About Crystal Yong | Contra Crystal Yong

Crystal Yong

Crystal Yong

Full Stack Developer | Marketplaces, Stripe Connect, SEO

New to Contra

Crystal is ready for their next project!

Toronto, Canada

Work Posts Services About

Toronto, Canada

Meet Crystal

Followed by Joaquín P

Software Development, DevOps Cloud, & Technical SEO professional specializing in custom platforms, marketplaces, and booking apps — built with React/Next.js, Node.js, SQL, and Stripe. I focus on ROI-driven development, SEO-optimized design, scalable cloud deployments, and clean architecture that delivers measurable business results.

Identity verifiedVetted for secure and trusted collaboration.

Rate

$100 - $150/hr

Skills and tools

Software Engineer SEO Specialist Software Architect Mobile Engineer

Details

Software Developer | Booking Systems, Marketplaces, SEO at CyMarketplaces

https://www.cymarketplaces.com/

Toronto, Canada

Fluent in English

Join 50k+ companies and 1M+ independents

Hire creatives Get hired

For independents

Contra Pro Manage freelance projects Get verified as an expert Find jobs Get discovered Sign contracts Send invoices Commission-free payments

For companies

For companies Manage team projects Share hiring workspace Post jobs Discover contractors Sign contracts Approve invoices Global payments & tax compliance

Use Cases

For companies For freelancers For creator tools For agencies For VCs

Resources

Partner networks Advertising Challenges Creative Human Data Human Creativity Benchmark Human in the loop API Project-based hiring calculator Guide to flexible hiring Guide for agencies Creator tools awards Customer stories Blog FAQs for freelancers FAQs for companies Referrals

Hire Freelancers

Explore all Top independents Design Engineering Marketing Music & audio Social media Video & animation Product Business consulting & HR Other

Company

Mission Careers Terms & conditions Privacy policy Cookie policy

Contact

Contact support

For independents

Contra Pro Manage freelance projects Get verified as an expert Find jobs Get discovered Sign contracts Send invoices Commission-free payments

For companies

For companies Manage team projects Share hiring workspace Post jobs Discover contractors Sign contracts Approve invoices Global payments & tax compliance

Use Cases

For companies For freelancers For creator tools For agencies For VCs

Resources

Partner networks Advertising Challenges Creative Human Data Human Creativity Benchmark Human in the loop API Project-based hiring calculator Guide to flexible hiring Guide for agencies Creator tools awards Customer stories Blog FAQs for freelancers FAQs for companies Referrals

Hire Freelancers

Explore all Top independents Design Engineering Marketing Music & audio Social media Video & animation Product Business consulting & HR Other

Contact

Contact support

Company

Mission Careers Terms & conditions Privacy policy Cookie policy

© 2026 Contra.Work Inc