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Database developer Jobs in Welland, ON

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Database developer • welland on

Last updated: 1 day ago
Remote Senior SQL Engineer - AI Trainer

Remote Senior SQL Engineer - AI Trainer

SuperAnnotateWelland, Ontario, CA
Remote
Full-time
As a Senior SQL Engineer, you will work remotely on an hourly paid basis to review AI-generated SQL queries, database designs, and data-processing logic, as well as generate high-quality reference ...Show moreLast updated: 1 day ago
digital marketing officer

digital marketing officer

ADFUEL MEDIA INC.Niagara Falls, ON, CA
Full-time +1
Experience : 1 year to less than 2 years.Advertising, marketing and public relations agency.Advise clients on advertising or sales promotion strategies. Develop portfolio of marketing materials.Evalu...Show moreLast updated: 30+ days ago
employment coach

employment coach

CERF NiagaraWelland, ON, CA
Part-time +1
Education : Secondary (high) school graduation certificate.Experience : 1 year to less than 2 years.Interview clients to obtain employment history, educational background and career goals.Refer clien...Show moreLast updated: 1 day ago
manufacturing manager

manufacturing manager

Upper Canada Railway Services CorpWelland, ON, CA
Full-time +1
Develop production schedules and duty assignments to ensure proper functioning.Maintain an inventory of raw materials and finished products to prevent shortages. Plan and organize daily operations.D...Show moreLast updated: 30+ days 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
Junior QA Engineer

Junior QA Engineer

Welland Medical LtdWelland, Niagara Region, CA
Full-time
Welland Medical brings to market the best and most innovative products that enhance the lives of people living with a stoma across the world. Investing in the most talented people, collaborating to ...Show moreLast updated: 30+ days ago
Administrative Assistant - Falls Family Dental

Administrative Assistant - Falls Family Dental

dentalcorpNiagara Falls, Ontario
Part-time +1
Located near one of Canada’s most famous attractions, Falls Family Dental has been serving our community for over 30 years where our team is dedicated to providing the highest quality of oral care....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
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
Gestionnaire de Cas, Bilingue / Bilingual Caseworker

Gestionnaire de Cas, Bilingue / Bilingual Caseworker

CencoraRemote, ON
Remote
Full-time
Principales Fonctions Et Responsabilités : .La gestion des projets et / ou des cas assignés.L'adhésion aux processus généraux de l'entreprise. L'assistance téléphonique La mise en œuvre de programmes de...Show moreLast updated: 30+ 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
sales and marketing coordinator

sales and marketing coordinator

Wind Japanese & ThaiNiagara Falls, ON, CA
Full-time +1
Hours : 35 to 42 hours per week.Experience : 3 years to less than 5 years.Develop all kinds of events for publicity, fundraising and information purposes. Develop communication strategies.Evaluate com...Show moreLast updated: 30+ days ago
Application Support Analyst

Application Support Analyst

Juventus ConsultingOntario
Full-time
We are looking for an Application Developer both Java and.The split would be 75% Java work and 25%.This is 1 year contract, work could be out of Toronto or Waterloo. The required candidate will be a...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
iOS Engineer III, Feeds / Business Experience

iOS Engineer III, Feeds / Business Experience

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
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
  • Promoted
Building Manager Live-IN

Building Manager Live-IN

Chad Management GroupWelland, ON, Canada
Full-time
Our Client is a very prestigious Property Developer in the Toronto area.We are Looking for a Live in Building Manager Couple to Join this team. Familiar with all aspects of building operation.Strong...Show moreLast updated: 30+ days ago
  • Promoted
Secretarial Support (casual) 2025-2026

Secretarial Support (casual) 2025-2026

Niagara Catholic District School BoardWelland, Ontario, Canada
Full-time
Are you highly organized professional with excellent communication skills and an ability to multi-task? Are you.We may just have the opportunity for you. The Niagara Catholic District School Board i...Show moreLast updated: 30+ days ago
JPC - 1425 - Lead Web Backend Developer(NodeJS)

JPC - 1425 - Lead Web Backend Developer(NodeJS)

ITS GlobalOntario
Full-time
Our Client is looking for a senior web developer who is proficient in NodeJS, Serverless, AWS Lambda, and Azure functions, etc. As part of the engineering team, you will work to build software to he...Show moreLast updated: 30+ days ago
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Remote Senior SQL Engineer - AI Trainer

Remote Senior SQL Engineer - AI Trainer

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

As a Senior SQL Engineer, you will work remotely on an hourly paid basis to review AI-generated SQL queries, database designs, and data-processing logic, as well as generate high-quality reference solutions and explanations for complex data problems. You will assess solutions for accuracy, clarity, and adherence to the prompt; identify errors in methodology, query structure, indexing strategy, or conceptual understanding; fact-check data-related claims; write clear, step-by-step explanations and model solutions that demonstrate correct methods; and rate and compare multiple AI responses based on correctness, performance, and reasoning quality.

This is a fully remote, hourly paid contractor role 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. Your SQL and database engineering expertise will directly contribute to improving the world’s premier AI models used across industries.

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 :

  • Bachelor’s degree or higher in Computer Science, Information Systems, Engineering, Mathematics, or a closely related technical field.
  • 7+ years of professional experience working with SQL in production environments as a Database Engineer, SQL Developer, Data Engineer, or similar role.
  • Expert-level proficiency in SQL, including complex joins, window functions, aggregation strategies, and query plan analysis.
  • Demonstrated experience with database performance tuning, indexing strategies, and troubleshooting concurrency or locking issues.
  • Hands-on experience designing relational data models, schemas, and data warehouse structures (star and snowflake schemas).
  • Strong experience with ETL / ELT processes and tooling, as well as working with large-scale data in modern cloud or on-prem data platforms.
  • Minimum C1 English proficiency (written and spoken), with the ability to write clear technical explanations and follow detailed English-language guidelines.
  • Comfort with version control, CI / CD practices, and collaborative workflows for managing database changes.
  • Previous experience with AI data training, annotation, or evaluating AI-generated technical content is a strong plus.
  • Highly detail-oriented and systematic, with a methodical approach to evaluating reasoning quality and identifying subtle data or query issues.