Full Stack Java Software Development

Are you looking for one or more competent and experienced full-stack Java developers for your web applications?

xioo® is an IT service company that offers full stack development services.

xioo® offers you the opportunity to book experienced developers with several years of experience in software development for large companies at an attractive price of only EUR 89.00 per hour (including VAT).

Our developers have many years of experience in software development for large companies, are very reliable and have already completed several successful projects for Deutsche Telekom, T-Systems, Deutsche Rentenversicherung Bund, Volkswagen and Bundesdruckerei.

You can rely on our developers who work 100% remotely and focus exclusively on the implementation of precisely specified tasks.

Secure additional developer expertise now and make your next project a success with xioo®!

Develop scalable web applications in no time with our full-stack developers.

Our full stack developers are experts in working on both the front-end and back-end side of a web application.

We offer a wide range of services covering all stages of the development process , including:

• Application Architecture : We design the architecture of your application, which forms the basis for development.

• Front-end development : We develop the user interface of your application and implement the design and functionalities on the client side using leading JavaScript frameworks such as React, Angular or Vue.js.

• Back-end development : We are responsible for developing the application logic and interacting with the database. We use the Spring framework for implementing RESTful APIs, database access and authentication.

• Database design and implementation : We design and implement your application's database, including defining the database structure and implementing queries and scripts.

• Testing : We develop tests to ensure the quality of your application. We test the functions on the client and server side as well as the database.

• Deployment : We are responsible for deploying your application to a production environment, including configuring and monitoring the server infrastructure.

• Maintenance and development : We provide continuous maintenance and development of your application, including bug fixing, updating libraries and frameworks, and implementing new features and modules.

Our full stack developers are highly trained and have extensive experience in web application development. We offer a customized solution for your business to ensure your requirements are met and your application meets the highest standards.

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We use the following methods and technologies within a software project:

1. Agile development : Agile methods such as Scrum or Kanban are widely used and enable a development team to react quickly to changes in the course of the project.

2. Test Driven Development (TDD) : TDD is a methodology in which developers write tests before writing the actual code. This ensures that the code is well tested and that potential problems are detected early.

3. Microservices : Microservices are an architecture in which an application consists of many small, independent services. Each service has its own database and can scale in its own way.

4. RESTful APIs : RESTful APIs enable applications to communicate with each other by calling them over the HTTP protocol.

5. Databases : We use various databases, such as MySQL, PostgreSQL or MongoDB.

6. Frontend frameworks : To create user interfaces, we use frontend frameworks such as Angular, React or Vue.js.

7. Cloud platforms : Cloud platforms such as Amazon Web Services (AWS), Microsoft Azure or Google Cloud Platform allow us to host and scale the applications in the cloud.

8. Build Tools : We use build tools like Maven or Gradle to automate the build process and dependency management.

9. Continuous Integration and Deployment (CI/CD) : CI/CD is a method in which code is automatically tested on a test environment and, if successfully verified, deployed to a production environment.

10. DevOps practices : DevOps encompasses a set of practices designed to improve collaboration between developers and IT operations to enable faster, more efficient application delivery. For example, we use Docker to isolate and manage an application in a container.

We use the following methods and technologies in the areas mentioned.

“Agile Development” area:

1. Scrum : Scrum is an agile project management method that enables teams to respond quickly to changes in the project and improve the way they work.

2. Kanban : Kanban is an agile methodology that focuses on continuous delivery of software. It is particularly useful for teams working on a continuous improvement process.

3. Pair Programming : Pair programming is an agile methodology in which two developers work together to write code. This improves the quality of the code and reduces bugs.

4. Continuous Integration and Continuous Delivery (CI/CD) : These technologies enable developers to test, review, and deploy code automatically, reducing manual tasks and allowing teams to focus on development.

5. Test-driven Development (TDD) : TDD is an agile methodology in which tests are written before the code is implemented. This helps developers identify defects early and improve the quality of the code.

6. DevOps : DevOps is an agile practice that brings together development and operations to improve software delivery.

7. Agile Retrospectives : Agile Retrospectives are a regular meeting where the team talks about the past period of work to identify what worked well and what needs improvement.

8. JIRA : JIRA is a tool that enables teams to manage and monitor agile processes such as Scrum and Kanban.

“Test Driven Development (TDD)“ area:

In the area of ​​Test Driven Development (TDD), a full stack developer with the Java/Spring Tech Stack typically uses the following methods and technologies:

1. JUnit : JUnit is a Java testing framework used by many developers for TDD. JUnit allows developers to write unit tests to ensure that the code works correctly.

2. Mockito : Mockito is a Java framework that allows developers to create and use mock objects. Mock objects are placeholder objects that can be used to simulate the functionality of other objects in a test.

3. Spring Testing Framework : The Spring Testing Framework provides various tools and features to simplify the development of tests in Spring-based applications. For example, it provides support for integration tests and mock objects.

4. Continuous Integration (CI) : Continuous integration is a practice where code changes are automatically integrated into a shared code base. This is usually automated by a CI platform such as Jenkins or Travis CI. By integrating TDD into the CI process, developers can ensure that code is always tested and that changes do not introduce unexpected bugs.

5. Code coverage tools : Code coverage tools help developers ensure that their tests are sufficient and that they cover all relevant code paths. Tools like JaCoCo or Cobertura measure code coverage and show which code paths are covered by tests and which are not.

Overall, TDD is about writing tests before implementing code. The tests serve as a specification of the application's functionality and help ensure that the code works correctly.

“Microservices” area:

• Spring Boot : Spring Boot is a framework that enables rapid development of microservices using Spring. It facilitates the configuration and operation of Spring-based applications and offers numerous features needed for microservice development, such as support for RESTful APIs and database integration.

• Spring Cloud : Spring Cloud is a collection of libraries and frameworks built on top of Spring Boot and specifically designed for microservices development. It provides various features such as service discovery, configuration management and circuit breaking that are helpful in microservices development.

• Docker : Docker is a container platform that allows applications to be isolated and packaged in containers. It makes it easier to deploy and scale applications and is well suited for use in microservice architectures.

• Kubernetes : Kubernetes is an open-source system for automating the deployment, scaling, and management of containerized applications. It provides various features such as load balancing, service discovery, and auto-scaling that are helpful in developing microservices.

• API Gateway : An API gateway is a central entry point for all requests to a microservice architecture. It can provide various features such as security, load balancing and caching and allows developers to decouple and manage APIs.

• Continuous Integration and Continuous Deployment (CI/CD) : CI/CD is a methodology for automating the build, test, and deployment process of applications. It enables developers to quickly and reliably make changes to the microservices and ensure that they work properly in production.

• Service monitoring : Service monitoring is an important part of microservice development as it allows developers to monitor the health and performance of individual services. There are various tools and services for this, such as Prometheus or Grafana.

These methods and technologies manage the complexity of microservice architectures and enable efficient development and deployment of microservices.

“RESTful APIs” area:

1. Spring Boot : Spring Boot is a framework that simplifies the development of RESTful web services in Java. It provides an integrated environment that enables developers to quickly develop and deploy APIs.

2. Spring MVC : Spring MVC is a framework that helps in developing web applications. It is often used to implement RESTful APIs as it provides an easy way to define URL endpoints and handle HTTP methods.

3. Swagger : Swagger is an open source framework for developing RESTful APIs. It provides, for example, a framework for describing APIs.

4. Postman : Postman is a tool that allows developers to test RESTful APIs. It provides a graphical user interface that allows developers to send HTTP requests to API endpoints and visualize the responses.

5. JUnit : JUnit is a Java testing framework often used when implementing RESTful APIs. It provides an easy way to write and run unit tests against API endpoints.

6. Mockito : Mockito is a framework for mock objects in Java tests. It is often used to write tests of RESTful APIs because it allows developers to create mock objects for dependencies on API endpoints.

7. Jackson : Jackson is a Java library that supports processing JSON data. It is often used when implementing RESTful APIs because it provides developers with an easy way to serialize and deserialize JSON data.

“Databases” section:

We use various methods and technologies in the database area to handle data efficiently and securely. Some of these methods and technologies are:

1. Relational databases : One of the most popular database technologies is the relational database, where data is organized in tables. Popular relational databases in the Java/Spring tech stack are MySQL, PostgreSQL, and Oracle.

2. Object-Relational Mapping (ORM) : ORM frameworks such as Hibernate or JPA make it easier to work with relational databases by converting objects from the application logic directly into database entries.

3. NoSQL databases : For special use cases, it may make sense to use a NoSQL database such as MongoDB or Cassandra. These databases do not work on the basis of tables, but store data in the form of document-based or key-value pairs.

4. Database migrations : Database migrations are an important part of database management in agile projects. Using tools like Flyway or Liquibase, developers can manage changes to the database schema as code and ensure that the databases are consistent across all environments.

5. Caching : To optimize application performance, it may be useful to use caching technologies such as Ehcache, Hazelcast or Redis. These technologies can be used to cache data and improve response times.

6. Database security : Another important aspect is database security. Developers can use various methods and technologies to increase database security, such as using encrypted connections (SSL/TLS), using password policies, and limiting access to databases.

7. Database optimization : Optimizing database performance is an important aspect in agile projects. Developers can use technologies such as indexes, partitioning or clustering to improve the performance of database queries.

“Frontend Frameworks” area:

1. Angular : An open-source framework from Google based on TypeScript that provides a rich collection of libraries and tools to build robust and scalable applications.

2. React : An open-source JavaScript framework developed by Facebook that is based on components and enables high code reusability.

3. Vue.js : An open-source framework based on JavaScript that provides a simple and flexible way to build user interfaces.

4. Bootstrap : A popular open-source CSS framework that provides a collection of pre-built components and styles to quickly create responsive user interfaces.

5. Material Design : A design system from Google that provides a rich collection of components and styles for creating engaging user interfaces.

“Cloud Platforms” area:

• Container orchestration platforms such as Kubernetes or Docker Swarm : These tools enable developers to build container-based applications that can run on cloud infrastructure. Kubernetes and Docker Swarm help automate container deployment, scaling, and management tasks.

• Cloud-based databases such as Amazon RDS or Google Cloud SQL: These services provide a managed database infrastructure in the cloud that developers can access and store data without having to worry about the underlying infrastructure.

• Cloud-native development tools such as AWS Lambda or Google Cloud Functions: These tools enable the creation of serverless applications that run in the cloud. Developers do not have to worry about managing servers and can focus on creating code.

• Cloud infrastructure platforms such as Amazon Web Services (AWS) or Google Cloud Platform (GCP): These platforms offer a variety of services that developers can use to create and run applications in the cloud. These include compute instances, storage services, network services, big data services and machine learning tools.

We also use various cloud-based development tools such as GitLab, Jenkins, CircleCI and TravisCI to create a continuous integration and continuous delivery pipeline for applications.

“Build Tools” section:

A full stack developer with the Java/Spring tech stack uses various build tools to automate build and deployment processes. Here are some of the most commonly used tools:

1. Maven : A build management tool used for building, testing and deploying Java applications. It uses XML configuration files to define the build processes.

2. Gradle : A build management tool that combines the flexibility of Ant with the simplicity of Maven. It uses Groovy scripts as build definitions and can manage Java and non-Java projects.

3. Jenkins : A continuous integration tool used for automating build, test, and deployment processes. It can be integrated with other tools like Maven and Gradle to automate the build processes.

4. Docker : An open-source container virtualization platform. Docker containers can be used to run applications and their dependencies in an isolated environment. Docker containers can be easily deployed and scaled.

5. Kubernetes : An open-source container orchestration platform used for managing Docker containers. It provides features such as auto-scaling, load balancing, and rollback.

6. Git : A version control system used for storing and managing code and other files. Git is one of the most widely used version control systems in software development.

7. GitHub : An online platform for version control and collaboration on software projects. It offers features such as pull requests, issues, and wikis that facilitate collaboration and communication between developers.

“Continuous Integration and Deployment (CI/CD)“ area?

1. Continuous Integration (CI) : Code changes are automatically integrated into a common code base and tested in order to identify potential conflicts and errors at an early stage. There are various tools for this, such as Jenkins or Travis CI.

2. Continuous Delivery (CD) : This automates the process of providing software in order to make the delivery of releases quick and reliable. There are also various tools for this, such as Ansible or Puppet.

3. Container technologies : Containers (e.g. Docker) allow applications and services to run in an isolated environment to manage dependencies and increase portability.

4. Cloud platforms : Cloud platforms such as Amazon Web Services (AWS) or Microsoft Azure offer opportunities to automate and scale CI/CD processes.

5. Configuration management: Tools such as Ansible or Chef make it possible to manage the configuration of servers and infrastructure automatically and scalably.

6. Monitoring and logging : For a successful CI/CD pipeline, it is important to continuously monitor and log the performance of the application and the quality of the code. There are various tools for this, such as Grafana or Kibana.

area of ​​“DevOps practices”?

• Configuration management tools such as Ansible, Chef or Puppet to automate and standardize the configuration of servers and applications

• Docker and Kubernetes for containerizing applications and managing containers in the cloud

• Automated testing and deployment pipelines with Jenkins, Travis CI or GitLab CI to ensure application quality and enable rapid releases

• Logging and monitoring tools such as ELK stack (Elasticsearch, Logstash and Kibana) or Prometheus and Grafana to gain insights into the status of applications and underlying infrastructure and to quickly identify and resolve issues

• Infrastructure-as-Code tools such as Terraform or CloudFormation to automate and manage infrastructure components such as servers, databases or networks.

These tools and technologies help us accelerate software development, improve quality, and facilitate application delivery by reducing manual effort and improving control over the process.

Working method:

Our developers prefer to work on a detailed, specified basis to ensure they know exactly what requirements need to be met to complete the project on time and within budget.

We attach great importance to ensuring that our developers can work on their tasks without interruption in order to achieve results quickly and effectively.

Therefore, they do not attend regular meetings or dailies of the client and can concentrate fully on the implementation of your projects.

Remote work:

We work completely remotely in our office.

But don't worry, we will still work closely with you to ensure that all your needs and requirements are met.

Customer Support:

We place particular emphasis on mutual trust when working together. That's why we ensure that our developers receive regular security training and are up to date with the latest technology. This way, you get the best possible solutions for your requirements.

We are available at all times and are happy to answer your questions and help you solve problems.

Our pricing is transparent and fair.

The price for our offer is 89.00 EUR for one developer hour including VAT.

We work on a project basis.

We look forward to working with you and helping you develop your web applications quickly and efficiently.

Please contact us immediately, free of charge and without obligation!

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To commission

You can now book developer hours directly via this link and get started on your project right away!

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To commission

You can now book developer hours directly via this link and get started on your project right away!

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