About Sergii Kirianov | Contra Sergii Kirianov

Sergii Kirianov

Pro

Sergii Kirianov

Senior FullStack Engineer building scalable digital products

New to Contra

Sergii is ready for their next project!

Calgary, Canada

Work Posts Services About

Calgary, Canada

Meet Sergii

Followed by Georgi T, Summer C, and Mukesh K

Senior full-stack engineer helping founders turn ideas into real, scalable products. Built and led development for a platform with 60,000+ users. I ship fast, clean MVPs with rock-solid engineering foundations using Next.js, Node, PostgreSQL, and modern cloud tooling.

Identity verifiedVetted for secure and trusted collaboration.

Rate

$75 - $100/hr

Skills and tools

Fullstack Engineer Frontend Engineer Web Developer Software Engineer Software Architect AI Engineer Co-Founder Engineering Manager Technical Writer

Details

Calgary, Canada

(GMT-7) Mountain Standard Time (MST), ±4 hours

Fluent in English, Russian, and Ukrainian

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 Gumroad alternative Lemon Squeezy alternative Polar alternative

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 Gumroad alternative Lemon Squeezy alternative Polar alternative

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