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I will build your cross platform mobile app with flutter
Karim Belkacem
Level 1
5.0
5.0
About this gig
Do you need a Flutter app that actually works on Android and iOS?
I build professional, cross-platform mobile apps with Flutter for startups, founders, and businesses that want a fast, scalable, and modern solution all from a single codebase.
Whether you're launching your first app, scaling an existing product, or need a reliable developer to finally get it done right: I've got you covered.
What I build for you:
- Custom Flutter app for Android & iOS
- Firebase & REST API integration
- Authentication systems (email, Google, Apple, etc.)
- Database connections & real-time data
- Responsive, modern UI with smooth performance
- Bug fixing, optimization & feature enhancements
Why clients choose me:
- Clean, scalable code built to grow with your business
- Strong focus on quality, performance & usability
- Transparent communication throughout the entire project
- Based in Germany reliable, structured, EU-compliant
- From idea to delivery, I support you every step of the way
You're in the right place if you are:
- A startup building your first MVP
- A business launching a new mobile product
- A founder looking for a trustworthy Flutter developer
- Someone who needs long-term support and improvements
Message me befor
Get to know Karim Belkacem
Karim Belkacem
Seasoned Python developer and mobile app specialist with over 10 years
Level 1
- FromGermany
- Member sinceSep 2022
- Avg. response time1 hour
- Last delivery1 month
Languages
English, German, French
✅ 10+ years of experience in Python development – designing, building, and scaling reliable applications across different industries.
📱 Mobile app developer (iOS & Android) – specialized in Flutter and native integrations, delivering smooth, user-friendly apps.
☁️ Expert in Google Cloud Platform & Firebase – end-to-end app infrastructure, including authentication, real-time databases, cloud functions, analytics, and scalable deployments.
🐍 Bulletproof Python code – clean, maintainable, and optimized for performance, with a strong focus on testing, automation, and long-term reliability.
My Portfolio
FAQ
What do I need to get started?
Please provide a clear description of your app idea, any reference designs (if available), feature list. Wireframes or sketches are also helpful but not required.
Will my app work on both Android and iOS?
Yes! I use Flutter to build cross-platform apps that work seamlessly on both Android and iOS devices using a single codebase.
Do you provide ongoing support or maintenance?
Yes, I offer ongoing support and maintenance after delivery for an additional fee. You can also include a support period in a custom offer.
Will the app have a backend or database?
Yes, if needed. I can integrate Firebase, REST APIs, or other backend services. We’ll define your backend needs during our initial discussion.
What if I don’t have a detailed idea yet?
No problem! I can help you shape your idea, define core features, and guide you toward a solid MVP (Minimum Viable Product).
Can you convert my existing app into Flutter?
Definitely! I can help you migrate your existing native Android or iOS app into Flutter for easier maintenance and cross-platform support.
Reviews
6 reviews for this Gig
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Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
Most relevant
G guentherpag
Austria
great to work with him!! Delivered very fast and a requested change was immediately done!
$400-$600
Price
8 days
Duration
Helpful?M mrichterr
Germany
Alles Top wie schon zuvor. Sehr professionelle Arbeit. Sehr gerne wieder.
Up to $50
Price
2 days
Duration
Helpful?J juliaklii
Germany
Belkacem delivered the project ahead of schedule. All required files were provided, well-structured, and clearly documented. Communication was smooth and professional throughout the process. His technical skills and attention to detail were evident in the final result. I’m satisfied with the collaboration...
$50-$100
Price
4 days
Duration
Helpful?M mrichterr
Germany
Belkacem demonstrated an outstanding understanding of coding and exceeded all expectations. Not only did he deliver the project ahead of schedule, but he also provided all the required files, clearly structured and well-documented. Communication was smooth throughout, and he was always responsive and...
$50-$100
Price
3 days
Duration
Helpful?K karlg_g
Germany
Die Lieferung war schneller als erwartet, es war alles wunderbar. Die Expertise ist eindeutig zu erkennen, da macht eine Zusammenarbeit spaß. Gerne wieder
Up to $50
Price
2 days
Duration
Helpful?
Reviews
6 reviews for this Gig
| (6) | ||
| (0) | ||
| (0) | ||
| (0) | ||
| (0) |
Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
Most relevant
G guentherpag
Austria
great to work with him!! Delivered very fast and a requested change was immediately done!
$400-$600
Price
8 days
Duration
Helpful?M mrichterr
Germany
Alles Top wie schon zuvor. Sehr professionelle Arbeit. Sehr gerne wieder.
Up to $50
Price
2 days
Duration
Helpful?J juliaklii
Germany
Belkacem delivered the project ahead of schedule. All required files were provided, well-structured, and clearly documented. Communication was smooth and professional throughout the process. His technical skills and attention to detail were evident in the final result. I’m satisfied with the collaboration...
$50-$100
Price
4 days
Duration
Helpful?M mrichterr
Germany
Belkacem demonstrated an outstanding understanding of coding and exceeded all expectations. Not only did he deliver the project ahead of schedule, but he also provided all the required files, clearly structured and well-documented. Communication was smooth throughout, and he was always responsive and...
$50-$100
Price
3 days
Duration
Helpful?K karlg_g
Germany
Die Lieferung war schneller als erwartet, es war alles wunderbar. Die Expertise ist eindeutig zu erkennen, da macht eine Zusammenarbeit spaß. Gerne wieder
Up to $50
Price
2 days
Duration
Helpful?
