About Us
We develop and operate an end-to-end platform for car sharing and vehicle rental, currently used by customers in Germany, Austria, and Spain.
The platform is fully white-label capable and includes mobile apps, web applications, back-office tools, and integrations with telematics hardware, payment service providers, and KYC providers — all from a single, modular codebase.
The backend is based on Java 17 / Jakarta EE 10 Payara, while the frontend is built with React / React Native.
We are currently in a strategic growth phase and are now looking for an experienced technical leader to help shape the next stage of our development.
The Role
As Tech Lead, you will take on a central bridging role between Engineering and company leadership. You will work closely with the CTO, support them operationally, and ensure that the platform keeps pace with the company’s growth — both technically and organisationally.
This position is designed for someone who can dive deep into the code while also keeping the bigger picture in mind. You are not afraid of a mature system with history — you see it as an opportunity.
Technical Leadership & Architecture
Further development and maintenance of the modular Java / Jakarta EE platform, including shared responsibility for architectural decisions
Implementation of the identified infrastructure improvements: IaC Terraform / CloudFormation, multi-region setup, and disaster recovery plan
Responsibility for implementing outstanding security measures
Driving the migration of binary data from MongoDB to S3, as well as further technical debt reduction projects
Evaluation and further development of the CI/CD pipelines GitLab CI and test coverage
Processes & Team Organization
Establishment of formal code review processes and consistent planning cycles within the development team
Close collaboration with the CTO on the gradual handover of engineering and operational responsibilities
Support in building a product management process aligned with customer requirements
Mentoring of the junior frontend developer and support for the senior engineers
Operations & Quality
Shared responsibility for monitoring, alerting, and incident response AWS CloudWatch, Sentry, Crashlytics
Automation of dependency vulnerability scanning within the CI pipeline
Technical support for customer projects — from onboarding through to troubleshooting
Must-Have
Several years of experience in backend development with Java — Jakarta EE / Java EE / Spring — in production systems
Strong experience with Test-Driven Development (TDD), as well as a strong quality mindset and interest in software craftsmanship
Proven experience as a Tech Lead or Senior Engineer with team responsibility
Solid understanding of cloud infrastructure, ideally AWS — EC2, ECS, CloudWatch, S3
Experience with MongoDB or comparable NoSQL databases in production environments
Familiarity with CI/CD pipelines — GitLab CI, GitHub Actions, or similar — and modern deployment practices
Hands-on mentality: you can deliver value immediately without requiring months of onboarding
Nice-to-Have
Knowledge of Infrastructure as Code — Terraform or CloudFormation
Experience with React and/or React Native on the frontend
Understanding of the mobility, car-sharing, or vehicle rental domains
Experience in regulated environments or with GDPR compliance projects
Knowledge of telematics hardware integrations or IoT-related systems
Class B driving licence
What We Offer
One of the most technically impressive small platforms in the German mobility landscape — with real responsibility from day one
Short decision-making paths and a high degree of freedom to shape things
A well-established team with 5–10 years of shared platform history
A modern tech stack: Java 17, Jakarta EE 10, React, React Native, GitLab CI/CD — without legacy burden
99.9% uptime — efficiency here is not an ambition, but a reality
Hybrid working with an office i
