Senior Java / Kotlin Developer

Job title: Senior Java / Kotlin Developer

Company: Kuba


Job description: Who we areIn 2019, Kuba was founded to bring fresh ideas to the mobility payments space.We launched a mobility platform that’s fast, simple and cost-effective to deploy. Our scalable, account-based ticketing engine is the foundation. Transit agencies can build on this cloud-based solution to launch contactless payments and Mobility-as-a-Service.Kuba is growing fast and its technology is used in more than 500 cities and regions around the world. It is a member of the ICM Mobility Group, an investor in mobility solutions driving a new era of digital payments.Kuba offers modern, efficient, and scalable transport ticketing solutions globally, and we are currently seeking a talented Senior Back-End Developer to elevate our technology stack in Copenhagen. In this role, you will be pivotal in designing and building the backend architecture, ensuring high-performance, reliability, and maintainability of our applications.Your RoleBring your expertise and passion for backend development to Kuba, where you’ll lead projects that greatly impact our clients and the communities we serve. As a Senior Back-End Developer, you will collaborate with cross-functional teams to design and implement RESTful services and develop robust APIs that meet both current and future business requirements.Key Responsibilities

• Lead the design and development of scalable and secure backend solutions.
• Develop new features and APIs that enhance existing software products.
• Maintain and optimize existing applications, ensuring optimal performance and scalability.
• Implement testing and debugging procedures to ensure code quality.
• Mentor junior developers and assist in their professional development.
• Collaborate with front-end developers to integrate user-facing elements with server-side logic.
• Stay updated with emerging technologies and best practices in backend development.

RequirementsRequired Qualifications:

• Minimum 5 years of professional experience in backend development.
• Strong proficiency in Java and/or Kotlin.
• Extensive experience with relational databases, particularly MySQL.
• Deep understanding of RESTful API design principles.
• Experience with cloud services, especially AWS.
• Proficient in Git for version control and familiarity with collaborative tools like Jira.
• Excellent problem-solving skills and analytical mindset.
• Strong communication skills in English.

Preferred Qualifications:

• Experience with microservices architecture.
• Familiarity with CI/CD pipelines and DevOps practices.
• Prior experience in leadership or mentoring roles.

BenefitsBe part of an organisation that’s leading mobility payment innovation and transforming public transportation experiences across the world. You’ll join a global team of 350, based in offices in Denmark, France, Italy, South Africa, the United States and the United Kingdom. Our Denmark office, in the heart of Copenhagen, is a spacious hub of engineering excellence.

• Learn and grow while creating solutions that make real-world impact.
• Join a dynamic, inclusive team with great colleagues, team events, and flexibility.
• Competitive salary and benefits, including:

• Health care
• Home-working tools and equipment, including subsidized internet
• Choose a Mac or PC
• Employee club with monthly events, Friday bars, etc.
• On-site massage at the office

Expected salary:

Location: København

Job date: Thu, 21 Aug 2025 22:08:31 GMT

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