Java Developer

Role Overview We are looking for a Senior Java Developer with solid experience in enterprise environments to join a team focused on maintaining, evolving, and integrating critical applications. This role involves working primarily with legacy systems, with a strong emphasis on security and identity integration. Key Responsibilities Develop and maintain backend applications using Java

Implement and enhance flows using Spring Framework (with a focus on Spring Webflow)

Design and integrate APIs

Develop and maintain business logic within the database (Oracle / PL/SQL)

Integrate applications with authentication and authorization systems (SSO)

Perform application deployments and provide production support

Troubleshoot and resolve application issues

Collaborate with cross-functional teams (development, infrastructure, and security)

Mandatory Requirements Back-end & Framework Strong experience in Java development (5+ years or 4+ years with strong seniority)

Solid knowledge of Spring Framework

Experience with Spring Webflow (highly valued)

Experience in API development and integration

Database Proven experience with Oracle and PL/SQL

Development and maintenance of complex stored procedures

Business logic implementation at database level

Security & Identity Hands-on experience with Single Sign-On (SSO)

Practical knowledge of protocols: OAuth2

OpenID Connect

SAML

Experience integrating with Identity Providers

Experience with platforms such as Okta or Microsoft Entra ID (Azure AD)

Environment & Operations Experience with Linux/Unix environments

Experience with application servers: Apache Tomcat

Apache HTTP Server

Ability to perform deployments and troubleshooting

Functional Skills Experience working in enterprise and legacy environments

Strong problem-solving and analytical skills

Experience maintaining and enhancing existing applications

Nice to Have Tech Stack Experience with Spring Boot

Knowledge of JSP

Frontend knowledge: JavaScript, jQuery, Bootstrap

Angular, Vue, or Ionic

Security Knowledge of SSL/TLS

Experience with digital certificates

Familiarity with keystores and truststores

Basic understanding of encryption (AES, RSA, SHA)

Context & Experience Previous experience in banking or insurance

Experience in complex enterprise environments

Experience with SSO migration (local to centralized)

Additional Skills Ability to adapt to corporate standards

Strong communication and teamwork skills

Experience collaborating with multiple technical teams

Work Model Hybrid model (up to 3 days per week on-site in Lisbon)

What can you expect from us? Mind-blowing workplace culture. You will be integrated in a professional, dynamic and collaborative team. 100% Remote opportunities We want you to have the flexibility to work where you feel most comfortable and productive. International Career You can expect professional growth and to be connect with the world.

We are represented in Portugal, Belgium, Luxembourg, and Denmark.

And with projects in many other countries: Netherlands, Luxembourg, Singapore and in the United States of America (and a lot more is coming…)

Extra Benefits & Perks If you wish to work with us and you are outside European Union (good news…) we are a Tech Visa Company, We will help! As a plus, we provide Health and Life Insurance.