I will develop asp net core web api, backend and rest api integration

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Zahid Mustafa

Level 2

5.0
5.0

Gig Summary

About this gig

Need a .NET backend that holds up in production?


I build ASP.NET Core Web APIs, integrate payment gateways and third-party APIs, and fix backend problems other developers left behind. 13+ years, 36 five-star reviews, zero cancellations.


WHAT I BUILD


- REST APIs in ASP.NET Core (.NET 6/7/8/9) - clean architecture, JWT auth, Swagger docs

- Third-party integration - payment gateways, SOAP/XML, webhooks, CRM and verification APIs

- Entity Framework Core - data modelling, migrations, query and performance fixes

- SQL Server - schema design, stored procedures, slow-query tuning

- Azure - App Service, Database, CI/CD, custom domains and SSL

- Legacy rescue - MVC, WebForms and .NET Framework upgrades to .NET Core


RECENT WORK


Payment gateway integrations for Gulf and Iraqi processors, a South African screening platform wired into government registry SOAP services, WhatsApp OTP systems, and PDF reporting engines.


HOW I WORK


Scope confirmed in writing before I start. A progress update mid-project. Support after delivery. That is why I am still 5.0 after 70 orders.


Message me your requirement and I will tell you honestly if it is a fit and what it will cost, before you order.

Get to know Zahid Mustafa

Zahid Mustafa

Senior Dot NET Backend Engineer, APIs and Azure

5.0(68)

Level 2

  • FromPakistan
  • Member sinceAug 2015
  • Avg. response time1 hour
  • Last delivery2 weeks
  • Languages

    Urdu, English
200+ projects delivered over 13+ years across Fiverr, Upwork, Freelancer, direct clients and salaried roles, for companies in the UK, UAE, Saudi Arabia, South Africa and the US. I build ASP.NET Core APIs and web applications, integrate payment gateways and third-party APIs, and fix backend problems other developers left behind. Recent work: a multi-tenant background-screening platform, a 3PL fulfilment system, and a legacy ASP to .NET rewrite for a US public-safety client. Message me with your requirement first. I'll tell you honestly what it takes and quote a real scope before you order.

Other Software Development Services I Offer

Reviews

37 reviews for this Gig
5.0

(36)
(1)
(0)
(0)
(0)
Rating Breakdown
  • Seller communication level
    5
  • Quality of delivery
    5
  • Value of delivery
    4.9
Sort By
Most relevant
  • F

    fabrizioalia163

    CA

    Canada

    5

    Extremely good work and patient. Would highly recommend.

    $200-$400

    Price

    1 day

    Duration

    Helpful?
    Yes
    No
  • T

    thugdeluxe

    US

    United States

    Ongoing collaboration
    5

    Excellent developer.

    $400-$600

    Price

    1 day

    Duration

    Helpful?
    Yes
    No
  • T

    thugdeluxe

    US

    United States

    Ongoing collaboration
    5

    Trustworthy and professional. He is definitely my go-to guy.

    $200-$400

    Price

    1 day

    Duration

    Helpful?
    Yes
    No
  • T

    thugdeluxe

    US

    United States

    Ongoing collaboration
    5

    Zahid is the go-to developer for our website, surveyours.com.

    $100-$200

    Price

    2 days

    Duration

    Helpful?
    Yes
    No
  • R

    rebornman

    GB

    United Kingdom

    5

    I was asking for help with webhooks in an ASP.NET Core 10 project, not only did he resolve the issue, but he also helped me configure testing evironment for local host. Immediately - No complicated back and forth - A genuine expert.

    $50-$100

    Price

    1 day

    Duration

    Helpful?
    Yes
    No
Reviews

37 reviews for this Gig
5.0

(36)
(1)
(0)
(0)
(0)
Rating Breakdown
  • Seller communication level
    5
  • Quality of delivery
    5
  • Value of delivery
    4.9
Sort By
Most relevant
  • F

    fabrizioalia163

    CA

    Canada

    5

    Extremely good work and patient. Would highly recommend.

    $200-$400

    Price

    1 day

    Duration

    Helpful?
    Yes
    No
  • T

    thugdeluxe

    US

    United States

    Ongoing collaboration
    5

    Excellent developer.

    $400-$600

    Price

    1 day

    Duration

    Helpful?
    Yes
    No
  • T

    thugdeluxe

    US

    United States

    Ongoing collaboration
    5

    Trustworthy and professional. He is definitely my go-to guy.

    $200-$400

    Price

    1 day

    Duration

    Helpful?
    Yes
    No
  • T

    thugdeluxe

    US

    United States

    Ongoing collaboration
    5

    Zahid is the go-to developer for our website, surveyours.com.

    $100-$200

    Price

    2 days

    Duration

    Helpful?
    Yes
    No
  • R

    rebornman

    GB

    United Kingdom

    5

    I was asking for help with webhooks in an ASP.NET Core 10 project, not only did he resolve the issue, but he also helped me configure testing evironment for local host. Immediately - No complicated back and forth - A genuine expert.

    $50-$100

    Price

    1 day

    Duration

    Helpful?
    Yes
    No