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Check out a sample of the 1,833 Back-End Developers jobs posted on Upwork

30+ hrs/week
Hours needed

1 to 3 months
Duration

Expert
Experience level

Hi, We have project that uses .Net Core Micro services Architecture using Ocelot Gate way and Consul Service Discovery, We have already…

Back-End Development RESTful API API Integration .NET Core API Microservice
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Less than 30 hrs/week
Hours needed

Less than 1 month
Duration

Expert
Experience level

Senior Firebase Realtime Database Specialist with Google Cloud & App Store Connect Experience Project Overview: We are looking for an…

Back-End Development iOS Development Node.js iOS Firebase Realm Database API
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$150
Fixed-price

Expert
Experience level

I am looking for somebody with hands-on experience in SOAP WSS to help me troubleshoot (or reimplement) a mock SOAP WSS client and serv…

Back-End Development Python
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Python expert Fixed-price ‐ Posted 1 day ago

$20
Fixed-price

Intermediate
Experience level

Need a python expert good at website development(backend)

Back-End Development Python API Integration
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$50
Fixed-price

Expert
Experience level

We are looking for an experienced eBay API/Search Expert to provide consulting on optimizing search result timings. Scope: This is a q…

Back-End Development eBay API
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B2C travel website Hourly ‐ Posted 1 day ago

Less than 30 hrs/week
Hours needed

1 to 3 months
Duration

Intermediate
Experience level

Hello Freelancer, I am looking to build a B2C travel website. The first release version will focus on hotels. In short, we need to int…

Back-End Development API Integration RESTful API Golang C# Python Ruby PHP Java
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$100
Fixed-price

Intermediate
Experience level

Kindly bid with your previous experience with weweb.io and xano backend. I'll share my scope of work after profile review

Back-End Development Web Development PHP
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Backend Web3 Developer Hourly ‐ Posted 1 day ago

Less than 30 hrs/week
Hours needed

1 to 3 months
Duration

Intermediate
Experience level

Introduction: We are seeking a highly skilled and experienced Backend Web3 Developer to join our dynamic team. This is an exciting oppo…

Back-End Development HTML HTTP Automated Deployment Pipeline CSS 3 Angular CSS AngularJS JavaScript
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Less than 30 hrs/week
Hours needed

1 to 3 months
Duration

Intermediate
Experience level

I am looking for an experienced developer to create an automated bot that integrates ServiceTitan and Google Chat. The bot will retriev…

Back-End Development Web Development Google APIs API Integration API
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30+ hrs/week
Hours needed

3 to 6 months
Duration

Intermediate
Experience level

Job Description: We are looking for an experienced ASP.NET Developer with at least 5 years of expertise in Oracle databases and strong…

Back-End Development Database Architecture Database Design Oracle Database ASP.NET ASP.NET MVC .NET Framework
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