Sfoglia categorie
Esplora
Fiverr Pro
Italiano
$
USD
I will add features and fix bugs in your existing web application
Hanif
5,0
5,0
Informazioni su questo servizio
Is your existing web application slow, crashing, or drowning in technical debt? Do you need a new feature added quickly by a professional?
I am a Senior Full-Stack Developer specializing in rescuing, scaling, and optimizing existing codebases. I help businesses fix their technical debt and add powerful new features to their .NET (C#) and Node.js platforms. I understand that taking over existing code is difficultI ensure I don't break your existing features while making updates.
What I Can Do For You:
- Bug Fixing: Identify and resolve critical backend and frontend errors.
- Performance Optimization: Speed up slow SQL queries and optimize API load times.
- Feature Expansion: Add new modules, dashboards, or payment gateways.
- Structural Refactoring: Clean up messy legacy code to make your app scalable.
- API Integration: Connect your app to third-party services safely.
My Tech Stack Expertise:
- ASP.NET, .NET Core, Node.js, C# (CSharp), Python, F# (FSharp), JavaScript, SQL Server, Entity Framework, PostgreSQL
Please message me BEFORE ordering so I can review your existing codebase and give you an accurate quote based on the size of the task!
Scopri di più su Hanif
Hanif
Software Engineer : FSharp, CSharp, Dot NET
- DaBangladesh
- Membro dafeb 2019
- Ultima consegna6 mesi
Lingue
Bengali, Inglese
Senior Software Engineer with 5+ years of experience at a YC startup in Bangladesh, where I built scalable operational, logistics, and marketing platforms. I specialize in full-stack development, AI integration, and system optimization. I’ve mentored junior engineers and led cross-functional projects that drive business efficiency.
I’m passionate about clean architecture, performance tuning, and delivering results that exceed expectations.
Il mio portfolio
Altri servizi della categoria Sviluppo di software offerti da me
FAQ
Do you need access to my server or code repository?
Yes, I will need access to your GitHub/GitLab repository and potentially your staging server environment to properly test and fix the issues without affecting your live users.
What if you can't fix the bug?
Before you place an order, I will review your codebase to ensure the fix is possible within the scope. If it requires a complete rewrite instead of a simple fix, I will inform you immediately so we can adjust the plan.
Do you work on old or legacy .NET code?
Yes, I have experience refactoring older ASP.NET applications into modern standards and migrating them to .NET Core.
Can you create documentation for the code you fix?
Yes! For my Standard and Premium packages, I include detailed inline code comments and fix documentation so your future developers understand exactly what was changed.
Will my website go down while you are fixing it?
No, I will work entirely on a local development branch or a secure staging environment. Nothing is pushed to your live production server until you thoroughly review and approve the changes.
Recensioni
5 recensioni per questo servizio
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Valutazione dettagliata
- Livello di comunicazione del venditore
- Qualità della consegna
- Valore della consegna
Ordina per
Più rilevante
F fatiha56
Ungheria
Hanif's work in Software Development was nothing short of PROFESSIONAL. The project was completed efficiently and delivered on time, making the entire collaboration a pleasure. HIGHLY recommend! 👏
100 USD-200 USD
$
3 settimane
Tempo
Utile?B budoya
Australia
Collaborazione in corsoGreat work. Thanks
100 USD-200 USD
$
5 giorni
Tempo
Utile?G giannisblock
Canada
Collaborazione in corsokgkkjhjjkgghgk
50 USD-100 USD
$
1 giorno
Tempo
Utile?G giannisblock
Canada
Collaborazione in corsoReally good help
100 USD-200 USD
$
1 giorno
Tempo
Utile?C carlosthecan
Stati Uniti
Collaborazione in corsoHanif is making some minor updates to the recent project, but the task was done expertly and completed very quickly. I am always happy with the work Hanif does!
50 USD-100 USD
$
Utile?
Recensioni
5 recensioni per questo servizio
| (5) | ||
| (0) | ||
| (0) | ||
| (0) | ||
| (0) |
Valutazione dettagliata
- Livello di comunicazione del venditore
- Qualità della consegna
- Valore della consegna
Ordina per
Più rilevante
F fatiha56
Ungheria
Hanif's work in Software Development was nothing short of PROFESSIONAL. The project was completed efficiently and delivered on time, making the entire collaboration a pleasure. HIGHLY recommend! 👏
100 USD-200 USD
$
3 settimane
Tempo
Utile?B budoya
Australia
Collaborazione in corsoGreat work. Thanks
100 USD-200 USD
$
5 giorni
Tempo
Utile?G giannisblock
Canada
Collaborazione in corsokgkkjhjjkgghgk
50 USD-100 USD
$
1 giorno
Tempo
Utile?G giannisblock
Canada
Collaborazione in corsoReally good help
100 USD-200 USD
$
1 giorno
Tempo
Utile?C carlosthecan
Stati Uniti
Collaborazione in corsoHanif is making some minor updates to the recent project, but the task was done expertly and completed very quickly. I am always happy with the work Hanif does!
50 USD-100 USD
$
Utile?
