status: available for projects

Helping Startups & Businesses Build High-Performance Mobile Apps,

Custom CRM, VoIP Sip Ip Calling & Business Software from Idea to Deployment.

I help startups and businesses build custom mobile apps, web applications, CRM, VoIP, and real-time solutions with clean code, modern design, and reliable performance.

See the work first
3+
years experience
15+
apps in production
500+
active users
Sk Nayeem Ur Rahman
developer.dart 

        


        

          

          

            

              9:41
              ● live
            

            
Field CRM

            
Today's overview

            

              
128
visits

              
94%
synced

            

            

              

              

            

          

        

      

    


  










    

        

            
About

            
Who's building this

            

        


        

            

                

                    

                    Sk Nayeem Ur Rahman
                


                

                    

                        I'm Sk Nayeem Ur Rahman, a Flutter developer who builds more than just beautiful UI. I create production-ready applications that solve real business problems.
                    

                    

                        With a deep focus on clean architecture and seamless integration, I bridge the gap between complex back-end systems (SIP, WebRTC, Laravel) and polished, high-performance mobile experiences.
                    

                


                

                    
                         Upwork
                        
                    
                    
                         LinkedIn
                        
                    
                    
                         GitHub
                        
                    
                

            


            

                

                    

                        ⚡
                        
core_strengths

                        pubspec.yaml
                    


                    

                        

                            

                                Flutter / Dart
                                95%
                            

                            

                                

                            

                        

                        

                            

                                Firebase / REST APIs
                                90%
                            

                            

                                

                            

                        

                        

                            

                                Bloc / GetX
                                88%
                            

                            

                                

                            

                        

                        

                            

                                UI/UX Implementation
                                85%
                            

                            

                                

                            

                        

                        

                            

                                SQLite / Local Storage
                                82%
                            

                            

                                

                            

                        

                    


                    


                    

                        

                            
6+

                            
Production Apps

                        

                        

                            
3+

                            
Years Experience

                        

                        

                            
500+

                            
CRM Users

                        

                    


                    

                        
                            Let's Build Something Amazing
                            
                        
                        
Production-ready applications with real business value

                    

                

            

        

    










  

    
 Experience

    
work-history


    

      

        
        

          a3f9c2e
          2022 — present · Dhaka, BD
        

        
Flutter Developer @ iHelpBD Software

        

          Led end-to-end Flutter development on 15+ production apps: CRM used by 500+ field agents, real-time social platforms, doctor-appointment apps, e-commerce, farm management, and more. Worked directly with designers and backend teams to ship on schedule.
        

        

          flutter
          firebase
          bloc/getx
          rest_api
          sqlite
        

      


      

        
        

          2021 · 3 months · Dhaka, BD
        

        
Android Developer Intern @ Next Tech BD

        

          Hands-on Flutter and Android work during an intensive internship — contributed to CRM modules and team-collaboration tools, and picked up real production Git workflows.
        

        

          flutter
          android
          git
        

      

    

  










  

    
Projects

    
Shipped, not just designed

    
Production apps built at iHelpBD — real users, real constraints. Full code available on request under NDA.


    

      
      

        

        
CRM Application

        
build: shipped · 500+ field agents

        

          
problem
Field agents logged visits on paper, so reports reached the office a day late.

          
built
Offline-first Flutter app with background sync, live dashboards, and team reporting.

          
result
500+ agents log visits in real time — no more end-of-day paperwork backlog.

        

        

          flutterfirebasebloc
        

        ask about this build →
      


      
      

        

        
iSocial Platform

        
build: shipped · real-time messaging

        

          
problem
Needed a community app where messages, stories, and media feel instant, not laggy.

          
built
Socket.IO messaging, media sharing, stories and groups on a performance-first architecture.

          
result
Messages and media sync in real time with no visible lag under normal load.

        

        

          fluttersocket.iocloud_storage
        

        ask about this build →
      


      
      

        

        
Doctor Appointment

        
build: shipped · –60% booking time

        

          
problem
Patients booked appointments over the phone, tying up staff and causing double-bookings.

          
built
Live doctor availability, self-service slot booking, reminders, secure patient-doctor messaging.

          
result
Booking time cut by roughly 60%, with far fewer scheduling conflicts.

        

        

          flutterfirebasegetx
        

        ask about this build →
      


      
      

        

        
E-Commerce App

        
build: shipped · payments integrated

        

          
problem
Client needed a mobile storefront that could take payments end-to-end, not just show a catalog.

          
built
Product catalog, cart, secure payment gateway, order tracking, personalized recommendations.

          
result
Customers browse, pay, and track orders fully in-app with no external redirect.

        

        

          flutterpaymentsfirebase
        

        ask about this build →
      


      
      

        

        
Task Management

        
build: shipped · team collaboration

        

          
problem
Team lost track of deadlines across scattered spreadsheets and chat threads.

          
built
Project boards, deadline tracking, progress visualization, offline-first with SQLite.

          
result
One shared source of truth for tasks — works fully offline in low-signal areas.

        

        

          fluttersqlitegetx
        

        ask about this build →
      


      
      

        

        
Agro Farm Management

        
build: shipped · 50+ farms tracked

        

          
problem
Farm records were kept on paper, and rural areas often have no reliable internet.

          
built
Crop, livestock, expense, and inventory tracking designed to work fully offline.

          
result
50+ farms now track records digitally, syncing automatically once back online.

        

        

          fluttersqlitecharts
        

        ask about this build →
      

    

  










  

    
My Work

    
Production Apps

    
Every app was built for real businesses with real users — not just demos.


    
    

      
      
      
      
      
      
      
      
      
    


    

      
    


    

      
shipped apps · available for your next project

    

  










  

    
Services & Pricing

    
What it typically costs

    
Every project is scoped after a short call — these are starting ranges, not final quotes, so you know roughly where you'll land before we talk.


    

      

        
Feature / Integration

        
Add a specific feature to an existing app

        
from $300

        
fixed price · 1–2 weeks

        
    
          
  • Firebase/REST API integration
    • 
          
  • Payment gateway integration
    • 
          
  • Single feature build & test
    • 
        

        Ask about this →
      


      

        most common
        
Custom App / CRM

        
A full app built from your requirements

        
from $800

        
fixed milestones · 3–6 weeks

        
    
          
  • Full Flutter app (Android + iOS)
    • 
          
  • Firebase or Laravel API backend
    • 
          
  • Weekly progress updates
    • 
          
  • 2 weeks of post-launch support
    • 
        

        Ask about this →
      


      

        
Ongoing / Retainer

        
Continued development & maintenance

        
from $20/hr

        
monthly retainer · ongoing

        
    
          
  • Bug fixes & OS/SDK updates
    • 
          
  • New features on a rolling basis
    • 
          
  • Priority response time
    • 
        

        Ask about this →
      

    

  










  

    
 Skills

    
Dependencies I ship with


    

      

        

        
Mobile Development

        
Cross-platform iOS & Android with Flutter — clean widget trees, smooth animation, responsive layout.

        

        
flutter: ^3.9 — 95%

      

      

        

        
Backend Integration

        
Firebase (Auth, Firestore, Storage, FCM), REST APIs, real-time sync and push notifications.

        

        
firebase: ^3.0 — 90%

      

      

        

        
State Management

        
BLoC for large-scale apps, GetX for speed. MVVM structure kept maintainable as apps grow.

        

        
flutter_bloc: ^8.1 — 88%

      

      

        

        
UI/UX Implementation

        
Pixel-close from Figma. Custom animation, responsive layout, accessibility considered from the start.

        

        
figma_to_flutter — 85%

      

      

        

        
Version Control

        
Branching strategies, pull requests, code review — comfortable in collaborative team repos.

        

        
git: ^2.4 — 92%

      

      

        

        
Local Storage

        
Offline-first with SQLite, Hive and SharedPreferences — persistence, caching, sync strategy.

        

        
sqflite: ^2.3 — 82%

      

    

  










  

    
Why work with me

    
No client quotes yet — here's what you can verify instead

    
I'd rather point you to something you can check yourself than put words in a client's mouth. As reviews come in on Upwork, they'll show up here — unedited, with a link to the source.


    

      

        

        

          
Verified Upwork profile

          
ID-verified freelancer with a public work history you can check directly — no cherry-picked screenshots.

          view profile →
        

      

      

        

        

          
Open GitHub activity

          
Public commit history and repos — see how I actually structure and write code, not just the finished screenshots.

          view github →
        

      

      

        

        

          
24-hour reply, always

          
Every message gets a reply within a day, even if it's just "still scoping this, more tomorrow" — no silent weeks.

        

      

      

        

        

          
Scope in writing before we start

          
Fixed milestones and deliverables agreed before any code is written — no vague "we'll figure it out as we go."

        

      

    

  










  

    
Contact

    
Tell me about the project

    
WhatsApp is the fastest way to reach me — I reply within 24 hours.


    

      

        

        
or reach me via —


        
          

          
email
nayeemdeveloperbd@gmail.com

        
        
          

          
upwork
View profile & reviews →

        
        
          

          
linkedin
Connect on LinkedIn →

        
      


      

        
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