Senior Software Developer (m/f/d) Java/Kotlin with Spring Boot

Role Overview

Join our backend team in Darmstadt and work on our etaONE platform. Take technical ownership, contribute to architectural decisions, and support the growth of our engineering team.

What You Will Do

Design, develop, and maintain scalable backend features, contribute to the evolution of our cloud-native microservice architecture, and improve our system landscape using modern technologies.

Why It Might Be a Fit

You will feel right at home with us if you care about clean code, modern architectures, and meaningful software. You will have the opportunity to mentor and support junior developers, collaborate with product management, and participate in internal knowledge exchange.

Requirements

• At least 5 years of professional experience in backend software development with Spring Boot or comparable frameworks
• Strong proficiency in Java and/or Kotlin
• Experience in building RESTful APIs as well as working with SQL and data modeling
• Hands-on experience with relational databases, ideally PostgreSQL
• Solid understanding of software architecture, clean code principles, and modern software engineering practices
• Experience with CI/CD pipelines and automated testing (e.g., JUnit, Mockito, MockK)
• Experience in taking technical ownership, mentoring, or supporting less experienced developers
• Fluent English skills, both written and spoken

Benefits

• Purpose-driven work
• Flexibility (hybrid working with home office options and flexible working hours)
• Team spirit (supportive, collaborative environment with plenty of room for exchange and cooperation)
• Community (regular team events and shared activities)
• Work-life balance (30 days of vacation plus a flexible, agile work culture)
• Well-being (tax-free benefits card, subsidized local gym membership, and the option of a job bike)