Senior Java Backend Engineer Scalable Microservices & CI/CD

AlmavivA de Belgique; Den Haag; On-site; EUR 90,000 - 130,000; Full time

Job summary

AlmavivA de Belgique seeks a senior Java backend developer to design and implement enterprise-scale microservices and REST APIs. You will contribute to secure authentication, CI/CD pipelines, and robust testing while aligning with Scrum practices in a multinational setting.

The role requires deep experience with Java frameworks (Spring Boot, Vert.X), messaging systems, NiFi, Kafka, and cloud-native deployment in Kubernetes/Docker, along with solid SQL Server skills.

Qualifications

• More than 15 years in IT.
• Bachelor or Master Degree.
• More than 9 years of experience in Java Backend Development using REST APIs, RDBMs, microservices, CI/CD pipelines and BDD.
• Experience in more than two production-ready solutions written in Java with Vert.X.
• Experience in more than two production-ready solutions using Apache NiFi 2.0.
• Experience in at least one production-ready solution using Tensorflow and Tensorflow Java bindings.
• Experience in more than one production-ready projects with OAUTH standard.
• More than two years of experience in an international/multi-cultural environment.
• More than three years of experience in an Agile/Scrum.
• Sound knowledge of Apache Camel including Enterprise Integration patterns including Messaging Patterns involving popular messaging systems (ActiveMQ or RabbitMQ).
• Sound knowledge of Java and Experience with the following Java frameworks, Spring Boot 3, Vert.X.
• Sound knowledge of the design and development of back-end components (REST APIs, integrations, micro-services).
• Sound knowledge on how to write unit test for Java.
• Good knowledge of software development methodologies (e.g. AGILE).
• Good knowledge of programming on SQL Server databases with TSQL.
• Good knowledge of OOP paradigms and SOLID principles.
• Good knowledge of OAUTH standard. application design.
• Capable to be part of an Agile Team implementing Scrum (team worker, easy going, good communication capabilities).
• Good knowledge of Kafka Stream architecture.

Responsibilities

• Contributing to the improvement of the development and build process.
• Designing and developing production grade, enterprise level systems that make extensive use of messaging and microservices.
• Participating in the Java implementation of a micro-services solution, writing backend code in a reliable, fast, scalable, and secure way, satisfying requirements and service level agreements.
• Writing OAUTH authentication mechanisms. Implementing validation mechanisms as unit and integration tests.
• Assistance with deployment and configuration of the system. Setup CI/CD pipelines. Familiarity with Kubernetes/Docker, is assumed.
• Working comfortably within a team. Following Scrum procedures and disciplines. Estimating the work to be done upon request.
• Writing technical documentation. Account for secure coding practices, as well as logging and auditing features.
• Communicating in a clean, concise way, not only to peers but to upper layers when needed.
• Hands on experience with Git following pull request procedure. Writing clean, secure and high-quality code.

Skills

Java backend development

REST APIs

Microservices

CI/CD pipelines

BDD

Agile/Scrum

OOP

SOLID principles

Kafka Streams

Spring Boot

Vert.X

OAuth

Docker

Kubernetes

Apache Camel

TensorFlow bindings

Apache NiFi

SQL Server / T-SQL

Education

Bachelor or Master Degree

Tools

Kubernetes

Docker

Apache NiFi

TensorFlow Java bindings

OAuth

Apache Camel

Spring Boot 3

Vert.X

SQL Server

Job description

AlmavivA de Belgique seeks a senior Java backend developer to design and implement enterprise-scale microservices and REST APIs. You will contribute to secure authentication, CI/CD pipelines, and robust testing while aligning with Scrum practices in a multinational setting.

The role requires deep experience with Java frameworks (Spring Boot, Vert.X), messaging systems, NiFi, Kafka, and cloud-native deployment in Kubernetes/Docker, along with solid SQL Server skills.