About Jonas B. | Contra Jonas B.

Jonas B.

Pro

Jonas B.

Dad of two, building apps portfolio

$5k+: Earned

1x: Hired

6: Followers

Work Posts Services About

Meet Jonas

Dad of two building the app portfolio and running tmbrella.studio. Get your MVP or full working app in a matter of days not weeks. Validate your idea faster.

Anything ExpertCertified by Anything as highly skilled.

Earned $5k+Verified earnings from completed projects.

Identity verifiedVetted for secure and trusted collaboration.

Rate

$75 - $100/hr

Skills and tools

AI Developer AI Engineer Android Developer iOS Developer AI Visual Design Mobile Engineer Backend Engineer Software Engineer Web Developer Engineering Manager Vibe Coder SEO Writer AI Automation React Native Developer AI Agent Designer

Google AI Studio

Details

(GMT+1) Central European Time (CET), ±5 hours

Fluent in English and Serbo-Croatian • Limited Working Proficiency in Spanish

Join 50k+ companies and 1M+ independents

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 Hackathons 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 Hackathons 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

© 2025 Contra.Work Inc