Senior Backend Engineer (f/m/d)

Our Opportunity Over the past three years, Predium has built the leading real estate intelligence platform for ESG and value management in the DACH region - with the strongest names in the industry as customers: asset managers, housing companies, banks. Our customer base, our data, our credibility - that's valuable capital for the next step. Investment, credit, and asset management decisions in real estate are still made in Excel, case by case. We're now building the AI analyst that takes this work off people's hands - working directly on the customer's own data, scalable without adding headcount. We're well-funded, and we're bringing AI into real estate. Your Mission As a Senior Backend Engineer, you own the systems behind our platform: the GraphQL API, the relational data model, the background processing that turns customer documents and spreadsheets into structured data, and the permission model that lets a single owner and a bank with hundreds of portfolios use the same product. Most of your work runs from schema design all the way to the resolver. You partner with product, design and other engineers to make sure we build what matters - not just what you have been told to do. You take real responsibility for production: when something is slow, you find out why, whether the answer is a bad query, application code or the infrastructure underneath. You also help us make AI reliable in production. Document extraction, long-running analysis jobs and agentic features are core to where the product is going, and we need people who make these workflows testable and dependable rather than impressive in a demo. Our company size of ~40 people ensures that the best idea wins and political discussions are kept aside. And every line of code helps to improve the carbon footprint of real estate properties. Tech stack: TypeScript (NestJS backend, React frontend), Hasura/GraphQL, PostgreSQL (multiple databases incl. PostGIS), queue-based job processing, AWS (ECS / Elastic Beanstalk, S3, SES, Textract), IaC, Claude but all agents welcome What you'll own Build features across our Hasura GraphQL API, NestJS and Postgres. From schema design to resolver. Model complex real estate and ESG domains in relational schemas. We run several Postgres databases side by side (one of them geospatial), and schema decisions here have consequences but also positive impact. Own background processing: Excel imports, document extraction, long-running analysis jobs, 3D and image processing. Queues, retries, jobs that spawn other jobs - and figuring out what to do when step 3 of 7 fails at 2am. Develop our permission model. Customers range from a single owner to enterprises with organization/portfolio/building-level access. Integrate LLMs into backend workflows - especially document and data extraction - and make them reliable, verifyable and testable. Debug production. Navigate Grafana dashboards and traces to find out why something is slow or failing, whether in the app, the CI/build