JAVA DEVELOPER, HIBRIDO

Java Developer
Please apply with English CV

Summary
Location: Barcelona (Hybrid)
Day Rate: Negotiable
Duration: Until end of 2025
Availability: ASAP

About the Client
My client is the air transport industrys IT provider, delivering solutions for airlines,
airports, aircraft and governments. Their technology powers more seamless, safe and
sustainable air travel.

They are looking to hire an experienced Java Developer on a freelance/contract basis until
the end of 2025.

About the Role
Working within the Aircraft division you will join a team of developers working on
solutions focused on fuel efficiency and sustainability for Airlines.

Being part of an international team, you will work on the development of a product which
allows Airlines to achieve efficiencies with regards to Aircraft fuel, working with flight data
to optimise flight trajectory.

You will lead the migration of our legacy Java application to Spring Boot, modernizing its
architecture for improved scalability and performance.

Key Duties
Lead the migration of our legacy Java application to Spring Boot, modernizing its
architecture for improved scalability, maintainability, and performance.
Collaborate with the Machine Learning team to seamlessly integrate predictive
models into our system, ensuring they function efficiently and enhance decisionmaking processes.
Architect, design, and develop high-performance, scalable applications using Java
and Spring Boot while ensuring adherence to best practices and coding
standards.
Optimize Elasticsearch usage by designing efficient indexing strategies, enhancing
query performance, and ensuring scalability.
Work closely with cross-functional teams, including product managers, architects,
and data scientists, to implement technical solutions that align with business
goals.
Conduct code reviews and mentor junior developers, fostering a culture of
knowledge sharing and continuous improvement.
Troubleshoot and resolve complex technical issues, ensuring high availability,
reliability, and security of the system.
Stay updated on emerging technologies and contribute to the continuous
improvement of development processes and best practices.
Participate in requirement analysis, system design, and effort estimation to
ensure the successful delivery of projects.

What we are looking for
Required Skills:
Bachelor s degree in computer science, software engineering, or related field.
Proficiency in Java 8+, Spring Framework (Spring Boot, Spring MVC), Hibernate,
Elastic Search, Junit, Gradle / Maven.
Experience with microservices architecture and RESTful APIs.
Strong understanding of design patterns, SOLID principles, and clean coding
practices
Experience with Elasticsearch, including indexing, querying, and optimizing search
performance. Familiarity with relational databases like PostgreSQL, MySQL, or
Oracle and NoSQL databases such as MongoDB is a plus.
Knowledge of Docker, Kubernetes, and CI/CD pipelines.
Experience with message brokers (Kafka, RabbitMQ).
Experience with Flyway (or Liquibase) is a plus.
Prior experience migrating legacy applications and working on large-scale,
distributed systems.

Candidates must be willing to work 3 days on site in Barcelona, 2 days working
remotely.

java, spring,

java, spring,