l1r1 changes the way humans use software. l1r1 builds a system that understands human language and executes tasks automatically in the domain of business software.

We are l1r1 and we are building a cognitive AI for your business. Software today needs to be directed by humans, it does not plan and execute by itself. You as a user do not have to use software any longer via an interface but with pure verbal communication. Therefore, we are building a cognitive system by combining semantics, AI and language technology. We are not inventing something new, but we are using current software in such a way that it uses its full potential.

We are looking for a Quarkus engineer to help build our core system.


Mission: Help developing and maintaining the core platform of l1r1 in Quarkus.


  1. Develop the core system in Java. We are using the Quarkus framework.
  2. Design and implement APIs with Quarkus.
  3. Experience with Docker and writing Docker files.
  4. Write unit tests and help define API tests in cooperation with our test engineer.


Software Engineering


  • Quarkus/Vertex
  • Microservice Architecture
  • Integration with OIDC + OAuth2.0
  • Keycloak
  • Testing in Java
  • Lucene/Solr/ElasticSearch is a plus
  • Kafka is a plus
  • Python is a plus
  • SQL is a plus
  • Kafka is a plus
  • Understanding of CICD pipelines

Social Skills:

  • independent
  • logical thinking
  • interested in engineering
  • creative
  • problem-solving
  • analytical
  • structured
  • persevering
  • team player > solo star
  • flexible


l1r1 is an ambitious start-up built by a team of experts. The benefits are:

  • ambitious idea -> the leverage is high
  • experienced team (2 successful IPOs)
  • get % of the company
  • one of the first employees -> you shape the company
  • great environment to learn and grow
  • you get responsibility from day one

We are looking forward to hearing from you.

Job Category: Engineering / Technics
Job Type: Employee
Job Location: Berlin (Germany)

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