer

CB CanadaNiagara Falls, Ontario, Canada
Permanent
Our client designs, markets & sells highest performance consumer electronics that are smart, simple and stylish.From high fidelity turntables to wireless video connectivity systems, they create inn...Show moreLast updated: 30+ days ago
Software Developer

Software Developer

MeridianSt Catharines, ON L2SW3, CAN
Full-time
At Meridian our aspiration is to integrate our purpose into everything we do for people, the planet, and communities.We believe that our greatest opportunity is to create opportunity and meet peopl...Show moreLast updated: 9 days ago
Security Guard, Education

Security Guard, Education

GardaWorldSt. Catharines, ON
Full-time +1
Quick Apply
Ready to suit up as a Tactical Security Guard.What matters most in a role like this is your ability to read the environment, anticipate risk and act accordingly. Tell us about how your keen sense of...Show moreLast updated: 30+ days ago
Planet Fitness General Manager Niagara Falls

Planet Fitness General Manager Niagara Falls

Surin GroupNiagara Falls, Niagara Region, CA
Full-time
Lundys Ln Niagara Falls ON L2H 1G8 Canada.Its fun to work in a company where people truly BELIEVE in what theyre doing!.We're committed to bringing passion and customer focus to the business.As we ...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 TypeScript Engineer - AI Trainer

Remote TypeScript Engineer - AI Trainer

SuperAnnotateThorold, Ontario, CA
1 day ago
Job type
  • Full-time
  • Remote
Job description

As a TypeScript Engineer, you will work remotely on an hourly paid basis reviewing AI-generated TypeScript code snippets, design proposals, and technical explanations, as well as generating your own high-quality content and reference solutions. You will evaluate step-by-step reasoning and problem-solving, checking solutions for correctness, clarity, and adherence to the prompt; identify errors in logic, type modeling, or architectural thinking; fact-check technical information; craft clear explanations and model solutions that demonstrate correct approaches; and rate and compare multiple AI responses based on their reasoning quality and implementation soundness.

This fully remote, hourly contractor position is with SME Careers, a fast-growing AI data services company and subsidiary of SuperAnnotate that provides AI training data to many of the world’s largest AI companies and foundation model labs. In this role, your TypeScript expertise directly helps improve the world’s premier AI models used by engineers and developers everywhere.

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 :

  • 2+ years professional TypeScript experience.
  • Expertise in TypeScript features, including advanced type manipulation, generics, interfaces, and utility types.
  • Strong proficiency with a major frontend framework (e.g., React, Angular, or Vue.js) or backend runtime (e.g., Node.js with Express or NestJS).
  • Solid understanding of object-oriented programming (OOP), functional programming concepts, and common software design patterns.
  • Experience with Git and standard version control workflows (branching, merging, pull requests).
  • Familiarity with modern build tools (e.g., Webpack, Vite, Babel).
  • Minimum Bachelor’s degree in Computer Science or a closely related field.
  • Minimum C1 English proficiency (written and spoken), with strong ability to follow detailed technical guidelines.
  • Good to have : Merged PRs in TypeScript-based open-source projects.
  • Good to have : Competitive programming experience, experience reviewing typed API layers, DTOs, or schema-driven designs, and previous exposure to AI data training or annotation projects.