Full-Stack Developer (Java/Kotlin, SQL)

Quick Facts

• Role: Full-Stack Developer (Java/Kotlin, SQL)
• Team/Area: Data Processing & Analytics (service area)
• Focus: Automating and optimizing internal data and IT processes; building internal software solutions
• Contract: Typically initially fixed-term (1 year), with planned transition to permanent employment
• Schedule: 40 hours/week with flexible working time; 30 vacation days
• Benefits: Structured onboarding with mentor; internal academy; flexible hours; 1–2 days mobile work/week; learning time; additional benefits (BusinessBike leasing, HanseFit, accident insurance, parking, regular events)

Description

You will help automate and optimize internal data and IT processes and develop department-specific software solutions. The position focuses on full-stack development: modern frontend features, robust REST API design, and high-performance data processing with PostgreSQL or MSSQL. You will ensure code quality through testing and documentation while collaborating in agile teams.

Responsibilities

• Develop and maintain complex applications
• Implement modern frontend features
• Design robust REST APIs
• Deliver performant data processing using PostgreSQL/MSSQL
• Own complex development tasks and actively shape the software architecture
• Ensure high code quality through testing and clean documentation; promote best practices
• Collaborate with users in cross-functional teams to gather requirements and maintain clear documentation
• (Ideally) contribute to continuous improvements of build, test, and deployment processes

Requirements

• Completed degree in Computer Science or comparable qualification
• Solid and multi-year professional experience as a Full-Stack Developer (at least 2–3 years)
• Expert backend experience with Java or Kotlin; Python is a plus
• Good knowledge of frontend development
• Secure SQL database skills (PostgreSQL, MSSQL)
• Structured, analytical, and methodical working style for planning and implementing software projects
• Fluent German (min. C1)

Benefits

• Structured onboarding with a personal mentor
• Internal academy with dedicated learning time
• Flexible working hours and time account
• 1–2 days mobile work per week
• BusinessBike leasing, HanseFit membership, accident insurance
• Regular team and company events
• Free on-site parking
• High job security