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Check out a sample of the 2,133 Web Application Development jobs posted on Upwork

Full Stack Web Developer Fixed-price ‐ Posted 2 days ago

$155
Fixed-price

Intermediate
Experience level

Job Title: Freelance Web Developer for Real Estate Platform Job Description: We are seeking an experienced and creative Freelance Web…

Web Application Development API Integration API HTML CSS Web Development JavaScript Google Analytics Adobe Photoshop Website Redesign
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React (Vite) Expert Hourly ‐ Posted 2 days ago

Less than 30 hrs/week
Hours needed

1 to 3 months
Duration

Expert
Experience level

I'm on the lookout for a React developer with a strong expertise in using Vite. My project is a web application that's nearing complet…

Web Application Development Progressive Web App React
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Web Developer (AssemblyAI) Hourly ‐ Posted 2 days ago

Less than 30 hrs/week
Hours needed

1 to 3 months
Duration

Expert
Experience level

Web Developer (AssemblyAI) We are recruiting a web designer to implement an AssemblyAI based e-commerce product. The desirable candid…

Web Application Development API HTML5 JavaScript PHP CSS HTML Web Development
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$300
Fixed-price

Intermediate
Experience level

I need a Custom Map Navigation Widget designed for a Flutter Flow project. The widget will be used in a delivery app to help navigate a…

Web Application Development Google APIs Android App Development iOS Development Flutter Dart
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Looking forward to build a openAI based web app. Fixed-price ‐ Posted 2 days ago

$100
Fixed-price

Intermediate
Experience level

Hi, I built a wordpress plugin that uses openAI api. Now I’d like to make it as a webapp so that anyone even outside the wordpress en…

Web Application Development JavaScript Python Payment Gateway Integration AI Model Integration
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Hours to be determined
Hours needed

1 to 3 months
Duration

Expert
Experience level

We are seeking a talented Full Stack Developer who is proficient in using React/Remix or Cue/Nuxt for server-side rendering (SSR). The…

Web Application Development CSS Node.js JavaScript React
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Cloud based USA payroll Fixed-price ‐ Posted 2 days ago

$1,500
Fixed-price

Intermediate
Experience level

Seeking a USA payroll program that is cloud-based. We would need an API integration with our admin that automatically calculates hours…

Web Application Development Payroll Accounting
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$5
Fixed-price

Intermediate
Experience level

Project Description: We are looking for a skilled developer to create a web application with the following functionalities: 1. Simple…

Web Application Development Python CSS HTML
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Full Stack NextJS / React Developer Hourly ‐ Posted 2 days ago

30+ hrs/week
Hours needed

1 to 3 months
Duration

Intermediate
Experience level

Hi, I'm looking for a strong full stack developer to assist me with an early stage start-up. You will be actively working in a agile m…

Web Application Development NestJS React Web Development MySQL Next.js
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User Tracking Mechanism Hourly ‐ Posted 2 days ago

Less than 30 hrs/week
Hours needed

1 to 3 months
Duration

Intermediate
Experience level

We are looking for a skilled web developer to create a clone of Microsoft Clarity for our custom needs. The ideal candidate will have e…

Web Application Development JavaScript Python PHP Web Development Java MongoDB
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Web Application Developers on Upwork
can earn $20–$30/hr.
Learn more below about how you can earn a career on the world’s work marketplace.
Web Application Developer average prices bell curve

$20 $30

Median hourly rates (USD)

How To Become a Web Application Developer

Do you have a passion for creating exciting new web applications? Do you enjoy challenging yourself to build new tools from scratch and turn client ideas into reality? If so, you may have what it takes to become a freelance web application developer on Upwork.

What does a web application developer do?

A web application developer is someone who develops websites and web apps for desktop, tablet, and mobile devices. A web application developer uses a variety of programming languages such as HTML, CSS, and JavaScript, in addition to frameworks such as React and Vue, to create and support web applications. The developer may also use a plethora of third-party tools and services to create the application. It is part of a web developer's responsibility to ensure that the application is accessible to users around the world.

Web application developers may also be expected to handle the maintenance and hosting infrastructure of a web app. This will include configuring DNS options for connecting domain names and subdomains, setting up proper MX rules for email support, and performing maintenance work when necessary, such as updating plugins and other dependencies in software.

What skills do I need to become a web application developer?

A web application developer may work with many programming languages and frameworks. HTML, CSS, and JavaScript form the core programming languages that every web application developer should know, but these skills may be augmented with a variety of additional programming languages such as Python, C#, and PHP.

Web application developers must also be familiar with a variety of popular frameworks and software libraries relevant to their area of expertise. These will often include the use of Node.js and popular JavaScript frameworks such as React, Vue, and Express.js. Web application developers must be comfortable working with the command line in order to install and update project dependencies.

Web application developers may also be responsible for handling the front end of the app. This relates to the user interface and user experience, such as how the app looks and feels to the end user. Web developers may be tasked with integrating layouts provided by designers and making sure apps have a consistent end-user experience on different devices, from desktop computers to smartphones.

Common skills a web application developer should possess include:

  • Bachelor’s degree in computer science, computer engineering, or related field
  • Proficiency with required web development coding languages such as HTML5, CSS, Ruby, JavaScript, and Bootstrap
  • Strong understanding of asynchronous request handling, partial page updates, and Ajax 5.
  • Experience with at least one server-side language, such as PHP, Java, or .NET
  • Proficiency with relational databases, such as MySQL and SQL
  • Experience with using caching, routing, and queueing software
  • Ability to work well with management, front-end developers, back-end developers, and other programmers

What are the core web application developer job responsibilities?

A web application developer will be expected to build and create web applications from scratch as well as work on the maintenance of existing web apps. This may include the design and implementation of RESTful services in order to provide API endpoints to web app data or to integrate third-party data sources for consumption by internal APIs. Building from scratch will also involve the design and implementation of relational database schemas or NoSQL data stores for data storage purposes. Knowledge of popular third-party cloud-based storage and hosting services such as Amazon Web Services or Google Cloud is not necessary but may be useful.

Web application developers are required to gather and define project requirements from clients and convert these into a functioning web application. This will include defining the scope, creating the software architecture, writing and testing the software, and optimizing it for speed and performance. Web developers with experience and background knowledge should be able to understand when existing tools and services can be used to meet client requirements and when completely bespoke code is required, knowledge that helps save both time and money for the client.

Web application developers will often have to integrate third-party tools and services into existing applications. Common use cases involve integrating data analysis software or ad network services. This will involve becoming familiar with the provided tools and understanding how to integrate them into the web application.

Jump-start your freelance web application developer career on Upwork and start looking for your first job. Eager to learn more about web application developer jobs on Upwork? Check out these additional resources:

Upwork is not affiliated with and does not sponsor or endorse any of the tools or services discussed in this section. These tools and services are provided only as potential options, and each reader and company should take the time needed to adequately analyse and determine the tools or services that would best fit their specific needs and situation.

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