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Stefan G.

@stefang19

5.0
3

3.4

3.4

100%

🚀 Full-Stack & Mobile Architect | Web2 + Web3

$30 USD / Hour

・

Flag of

Serbia (7:01 PM)

・

Joined on September 25, 2025

$30 USD / Hour

・

I design and build production-grade systems across mobile, web, backend, and blockchain. Most developers specialize in one layer. I architect the entire stack. Mobile: Flutter, React Native, Native Android & iOS Backend: Golang, Node.js (high-performance, scalable APIs & microservices) Frontend: React.js, Next.js, Vue.js (SSR, dashboards, product platforms) Blockchain: Solidity & Rust (secure smart contracts & Web3 integrations) I operate at an architecture level — not just a feature level. What that means for you: • Systems designed to scale from day one • Clean, testable, maintainable codebases • Performance-first backend engineering • Production-ready mobile apps • Secure, gas-optimized smart contracts • Clear technical decision-making I think in trade-offs, edge cases, and long-term maintainability. I don’t ship hacks. I build systems that survive real users. If you’re building something serious — a scalable startup, a complex platform, or a Web3 product — I’m the engineer you bring in when execution actually matters. Let’s build it properly.

Verifications

On time

100%

On budget

100%

Accept rate

100%

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Portfolio

Portfolio

13803996
Minders is a great example of how to successfully mix elements to build a strong SaaS platform. React Native, Redux on the front-end. Back-end microservices built in Python and PHP. It's a web and mobile application. Minders helps companies and their employees unlock their full human potential. It enhances their workflow. Multi-level access and permissions give HR directors more tools. They can effortlessly oversee their workforce, create surveys, and analyze employee satisfaction levels. With Minders, the relationship between managers and employees grows closer. Thus, Minders fosters a deeper understanding of individual potential and improves talent allocation.

Minders

Minders is a great example of how to successfully mix elements to build a strong SaaS platform. React Native, Redux on the front-end. Back-end microservices built in Python and PHP. It's a web and mobile application. Minders helps companies and their employees unlock their full human potential. It enhances their workflow. Multi-level access and permissions give HR directors more tools. They can effortlessly oversee their workforce, create surveys, and analyze employee satisfaction levels. With Minders, the relationship between managers and employees grows closer. Thus, Minders fosters a deeper understanding of individual potential and improves talent allocation.

Minders

Minders is a great example of how to successfully mix elements to build a strong SaaS platform. React Native, Redux on the front-end. Back-end microservices built in Python and PHP. It's a web and mobile application. Minders helps companies and their employees unlock their full human potential. It enhances their workflow. Multi-level access and permissions give HR directors more tools. They can effortlessly oversee their workforce, create surveys, and analyze employee satisfaction levels. With Minders, the relationship between managers and employees grows closer. Thus, Minders fosters a deeper understanding of individual potential and improves talent allocation.

Minders

Minders is a great example of how to successfully mix elements to build a strong SaaS platform. React Native, Redux on the front-end. Back-end microservices built in Python and PHP. It's a web and mobile application. Minders helps companies and their employees unlock their full human potential. It enhances their workflow. Multi-level access and permissions give HR directors more tools. They can effortlessly oversee their workforce, create surveys, and analyze employee satisfaction levels. With Minders, the relationship between managers and employees grows closer. Thus, Minders fosters a deeper understanding of individual potential and improves talent allocation.

Minders

Minders is a great example of how to successfully mix elements to build a strong SaaS platform. React Native, Redux on the front-end. Back-end microservices built in Python and PHP. It's a web and mobile application. Minders helps companies and their employees unlock their full human potential. It enhances their workflow. Multi-level access and permissions give HR directors more tools. They can effortlessly oversee their workforce, create surveys, and analyze employee satisfaction levels. With Minders, the relationship between managers and employees grows closer. Thus, Minders fosters a deeper understanding of individual potential and improves talent allocation.

Minders

13803979
Brandbassador is a dynamic web and mobile application designed to connect everyday users with brands, transforming them into ambassadors. The platform enables these ambassadors to complete missions and share products, helping brands increase revenue by rewarding their top contributors. http://brandbassador.com/

Brandbassador

Brandbassador is a dynamic web and mobile application designed to connect everyday users with brands, transforming them into ambassadors. The platform enables these ambassadors to complete missions and share products, helping brands increase revenue by rewarding their top contributors. http://brandbassador.com/

Brandbassador

Brandbassador is a dynamic web and mobile application designed to connect everyday users with brands, transforming them into ambassadors. The platform enables these ambassadors to complete missions and share products, helping brands increase revenue by rewarding their top contributors. http://brandbassador.com/

Brandbassador

13803958
Built pharmacy website using WordPress. Created custom WordPress Plugins to implement business logic including sales rep. Implemented commission-based revenue sharing feature.

Website Development

13803922
Omne is a 360º lifestyle app that multiplies user engagement with its innovative features. The app offers functionalities such as health assessments, insurance, games, streaming, and gamification. Since integrating a comprehensive engagement module, Omne amassed over 10 million downloads.

Build Flutter Mobile Application

Omne is a 360º lifestyle app that multiplies user engagement with its innovative features. The app offers functionalities such as health assessments, insurance, games, streaming, and gamification. Since integrating a comprehensive engagement module, Omne amassed over 10 million downloads.

Build Flutter Mobile Application

Omne is a 360º lifestyle app that multiplies user engagement with its innovative features. The app offers functionalities such as health assessments, insurance, games, streaming, and gamification. Since integrating a comprehensive engagement module, Omne amassed over 10 million downloads.

Build Flutter Mobile Application

13803996
Minders is a great example of how to successfully mix elements to build a strong SaaS platform. React Native, Redux on the front-end. Back-end microservices built in Python and PHP. It's a web and mobile application. Minders helps companies and their employees unlock their full human potential. It enhances their workflow. Multi-level access and permissions give HR directors more tools. They can effortlessly oversee their workforce, create surveys, and analyze employee satisfaction levels. With Minders, the relationship between managers and employees grows closer. Thus, Minders fosters a deeper understanding of individual potential and improves talent allocation.

Minders

Minders is a great example of how to successfully mix elements to build a strong SaaS platform. React Native, Redux on the front-end. Back-end microservices built in Python and PHP. It's a web and mobile application. Minders helps companies and their employees unlock their full human potential. It enhances their workflow. Multi-level access and permissions give HR directors more tools. They can effortlessly oversee their workforce, create surveys, and analyze employee satisfaction levels. With Minders, the relationship between managers and employees grows closer. Thus, Minders fosters a deeper understanding of individual potential and improves talent allocation.

Minders

Minders is a great example of how to successfully mix elements to build a strong SaaS platform. React Native, Redux on the front-end. Back-end microservices built in Python and PHP. It's a web and mobile application. Minders helps companies and their employees unlock their full human potential. It enhances their workflow. Multi-level access and permissions give HR directors more tools. They can effortlessly oversee their workforce, create surveys, and analyze employee satisfaction levels. With Minders, the relationship between managers and employees grows closer. Thus, Minders fosters a deeper understanding of individual potential and improves talent allocation.

Minders

Minders is a great example of how to successfully mix elements to build a strong SaaS platform. React Native, Redux on the front-end. Back-end microservices built in Python and PHP. It's a web and mobile application. Minders helps companies and their employees unlock their full human potential. It enhances their workflow. Multi-level access and permissions give HR directors more tools. They can effortlessly oversee their workforce, create surveys, and analyze employee satisfaction levels. With Minders, the relationship between managers and employees grows closer. Thus, Minders fosters a deeper understanding of individual potential and improves talent allocation.

Minders

Minders is a great example of how to successfully mix elements to build a strong SaaS platform. React Native, Redux on the front-end. Back-end microservices built in Python and PHP. It's a web and mobile application. Minders helps companies and their employees unlock their full human potential. It enhances their workflow. Multi-level access and permissions give HR directors more tools. They can effortlessly oversee their workforce, create surveys, and analyze employee satisfaction levels. With Minders, the relationship between managers and employees grows closer. Thus, Minders fosters a deeper understanding of individual potential and improves talent allocation.

Minders

13803979
Brandbassador is a dynamic web and mobile application designed to connect everyday users with brands, transforming them into ambassadors. The platform enables these ambassadors to complete missions and share products, helping brands increase revenue by rewarding their top contributors. http://brandbassador.com/

Brandbassador

Brandbassador is a dynamic web and mobile application designed to connect everyday users with brands, transforming them into ambassadors. The platform enables these ambassadors to complete missions and share products, helping brands increase revenue by rewarding their top contributors. http://brandbassador.com/

Brandbassador

Brandbassador is a dynamic web and mobile application designed to connect everyday users with brands, transforming them into ambassadors. The platform enables these ambassadors to complete missions and share products, helping brands increase revenue by rewarding their top contributors. http://brandbassador.com/

Brandbassador

13803958
Built pharmacy website using WordPress. Created custom WordPress Plugins to implement business logic including sales rep. Implemented commission-based revenue sharing feature.

Website Development

13803922
Omne is a 360º lifestyle app that multiplies user engagement with its innovative features. The app offers functionalities such as health assessments, insurance, games, streaming, and gamification. Since integrating a comprehensive engagement module, Omne amassed over 10 million downloads.

Build Flutter Mobile Application

Omne is a 360º lifestyle app that multiplies user engagement with its innovative features. The app offers functionalities such as health assessments, insurance, games, streaming, and gamification. Since integrating a comprehensive engagement module, Omne amassed over 10 million downloads.

Build Flutter Mobile Application

Omne is a 360º lifestyle app that multiplies user engagement with its innovative features. The app offers functionalities such as health assessments, insurance, games, streaming, and gamification. Since integrating a comprehensive engagement module, Omne amassed over 10 million downloads.

Build Flutter Mobile Application

5.0 · 3 Reviews
Reviews
M

Fix FOSSBilling Gateway Bugs • €250 EUR

It was a pleasure to work with Stefan. I hope to continue working with him

Info M.

@mirtapbx

•

Flag of

06, Italy

•

17 days ago

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Opencart 3.0 Restore & Server Fixes and Cloudflare Pro Checkup • $100 USD

Yes, Stefan did super job for us. He restored our site to healthy state. It was not simple restore - that site had miss-matched tables and he fixed it all one by one manually. Then our faulty backup system set on WHM Panel was not working either - he fixed that as well. Then he upload all the languages we asked for so now we can show up in other counties. He even fixed all the errors Maria DB 11.4 that we not intentionally upgraded (it was our fault we had no clue that this kind of upgrade developer should make not us since it messes all the files in a process). Based on the job he did for us he is super skilled in PHP, opencart, databases, SQL, css, server set up. If you want someone to do job right - hire him. We will work with him again for sure since he can be trusted and understands the issues we need to fix. Super job he did for us...truly.

Kinga K.

@KingaShoes

•

Flag of

Tinley Park, United States

•

28 days ago

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Fix concurrency double‑spend bug in simplebank transfer logic (Go + Postgres) • $110 USD

This project was little difficult, but Stefan solved the problem in professional way. He has really amazing skills in Go, and did the work on time. I highly recommend him. A+++

Giang V.

@vudinhgiang

•

Flag of

Thanh Mien, Vietnam

•

2 months ago

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