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11 April, 2022

What is Haskell Language? 

Haskell is a statically typed purely functional programming language with type inference and lazy evaluation. Haskell is a programming language intended for use in education, research, and industry. It was the first programming language to include features like type classes, which allow for type-safe operator overloading. Haskell's primary implementation is the Glasgow Haskell Compiler (GHC). It is named after logician Haskell Curry. 

Haskell's semantics are historically based on those of the Miranda programming language, which served to focus the efforts of the initial Haskell working group. 

In May 2021, Haskell was the 28th most popular programming language based on Google searches for tutorials, accounting for less than 1% of active users on the GitHub source code repository. Haskell is widely used in academia as well as industry. 

Features of Haskell 

Haskell is an expressive language with many features, some of which are as follows: 

  1. Statically typed: In Haskell, every expression has a variable type that is explicitly declared and, thus, determined at compile time. This allows the compiler to determine whether a given variable can perform the actions requested of it. 
  1. Purely functional: Every function in Haskell is a function in the mathematical sense, i.e., ’pure’. There are no statements or instructions, just expressions that cannot change variables (local or global) or access state variables like time or random numbers. 
  1. Type inference: You don't have to explicitly write out every type in a Haskell program. Types will be inferred by bidirectionally unifying all types. 
  1. Concurrent: Haskell lends itself well to concurrent programming due to its explicit handling of effects. The company's flagship compiler, GHC, includes a high-performance parallel garbage collector as well as a lightweight concurrency library with a wide range of useful concurrency primitives and abstractions. 
  1. Lazy Evaluation: Lazy evaluation is a code execution mechanism that postpones evaluating an expression until its value is required. 
  1. Packages: The Haskell open-source community is very active, and there is a diverse set of packages freely available on public package servers. 


Sample the "Hello, World!" program in Haskell 

How iMocha can help you hire Haskell Developer  

iMocha offers the following question types to review candidates’ technical skills and understanding. 

  1. MCQ 
    A multiple-choice question (MCQ) is made up of two parts: the question or problem and a set of alternatives or answers that include a key, which is the best answer to the question, and a few distractors, which are convincing but incorrect answers to the question. 
  1. AI-LogicBox 
    AI-LogicBox is an artificial intelligence-based pseudo coding platform designed to assess programmers’ logical and problem-solving skills. 

Also Read: How to add a LogicBox question in my question? 

  1. Coding Questions 
    iMocha has a wide range of question types to test the candidate skills with many parameters. While screening for a developer role, you can test the coding skills of the candidate. 

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Hiring a Haskell Developer for your team  

Haskell has the potential to benefit large systems. It is well suited for production and is as of now in use in the industry. In addition to being a general-purpose language, Haskell is ideal for proprietary business logic and data analysis, rapid prototyping, and enhancing existing software environments with the right code, performance, and scalability. 

If you want to hire a Haskell programmer, you should make sure they can work on the project you have in mind. 

Let us look at the skills you should look for in a Haskell Engineer. 

  1. They must have a thorough understanding of Haskell and, preferably, prior experience with other functional programming languages. 
  1. They must also be able to demonstrate project management experience. The more projects they work on, the more experience they will have to offer you. 
  1. Participating in a variety of Haskell projects will also allow them to demonstrate soft skills such as problem-solving, communication, teamwork, and so on, all of which are necessary for any programmer. 

Now, let us take a closer look at the skills to look for. 

  1. Haskell programming 
  1. Excellent mathematics skills 
  1. Programming abilities in languages such as Scheme, Scala, and Standard ML  
  1. Version control systems such as Git 
  1. Complete understanding of database technologies and its usage 
  1. Good Understanding of compilers 
  1. Debugging abilities 



Haskell allows for quick development, simple maintenance, high performance, and a mature ecosystem. Haskell is an exceptionally good package for developing secure software among the current valid options of general-purpose computer languages. 



Deval Solanki
Deval Solanki
Deval Solanki is a Business Analyst at iMocha. With a background in Computer Science, he has worked for over 2 years as a Research and Development Analyst. He's very passionate about science and technology. In his spare time, he likes to read about the technological advancements, watch scientific experiments, and indulge in sports activities.

Topics: Tech Recruitment, Remote Hiring, Skills Assessment

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