Intro

In this article I am going to present some of the most useful Scala libraries and frameworks which help ASSIST Software engineers to develop highly scalable applications that support concurrency and non-blocking.

What is and why Scala

Scala is a programming language for the Java Virtual Machine (JVM) that integrates features of both object-oriented and functional programming. Scala provides a best-of-all-worlds experience for developers, it’s compatible with classic Java libraries and it’s designed to express common programming patterns in a concise and elegant way. But most important: Scala provides a type-safe language with powerful concurrency on top of a mature ecosystem.

Scala Programming language
Web Frameworks

There are lots of Scala frameworks which you can use to develop web applications quickly and easily, but I will present the ones which are mostly used:

Play

Play is the official Scala framework supported by Typesafe Inc., creator of the Scala programming language. Play is a modern web framework which combines productivity and performance making it easy to build scalable applications. This framework is ideal for developers who are more familiar with the MVC architecture.

Spray

Spray is not a framework, it's a suite of lightweight and very fast Scala libraries designed to build RESTful web services on top of Akka. With Spray you can develop standalone service based on spray-can module which provides a low-level, low-overhead and high-performance HTTP server and client. You can also develop a web service which runs inside a Jetty server.

Using Spray together with a JavaScript framework like AngularJS, jQuery, Backbone or many others, you can approach the new trend of the web applications by moving the business logic from the server into the client side.

Lift

Lift is another popular, secure and powerful full stack web framework for scala. Lift is based on a View First approach as opposed to the typical MVC architecture, that means it divides web components into snippets, not in pages. The big plus of this framework is the native JavaScript/Ajax support, which offers an easy way to develop complex interactive web pages.

Other great scala web frameworks

Scalatra

Scalatra is an easy to understand micro-framework and a great option if you want to build lightweight and simple applications. Scalatra is inspired by Sinatra which is a Ruby framework.

Finatra

Finatra is another async web framework inspired by Sinatra, but this one runs on top of Finagle, a RPC System created by Twitter.

BlueEyes

BlueEyes is a purely asynchronous, extremely high-performance framework, intended only to create RESTful web services.

Database

In this section I will present a few scala libraries that allow you to access SQL databases like MySQL or PostgreSQL, but also NoSQL databases like MongoDB.

Slick

Slick is an easy, scalable, concise, safe, compositional and mature database query and access library for Scala. Slick tries to make queries use the same for comprehension as Scala collections do. It’s supported by Typesafe Inc. and can be used only on the following databases systems: H2, MySQL, PostgreSQL, SQLite, Derby/JavaDB, Microsoft Access, HSQLDB/HyperSQL.

Slick is to Hibernate and JDBC, what Scala is to Java and Groovy.

Squeryl

Squeryl is an ORM which is completely type-safe and the queries are written in a DSL that is close to SQL. This library allows you to explicitly control the granularity of data objects that are retrieved while it provides an elegant solution to the N+1 queries problem.

Squeryl is more like Hibernate.

Activate

Activate is a great scala framework to persist objects in different paradigms such as relational, prevalence and non-relational. It’s designed to be simple and uses Software Transactional Memory, which is a concurrency control mechanism to handle with transactions in-memory, without needing to use transactional control from the storage.

Activate is the best choice for applications with concurrent bank transactions.

Salat

Salat is an ORM for MongoDB which provides fast, simple, bidirectional serialization between Scala Case Classes and DBObject. Salat is based in Casbah, the official MongoDB driver and because of that Salat has the following restrictions:

  • can’t support nested inner classes
  • doesn’t use a class type at the top-level to a trait or an abstract superclass
  • any type of Map must have String key only which do not contain “.”or “$”

Salat is the most used MongoDB persistent library.

ReactiveMongo

ReactiveMongo is an asynchronous, non-blocking Scala driver for MongoDB. In a classic synchronous driver like Casbah, each operation blocks the current thread until a response is received and that can be a problem if you have an application with multiple concurrent accesses to the database.

ReactiveMongo is young, but mature enough to be used in production.

JSON Manipulation
Spray-json

Spray-json is a lightweight, clean and efficient JSON implementation in Scala and is based on the parboiled parsing library. Considering the deserialization time, spray-json is nor the fastest library, neither the slowest. Another negative aspect is the limit to parsing json data with more than 22 fields. This limit is because spray-json is based on Tuples, where the maxim type is Tuple22. However spray-json is a very used library because it offers an easy way to manipulate entities from/to JSON.

Jackson-module-scala

Jackson-module-scala is the fastest JSON parser and is the official Scala support module for Jackson (Java library). You can also use the java library in your scala project and will obtain the same performance, but by using jackson-module-scala you will have support to serialization and deserialization of scala Case Classes, Sequences, Maps, Tuples, Options and Enumerations.

Json4s

Json4s is a very promising project where the aim is to provide a single AST to be used by other Scala JSON libraries. Json4s has an extremely rich functional API and supports multiple backends like Lift JSON or Jackson and has native support from Spray and Scalatra.

Testing
Specs2

Specs2 is an open source library based on specifications. Specs2 supports unit testing for one class (unit specifications) and acceptance testing for the full-system (acceptance specifications). The specs2 tests are asynchronous and each runs in its thread using a Promise, that’s why it works well with Akka.

ScalaTest

ScalaTest is another great testing library which can be used to do unit tests, functional tests, performance test. ScalaTest offers deep integration with tools like JUnit, Mockito, ScalaCheck, Selenium, ScalaCheck and supports TDD (Test Driven Development), BDD (Behavior Driven Development) and acceptance testing.

Scalastyle

Scalastyle is a scala style checker which examines your code and indicates where you are not respected the grammar or the functional programming principles in Scala. It can be integrated with Intellij or Eclipse, but also it can be used with SBT, Maven, Gradle.

Metrics and Monitoring
Kamon

Kamon is a set of tools that help you to get metrics from your applications built with Spray, Akka or Play. Kamon offers support to be integrated with other backend services like StatsD and Graphite which are free but it can also be integrated with New Relic.

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Frequently Asked Questions

1. Can you integrate AI into an existing software product?

Absolutely. Our team can assess your current system and recommend how artificial intelligence features, such as automation, recommendation engines, or predictive analytics, can be integrated effectively. Whether it's enhancing user experience or streamlining operations, we ensure AI is added where it delivers real value without disrupting your core functionality.

2. What types of AI projects has ASSIST Software delivered?

We’ve developed AI solutions across industries, from natural language processing in customer support platforms to computer vision in manufacturing and agriculture. Our expertise spans recommendation systems, intelligent automation, predictive analytics, and custom machine learning models tailored to specific business needs.

3. What is ASSIST Software's development process?  

The Software Development Life Cycle (SDLC) we employ defines the stages for a software project. Our SDLC phases include planning, requirement gathering, product design, development, testing, deployment, and maintenance.

4. What software development methodology does ASSIST Software use?  

ASSIST Software primarily leverages Agile principles for flexibility and adaptability. This means we break down projects into smaller, manageable sprints, allowing continuous feedback and iteration throughout the development cycle. We also incorporate elements from other methodologies to increase efficiency as needed. For example, we use Scrum for project roles and collaboration, and Kanban boards to see workflow and manage tasks. As per the Waterfall approach, we emphasize precise planning and documentation during the initial stages.

5. I'm considering a custom application. Should I focus on a desktop, mobile or web app?  

We can offer software consultancy services to determine the type of software you need based on your specific requirements. Please explore what type of app development would suit your custom build product.   

  • A web application runs on a web browser and is accessible from any device with an internet connection. (e.g., online store, social media platform)   
  • Mobile app developers design applications mainly for smartphones and tablets, such as games and productivity tools. However, they can be extended to other devices, such as smartwatches.    
  • Desktop applications are installed directly on a computer (e.g., photo editing software, word processors).   
  • Enterprise software manages complex business functions within an organization (e.g., Customer Relationship Management (CRM), Enterprise Resource Planning (ERP)).

6. My software product is complex. Are you familiar with the Scaled Agile methodology?

We have been in the software engineering industry for 30 years. During this time, we have worked on bespoke software that needed creative thinking, innovation, and customized solutions. 

Scaled Agile refers to frameworks and practices that help large organizations adopt Agile methodologies. Traditional Agile is designed for small, self-organizing teams. Scaled Agile addresses the challenges of implementing Agile across multiple teams working on complex projects.  

SAFe provides a structured approach for aligning teams, coordinating work, and delivering value at scale. It focuses on collaboration, communication, and continuous delivery for optimal custom software development services. 

7. How do I choose the best collaboration model with ASSIST Software?  

We offer flexible models. Think about your project and see which model would be right for you.   

  • Dedicated Team: Ideal for complex, long-term projects requiring high continuity and collaboration.   
  • Team Augmentation: Perfect for short-term projects or existing teams needing additional expertise.   
  • Project-Based Model: Best for well-defined projects with clear deliverables and a fixed budget.   

Contact us to discuss the advantages and disadvantages of each model. 

1. Is ASSIST Software a reliable company for custom engineering?

Absolutely. Our partners have given us great recommendations and reviews, leading us to win The Manifest Award for Most Reviewed Software Developers. Further proof comes from our 97% employee retention rate and ongoing client partnerships for over 8 years.  

2. Are the ASSIST Software Romanian software engineers certified?

Yes. 85% of our software programmers are certified.  

At a company level, ASSIST Software is certified and recognized by industry players such as Microsoft, AWS, Google Cloud, Adobe, Drupal, Fujitsu, ISTQB, and others.  

Our employee certifications are tremendously important as they reflect the shared commitment to long-term growth.

3. Why should I choose Romania for custom software development? 

Romania has become a significant player in custom software development, attracting businesses worldwide. Romania boasts the highest number of certified IT specialists in Europe and ranks sixth globally, surpassing even the US in tech specialists per capita.  

At ASSIST Software, what sets us apart is our team and our location: our engineers are certified, experienced, and flexible, while being in the +2 GMT time zone allows us to easily facilitate meetings with clients all over the world.

4. What team will work on my project, and where will it be located?

ASSIST Software's headquarters is in Romania, a prime country for software development outsourcing. Our 350+ software engineers speak English and have a deep passion for innovation.  

We provide regular project updates through reports, meetings, and online dashboards. Generally, you'll have access to a dedicated project manager who will be your point of contact for any questions or concerns.  

5. How much will my project cost me?

Our prices are competitive, and as per our working model, we guarantee you will be satisfied with the result. Frequent meetings, check-ins, and a great communication structure will ensure this outcome.   

Project costs depend on various factors, including complexity, scope, required technologies, and team size. We'll gather detailed information about your project during the initial consultation to provide a customized quote and we guarantee that you will be able to see the benefits of bespoke software.  

1. What technologies do you work with?

ASSIST Software tackles your projects with a robust tech stack. We build native and cross-platform mobile apps, craft user-friendly web experiences, and create stunning visuals. 

Our wide-ranging expertise starts from Java, Python, and JavaScript frameworks to cutting-edge solutions like AR/VR, blockchain, and AI/ML. We also manage databases, leverage cloud platforms, and ensure flawless project execution. We're your one-stop shop for exceptional software development from concept to deployment. You can view our expertise for more details.   

2. Are you experienced in AI/ML development?

Yes. We have extensive experience in data engineering and machine learning operations (MLOps). We can employ neural networks, computer vision, and AI models to benefit your ideas.   

You can trust our long-term experience with big data, NLP, and sentiment analysis, as over the past three years, we led a European security project with 15 partners focused on detecting radicalization on social media and the dark web.

3. Do you have a research and development department and work on European Projects?

We know R&D is crucial for businesses to stay competitive and thrive in dynamic markets. Successful R&D efforts lead to developing exceptional products or services, improved efficiency and effectiveness in operations, and enhanced market positioning.   

We have established solid partnerships with 160+ European research companies, universities, and research centers (e.g., Fraunhofer, TWI, University of Heidelberg, REWE Group, SINTEF, etc.) and have participated as technical partners in over 25 EU-funded projects.  

4. Besides custom software solutions, what other services do you offer?

  • Design Thinking for Breakthrough Products:  

    We craft user experiences that resonate. Our design process is an immersive collaboration, starting with workshops to uncover your vision and user needs. We conduct market research, analyze the competition, and guide you toward cutting-edge solutions in accordance with your business requirements.  

  • Digital Transformation to Reimagine Your Business:

    Digital transformation is nothing less than a strategic shift. We empower you to become more agile and data-driven, optimizing core processes for the digital age.  

  • Scale with Confidence as We Build for Growth:  

    We understand that business success and development mean new challenges. Our solutions are built to scale seamlessly, accommodating increasing user bases and data volumes without sacrificing performance or security.  

5. As a company, does ASSIST have its own software products?

Yes, ASSIST Software teams have been involved in designing and developing innovative products that address community needs. One such example is the web and mobile platform Autisma. This therapy assistant enables continued learning for children diagnosed with autism spectrum disorder.   

Our extensive knowledge of the Unity and Unreal engines has allowed us to develop two mobile games, Elly and the Ruby Atlas and Hooman Invaders, as well as various Unity Assets, such as the Real-Time Weather PRO and Easy Sky. These two Unity assets allow Unity developers to control the weather and sky in their projects.   

1. Is ASSIST Software hiring right now?

We are always looking for great people to join our team, whether you're a senior software engineer or a new talent seeking an IT career. Please check our careers page and contact us. Our HR department will contact you as soon as possible.   

2. Is ASSIST Software organizing internships?

Yes. Each year, we organize individual and group internships for students. Our long-term partnership with the Stefan cel Mare University of Suceava allows us to put together great events for students and help them get started in the industry. 

3. What type of learning culture does ASSIST Software encourage?

Our focus on innovation comes from a 'can do' attitude and the continuous learning we encourage our colleagues to pursue. We frequently organize workshops, learning sessions, presentations, and masterclasses. All these events are free and open to our colleagues and aim to support their professional and personal development. 

4. How does ASSIST Software focus on teamwork?

The key to stellar teamwork is the quality time we spend together. ASSIST employees and their families are frequently invited to participate in all activities. We encourage a healthy lifestyle by promoting and organizing hikes, bike riding sessions, marathons, volleyball, football and tennis matches, ping-pong championships, and many more.   

We show our care for the environment through reforestation campaigns and forest cleaning activities.   

We also have an English-speaking club, e-sports gaming nights, tech discussions, networking parties, and board game sessions.   

5. How does ASSIST Software give back to the community?

Volunteering and charity are essential to us, which is why we founded the ASSIST Humanitarian Foundation. We genuinely care about our community and want to improve the future. We invest in IT equipment for schools and award excellent teachers. We also help hospitals and fire departments enter the 21st century.   

We sponsor cultural events and deliver humanitarian aid to those in need. If you agree with our views, you can also donate.   

ASSIST Software Team Members