Document AI Backend Engineer

pstrongWho we are /strong /p pThe GoCalma Startup was founded in 2025. Our HQ is in Zug. We simplify the personal office: we turn people's stacks of paper into clarity. We bring a household's private documents to one safe place, give people an overview and explain their finances in plain language. /p p**brWhy now** /p pWe are still small and hiring our first team members. You join early, help shape how the company and the product work, and your decisions have real impact. This is not a role where you wait for tickets. You build things and see them reach real users. /p p**brOur core values** /p ul listrongOpen Direct. /strong We say what we think, early and clearly. /li listrongFun Joy. /strong We take the work seriously, not ourselves. /li listrongEncourage Challenge. /strong We back each other and we push each other. /li listrongNo Half-Measures Full Conviction. /strong We commit, and we finish what we start. /li /ul h2Tasks /h2 pstrongWe're looking for our first Backend Engineer /strong /p pYou own the API that powers our app and admin portal. You have a real say in architecture and data model, and you carry your work from idea to production. /p p**brGoals of this role** /p ul liOwn and evolve the backend so the app and admin portal stay fast, reliable and safe to change. /li liTurn uploaded documents into structured, useful data: extracted, summarised, classified, named and easy to find again. /li liMake our AI chat genuinely useful, so people get real answers about their own documents and topics like taxes, insurance and pension. /li /ul pstrongMain responsibilities /strong /p ul liBuild and maintain our API for documents, checklists and the chat assistant in production. /li liDevelop the document pipeline: OCR, summarising, classifying, naming and making documents findable again. /li liBuild the AI chat that answers questions about a user's documents. It combines per-user context from past chats with a shared knowledge base (Markdown wiki) and covers topics like taxes, emergency documents, insurance, pension etc. /li liIntegrate external and potentially on premise AI providers for classification and chat, including streaming responses. /li liOwn the data model, use cases, permissions, security and multi-tenant logic, plus deployment and monitoring. The API mainly powers our B2C mobile app 24x7, and also serves fiduciaries and other organisations. /li /ul h2Requirements /h2 pstrongAttitude /strong /p ul liYou identify with our mission. /li liCuriosity to figure things out and the drive to execute them. /li liYou are comfortable building AI-assisted. We write around 80% of our code with AI, grounded in extensive documentation, and you keep ownership of design, review and quality. /li liYou care about handling sensitive data properly. Privacy is a foundation for us, not an afterthought. /li /ul pstrongHard skills /strong /p ul liAI and LLM integrations, document processing, or running your own deployments. /li liExperienced in building reliable backends. We currently use Ruby on Rails for the prototype, so Rails is a plus, but strong backend fundamentals matter more than any one framework. /li liA real track record: things you built and shipped, not just courses you took. /li liStrong API design and automated testing. Both are required, not optional. /li /ul pstrongSoft skills /strong /p ul liStand up for your opinion, and stay open to other ideas. /li liKeep the user at the centre of every decision. /li /ul pstrongHow we build /strong /p pWe write around 80% of our code AI-assisted, grounded in extensive documentation. Good docs are how we keep this fast and safe: you write and maintain them, then let AI do a lot of the typing while you stay in charge of architecture, review and quality. If that sounds like a downgrade to you, this is not the right team. If it sounds like leverage, you will feel at home. /p pstrongWhat else do you need to know? /strong /p pWe work flexibly. Full-time or part-time from 60%, hybrid, with our team based in Zug. We are open on where you work from, as long as we get real overlap and see each other regularly in Zug. /p pstrongWhat hiring process can you expect? /strong /p ol listrongApply and fill out survey. /strong /li listrongShort task. /strong A small, realistic task, capped at 2 hours. You get honest feedback either way, guaranteed. /li listrongTwo interviews. /strong One with the team on how you work, one on the mission and the fit both ways. /li /olbr