Phoenix Developers Hiring Guide

A fast and reliable web development framework based on Elixir

Phoenix is a reliable and fast web development framework based on Elixir. Phoenix applications can handle a large number of users simultaneously and offer amazing performance. It works on Model-View-Controller (MVC) framework and allows you to create web applications, low-latency distributed systems, and APIs.

Phoenix utilizes Erlang BEAM for scalability and stability. Furthermore, Phoenix processes are lightweight, which means the system can run a lot of them without overloading memory and CPU. The end-products are thus extremely reliable and can manage high traffic conditions. 

Phoenix applies features such as pattern matching and offers functional programming capabilities to improve developer productivity. Its pipeline operators also allow data movement from one function to another without loss, allowing developers to focus on business logic without worrying about the boilerplate code.

Phoenix Developers Hiring Guide 10
  • Phoenix Developers Hiring Guide 11

    Hiring Guide

  • Phoenix Developers Hiring Guide 12

    Interview Questions

  • Phoenix Developers Hiring Guide 13

    Job Description

Phoenix has several components that help in web application development. Its controllers' actions gather all the required data and prepare it before invoking the view layer. 

The view layer either provides a template for the data or redirects it. It renders templates/responses sent by the browser and compiles them into functions. Templates are files that contain contents included in the responses for a web application’s would-be HTML documents.

The Router forwards HTTP requests to controllers. It manages channels and performs pipeline transformations onto the files for routing. Routing transformation is done through path helpers that create different route paths for different applications.  

Phoenix uses channels i.e., layered communication systems, for sending and receiving messages. They are also used for real-time communication. 

Phoenix In Today's Market

Phoenix was created in 2014 by Chris McCord and is one of the fastest frameworks worldwide. Many organizations like Heroic Labs, PODIUM, Bleacher Report, and Brightcove use it for their web applications.  

Unlike other frameworks, Phoenix doesn’t have a performance productivity tradeoff making it very useful for modern web technologies. It’s very efficient for building real-time apps as it contains built-in components like channels that can manage multiple real-time client experiences.

It also uses Presence and WebSockets for interacting with servers. You can use  Phoenix channels to create chat rooms, tracking software, and sensors for IoT projects, among other things. 

Issues In Finding A Phoenix Developer

Since Phoenix is based on Elixir and Elixir itself is based on Erlang,  any engineer who works on Phoenix should be skilled in both. But there are very few engineers who are proficient in them. Thus, even though these languages are highly useful for projects that demand concurrency and process trees, they come with their fair share of complications.

Organizations may have it hard to find Phoenix developers with enough experience and problem-solving skills to translate into industry-level projects. Unfortunately, the online community for Phoenix is also very small, which means there are limited resources for novice developers.

What’s more, Phoenix and Elixir have their own stringent syntax rules. Not following them causes syntax errors, performance issues, and other problems. This can lead to data immutability issues if the implementation isn’t properly done, something only an experienced Phoenix developer can actually do.  

How To Choose The Best Phoenix Developer

A skilled Phoenix developer should be experienced in both Elixir and Erlang. They should be able to create high-performance and scalable web applications.

They should have experience writing HTML and JS code. In addition, they should know about functional programming and be able to implement modern APIs through GraphQL. Along with Phoenix, they should also have experience with other Elixir web frameworks like Sugar, Plug, and Trot. 

In addition, they should be able to leverage in-built Elixir and Phoenix features such as scalability, concurrency, and fault tolerance. 


Phoenix has proven to be a reliable framework with high productivity and amazing performance. It has benefited multiple organizations worldwide. Phoenix’s popularity has been on the fast rise, and you should look forward to its further growth and advancement in the technological field.

What is Phoenix LiveView, and what is its purpose?

It’s a feature in the Phoenix framework that allows you to create real-time web interfaces without writing JavaScript code. Instead, using Server rendered HTML code, it creates applications with bidirectional communication without client-side complexities. 

Any application requiring data/page navigation or notifications/events autocompletion is a great fit for LiveView. 

How does Phoenix deal with system failures?

Phoenix logs component interactions and state checkpoints to ensure application recovery in case of a system crash. It maintains the overall state of the applications, thus improving the availability of the application. 

The Phoenix processes are lightweight and independent, so it doesn’t affect the other ones if one crashes. This feature makes sure that the overall throughput of the system isn’t affected. Furthermore, this allows you to perform happy path coding, i.e., you only write code for the most optimal solution without worrying about exceptions or errors. 

Would you advise a client to choose Phoenix over Rails and Why?

Phoenix delivers better and faster performance as compared to Rails. Phoenix applications are easier to maintain and have high scalability, while Rails applications require effort and resources to scale. Phoenix is also more reliable for handling high traffic and concurrency applications.

What are some of the dependencies you may install to build a Phoenix application?

Some of the essential Phoenix dependencies are Elixir (1.6 or higher) and Erlang VM (version 20 or higher), a database like PostgreSQL, MongoDB or MySQL, Node.js,  for compiling and using static assets. Developers can also use filesystem watcher tools like inotify tools. 

What makes Phoenix highly scalable?

Phoenix utilizes Erlang BEAM to create scalable web applications that can effectively serve multiple users simultaneously. Its MVC architecture allows you to focus on the business side while handling the boilerplate code itself. In addition, Erlang VM reduces operational complexity, and Phoenix dashboards allow you to check up on processes without worrying about system crashes and faults.

We are looking for a smart and adaptable Phoenix developer to join our team. They should be team players who are passionate about all aspects of web development. They should also know about database handling and maintenance. The role also includes testing and error handling responsibilities. 

This is an excellent opportunity for result-oriented developers who want to work on amazing projects, learn new skills, and work in a fast-paced environment. 


  • Create, test, and execute highly-optimized Elixir code. 
  • Implement and maintain Phoenix  framework through WebSockets and channels
  • Research and perform complex tasks for the project
  • Work with front-end technologies
  • Work on HTTP requests, server response, and channels
  • Coordinate with product managers and stakeholders to implement business use cases. 
  • Work on documentation.
  • Follow best industry practices and standards
  • {{Add other relevant responsibilities}}

Skills and Qualifications

  • Working knowledge of Elixir, Erlang VM. Should also have experience in Phoenix.  
  • Experience in writing business logic code without compromising quality. 
  • Proven experience with traffic handling, communication channels, and WebSockets. 
  • Experience with databases and writing complicated SQL statements. 
  • Knowledge of HTML and JavaScript. Should also have experience in other web development frameworks such as Sugar, Plug.
  • Knowledge of VC framework, views, controllers.  
  • Problem-solving skills and team spirit. 
  • {{Add other frameworks or libraries related to your development stack}} 
  • {{List education level or certification required}}

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