Browse categories
Explore
Fiverr Pro
English
$
USD
I will develop realtime chat voice and video calling for web and mobile apps
Nasir K
Level 2
5.0
5.0
Vetted by Fiverr Pro
Nasir K was selected by the Fiverr Pro team for their expertise.
About this gig
Looking for an enterprise-grade, scalable real-time communication platform like Micros'oft Teams, Slac'k, Zoom?
I am a vetted Fiverr Pro with 8+ years of expertise in building secure, production-ready communication systems. I specialize in cross-platform mobile apps using Flutter and React Native, backed by high-performance ASP.NET Core APIs or Node.js
CORE FEATURES
- Real-Time Messaging: 1-to-1 & Group Chat
- HD Audio & Video Calling via WebRTC, low-latency updates
- Team Collaboration: Screen sharing, meeting recording
- Advanced Tools: Calendar integration, push notifications, & file sharing
- Security: Role-based access control & secure data architecture
TECH STACK Mobile:
- Flutter | React Native
- Backend: ASP.NET Core | REST APIs | Node.js
- Real-Time Pipeline: SignalR | WebRTC | Web Sockets
- Databases: SQL Server | PostgreSQL
- Cloud Infrastructure: AWS | Azure | Redis
WHY PARTNER WITH ME?
- Vetted Pro Status: Proven enterprise-level architecture and clean, maintainable code.
- Scalability First: Apps built to handle thousands of concurrent streaming connections
Let's build your vision. Message me to discuss your requirements.
Note: Pricing and timelines are customized based on scope.
Get to know Nasir K
Nasir K
Senior Full Stack Web Developer I Mobile App Developer I AI Engineer
Level 2
Nasir K is part of the Fiverr Pro catalog and has been hand-picked by a dedicated Fiverr Pro team for their skills and expertise.
Vetted for
Software Development
- FromPakistan
- Member sinceFeb 2018
- Avg. response time1 hour
- Last delivery1 day
Languages
French, English, Urdu, Italian, German
⭐️ Vetted Pro selected by Fiverr Pro Team - Top 1% of talent on Fiverr
🚀 Senior Full Stack Developer | 10+ Years of Experience
✅ 32+ Large-Scale Projects Delivered
🎓 Bachelor's in Software Engineering
I’m a Full Stack Software Engineer with 10+ years of experience delivering high-quality, scalable solutions
✅ ASP.NET Core, MVC, C#
✅ Microservices, Clean Architecture, Mediator
✅ SQL Server, MySQL, MongoDB, PostgreSQL
✅ Entity Framework, JWT
✅ Web APIs
✅ Twilio, WebRTC, SignalR
✅ React, Angular, Blazor, Next.js
✅ GIT, TFS, CI/CD Pipelines
✅ Azure, AWS
📩 Let’s Discuss Your Project!
My Portfolio
FAQ
Which third-party services do you use for voice and video calling?
I integrate industry-standard, reliable SDKs such as WebRTC, Agora.io, Twilio, or Firebase RTC, depending on your budget and scaling requirements. I will guide you in choosing the most cost-effective provider for your specific user base.
Will the app support both Android and iOS seamlessly?
Yes, absolutely. By leveraging Flutter or React Native, I build a single, high-performance codebase that delivers native look, feel, and performance on both iOS and Android platforms simultaneously.
Can you build a custom backend instead of using Firebase?
Yes! For enterprise clients who require full data ownership, I specialize in building robust, custom REST APIs and real-time communication pipelines using ASP.NET Core or Node.js, backed by SQL Server, PostgreSQL, and SignalR for ultra-low latency.
How do you ensure the security of chat messages and calls?
Security is a top priority. I implement secure token-based authentication (JWT), secure WebSocket connections, role-based access controls, and data encryption practices to ensure all conversations and media streams remain completely private and secure.
Do I need to buy my own server/developer accounts?
Yes, you will need to provide your own Google Play and Apple Developer accounts for app submission, as well as credentials for your cloud hosting (AWS/Azure) or a third-party service. I will assist you through the setup process completely.
Reviews
1 reviews for this Gig
| (1) | ||
| (0) | ||
| (0) | ||
| (0) | ||
| (0) |
Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
Most relevant
M 
medcour
Repeat Client
Germany
Nasir delivered an outstanding result. The final product was completely free of bugs and worked exactly as expected. In fact, it even exceeded my initial expectations in terms of quality and attention to detail. Communication was smooth throughout the entire process, and Nasir demonstrated strong language...
$600-$800
Price
11 days
Duration
N Seller's Response
Helpful?
Reviews
1 reviews for this Gig
| (1) | ||
| (0) | ||
| (0) | ||
| (0) | ||
| (0) |
Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
Most relevant
M medcour
Repeat Client
Germany
Nasir delivered an outstanding result. The final product was completely free of bugs and worked exactly as expected. In fact, it even exceeded my initial expectations in terms of quality and attention to detail. Communication was smooth throughout the entire process, and Nasir demonstrated strong language...
$600-$800
Price
11 days
Duration
N Seller's Response
Helpful?
