Senior Java Backend Engineer – Freelance (Barcelona, Hybrid)
Location
barcelona, cataluña
Job Type
Full-time
Category
Informática y tecnología
Posted
May 23, 2026
Overview
We are looking for a Senior Java Backend Engineer to join a long-term freelance project in Barcelona (hybrid: 3 days onsite, 2 remote).
This role is part of a strategic transformation initiative in the financial sector, modernizing data management systems with cloud-native technologies and agile methodologies.
Responsibilities
- Build and optimize back-end services with Java 8+/11/21, Spring Boot, and Microservices.
- Translate complex business needs into scalable solutions.
- Improve GUI functionality in collaboration with frontend teams.
- Implement best practices in security, compliance, and governance.
- Work with Apache Kafka and Apache Spark for real-time data pipelines.
- Deploy and manage applications in OpenShift and Azure with Kubernetes and Docker.
- Collaborate in agile cross-functional teams (SCRUM, SAFe).
- Provide technical leadership and mentor junior developers. <...