Middle Java Software Engineer

What project we have for you

About Client:

Our client is Ukrainian telecommunication operator providing mobile communication and data services based on high-speed Internet. The company offers convenient and beneficial tariffs and services for users of smart devices.

Project description:

Development and support of the in-house CRM system used for telecom business. The CRM system is integrated with different OSS&BSS systems such as billing system, business process management etc.

What you will do

Responsibilities:

• Working as part of the agile team, cooperating with other BE&FE developers, testers, PO and BAs.
• Design, develop, test, and maintain Java-based applications and software components
• Perform the post release support. Troubleshoot and debug issues in application.
• Write clean, efficient, and well-documented code. Continuously improve application performance, scalability, and reliability
• Stay up-to-date with emerging trends and technologies in Java development

What you need for this

Requirements:

Java Development

• Confident knowledge of Java 11+ (Streams, Lambdas, Optional).
• Understanding of OOP principles, SOLID, DRY, and KISS.

Spring Framework Ecosystem

• Experience with Spring Boot, Spring Data, Spring Security, Spring Core.
• Use of ORM.

Microservices Architecture

• Hands-on experience with microservices development.
• Understanding of REST, inter-service communication, fault tolerance, and service discovery.
• gRPC (Protobuf) and SOAP are a plus.

Message Brokers

• Experience with RabbitMQ (queues, message processing, exchange types).

Databases

• Strong knowledge of SQL, particularly PostgreSQL.
• Understanding of transactions, indexes, and query optimization.
• Basic knowledge of NoSQL is a plus.

DevOps & CI/CD

• Experience with Git, GitLab CI.
• Project build with Gradle.

Testing

• Unit testing with JUnit and Mockito.
• Understanding of integration testing.

Containerization

• Docker (creating images, working with containers).
• Basic understanding of Kubernetes is a plus.

Web Development (optional)

• Basic knowledge of HTML, CSS, JavaScript.
• Understanding of how browsers work, HTTP, DOM.
• Knowledge of Angular, React, or Vue 3 is a plus.

Security & Authentication

• Experience integrating OAuth (authentication via third-party services).
• Working with LDAP (Lightweight Directory Access Protocol) for centralized access control.

Nice to have:

• Basic knowledge at web-based front-end technologies such as JS (Angular), HTML, CSS