Book a Development & IT Consultation with Mersad H. | Upwork

Development & IT Consultation with Mersad H.

5.0 · 40 reviews

At Stage Coding, we offer expert consultation services across:

Mobile App Development → Flutter architecture, best practices, and performance optimisation.

Databases & Cloud → Firebase, AWS, PostgreSQL, MongoDB, and cloud architecture best practices

Web Development → React.js, Next.js, SSR/SSG strategies, state management, and SEO optimisation

Backend Engineering → Python, Java Spring Boot, microservices architecture, API design, and database modeling

Product Design → UX/UI strategy, Figma design systems, prototyping, and developer handoff best practices

AI & LLM Engineering → Prompt design, chatbot integration, content automation, and retrieval-augmented generation (RAG) systems

Architecture & Performance → Scalable system design, code reviews, and CI/CD pipeline implementation

API Development & Integration → REST, GraphQL, third-party integrations, and security best practices

We partner with our clients to help them build, launch, and scale high-quality, future-ready digital products with confidence.

Get personalized advice on:

AI Integration Ecommerce Development Mobile App Development Prompt Engineering Web Programming spring boot flutter next.js replit mvp

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About Mersad

Flutter Expert - Healthcare & Fitness Apps, Mobile & Web, SaaS, AWS

100% Job Success

5.0 (40 reviews)

Travnik, Bosnia and Herzegovina - 4:11 am local time

🎖️ Top Rated Plus - Top 1% Talent on UpWork

🚀 100+ mobile apps successfully published on the App Store & Google Play
🖥️ 10+ years of professional software development experience
📱 Expert in Flutter, Android, iOS, Full-Stack & AI-powered applications

I help startups and businesses turn ideas into scalable digital products - from MVPs to production-ready applications used by thousands of users.

Whether you're building a new product or improving an existing one, I can take ownership of the entire development process, including architecture, UI/UX collaboration, backend development, deployment, analytics, and long-term maintenance.

What I Build

Mobile Apps (Flutter, Android, iOS)
SaaS Platforms
CRM & Business Management Systems
AI-Powered Applications
Marketplace Platforms
Healthcare & Fitness Apps
Booking & Scheduling Systems
Social Networking Apps
Enterprise Business Solutions

- Mobile Development

Flutter (BLoC, Riverpod, Provider)
Dart
Native Android (Kotlin)
Native iOS (Swift)
Cross-platform architecture
Clean Architecture & MVVM
Performance optimization
Responsive UI
Offline-first applications
Push Notifications
In-App Purchases
Deep Linking
Google Maps
Camera, QR & NFC integrations
App Store & Google Play publishing

-Backend & Web

Java Spring Boot
Python
React
Next.js
REST APIs
PostgreSQL
MySQL
Firebase
Supabase
Docker
Cloud Architecture
Authentication & Authorization
Third-party API integrations

- Firebase Expertise

I have extensive experience building applications with Firebase, including:

Authentication
Firestore
Cloud Functions
Cloud Messaging (FCM)
Crashlytics
Analytics
Remote Config
Storage
Realtime Database

- AI Development

Modern products need more than just great code - they need intelligent features.

I build AI-powered solutions using:

OpenAI
Claude
Gemini
AI Chatbots
AI Assistants
Prompt Engineering
AI Automation
OCR
Speech-to-Text
Text-to-Speech
AI-powered content generation

- Analytics & Subscription Growth

I don't just develop apps - I help clients understand how users behave and how products generate revenue.

My experience includes:

RevenueCat
Mixpanel
AppsFlyer
Firebase Analytics

This allows you to understand:

Where your users come from
Which campaigns generate paying customers
Subscription conversion rates
Customer acquisition cost (CAC)
Return on ad spend (ROAS)
User retention and product performance

- What You Can Expect

✅ End-to-end product development
✅ Scalable architecture built for growth
✅ Clean, maintainable, production-ready code
✅ Fast delivery using AI-assisted development workflows
✅ Clear communication and proactive problem solving
✅ Long-term technical partnership—not just another freelancer

Over the past decade, I've worked with startups, growing businesses, and established companies, helping them launch products, improve existing platforms, and scale engineering teams.

If you're looking for a developer who understands both the technical and business side of building successful software, I'd be happy to discuss your project.

What to expect

Schedule the consultation

Choose from the freelancer’s available days and times.

Get advice for your custom needs

Share details about your project and what you want to talk about. The freelancer will review and reach out if they have questions.

Join the Zoom meeting

1-on-1 meeting with the freelancer to discuss your needs and project.

Approve the work

The freelancer will finish up the documents you asked for and send them to you for approval:

Before the consultation

Here’s what Mersad will need to know before you meet

Tell me about yourself and what you want to talk about

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Very great. Task accomplished... extra work brought in to ensure correct. Very good. Great dev.... let's go