Senior Java Developer

freshcells systems engineering GmbH; Deutschland; Vor Ort; EUR 70.000 - 100.000; Vollzeit

Benefits dieser Stelle

Flexible remote-work days

Dog-friendly environment

Company pension plan with subsidy

Monthly breakfast meetings

Deutschlandticket subsidy

Urban Sports Club membership subsidy

Bike leasing via JobRad

Relocation support

Free German courses

Zusammenfassung

freshcells systems engineering GmbH, headquartered in Düsseldorf, seeks a Senior Java Developer (f/m/d) for its software development team. You will design, implement, and refine high-performance Java web applications in collaboration with project management, design, and development teams.

Applicants should have several years of hands-on software engineering experience with Java, Spring Boot, and microservices.

Qualifikationen

• Multiple years of hands-on software engineering experience.
• Strong Java experience, including modern versions.
• Experience with Spring Boot.
• Ability to write and optimize SQL queries.
• Experience with SOAP/REST API integration.
• Familiar with microservices architectures and API-based/event-based communication.
• Proficient with build tools such as Maven/Gradle.
• Reactive programming experience (Project Reactor).
• Agile development in a team and result-oriented mindset.
• Good knowledge of distributed systems and English language.

Aufgaben

• Design and improve high-performance Java web applications using industry-standard frameworks.
• Contribute to the conceptual design and implementation of new features with cross-functional teams.
• Write automated tests and set up deployments for web applications.
• Profile and optimize performance bottlenecks in Java applications.

Kenntnisse

Java

Spring Boot

SQL

REST/SOAP

Microservices

Reactive programming

Distributed systems

Agile development

NoSQL

Jenkins/Maven/Gradle

Tools

Docker

Kubernetes

Helm

Maven

Gradle

Redis

Elasticsearch

Apache Ignite

GraphQL

Project Reactor

Jobbeschreibung

freshcells systems engineering GmbH is a software service provider based in Düsseldorf with a dynamic team of over 50 creative experts from various fields.

At freshcells, authenticity, individual talent development, and open communication are at the core of everything we do. We rely on respect, trust, and responsibility. As an innovation-driven company, we invest in new ideas. We know that the best results come from teamwork. We make mistakes – but we learn from them. We are open-minded and bold when it comes to exploring new paths.

Our DNA is centered around creating sustainable solutions with a strong commitment to excellence. We thoroughly analyze our projects in advance. That’s why we deliver what we promise. Our consulting is honest and customer-oriented.

Join us on our exciting journey in perhaps the most significant and forward-looking field of all – software development – as a Senior Java Developer (f/m/d) – Software Development (full-time)!

What do I need?

• We always remain ourselves.
• We promote individual talents.
• We are creative nerds from a wide variety of fields.
• We do not hide.
• We communicate openly, honestly & fairly.
• We build on respect, trust & responsibility.
• We are innovation driven and willing to invest in ideas.
• We know that the best results can only be achieved as a team.
• We make mistakes, but we learn from them.
• We are open, we are courageous.

• Flexible remote-work days
• Flex-time for early risers and night owls
• A dog-friendly working environment
• A secure and long-term job
• Company pension plan with employer subsidy possible
• Regular exchange, feedbacks, team meetings & retrospectives
• Monthly Company Breakfast
• Room for own ideas and personal development
• Digital training courses, available to every employee at his or her own discretion
• Subsidy for Deutschlandticket
• Subsidy for Urban Sports Club membership
• Special offers on travel, technology and more
• Bike leasing via JobRad
• Support with relocating processes
• Free German courses for newcomers

• Design and improve our high-performance Java web applications with industry-standard frameworks
• Conceptual design and implementation of new features for sophisticated software solutions in cooperation with the project management, design, and development teams
• Writing automated software tests and setup deployments for web applications
• Profiling and discovering performance bottlenecks in our Java applications

• Several years of hands-on experience in Software Engineering
• Strong experience with Java, including versions 11 and 21
• Experience with the Spring (Boot) framework
• Ability to write and optimize SQL queries
• Experience in Software Integration Development (SOAP/REST)
• You are comfortable with microservices architectures, API-based and event-based communication
• Experience with build and dependency management tools such as Maven and Gradle
• Familiarity with reactive programming principles and hands-on experience using Project Reactor
• Experience in agile development in a team and an organized and result-oriented work ethic for sustainable and scalable web systems
• Good knowledge of how to design distributed systems
• Good knowledge of the English language

• Experience in NoSQL
• Previous experience with lucene/solr/elasticsearch
• Experience with Docker and ideally, experience Kubernetes and Helm
• Experience with Apache Ignite and Redis
• Continuous Integration and Deployment with Jenkins (or others)
• Experience with GraphQL is a plus
• Experience with Reactive programming (Spring WebFlux)