Senior Full-Stack Java Engineer (f/m/x) - German-speaking
First seen by Alion on Aug 28, 2026. Avenga scores B on the Alion truth index.
This is us
At Avenga, we believe that human creativity empowers technology that matters. Operating globally, our 6000+ specialists provide a full spectrum of services, including business and tech advisory, enterprise solutions, CX, UX and Ul design, managed services, product development, and software development.
This is the job
As a Senior Full-Stack Java Developer (f/m/x) at Avenga, you will work on complex software development and modernization initiatives for a major financial services customer in Germany.
You will join a technically demanding banking environment focused on the re-engineering and further development of enterprise applications. Your role will combine hands-on Java development with software architecture, migration, testing, DevOps, and technical ownership.
You will work closely with Product Owners, Business Analysts, Subsystem Owners and other technical stakeholders, helping translate business requirements into reliable, secure and scalable software solutions.
The role requires strong experience in financial services, excellent German communication skills, and the ability to work independently in a highly regulated enterprise environment.
This is you
You are a Senior Full-Stack Java Developer with strong experience in enterprise Java development and a solid understanding of software architecture and distributed systems. You are comfortable taking technical ownership, working with business and technical stakeholders, and contributing to complex modernization and migration initiatives.
You bring:
5+ years of professional experience as a Full-Stack Java Developer in Java-based development projects
Strong hands-on expertise in Java, Spring Boot, Microservices and REST APIs
Strong experience with software architecture, distributed systems and object-oriented data modelling
Professional experience in banking, financial services, securities or another regulated financial environment
Strong knowledge of connecting Java applications to relational databases, ideally PostgreSQL
Experience with application modernization, re-engineering and migration projects
Strong experience with automated and manual testing, test automation and quality assurance
Strong knowledge of CI/CD, DevOps, version control, build and release management
Experience with private cloud environments, cloud migration, security, compliance and governance
Practical experience with Large Language Models and their application in software development
Experience with Clean Code, software design patterns, code reviews and secure coding practices
Fluent German and English skills, both written and spoken
This is your role
In this role, you will take technical ownership of software development within your area of expertise, contributing to both hands-on implementation and the technological direction of the solution.
Your responsibilities will include:
Designing programming specifications and supporting the re-engineering of existing enterprise applications
Designing and implementing high-quality Java and Spring Boot solutions
Taking responsibility for the technical architecture and further development of the system
Developing scalable, secure and maintainable microservices and REST APIs
Performing component and integration testing and developing automated test scenarios
Further developing CI/CD, DevOps and test automation processes
Contributing to application modernization and migration activities
Conducting code reviews, pair programming and promoting Clean Code and engineering best practices
Creating and maintaining technical and operational documentation
Working closely with Product Owners, Business Analysts and Subsystem Owners to translate requirements into technical solutions
Mentoring developers and supporting knowledge sharing within the team
Supporting release and test management activities and ensuring compliance with the customer's engineering, quality and security standards
Structuring complex technical challenges and developing effective solutions in a regulated banking environment
What awaits you at Avenga?
At Avenga, everyone matters. We provide equal opportunities in recruitment, career development, and leadership, regardless of race, ethnicity, gender identity, sexual orientation, disability, age, religion, or any other characteristic. We are committed to fostering a work environment where our diverse community of employees, candidates, and business partners actively shapes our growth. By bringing together people from different backgrounds and experiences, we build a workplace where everyone feels free to be themselves while honoring the boundaries of others.