Senior Java Developer

• Contribute to the improvement of the development and build process
• Design and develop production grade, enterprise level systems that make extensive use of messaging and microservices.
• Participate in the Java implementation of applications and micro-services involving integration with search engines, being able to write backend code in a reliable, fast, scalable, and secure way, satisfying requirements and service level agreements following both a functional and reactive programming approach.
• Write OAUTH authentication mechanisms. Implement validation mechanisms as unit and integration tests.
• Assist with deployment and configuration of the system. Setup CI/CD pipelines. Familiarity with Kubernetes/Docker is assumed.
• Follow Scrum procedures and disciplines. Estimate the work to be done upon request.
• Write technical documentation. Account for secure coding practices, as well as logging and auditing features.
• Work with Git following pull request procedure.
• Write clean, secure and high-quality code.

Mandatory:

Bachelor's degree plus 9 years of relevant experience.

Working knowledge of English (B2 or higher)

Minimum of 9 years of professional experience with OOP paradigms and SOLID principles using Java 11 (or higher), and experience with the most common Java frameworks:

• Spring
• Spring Boot

Minimum of 2 years of professional experience working with SOAP and GRPC web servers and clients

Minimum of 2 years of professional experience with the JavaScript front-end frameworks:

• Vue.js (React is optional)
• jQuery

Experience and display of the prerequisites of working in an Agile Team implementing Scrum

Good knowledge of application development environments, like:

• Java 21+
• IntelliJ IDEA (or Eclipse)
• VS Code
• Maven
• Git

Good knowledge of Enterprise Integration methodologies and patterns:

• Proficiency in modelling an EIP system using classical EIP patterns and diagrams

Good knowledge of the design and development of components like REST APIs, integrations, and micro-services) covering proficiency in:

• using REST-based frameworks like Spring MVC, as well as accessory tools like Postman
• building SOAP and GRPC web servers and clients in the Java/Spring context

Good knowledge of relational databases, Microsoft SQL Server

• Ability to use Spring Data and Hibernate

Good knowledge of Agile software development methodologies:

• Scrum
• Kanban

Good knowledge of OOP paradigms and SOLID principles using Java 11 (or higher) and good knowledge with most common Java frameworks:

• Spring
• Spring Boot 3+
• Spring Batch

Good knowledge of a Java EIP framework like

• Apache Camel
• Spring Integration

Good knowledge of container technology

• Docker
• Kubernetes
• Rancher

Good knowledge of messaging systems, including:

• ActiveMQ
• Kafka

Good Knowledge of CD/CI systems

• TFS/Azure DevOps

Good knowledge of front-end web application development:

• Javascript
• JSP
• JQuery

Good knowledge of the JavaScript front-end frameworks: Vue.js

Good knowledge of NoSQL databases like ElasticSearch

Good knowledge of software development methodologies (e.g. AGILE)

Good knowledge and display of the prerequisites of working in an Agile Team implementing Scrum (e.g. team teamwork, clear communication)

Desirable:

• Ability to participate in multi-lingual meetings, ease of communication
• Capability of integration in an international/multi-cultural environment
• Ability to cope with fast-changing technologies used in application development
• A minimum of 2 years of experience in Software Development for cloud native architectures
• Participation in a minimum of 2 projects involving cloud native development

Arηs is a fully independent group of companies specialized in managing complex IT projects and systems for large organisations, focusing on state-of-the-art software development, business intelligence and infrastructure services.

We are composed of 13 entities across 6 countries that are unified by the Arηs Group, with more than 1750 consultants.

This corporate structure enables us to respond quickly to market changes and customer requests, and to communicate and make decisions without layers of bureaucracy.

Our success can be attributed to the synergy among our nine complementary entities, combined with our methodologies, which are based on the Rational Unified Process (RUP) and the Scrum agile software development framework.

Established in 2016, the Greek entity Arηs Developments Hellas aims to extend Arηs Group activities dedicated to the European market providing high-quality services in Software Development, covering the entire application development lifecycle: starting with user requirements, business process redesign and specifications, to continue with development, testing and application maintenance.