Java Developer (m/f/d)

Siemens España; Amadora; Hybrid; EUR 60,000 - 90,000; Full time

Benefits offered by this job

Belong & Innovate

Hybrid model & home office budget

Health insurance

Learning platforms & mentoring

Sustainability & volunteer initiatives

Job summary

Siemens AG Portugal Tech Hub in Lisbon/Amadora area is seeking an experienced Java Developer to solve challenging technical problems, understand complex applications, and turn existing solutions into more maintainable, reliable, and secure software.

You will join an international project environment where you’ll have the opportunity to take ownership, improve established applications, tackle technical debt, and help shape their future evolution.

Qualifications

• 4+ years of professional Java development experience, backend focus.
• Strong knowledge of Java EE / J2EE applications and architectures.
• Experience maintaining and refactoring legacy applications.
• Proficient with WebLogic and JBoss configuration, troubleshooting, and optimization.
• Solid SQL and PL/SQL skills, with Oracle and PostgreSQL.
• Good understanding of TCP/IP communication and system integration.
• Experience with SVN, Ant, Eclipse, and MagicDraw.
• Basic Windows administration and troubleshooting knowledge.
• English is mandatory; occasional travel may be required.

Responsibilities

• Develop, maintain, and improve business-critical software solutions.
• Understand existing applications, challenge the status quo, and identify modernization opportunities.
• Refactor legacy components while preserving stability and business continuity.
• Investigate complex issues, identify root causes, and implement sustainable solutions.
• Ensure high standards for software quality, maintainability, security, and documentation.
• Support integration, deployment, and operational readiness across the application lifecycle.
• Translate business and functional needs into effective software solutions.
• Collaborate with developers, testers, architects, and project stakeholders across an international environment.
• Take ownership of topics and proactively communicate progress, dependencies, and risks.

Skills

Java

Java EE

SQL

WebLogic

JBoss

Oracle SQL

PostgreSQL

Legacy refactoring

Team collaboration

English language

Education

Bachelor's degree in Computer Science or related field

Tools

WebLogic

JBoss

SVN

Ant

Eclipse

MagicDraw

Oracle Database

PostgreSQL

Job description

At Siemens, we build technology solutions to shape the world we live in. We transform industries and societies by combining the real and digital worlds. With over 300.000 of the world’s most forward-thinking minds and the power of a presence in more than 190 countries, we make a truly global impact.

About Portugal Tech Hub

We take on challenges to make life easier, safer, and more sustainable for us and generations to come. We bring value to the business digitalization transition, from Portugal to the world, in areas such as Artificial Intelligence, Analytics & Business Intelligence, Application Lifecycle Management, Cybersecurity, IT Infrastructure Management, IT Project & Service Management, IT Strategy, User Experience, and many more.

With a decade of history and around 1.600 experts, the Portugal Tech Hub is the home of the new technologists – Dream Builders, Impact Creators & Future Makers.

Are you ready to be part of the change? Come join us!

Your mission will be…

We’re looking for an experienced Java Developer who enjoys solving challenging technical problems, understanding complex applications, and turning existing solutions into more maintainable, reliable, and secure software.

You’ll join an international project environment where your contribution goes beyond writing code. You’ll have the opportunity to take ownership, improve established applications, tackle technical debt, and help shape their future evolution.

What you’ll do

• Develop, maintain, and continuously improve business-critical software solutions.
• Understand existing applications, challenge the status quo, and identify opportunities for modernization and improvement.
• Refactor legacy components while protecting stability and business continuity.
• Investigate complex issues, identify root causes, and implement sustainable solutions.
• Ensure high standards for software quality, maintainability, security, and documentation.
• Support integration, deployment, and operational readiness across the application lifecycle.
• Translate business and functional needs into effective software solutions.
• Collaborate closely with developers, testers, architects, and project stakeholders across an international environment.
• Take ownership of your topics and proactively communicate progress, dependencies, and risks.

We are looking for someone with…

• Bachelor’s degree in Computer Science, Software Engineering, IT, Engineering, or a comparable technical field, or equivalent relevant professional experience.
• 4+ years of professional Java development experience, with a strong backend focus.
• Strong knowledge of Java EE / J2EE applications and architectures.
• Experience maintaining and refactoring legacy applications.
• Strong knowledge of WebLogic and JBoss, including configuration, troubleshooting, and optimization.
• Solid SQL and PL/SQL skills, particularly with Oracle Database and PostgreSQL.
• Good understanding of TCP/IP communication and system integration.
• Experience with Subversion (SVN), Ant, Eclipse, and MagicDraw.
• Basic Windows administration and troubleshooting knowledge.
• Experience with MES or manufacturing environments is a plus.
• English is mandatory, as you’ll work and communicate in an international project environment.
• Occasional travel may be required for project activities, workshops, or team collaboration.

What makes you a great fit

You’re someone who enjoys digging into complex systems and understanding how things really work. You combine technical expertise with ownership, curiosity, attention to detail, and a strong quality and security mindset.

You’re comfortable working autonomously, but you also recognize that great software is built through collaboration and knowledge sharing.

What We Offer

• Belong & Innovate: Work in diverse teams where every idea matters and innovation grows through collaboration and trust.
• Flexibility that Works: Hybrid model, flexible hours, and a home office budget — because balance fuels performance.
• Health & Well-being: Comprehensive health insurance, mental health support, and active sports communities to keep you feeling your best.
• Grow Without Limits: Access world-class learning platforms, mentoring, and continuous development opportunities.
• Purpose & Perks: Contribute to sustainability and volunteer initiatives, enjoy partner discounts, and take advantage of our convenient shuttle service.

Siemens is deeply committed to fostering a diverse and inclusive environment. We are proud to be an equal opportunity employer and strongly encourage applications from a wide array of talented individuals!