Software Engineer (m/w/d)

You are interested in the position as Software Engineer (m/w/d) at reltix GmbH? On Instaffo, you can apply for this and other jobs with ease. Create your profile in under 2 minutes and start the application process with just a few clicks. Requirements Please note that this position requires work authorization for Germany. Language: German - Fluent (C1), English - Fluent (C1) 3+ years of professional engineering experience, with real depth on the backend.Strong in a modern backend language (preferably Golang/Python), comfortable designing data models, APIs, and services from scratch.Experience shipping in a modern web stack (React + TypeScript).Solid with relational databases and a good sense for structuring data well.Curiosity about the frontend and a genuine wish to go full-stack.A pragmatic, shipping mindset and ownership as a default.Nice to have (IaaS & IaC): AWS (or equivalent cloud), Terraform (or Pulumi), and comfort working on platform/infrastructure when needed.Bonus: AI-powered product features, event-driven architectures, third-party API integrations, or early-stage experience. Activities Design and build the backend services and APIs at the core of the product: data models, business logic, and the integrations everything else depends on.Ship features end to end, from schema and API to the behaviour users experience, and grow into the frontend as far as your curiosity takes you.Build the systems that power our AI surfaces, with the full context of the property available to the voice agent, the owner chatbot, and the manager software.Integrate with third-party systems across the real estate and financial ecosystem.Work directly with the founders and operations team to decide what to build, then ship it fast and iterate. Team You will join a small, senior engineering team of over 30+ people that ships fast. We operate with tight feedback loops, working directly with the founders and the operations team to build software for an industry that has never had any. About The Company Reltix is a fast-growing PropTech startup based in Düsseldorf, on a mission to transform the property management industry - and we build our own technology to do it. Rather than buying off-the-shelf software or acting as a traditional property manager, Reltix develops its own internal operating system in-house, covering everything from homeowners' association (WEG) management to rental management. As we deliver the service, we automate it - and as we automate it, we embed AI into every workflow. This means our technology isn't a product built for external customers to buy - it's the platform that runs the entire company, with real, immediate impact on how we work every day. With a team of nearly 50 people across offices in Düsseldorf, Essen, and Frankfurt, Reltix already manages around 5,000 residential units and has secured significant funding to fuel further growth. We combine a strong entrepreneurial culture with a clear vision: replacing outdated, paper-based processes with smart, digital workflows and AI-powered tools. At Reltix, you get ownership from day one, work directly with the founding team, and see your work translate into product and business impact fast. Click on "Apply" for details on the benefits, the team and the application process.