Senior Backend Engineer (Kotlin/Java) - Remote PT

Aubay Portugal; Lisboa; Remote; EUR 70,000 - 100,000; Full time

Benefits offered by this job

Health insurance

Career growth

Training academy

Mental health platform

Remote work in Portugal

Job summary

Aubay Portugal is seeking an experienced Backend Developer to join our Portugal team and contribute to robust backend systems using Kotlin and Java. You will implement high-performance Spring Boot solutions, work with PostgreSQL, RabbitMQ or Kafka, and contribute to microservices architecture.

Knowledge of Redis, OpenSearch, MongoDB and AI-related technologies is valued. English at B2 level or higher and eligibility to work in Portugal are required.

Qualifications

• 8–10 years of backend development experience.
• Strong Kotlin and Java programming skills.
• Proficient with Spring Boot, PostgreSQL and messaging (RabbitMQ/Kafka).
• Experience with microservices, Redis, OpenSearch and MongoDB valued.
• Knowledge of AI tech (Vertex AI, Python, ADK) is a plus.
• English level B2 or higher and work permit for Portugal.

Responsibilities

• Develop and maintain robust backend systems using Kotlin and Java.
• Implement high-performance, scalable solutions with Spring Boot.
• Work with relational databases and messaging systems.
• Contribute to microservices architecture and design.
• Potential involvement in AI agent development.

Skills

Kotlin

Java

English B2

Microservices

Tools

Spring Boot

PostgreSQL

RabbitMQ

Kafka

Redis

OpenSearch

MongoDB

Job description

Aubay Portugal is seeking an experienced Backend Developer to join our Portugal team and contribute to robust backend systems using Kotlin and Java. You will implement high-performance Spring Boot solutions, work with PostgreSQL, RabbitMQ or Kafka, and contribute to microservices architecture.

Knowledge of Redis, OpenSearch, MongoDB and AI-related technologies is valued. English at B2 level or higher and eligibility to work in Portugal are required.