Overview Join Plexus Tech. We are looking for a programmer with 3 years of experience in Java development and familiarity with data analysis.
Responsibilities SQL query optimization
Requirements General Requirements
Vocational training in Computer Science or higher
Minimum 3 years experience in a similar position
Ability to work in a team, with a willingness to learn.
Intermediate English (Highly desirable).
Programming Language Java (Java SE and EE)
Framework Knowledge Spring / Spring Boot
Hibernate / JPA
Maven / Gradle
Databases Relational: PostgreSQL, Oracle
Schema design and normalization
SQL query optimization
Advanced SQL (joins, subqueries, CTEs, window functions)
Basic knowledge of statistics
Tools DBeaver
Data Analysis & ETL Extract, Transform, Load (ETL) knowledge




BI Tools Pentaho
Apache NiFi
Complementary Technologies Git / GitHub / GitLab
RESTful APIs and web services
Testing: JUnit, Mockito
Technical documentation (Swagger, OpenAPI)
Agile methodologies (Scrum, Kanban)
Benefits Hybrid model: work from any of our 24 work centers in Spain, from home, or a combination.
Collaborative environment within the company.
Work with leading professionals.
Access to ongoing training.
Professional development opportunities.
Adaptable compensation with health insurance, meal vouchers, childcare, and transportation.
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📌 Java Developer + Data Analysis (Madrid)
🏢 Plexus Tech
📍 Madrid