Senior Backend-Developer – 100% Remote

We're seeking experienced Backend or Fullstack Developers with a strong systems-design mindset to join our fully remote team. If you like complexity, enjoy thinking hard about data, scale and reliability, want to implement AI-solutions and enjoy working with Claude/Cursor/Codex, this could be the right role for you. What you'll do Develop and maintain our web application Design and own our data layer – schema and table design, relationships and indexing, and query/load optimization that holds up as the system grows Design queues, background jobs and long-running workflows that stay correct and reliable under heavy load Contribute to architecture decisions, the direction of our stack, and the overall product vision Build robust pipelines for document- & email processing and 3rd-party-integrations that handle volume spikes gracefully Build and optimize agents for our growing template-library Extend our RAG / knowledge base system (embeddings, semantic search, reranking) Operate in an AI-first development setup powered by Claude/Cursor Manage version control and team collaboration via GitHub Our techstack Backend: TypeScript Frontend: Nextjs, React, Tailwind, shadcn/ui Database: We don't want to disclose this publicly at the moment About Us We are a German automation agency turned into a SaaS with our product hausverwalter.ai . Most Germany property managers work with 5-10 software tools daily. Our goal is to replace them all, while also building autonomous agents right into the software. For a closer look at what we're building, check out our YouTube channel — heads up, it's in German. The role is fully remote – though you're always welcome to drop by our office in Worms, Germany. You'll fit in well if you're after more than just the "freedom part" of remote work and are truly eager to roll up your sleeves and grow alongside us for the long haul. Salary $1000 - $3000 per month before taxes. There will be room for growth and promotion in the years ahead What we offer 100% remote work AI-first mindset As many Codex/Claude/Cursor-Subscriptions as you need Permanent employment-contract in your country of residence through our partner Deel (Employer of Record) A software that our customers are genuinely excited about Modern tech stack – you'll work exclusively with cutting-edge technologies Focus on building, instead of long meetings Job security: Everyone we bring on is meant to grow with us over the long term. Every hire is aimed at permanent employment. Strong pay & career prospects: We'll continue growing and expanding in the years to come. To do that, we need more experts and/or leaders on board. Very flexible working hours The freedom (and responsibility) to design and implement your own features If a long-term remote position at a structured, growing company sounds like what you're after, we'd be glad to receive your application. 3+ years building production web backends or full-stack apps — you’ve owned schema design, indexing, and query performance, not only CRUD on existing models Solid backend and systems-design experience – you can design a database from the ground up (tables, relationships, indexes) and reason about database load, query performance and data growth, not just write CRUD against an existing schema Comfort with queues, background jobs and long-running workflows, and the judgment to make the hard design trade-offs they involve You treat reliability, scalability and maintainability as default concerns. If you've read "Designing Data-Intensive Applications" (Kleppmann) – or simply think that way – you'll feel right at home here Solid English for async remote collaboration; German not required You work autonomously and take full ownership of your tasks Comfortable working under performance pressure Quick on the uptake and a disciplined approach to your work Please note that the application form on the next page is in German. That said, German language skills are not required for this role.