Senior Backend Engineer – Java/Spring, AI-Powered, Hybrid

Irium; Lisboa; Hybrid; EUR 22,000 - 26,000; Full time

Benefits offered by this job

Private health insurance

Flexible compensation

Professional development opportunities

Self-learning trainings

Job summary

IREUM is seeking an experienced Backend Developer (Java / Spring Boot) to join an innovative technology project in Lisbon. The role focuses on building scalable backend services, REST APIs and robust data layer integrations while applying modern engineering practices.

The ideal candidate will have 5+ years in backend development, strong Java/Spring Boot expertise, and hands-on experience with Docker/Kubernetes and Kafka.

Qualifications

• Minimum 5 years of professional experience in backend software development.
• Strong hands-on experience with Java 17 or higher, Spring Boot and Hibernate.
• Experience designing, developing and integrating REST APIs.
• Solid knowledge of relational and NoSQL databases, including Oracle, PostgreSQL and MongoDB.
• Experience with Git and version control best practices.
• Knowledge of messaging systems, particularly Apache Kafka.
• Experience with Docker and Kubernetes.
• Familiarity with Scrum and Agile methodologies.
• Experience developing, maintaining and improving enterprise applications.
• Ability to produce technical documentation and apply software engineering best practices.
• Experience mentoring and supporting junior developers, assigning tasks and reviewing deliverables.
• Strong communication, analytical thinking, autonomy, proactivity and teamwork skills.
• Interest in using AI-assisted development tools to improve software engineering processes.

Responsibilities

• Develop, maintain and optimize scalable backend applications.
• Identify and implement software development best practices and technical improvements.
• Adopt AI-powered development tools to improve productivity and code quality.
• Produce and maintain technical documentation.
• Support junior developers through task specification, technical guidance and deliverable validation.
• Collaborate with production support teams, ensuring effective knowledge transfer.
• Work closely with Product Owners to understand business requirements and deliver technical solutions.
• Contribute to code quality, application reliability and continuous improvement.

Skills

Java 17+

Spring Boot

Hibernate

REST APIs

Relational & NoSQL DBs

Git

Kafka

Docker

Kubernetes

Scrum/Agile

Documentation

Mentoring juniors

Communication/Analytical

AI-assisted tools interest

Tools

Docker

Kubernetes

Oracle

PostgreSQL

MongoDB

Git

Kafka

Job description

IREUM is seeking an experienced Backend Developer (Java / Spring Boot) to join an innovative technology project in Lisbon. The role focuses on building scalable backend services, REST APIs and robust data layer integrations while applying modern engineering practices.

The ideal candidate will have 5+ years in backend development, strong Java/Spring Boot expertise, and hands-on experience with Docker/Kubernetes and Kafka.