Senior Software Developer – Tech Lead, Java, Spring, Jakarta EE

Jobtailor; Bonn; Vor Ort; EUR 90.000 - 130.000; Vollzeit

Zusammenfassung

Jobtailor in Bonn, Germany seeks a seasoned full-stack Java developer to work on sophisticated applications across frontend and backend. You will contribute to client projects, modernize existing systems, and design future-proof architectures.

Expect strong backend with Java/Spring, plus optional Kotlin or Python, frontend involvement, and experience with React or Angular. CI/CD, containerization, and cloud services are part of daily work; German and English communication are required.

Qualifikationen

• Several years of experience in full-stack development.
• Strong backend focus in Java, ideally Kotlin or Python.
• In-depth knowledge of modern Java development with Spring, Spring Boot and Spring Cloud.
• Solid experience with Jakarta EE and traditional enterprise landscapes.
• Knowledge of JBoss or WebSphere servers.
• Understanding of traditional vs modern Java architectures.
• Ideally experience in modernization projects or migrations.
• Frontend involvement and experience with React/Angular, JSF or PrimeFaces.
• CI/CD pipelines, containerization and cloud services.
• Strong self-organization, team spirit and problem solving.
• Ideal candidate may have project leadership experience.
• Native-level German and confident English communication.

Aufgaben

• Develop sophisticated Java and web applications across frontend and backend.
• Contribute expertise to client projects and create sustainable solutions.
• Analyze existing systems and identify modernization opportunities.
• Develop strategies for evolution of established applications.
• Transform architectures into modern, future-proof solutions.
• Apply Clean Code, TDD and DevOps practices.
• Assess technologies and trends for practical use.
• Analyze complex challenges and optimize solutions.
• Integrate legacy systems with modern tech.
• Collaborate closely with colleagues and teams.
• Provide technical consulting to clients and support evolution of architectures.

Kenntnisse

Java

Kotlin

Python

Spring Boot

Spring Cloud

Jakarta EE

CI/CD

Containerization

Cloud Services

Frontend Development

React

Angular

JSF

PrimeFaces

Tools

JBoss

WebSphere

Jobbeschreibung

• Develop sophisticated Java and web applications across the frontend and backend
• Contribute your expertise to client projects and develop sustainable solutions together with clients
• Analyze existing systems and identify opportunities for modernization
• Develop strategies for the effective evolution of established applications
• Transform existing applications and architectures into modern, future-proof solutions
• Apply Clean Code, Test-Driven Development, and DevOps practices
• Assess current technologies, architectures, and trends for their suitability and practical application
• Analyze complex technical challenges and optimize existing solutions
• Integrate legacy systems with modern technologies
• Work closely with colleagues and other teams
• Provide technical consulting to clients, challenge existing approaches, and support the sustainable evolution of applications and architectures

Requirements

• Several years of experience in full-stack development
• Strong backend focus in Java, ideally complemented by Kotlin or Python
• In-depth knowledge of modern Java development with Spring, particularly Spring Boot and Spring Cloud
• Solid experience with Jakarta EE and traditional enterprise application landscapes
• Knowledge of application servers such as JBoss or WebSphere
• Understanding of the differences and relationships between traditional and modern Java architectures
• Ideally, experience modernizing applications and systems or supporting migrations to new architectures
• Regular involvement in frontend development
• Ideally, experience with React or Angular, as well as JSF or PrimeFaces
• Experience with CI/CD pipelines, containerization, and cloud services
• Ability to understand complex system landscapes and design and implement new technical solutions
• Strong self-organization, team spirit, and outstanding problem-solving skills
• Ideally, experience in leading projects or parts of projects
• Native-level German
• Confident communication skills in English

Core Competencies

Demonstrates expertise in Full-Stack Development with a strong focus on Java and modern frameworks, alongside the ability to analyze and modernize complex systems. Proficient in applying Clean Code principles, Test-Driven Development, and DevOps practices while effectively collaborating with clients and teams.

Highest-signal resume keywords

• Full-Stack Development
• Java Development with Spring
• CI/CD Pipelines
• Frontend Development with React or Angular
• Technical Consulting

ATS Optimization Keywords

Hard Skills

• Java
• Kotlin
• Python
• Spring Boot
• Spring Cloud
• Jakarta EE
• CI/CD
• Containerization
• Cloud Services
• Frontend Development

Soft Skills

• Problem-Solving
• Self-Organization
• Team Spirit
• Communication Skills

Industry Keywords

• DevOps
• Clean Code
• Application Modernization
• Technical Architecture
• Enterprise Applications

Tools & Technologies

• JBoss
• WebSphere
• React
• Angular
• JSF
• PrimeFaces