Kotlin / Java Backend Engineer - Energy Tech / IoT (m/w/d)

CO2 emissions in the real estate sector must be reduced quickly. But what is not measured cannot be controlled in a targeted manner: Our live data on consumption and generation in properties enables the most effective use of electricity, gas, heat and water in everyday life. We are a young Berlin scale-up that supports sustainability and also lives it in our day-to-day business. We are looking for a Backend Software Developer in Berlin or Heidelberg at the earliest possible date. Responsibilities You design and develop a distributed, reliable backend software platform for our in-house operations and data processing.You drive the expansion of our platform's capabilities through strategic feature development and continuous improvement efforts, with a heavy focus on backend.You define and enforce architecral and infrastructural standards, prioritizing robust and modern technologies while avoiding unnecessary tech trends.You develop a deep understanding of complex business processes in the German energy market in order to work together with multiple stakeholders across all departments.You reconcile specifications and strategy with external boundary conditions (e.g. product standards, operational constraints, market regulations).You develop broad knowledge of capabilities and constraints across the German energy market, metiundo specifics, as well as integrated external systems. Profile You have a university degree in Computer Science, a related field or an equivalent qualification.You have at least 3+ years of experience in programming in Kotlin or Java, including the spring framework and build systems such as gradle or maven.It is an advantage if this is complemented with experience in golang and/or TypeScript and Vue.js.You have experience in designing and optimizing relational database schemas, particularly PostgreSQL.You are comfortable with Linux, working in a terminal and know how to use git and docker.Fluency in written and spoken English is required, with German skills being desirable.Bonus points: You worked with IoT or other hardware-in-the-loop systems before and gathered experience in the German energy market. What we offer A job that lays the foundations for using energy and water sustainably and consciously.Permanent position with a fixed salary of between EUR 60 - 70 thousand.Flexible trust-based working hours, part-time option, at least two days of mobile working per week, individual training plan and regular feedback meetings.Germany ticket or job bike, as well as an office with very good public transport connections.A green and dog-friendly office, terrace and free drinks.Complete technical equipment.30 vacation days/year.Company pension scheme.Family-friendly approach to reporting short-term illnesses in children. We want open and respectful cooperation in a diverse team! If you want to be part of it, we look forward to receiving your application.