I will fix bugs in your node js python or dotnet backend and API

C
congcuong6
C
congcuong6
Cong Cuong
5,0
5,0
Alcune informazioni sono riportate in lingua inglese.
fix bugs in your node js python or dotnet backend and API
Schermo intero
fix bugs in your node js python or dotnet backend and API

Informazioni su questo servizio

I debug and fix backend and API issues in Node.js, Python, and .NET/C#. You get the fix AND a plain English explanation of what actually went wrong.

WHAT I FIX

- APIs returning errors, wrong data, or nothing at all

- Authentication, JWT, session and CORS bugs

- Database issues: slow queries, deadlocks, failed migrations

- Broken integrations: payments, webhooks, OAuth, email

- "Works on my machine" deployment and environment bugs

- Memory leaks, timeouts, race conditions

STACK

Node.js (Express, NestJS), Python (FastAPI, Django, Flask), C#/.NET Core, SQL Server, PostgreSQL, MySQL, MongoDB, Docker

WHY ME

- 6+ years debugging real production systems under real pressure

- You get a root-cause explanation, not just a patched file


HOW IT WORKS

1. Message me the error, your stack, and repo access

2. I confirm I can fix it and quote you BEFORE you pay

3. You order, I fix, you get the fix plus prevention advice

  • Linguaggio di programmazione

    • ASP.NET

  • Expertise

    • Debug
    • Performance
    • Sicurezza
    • Database

  • Framework front end

    • Angular
    • Next.js
    • React.js
    • Tailwind CSS
    • Blazor

  • Framework back end

    • Django
    • FastAPI
    • NestJS
    • Next.js
    • Altro

Scopri di più su Cong Cuong

Cong Cuong

Full Stack Developer: DotNET, Nodejs, React, DevOps

5,0(1)
  • DaVietnam
  • Membro dagen 2024
  • Tempo di risposta medio6 ore
  • Ultima consegna1 anno

  • Lingue

    Vietnamita, Inglese
I'm a full-stack developer with 6+ years building production systems in healthcare, education and business management. I work across the whole stack — .NET, Python, Node.js, React, Angular, SQL Server, PostgreSQL — and handle everything from database design and architecture to deployment and monitoring. Whether you need a system built from scratch, a new feature, a bug fixed or a slow app made fast, I'll propose the approach that actually fits your needs.

Il mio portfolio

Recensioni

1 recensioni per questo servizio
5,0

(1)
(0)
(0)
(0)
(0)
Valutazione dettagliata
  • Livello di comunicazione del venditore
    5
  • Qualità della consegna
    5
  • Valore della consegna
    5
Ordina per
Più rilevante
  • R

    randy0116

    SG

    Singapore

    5

    Cong Cuong truly impressed with a flawless and well-documented delivery that showcased exceptional professionalism. Working with him was a breeze, given his quick responsiveness and excellent language fluency. He consistently went above and beyond, making the entire experience delightful! 🙌

    200 USD-400 USD

    Prezzo

    12 giorni

    Tempo

    Utile?
    Sì
    No
Recensioni

1 recensioni per questo servizio
5,0

(1)
(0)
(0)
(0)
(0)
Valutazione dettagliata
  • Livello di comunicazione del venditore
    5
  • Qualità della consegna
    5
  • Valore della consegna
    5
Ordina per
Più rilevante
  • R

    randy0116

    SG

    Singapore

    5

    Cong Cuong truly impressed with a flawless and well-documented delivery that showcased exceptional professionalism. Working with him was a breeze, given his quick responsiveness and excellent language fluency. He consistently went above and beyond, making the entire experience delightful! 🙌

    200 USD-400 USD

    Prezzo

    12 giorni

    Tempo

    Utile?
    Sì
    No

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