Hire Top Freelance Scala developers with UltraGenius

UltraGenius is a marketplace for top software developers, engineers, programmers, coders, architects, and consultants. Top start-ups and companies choose developers from UltraGenius platform for their critical software projects.
Hire from UltraGenius network & scale your engineering team in a matter of few days.

Trusted By

download (1)

Here are the top Scala developers for hire who are top 1% among 20K+ freelance Scala developers


Freelance Scala Developer

Rishabh is a software engineer having 7+ years of experience in developing object-oriented applications and building distributed, fault-tolerant and concurrent systems using Scala.

Expert in


Core Java




10 Years


Full Time


Haskell Freelance Developer

Mahesh is a software engineer having 3+ years of experience in parallel processing of massive data sets and designing high-performance web applications.

Expert in






10 Years


Full Time


Part-time Haskell Freelancer

John is a software engineer having 10+ years of experience in developing Big Data applications and building parallel data distributed systems using Scala.

Expert in






10 Years


Full Time

Hire the best Scala developers with UltraGenius

Scala is a popular  programming language which is both statically and dynamically typed and combines object-oriented programming with functional programming.  Scala is widely used in developing applications, data processing, and parallel data processing, and distributed computing. Scala compiles faster as compared to Java because of its tail recursion optimization technique and hence widely preferred for data processing.

What UltraGenius offers?

Fast Hiring

UltraGenius ensures that top quality freelance developers with the most talent are hired in less than 72 hours.

Intelligent Matching

The matches are specifically curated as per your needs. We dim fit 3 skills - Tech, Culture, and Context Fit.

Rigorous Vetting

UltraGenius conducts tests and ensures that only the most suitable developer with the best skills is hired.

UltraGenius provides you only the top Scala developers for hire in 4 easy steps

Tell us the skills you need

We’ll schedule a call and understand your requirements.

We find the best talent for you

Get the list of pre-vetted candidates in days.

Schedule the interviews

We will arrange a call after understanding your requirements.

Begin your trial

Start working with UltraGenius with a 1-week trial period.

Our Happy Clients

UltraGenius is the best remote talent network to meet with brilliant developers who are most talented and skilled in the technical field. UltraGenius provides the most fit developers who not only match our job requirements but also our company's culture and working environment.
Once you are part of UltraGenius, you don't have to look for another platform which can find the top skilled freelance developers with same effort as UltraGenius. UltraGenius's vetting tests and assessments are unmatchable and provides the perfect match for the job role.
Our company is thankful to UltraGenius wholeheartedly. UltraGenius's pace of finding the top 1% freelance developers is unmatchable. Not only UltraGenius developers are the ones who match our job requirements but also the best fit to our company's working culture .
OYO Rooms

Join 200+ Fast-scaling Start ups
and Fortune 500 Companies that have hired freelance Scala developers with UltraGenius

Want to hire freelance Haskell developers on your own? Here are the skills you must look for while hiring a freelance Haskell developer

Hiring freelance Scala developers might be an intricate task for you if you are a non-technical manager. Scala is widely used in parallel data processing in the system, distributed computing, and developing robust web applications. Its tail recursion technique compiles the code faster than any other language. But, hiring the top talented freelance Scala developers among thousands of developers is a challenging task for anyone. So, UltraGenius is here to assist you while recruiting the top talented freelance Scala developers on your own. UltraGenius understands your job requirements and gets you only the top developers who have in-depth knowledge of software development.

The following skills you must look for while hiring a freelance Scala developer – 

Knowledge of Apache Spark

Apache Spark is widely known framework written in Scala. Spark provides a high-level APIs in Scala, Java, Python, and R language. Apache Spark overcomes the limitations of Apache Hadoop with 100 times faster in-memory and 10 times faster hard disk memory. Apache Spark has also been used for sorting 100TB of data 3 times faster as compared to Apache Hadoop. Apache Spark provides optimal query solution by utilizing in-memory caching.

Knowledge of Scalatra

Scalatra is a web micro-framework which is very efficient for building RESTful applications and is best for designing asynchronous lightweight stateless application. Scala is functionally used as a port for Ruby’s Sinatra and primed for building a very high performance web service. Scalatra lets freelance Scala developers use all the 16-core available servers and also gives them Scala’s modern concurrency management constructs. Scalatra is the best server to work with application designed with Angular.js, Ember.js, and Backbone.js on the front-end.

Scala's Play framework

Play is a popular framework of Scala used for increasing JVM’s performance and its libraries to build powerful RESTful applications. Play 2 is a reactive version of Play that provides remote calls in parallel. Play works excellent with web sockets and other server-centric approaches. Besides this, Play provides support for asset compilation, database integrations, format handling, etc. and ensures more security and consistently codebase review to freelance Scala developers.

hire remote developer
hire freelance .net developer

Familiarity with Scala frameworks and libraries

There is a vast set of Scala frameworks and libraries which helps freelance Scala developers in faster application development. Check if the Scala freelance developer knows about Play, Lift, Grails, and Scalatra frameworks and also the popular libraries like Apache Spark MLib and ML, Akka, Spray, Conjecture, Slick, DeepLearning4J, BigDL, H20 Sparkling Water, and Apache PredictionIO.

Experienced in working with Version Control System (VCS)

Freelance Hire Scala developers must be very skilled in version control systems, such as Git, SVN, TFS and Mercurial. Freelancers mostly use Git for their work since it helps the team to collaborate and maintain your code. It also allows them to review old codes and compare with new ones while pulling up or pushing down changes on a repository. Along with this knowledge of using commands like add , push , pull & commit, branching, merging they are able to work independently on their code without any help from other members of the group

freelance developer
hire php developer freelance

Knowledge of Akka HTTP

Akka HTTP is a robust and modular implementation developed for Scala. Akka HTTP modules provide a “Routing DSL” for defining REST services and functionality of the complex web services and frameworks like static content serving, content negotiation, and URIs deconstruction. It is like a toolkit which provides and consumes HTTP-based services. Akka HTTP greatly supports HTTP Persistent Connections and asynchronous HTTP streaming which includes “chunked” transfer encoding accessible via  WebSocket support API.

Practical experience with Functional Programming

Scala combines functional programming and object-oriented programming, the freelance Scala developers must have hands-on experience in functional programming. Functional Programming is a paradigm of building software by composing pure functions without mutating state and data. Functional Programming enhances the productivity of the program. It provides immutable data structures that are not faced with race conditions and  thereby employs safe multi-threading. Functional programming comes under the “Declarative Paradigm” in which the program logic is written without explicitly describing the flow control.

part time remote software developer
hire remote developer

Knowledge of front end technologies like React or Angular

Freelance Scala developers  must have basic understanding of front-end frameworks  particularly React.js or Angular.js. These front-end frameworks are greatly required in today’s market. React is popular for its faster development of Single Page Applications while Angular uses interpolation, dependency injection, and eliminates coding mistakes by using the strongly typed Typescript that resolves many challenges faced by the developers.

Hands-on experience with Cloud

Cloud Computing is concerned with delivering services through Internet. Platform as a Service (PaaS), Infrastructure as a Service (IaaS), Software as a Service (SaaS) are the types of Cloud services. Scala is becoming popular in the realm of Cloud Computing because of its functional aspect which makes Scala excellent for developing Domain Specific Languages (DSLs). A domain specific language mainly focuses on a particular area of specialization. A Cloud Specific Language (CSL) is one such DSL category with cloud as its specialization area. You must hire Scala developers based on their knowledge based on their experience working with Cloud and also check if they are familiar with any of the third party services which provide Cloud – AWS, Amazon, Google Cloud, IBM, Alibaba, and more.

Knowledge of Object Oriented Programming

Scala combines both the Object Oriented Programming and Functional Programming. OOP helps freelance Scala developers implement real world Scala applications. For example, if you want to design a messaging app, you have to first design a message class that contain all the information about sender,  message content, receiver, and message identity all inside a single class. Check the knowledge of Encapsulation, Inheritance, Polymorphism, and Abstraction while hiring the freelance Scala developers. Check whether the freelance Scala developer knows about early or static binding, dynamic binding or late binding, various types of inheritance, etc. 

Experience working with Slick database

Slick allows Scala developers to work with stored data and write database queries with Scala composition. Slick provides compile-time safety and static checking. It provides freelance Scala developers with additional functionalities like safety at compile time, static checking, and Scala compositionality. Slick is similar to immutable collections while dealing with relational data. Furthermore, Slick also provides flexible query composition and strong control side effects.

Experience working with Java

The freelance Scala developer must know Java language as most of the development work in Scala is done using Java. Java is one of the widely used object-oriented programming language designed to have as minimum implementation dependencies as possible in an application. Java is a language used on both client-side and server-side in Scala. 

Knowledge of Parallel processing

Parallel processing is dividing a larger task into several smaller tasks which makes CPU simultaneously work on each of those tasks  Parallel processing allows running multiple tasks of a process concurrently  thereby enhancing CPU’s processing capability and providing an increasing throughput. It sorts out the data much faster than ever which saves a lot of time and money in processing data.

hire part time web developer

Knowledge of Lift framework

Lift is a highly secure, powerful, developer centric modular, interactive and scalable Scala framework specifically designed to address security issues including – code injection and cross-site scripting. Lift is designed to handle large traffic levels and is resistant to many of the Open Web Application Security Project (OWASP) vulnerabilities. Lift designs abstractions that provides easier business logic expressions and maps them to HTTP and HTML.

Pay only after one week trial period

UltraGenius provides top Scala developers for hire at the lowest prices

Scala is widely used programming language for static systems, big data analytics, and web application development. But recruiting the best freelance Scala developers is not an easy task when a large no. of Scala freelance developers are competing to grab the job opportunities.

Top Interview Questions to ask while hiring a freelance Scala developer

Scala is robust language designed mainly for parallel data processing, distributed computing, and application development. Scala makes it possible to combine both functional programming and object-oriented programming approach. This unique feature of Scala makes freelance Scala developers write better and high-performance code with many powerful features like lambda expressions, macros, functions, and tuples. 

Object-Oriented Approach of Scala : -

object Scala_program{

def main(arg : Array[String]){

println("Welcome to UltraGenius")



Output - Welcome to UltraGenius

Functional Programming Approach of Scala for the same code :-

def scala_program{

println("Welcome to Interviewbit");



Output - Welcome to UltraGenius

Scala is widely used in processing massive amounts of data becuase of its parallel processing ability which process petabytes of data parallely, making CPU more efficient and saves a lot of time in computation.

Higher order functions takes another function as an argument or returns the output as an argument. Higher order functions makes your code more concise and high-performing. For example, here apply function takes another function as an argument.

object UltraGenius{

def main(arg : Array[String]){

println(apply(format, 25))


def apply(x : Double  => String, y : Double) = x(y)

def format[A] (a : A) = "{" + a.toString() + "}"

The output of the above program is {25.0}.

Scala Closures are the functions in Scala whose return value is dependent on one or more variables that are declared outside that function.

A lambda expression is an anonymous block of code with a more concise and functional syntax. Lambda expressions prevent developers write multiple lines of code and make the program look clean and concise. Lambda expressions can be stored in a variable also if the data type of that variable is an interface which contains only one method. However, the condition is that the lambda expression must have the same number of arguments with same data type and same return data type as that of the method in the interface. 

Immutable objects in Scala provide thread-safe data and prevent errors in distributed computing. Freelance Scala developers must know about immutability concept in Scala to avoid making unwanted changes in variables, and type extra arguments. It is easier to parallelize programs when the objects are immutable as no conflicts occur between the objects. The internal state of the program will not get affected even if your program contains exceptions.

Currying is a popular technique for transforming functions and converts a function with multiple arguments into a sequence of function(s) with only one argument. Currying refactors your code easily and gives the advantage to use the techniques designed for the one argument functions.

Monads in Scala are used to perform sequential calculations around a specific value augmented with some special feature. A monad is an object that wraps another object and the output of each step serves as an input to the next step. For example, FlatMap is an example of monad which applies one to many transformations to the elements and flattening the result. It is different from map in the way it produces output to a set of multiple arbitrary values. 

Scala has the default packages - java.lang, java.io, and PreDef. 

java.lang - java.lang is the fundamental package which provides a variety of classes and functions to utilize. Objects and Classes are the core classes. java.lang.Object is the root class of any class in the hierarchy and java.lang.Class provides the freelance Scala developer to create classes as instance to this class.

Tail recursion is the unique feature associated with Scala programming language. A recursion is called a tail recursion if it is the last task that is done by the compiler. Normally, while performing regular recursions, the recursive calls are not optimized as there is the need to track the state of each recursive call. But, in tail recursion, the need to store the previous state of the recursive function.

Frequently Asked Questions

UltraGenius is one of the leading platforms for hiring remote talent and connecting freelance and part-time developers with Silicon Valley businesses. We focus on finding the best talents who will perform extremely well and will be easily integrated into your teams. We filter out only the top 1% most skilled freelance developers among the 20K+ developers who have applied on our platform. Candidates have to prove their self-reported experience by giving Ultragenius’ s skill tests.

UltraGenius first tests the developer’s skill set by conducting a two and half hour hiring test. Our hiring test judges a candidate on all aspects like aptitude, case study analysis, verbal and reasoning, coding questions based on data structures and algorithms, software engineering, system design, and more. Then, there is another round for the candidates who are selected from this round called “Higher-level Assessment Skill Test”, which is a video round that deeply analyzes Scala freelance developers’ major skills and asks questions about the projects they have worked upon.

Fill up the form which is on every hiring freelancers’ page and we will inform you once we select the top 1% freelance Scala developers matching your job requirements.  After analyzing the candidates based on their resumes and two assessment tests, we provide you the feedback quickly. And if the freelancers selected by our team are fit for your job role, then we also provide the onboarding.

UltraGenius offers you only the most skilled freelance developers who are top 1% among the 20K+ freelance developers who have applied on our platform. After a rigorous selection and testing process, we sort out only the top candidates for you. You can check out UltraGenius’ s selection process for hiring freelance Scala developers on https://www.ultragenius.club/hire-scala-freelancer/.

UltraGenius provides you the best facility to hire freelancers in more than 50 skills like React, Angular, Javascript, Node, Java, Python, Magento, Ruby On Rails, Golang, PHP, WordPress, .NET, Android, iOS, DevOps, Machine Learning, and many more.