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Aderen operates as an IT consulting and staffing agency that provides freelance professionals to third-party clients, acting as an intermediary rather than the direct employer.

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A
Posted 1mo ago

Senior Java Developer

ADEREN
View all open roles
Madrid, Madrid, Spain
€200-€240/dayHybridFull Time, Contract
Responsibilities
  • developing software
  • customizing platform
  • writing tests
Requirements
  • 3+ years Java development (Spring Boot)
  • Knowledge of Spring Security, Maven
  • DBMS/SQL
  • RESTful services
  • JUnit/Mockito
  • Git/GitLab
  • OAuth2/OIDC
  • JSON/XML, and fluent English
Technical tools mentioned
JavaJEESpring BootSpring SecurityMavenDBMSSQLRESTfulJUnitMockitoGitGitLabJSONXMLOAuth 2.0OIDCFlowable

Job description

Job Information

Title: Senior Java Developer
Job Type: Freelance Full time
Company: ADEREN
Country: Spain
Location: Madrid
Published: 15/10/2025
ID de Oferta de empleo: 2295
Duración del proyecto meses: Largo Plazo
Sector: Tecnologia
Prioridad Incorporación: Crítica
Tarifa Candidato: 200-240
Salario: Largo Plazo
Ingresos por puesto: US$0.00
Area de Conocimiento: JEE
Habilidades: English;JEE;SPRING
Idiomas: Español;Ingles
Ciudad: Madrid
Estado/provincia: Madrid
Código postal: 28001




SEEKING:  Senior Java Developer

 

We are looking for a Senior Java Developer with At least 3+ years of experience in software development with Java (especially Spring Boot)

 

The Project: To introduce Vanilla Flowable as a BPM Platform and build a product to the users so that Business Units can later create software for different purposes and business needs. The goal of the team is to customize Flowable Platform, which is completely build in Spring Boot, to build a product that will later be used by business units.

 


EXPERIENCE, KNOWLEDGE & SKILLS (must have)

► 3+ years of experience in software development with Java (especially Spring Boot)
► Good knowledge of Spring Security
► Good knowledge of Maven
► Knowledge of DBMS, SQL knowledge
► Knowledge of web services (especially RESTful WS)
► Knowledge of JUnit test (Mockito)
► Good handling of Git (using GitLab)
► Ability to write readable, testable, and maintainable code using the clean code approach
► Understanding of OAuth 2.0 flow and OIDC. Understand how the process works.
► Ability to perform reverse engineering
► Very good handling of JSON/XML

 

 

 

LANGUAGE :

● Fluent English- (High Level)

 

 


WE OFFER: 

·         Full-time Freelance contract

·         Rate: Up to €240 per day + VAT (according to the experience provided)

·         Long-Term Project

·         Location: Madrid – Hybrid (3 days on site 2 days teleworking per week)

·         Desired start date: ASAP





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