Senior Full-Stack Developer Kotlin & TypeScript (gn)

Your mission

The Bikeleasing Group has grown into a leading corporate group for employer benefits and mobility solutions. It consists of six specialized companies, including a multi-benefit provider (Probonio), leasing and insurance service providers, and retailers for refurbished bikes. With our continuous profitable growth and expansion, we are on an exciting technical transformation journey. For this, we are looking for an experienced Senior Full-Stack Developer (gn) who will actively shape our technology ecosystem.

You design and implement new services using Kotlin (Backend) and React (Frontend), and support the further development or redevelopment of existing legacy systems (PHP)
You take responsibility for modernizing critical business processes, including the migration of core services to a service-oriented architecture with Kotlin/Spring Boot, ensuring a smooth transition
You actively contribute to shaping the architecture, API landscape, and technical standards to develop scalable and sustainable solutions
You ensure clean code, testability, and maintainability, conduct code reviews, and promote best practices within the team
You collaborate closely with stakeholders such as the CTO, Tech Lead, Product Owner, etc., actively participate in agile processes, and support as well as coach your team members

Your profile

You have several years of professional experience in software development, either with Kotlin or with Java plus initial exposure or willingness to learn Kotlin - Spring Boot experience is beneficial
You also have solid knowledge of TypeScript and one or more frontend frameworks (e.g., Angular, Vue.js, Next.js) - React preferred
You have a deep understanding of modern architecture designs, plus Domain-Driven Design (DDD), and you can effectively apply these principles in development
You write readable, testable, and clean code and place great importance on high code quality and maintainability
You have experience in refactoring large applications and can efficiently modernize existing systems
You are familiar with distributed systems and you have cloud services knowledge, ideally AWS
While focusing on our new micro-services infrastructure, you are also willing to work on the still existing legacy monolith infrastructure, if needed
You are a pragmatic problem solver who can balance technical excellence with business requirements
You have fluent English language skills; German language skills are a plus
Residency in Germany is required

Why us?

We live the team spirit: YOU are important to us.

Every day, our constantly growing dynamic team does great things and we want you by our side.

• A modern tech environment: Kotlin, TypeScript, PHP, Python; frameworks such as Spring Boot, Vue.js, React, NestJS, Symfony; cloud infrastructure on AWS, fully provisioned with Terraform.
• Reasonable technical equipment - you can choose your own operating system (Windows or MacOS)
• Through our shared Udemy account, you can attend training courses and also get free time to devote to further training. We also regularly attend tech conferences.
• Participation in our internal tech talks, which we use to keep ourselves up to date and trained
• Maximum flexibility in the form of flexitime, remote work & workstations
• Probonio: With Probonio, you receive a €50 voucher once a month, which you can choose freely. An additional €60 is added once a year on your birthday
• You are not living in Germany or Austria, but are willing to relocate? We support you by offering a relocation-package
• Unbeatable insurance conditions when it comes to your company pension scheme and capital-forming benefits

It goes without saying that you can also lease up to two bicycles or pedelecs between €649 and €15,000 through us as your employer.

We see diversity as an enrichment for our team. That's why we welcome all applications and would particularly like to encourage people with disabilities or other challenges to apply to us.

About Us

Who we are.

Environmentally aware, committed and service-orientated: Our success is the result of strong teamwork. We currently employ over 400 company bike enthusiasts at our company locations in Germany and Austria. Will you soon be one of them?

What We Do.

We help employees, self-employed people and freelancers switch to the company bike model. Currently more than 70,000 companies and public sector organizations with more than 3.5 million employees rely on the services of BLS Bikeleasing-Service GmbH & Co. KG.

Our mission.

We continue to grow, promoting sustainable, ecologically sound and socially just mobility by working to ensure that even more people will be able to enjoy the benefits of the lease-financed company bike in the future.