Senior Full-Stack Java Engineer (f/m/x) - German-speaking

Avenga Water Well Service, LLC; Nordrhein-Westfalen; Vor Ort; EUR 90.000 - 130.000; Vollzeit

Zusammenfassung

Avenga seeks a Senior Full-Stack Java Engineer (f/m/x), German-speaking, to lead complex development and modernization projects for a major financial services client in Germany. You will blend hands-on Java work with architecture, migration, testing, DevOps, and technical ownership in a highly regulated enterprise.

You will collaborate with Product Owners, Analysts, and Subsystem Owners to deliver scalable, secure software solutions, bridging business needs with robust engineering in a

Qualifikationen

• 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.

Aufgaben

• 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.

Kenntnisse

Java

Spring Boot

Microservices

REST APIs

Software architecture

Distributed systems

Banking domain

PostgreSQL

CI/CD

DevOps

Cloud

LLMs in development

Clean Code

German + English

Jobbeschreibung

Senior Full-Stack Java Engineer (f/m/x) - German-speaking

Build technologies that matter

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

Locations Germany Remote status Fully Remote Technology Java Seniority Senior-level

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.